Indiana is the Circuit Breaker state. Article 10 §1 of the Indiana Constitution caps property tax liability at 1% of gross assessed value for homesteads, 2% for other residential and agricultural property, and 3% for other real and personal property. The cap functions as an automatic bill ceiling regardless of assessment — a value appeal only reduces your bill when the bill is currently below the cap. For homesteads in higher-millage Indiana jurisdictions (Lake, Marion, Tippecanoe), most owners are already at the 1% cap and value reductions are absorbed by the cap rather than reducing the bill. See the §6 Editor's Note.
| Metric | Value |
|---|---|
| Statutory valuation standard | True tax value (market value-in-use) at 100% of value as of January 1 of the assessment year (IC 6-1.1-31-6 et seq.); for taxes due and payable in the following calendar year |
| Reassessment cycle | Annual trending (since 2009) using county ratio studies; cyclical reassessment revisits 25% of parcels per year on a four-year rotation since July 1, 2014 (IC 6-1.1-4-4.2) |
| Appeal venue (Tier 1) | County Property Tax Assessment Board of Appeals (PTABOA) under IC 6-1.1-28; preceded by mandatory informal preliminary conference with assessing official |
| Appeal venue (Tier 2) | Indiana Board of Tax Review (IBTR) under IC 6-1.5-4 et seq.; Form 131 within 45 days of PTABOA Form 115 determination |
| Appeal venue (Tier 3) | Indiana Tax Court under IC 33-26; original tax appeal within 45 days of IBTR final determination |
| Form 130 filing deadline | June 15 of the assessment year if Form 11 mailed before May 1; June 15 of the year tax statements are mailed if Form 11 mailed after April 30 (IC 6-1.1-15-1.1) |
| PTABOA hearing timing | At least 30 days notice to taxpayer; if not resolved at informal level within 180 days, hearing must be held (IC 6-1.1-15-1.1) |
| Burden of proof | Taxpayer bears initial burden; shifts to assessor under IC 6-1.1-15-20 when assessment increases more than 5% over prior year (exceptions: substantial renovations, zoning, use changes); if neither meets burden, value reverts to prior year |
| Tax payment during appeal | Full payment required by due date; refunds issued if appeal succeeds |
| Filing fee (PTABOA) | $0 — no filing fee for Form 130 |
| Filing fee (IBTR Form 131) | $0 — no filing fee for IBTR petitions |
| Filing fee (Indiana Tax Court) | $120 for original tax appeal |
| IBTR Small Claims | Form 131 §2 small-claims election available when assessed value at issue does not exceed $45,000 in disputed AV (IBTR streamlined procedure) |
| Circuit Breaker caps | 1% homestead / 2% other residential and agricultural / 3% other property of gross assessed value (IC 6-1.1-20.6 and IN Const. Art. 10 §1); applied as automatic credit on tax bill |
| Standard Homestead Deduction | $48,000 for 2025 pay 2026; phasing down to $0 by 2030 under SEA 1 of 2025 (IC 6-1.1-12-37) |
| Supplemental Homestead Deduction | 37.5% of AV ≤ $600K plus 25% of AV > $600K, applied after Standard Deduction (IC 6-1.1-12-37.5); rising annually to 66.7% by 2030 under SEA 1 §45 |
| Supplemental Homestead Credit (new) | Lesser of 10% of property tax bill or $300 — automatic, no application required (IC 6-1.1-20.6-7.7, added by SEA 1 of 2025) |
| Over 65 Deduction | $14,000 AV deduction (IC 6-1.1-12-9); income $30K individual / $40K combined; AV cap removed by SEA 1 |
| Over 65 Circuit Breaker Credit | Caps annual liability growth at 2% for qualifying seniors (IC 6-1.1-20.6-8.5); income limit raised to $60K individual / $70K couple under SEA 1; $240K AV cap removed |
| Disabled Veterans Deduction | $24,960 + $14,000 stackable depending on disability rating and service status (IC 6-1.1-12-13, -14, -14.5) |
| Mortgage Deduction | Repealed effective January 1, 2023 (HEA 1260 of 2022 §12) — replaced by $3,000 increase to Standard Homestead Deduction |
| Property tax administrative agency | Department of Local Government Finance (DLGF) under IC 6-1.1-30; oversees assessor training, ratio studies, and rule-making |
Valuation principle. Indiana assesses real property at true tax value, defined as the market value-in-use of a property under IC 6-1.1-31-6. The assessment date is January 1 of the assessment year for taxes due and payable in the following calendar year. So January 1, 2026 is the assessment date for taxes payable in 2027. There is no statewide assessment ratio — assessments are at 100% of true tax value, not a fraction.
The math.
Gross AV = True tax value as of January 1
Net AV = Gross AV − Standard Homestead Deduction ($48,000 in 2025)
− Supplemental Homestead Deduction (37.5% × first $600K, 25% above)
− Other applicable deductions (Over 65, Disabled Vet, etc.)
Tax Base = Net AV
Pre-credit Bill = Tax Base × Total Tax Rate (per $100 of AV)
Circuit Breaker = MIN(Pre-credit Bill, 1% × Gross AV) for homesteads
MIN(Pre-credit Bill, 2% × Gross AV) for other residential / agricultural
MIN(Pre-credit Bill, 3% × Gross AV) for other property
Final Bill = Circuit-Breaker-capped bill − Supplemental Homestead Credit (lesser of 10% or $300)
− Over 65 Credit, Disabled Vet Credit, etc.
Example: $300,000 homestead in a high-millage Indiana jurisdiction
- Gross AV: $300,000
- Standard Deduction (2025): −$48,000
- Supplemental (37.5% of $252,000): −$94,500
- Net AV: $157,500
- If total rate is $4.50 per $100: pre-credit bill = $7,087
- 1% Circuit Breaker cap on $300,000: $3,000
- Capped bill: $3,000
- Supplemental Homestead Credit: min($300, $300) = −$300
- Final bill: $2,700
In this case, the bill is set entirely by the Circuit Breaker — the deductions
do not reduce the bill because pre-credit liability already exceeded the cap.
A successful value appeal that reduces gross AV to $250,000 would lower the
cap to $2,500 — that DOES reduce the bill. But a reduction from $300K to $290K
would not move the bill at all (still capped above pre-credit liability).
Reassessment mechanics — three distinct elements:
(a) General/system-wide cyclical reassessment. Under IC 6-1.1-4-4.2, since July 1, 2014, assessing officials reassess approximately 25% of the parcels in their jurisdiction each year on a four-year cycle, physically revisiting each parcel once every four years. The cycle staggers across counties — your county is on a published rotation that the DLGF approves. This replaced the prior 2002/2012 statewide general reassessment model.
(b) Mid-cycle individual reassessment triggers. Outside the cyclical rotation, individual properties are reassessed when:
(c) Annual mechanisms between cyclical reassessments. Three:
Two appealable error types:
Local administrative structure. Indiana's primary assessing official is the county assessor (since the 2008 township-assessor consolidation under HEA 1001-2008). A small number of larger townships retained their own elected township assessors when voters opted to keep them; most townships transferred assessment to the county. PTABOAs are county-level. The DLGF is the state-level oversight agency. The IBTR is the state-level review tribunal. The Indiana Tax Court is the state-level judicial review venue.
✓ Worth appealing if any of these apply:
✗ Not grounds for appeal in IN:
Your move. Pull your county assessor's online property card and check four numbers against reality: (1) the gross assessed value, (2) your homestead designation status (Standard Deduction + Supplemental Deduction + 1% cap should all be applied), (3) any factual data points (square footage, year built, classification), and (4) your prior-year assessed value to determine if the increase exceeds 5% (which shifts the burden to the assessor under IC 6-1.1-15-20). Then compute your pre-credit liability against the Circuit Breaker cap (1% of gross AV for homesteads). If your bill is at the cap and a modest assessment reduction won't push it below, the appeal won't move the bill — focus instead on confirming homestead designation and applicable deductions are filed.
Cost of appealing in Indiana (DIY-friendly through PTABOA; structured at IBTR):
| Cost line | IN reality |
|---|---|
| Form 130 filing fee | $0 — no filing fee at any tier through IBTR |
| Indiana Tax Court filing fee | $120 for original tax appeal |
| Time commitment (DIY through PTABOA) | 3-8 hours typical: pulling property card, comping with sales, drafting Form 130, attending informal conference, attending PTABOA hearing |
| Independent appraisal | $400-$700 for residential 1004-form appraisal; recommended at IBTR for non-trivial cases |
| Professional contingency representation | Typical 25-40% of first-year tax savings; some firms operate flat-fee at PTABOA ($300-$800) |
| Tax payment during appeal | Full payment required by due date; refunds issued with interest if appeal succeeds |
| Risk of value being raised on appeal | Low for residential — PTABOA has authority to raise but is constrained by the assessor's burden under IC 6-1.1-15-20 when increase exceeds 5%; the 5% rule effectively discourages retaliatory raises on appeal |
Realistic outcomes by tier:
01
File Form 130 — Taxpayer's Notice to Initiate an Appeal with the local assessing official (county assessor or, in opt-out townships, township assessor). Form 130 begins the appeal under IC 6-1.1-15-1.1 (effective July 1, 2017 — replaced the prior process). The assessing official must hold an informal preliminary conference within a reasonable time. Many factual-error and obvious overvaluation cases resolve here, with the assessor and taxpayer signing a Form 134 (Joint Determination).
02
If the informal conference does not resolve the dispute within 180 days of filing, the County Property Tax Assessment Board of Appeals (PTABOA) under IC 6-1.1-28 must hold a hearing. PTABOA gives at least 30 days notice of the hearing date. Hearings are evidentiary but not formal — taxpayer presents evidence, assessor presents evidence, board questions both. The PTABOA issues a written Form 115 determination.
03
Appeal the PTABOA Form 115 determination by filing Form 131 — Petition to the Indiana Board of Tax Review within 45 days of the date PTABOA gives notice of the determination (IC 6-1.5-5-1). Form 131 has a small-claims election in §2 (used when disputed AV ≤ $45,000). After IBTR final determination, an original tax appeal to the Indiana Tax Court must be filed within 45 days under IC 6-1.1-15-5 and IC 33-26.
Tax payment during appeal. Indiana requires full payment of the disputed tax by the due date regardless of pending appeal. Failure to pay triggers interest, penalties, and potential tax sale. If the appeal succeeds, the county refunds the overpaid portion. Do not withhold payment to "force" the appeal.
The 5% burden-shift rule (IC 6-1.1-15-20). When a property's assessed value increases more than 5% over the prior year, the burden of proof shifts to the assessing official to prove the new assessment is correct in any review or appeal — at PTABOA, IBTR, AND Indiana Tax Court. If the assessor fails to meet that burden, the taxpayer may then introduce evidence of the correct value. If neither party meets the burden, the assessment reverts to the prior year's value. Exceptions: substantial renovations, zoning changes, or use changes that were not considered the prior year. This is one of the strongest taxpayer-protective burden rules in the country and is materially under-used by Indiana property owners.
✓ What you need to submit:
✗ Common reasons appeals get dismissed:
Theory selection. Two appealable error types in Indiana: market value-in-use ("my assessment exceeds my property's market value") and uniformity ("my assessment is materially higher than comparable nearby properties at the same time"). For most residential cases, the market value-in-use approach with comparable sales is stronger. For neighborhoods with unusual assessment patterns (recent revaluation that hit some parcels harder than others), the uniformity approach may produce larger reductions. When the IC 6-1.1-15-20 burden-shift applies (>5% YoY increase), the taxpayer can lead with either approach because the assessor must defend the new value first.
5% burden-shift IC 6-1.1-15-20 — when assessment increases >5% YoY, burden shifts to the assessor; if neither party proves their case, value reverts to prior year. Most-under-used taxpayer protection in IN.
1% / 2% / 3% caps Article 10 §1 of the IN Constitution — homestead 1%, other residential and agricultural 2%, all other 3% of gross AV. The cap is the bill's automatic ceiling regardless of value.
45-day windows PTABOA Form 115 → Form 131 to IBTR (45 days) → Indiana Tax Court (45 days from IBTR final). Both are jurisdictional. No waivers available for missed deadlines.
The four pattern outcomes from Indiana's published decisional framework:
The most reliable Indiana appeal grounds: documented errors in square footage, year built, basement finish status, garage type, neighborhood/grade code, classification (especially residential vs agricultural transition acreage), or lot size. These cases resolve at the informal conference or PTABOA hearing with high regularity. The successful appeal: pull the county property record card, identify specific data points that don't match the property, document with photos and (where applicable) a recent inspection report, and present at the informal conference. The assessor often signs a Form 134 Joint Determination correcting the record.
When the year-over-year assessed value increase exceeds 5%, the burden shifts to the assessor — at PTABOA, IBTR, AND Indiana Tax Court. The under-use is structural: most taxpayers do not realize the rule exists or how to invoke it. The successful appeal: cite IC 6-1.1-15-20 in the Form 130 narrative; request that the PTABOA require the assessor to present evidence first; if the assessor's evidence does not support the increase by preponderance of the evidence, the value reverts to the prior year's assessment. The exception categories (substantial renovations, zoning changes, use changes) limit the rule's application but do not eliminate it for ordinary trending-driven increases.
The cumulative effect of the Standard Homestead Deduction ($48,000 in 2025), the Supplemental Homestead Deduction (37.5% of remaining AV up to $600K), the 1% Circuit Breaker cap (instead of 2% or 3%), and the new Supplemental Homestead Credit ($300 cap) is several thousand dollars per year for a typical Indiana homestead. When homestead status is missing or removed in error — a common situation for owners who filed Sales Disclosures incorrectly, who moved between properties, or whose homestead designation lapsed — the bill increase is dramatic. Restoring the homestead through a deduction-restoration appeal at PTABOA produces some of the largest single dollar-value bill reductions in Indiana property tax practice.
The most common strategic error in Indiana property tax appeals: pursuing a value appeal that won't move the bill because the Circuit Breaker is already binding. For homesteads in higher-millage counties (Lake, Marion-Center, Tippecanoe-near-Purdue, parts of Allen and St. Joseph), the 1% cap is often the bill's ceiling regardless of assessment. A 5% reduction in gross AV produces a 5% reduction in the cap-implied bill ceiling — and if the original bill was at that ceiling, that's the savings. But when a much larger assessment reduction is needed to push pre-credit liability below the cap, only then does each additional dollar of assessment reduction reduce the bill. Pre-checking your Circuit Breaker status before filing Form 130 separates appeals that move the bill from appeals that don't.
The Indiana property record card (PRC) is the assessor's data sheet for each parcel. It records: legal description, owner, mailing address, neighborhood code, classification, land details (acreage, soil productivity for agricultural), improvements (each structure, with square footage, year built, condition, grade, basement type, garage), and the year-by-year assessment history. PRCs are accessible online through county GIS portals (most counties use Schneider Geospatial / Beacon, XSoft Engage, or county-built portals).
Common errors that produce winning appeals at PTABOA:
The successful appeal: pull the PRC online, identify specific factual errors with photographic and documentary evidence, file Form 130 with the documented corrections, and present at the informal conference. Most factual-error appeals resolve at the informal conference with a Form 134 Joint Determination.
Indiana Code 6-1.1-15-20 states that when an assessment is an increase of more than 5% over the assessment for the same property for the prior tax year, the assessor making the assessment has the burden of proving that the assessment is correct in any review or appeal under this chapter and in any appeals taken to the Indiana Board of Tax Review or to the Indiana Tax Court.
If the assessor fails to meet the burden, the taxpayer may introduce evidence to prove the correct assessment.
If neither party meets the burden, the assessment reverts to the prior tax year's assessment.
Three exceptions limit the rule's application — when the assessment increase is based on (1) substantial renovations or new improvements, (2) zoning changes, or (3) use changes that were not considered in the prior year's assessment.
The procedural mechanics that matter:
The rule is materially under-used because most Indiana taxpayers don't know it exists. Annual trending (since 2009) drives many properties' assessments above the 5% YoY threshold in any given year, particularly in rapidly appreciating markets like Hamilton, Marion, Hendricks, and Hamilton-adjacent counties. The rule does not require the taxpayer to prove anything affirmatively until and unless the assessor first defends the new value.
The Indiana homestead designation is the single highest-value administrative status for a residential property. The cumulative tax-relief stack on a properly designated homestead:
For a typical $300,000 homestead in a $4.50/$100 jurisdiction, the cumulative effect is roughly $4,000-$5,000/year in tax relief vs the same property without homestead status.
Common dispute scenarios:
The successful appeal: file the homestead deduction application (Form HC10) for the current and prior years (up to the statute of limitations), present documentation of owner-occupancy (driver's license, voter registration, utility bills, tax returns showing the address as principal residence) at the informal conference. Most homestead-status disputes resolve at the informal conference with a Form 134 Joint Determination correcting the deduction.
The Circuit Breaker cap under IC 6-1.1-20.6 applies after deductions and before credits. The mechanic:
The pre-check before filing Form 130:
If a realistic value appeal (typically 10-25% reduction at most) wouldn't push you below the cap, the value appeal won't move the bill. In that situation, the higher-leverage moves are confirming homestead designation, applying for any missed deductions (Over 65, Disabled Veteran, mortgage prior to 2023), and ensuring the property record card factual data is correct.
For non-homestead residential and commercial properties, the 2% and 3% caps are higher and the pre-check matters less — most pre-credit liability falls below the 3% cap. The pre-check primarily affects homestead appeals.
| Program | Statute | Benefit | Eligibility | Application |
|---|---|---|---|---|
| Standard Homestead Deduction | IC 6-1.1-12-37 | $48,000 in 2025 pay 2026; phasing to $0 by 2030 under SEA 1 §44 | Owner-occupied principal residence in Indiana | Form HC10 with county auditor; must be filed by December 31 of the year preceding the tax year |
| Supplemental Homestead Deduction | IC 6-1.1-12-37.5 | 37.5% of AV ≤ $600K plus 25% of AV > $600K, applied after Standard Deduction; rising to 66.7% by 2030 under SEA 1 §45 | Eligible homestead with Standard Deduction | Automatic with Standard Homestead application |
| Supplemental Homestead Credit (NEW) | IC 6-1.1-20.6-7.7 | Lesser of 10% of property tax bill or $300 | Eligible homestead | Automatic — no application required |
| Over 65 Deduction | IC 6-1.1-12-9 | $14,000 AV deduction (lesser of $14,000 or one-half of AV) | Age 65+; principal residence; income $30K individual / $40K combined; 1+ year residency | Form 43708 (Senior Citizen Property Tax Benefits) with county auditor |
| Over 65 Circuit Breaker Credit | IC 6-1.1-20.6-8.5 | Caps annual property tax growth at 2% for qualifying seniors; AV cap removed by SEA 1; income limit raised to $60K individual / $70K couple | Age 65+; principal residence; meets income limit | Same Form 43708 application |
| Disabled Veterans — Service-Connected | IC 6-1.1-12-13 | $24,960 AV deduction (must have served honorable; total or partial disability) | Veteran totally disabled or 62+ with at least 10% disability; AV cap on property | Form 12662 / DD-214 documentation |
| Disabled Veterans — Wartime | IC 6-1.1-12-14 | $14,000 AV deduction (stackable with -13 in some cases) | Veteran with wartime service and at least 10% disability | Form 12662 / DD-214 documentation |
| Disabled Veterans — Specially Adapted Housing | IC 6-1.1-12-14.5 | Substantial deduction; check current statute | Veteran with specially adapted housing per VA | Form 12662 / VA documentation |
| Blind / Disabled Persons | IC 6-1.1-12-11 / -12 | $12,480 AV deduction | Legally blind OR disabled per Social Security; income limits | Form 43710 with county auditor |
| Mortgage Deduction | IC 6-1.1-12-1 (repealed) | REPEALED effective January 1, 2023 (HEA 1260 of 2022 §12); replaced by $3,000 increase to Standard Homestead Deduction | n/a | n/a — no longer available; Standard Deduction was raised from $45K to $48K to compensate |
| Geothermal / Solar / Wind | IC 6-1.1-12-26.2 et seq. | Deduction for qualifying renewable energy systems | Eligible installed system | Form 18865 / system documentation |
| Heritage Barn / Rehabilitated Property | IC 6-1.1-12-26.5 | Reduced assessment for qualifying barn or rehabilitated historic property | Property meets program criteria | Application to county auditor |
| Religious / Educational / Charitable Exemption | IC 6-1.1-10 | Full or partial property tax exemption | Property used for qualifying purpose | Form 136 (filed every other year) |
Action: file your homestead deduction application immediately upon purchase or upon any move between Indiana properties. Use Form HC10 with the county auditor. The cumulative homestead stack (Standard + Supplemental + 1% Circuit Breaker + Supplemental Credit) is the single highest-value administrative status for a residential property — typically $4,000-$5,000/year in tax relief on a $300,000 home in a higher-millage jurisdiction. The deadline is December 31 of the year preceding the tax year. Late applications can be accepted in some cases under the IC 6-1.1-12-37 statute-of-limitations provisions, but timely filing is essential.
SEA 1 of 2025 Standard Homestead Deduction phaseout. Under SEA 1 §44 (retroactively effective January 1, 2025), the Standard Homestead Deduction phases down from $48,000 in 2025 to $0 by 2030 (or 2031 depending on final implementation timing). The phaseout is partly offset by the Supplemental Homestead Deduction increase (37.5% in 2025 → 66.7% by 2030) and by the new Supplemental Homestead Credit. The net effect varies by property and jurisdiction; DLGF's June 2025 implementation memorandum projects most homeowners will see roughly stable or slightly lower bills through 2030 given the offsetting changes plus the Circuit Breaker cap. Verify your specific situation against your TS-1 tax bill each year — the post-2030 picture depends on continued legislative activity.
Mortgage Deduction repealed effective 2023. The Indiana Mortgage Deduction under IC 6-1.1-12-1 was repealed by HEA 1260 of 2022 §12, effective January 1, 2023. The deduction last applied to taxes payable in 2023 (for mortgages recorded prior to December 31, 2022). For taxes payable in 2024 and after, the mortgage deduction is not available. The General Assembly added $3,000 to the Standard Homestead Deduction to partially offset the repeal (raising it from $45,000 to $48,000 effective for assessment dates after December 31, 2022).
Marion County is the unified consolidated city-county of Indianapolis (the only county-equivalent unit organized as Unigov in Indiana). Nine townships — Center, Decatur, Franklin, Lawrence, Perry, Pike, Warren, Washington, Wayne — divide the county for assessment administration but the Marion County Assessor coordinates centrally. Marion's Center Township is one of the highest-millage jurisdictions in Indiana (often above $4.50/$100), making the 1% homestead Circuit Breaker cap binding for most owner-occupied homes.
County-specific note: Marion County's online property records are unusually complete — Assessor Property Cards and Beacon-equivalent search are both available. The 1% cap is binding for most Center Township homesteads; Pre-credit liability often exceeds the cap by 30-60%, meaning value appeals on these properties move the bill only when reductions are large enough to push pre-credit liability below the cap. Confirming homestead status and applicable deductions (Over 65, Disabled Veteran) is the higher-leverage move for capped properties.
Lake County encompasses the Northwest Indiana / Calumet Region with Gary, Hammond, East Chicago, Whiting, Crown Point, Merrillville, and Highland as principal communities. Industrial-legacy property values vary substantially by jurisdiction — Gary and East Chicago have depressed residential markets; Schererville, St. John, and Munster have higher-value suburban markets. Lake County retained its township assessors longer than most counties (after the 2008 consolidation), and assessment practice still varies by township.
County-specific note: Lake County's millage rates in older industrial cities (Gary, East Chicago, Hammond) are among the highest in Indiana, and the 1% homestead Circuit Breaker cap is binding for nearly all owner-occupied homes in those jurisdictions. The Lake assessor's office expects high appeal volume in years following major trending updates. PTABOA hearings are scheduled at the Lake County Government Center in Crown Point.
Allen County is anchored by Fort Wayne, the second-largest city in Indiana, with surrounding suburban communities (New Haven, Huntertown, Leo-Cedarville, Woodburn). The Allen County Assessor's Office in the Rousseau Centre downtown handles the 20-township assessment territory centrally. Allen's millage rates are moderate by Indiana standards — many homesteads are not at the 1% cap, making value appeals more directly bill-moving than in Marion or Lake.
County-specific note: Allen County's online Appeals page is unusually thorough — it explicitly documents the IC 6-1.1-15-1.1 June 15 deadline rule with both before-May-1 and after-April-30 scenarios. The Allen PTABOA process is straightforward; informal conferences resolve a high share of factual-error and value-evidence cases.
Hamilton County is Indiana's fastest-growing county, anchored by Carmel, Fishers, Noblesville, and Westfield. Substantial residential value appreciation during 2020-2024 has produced wide variation between long-tenured owners and recent purchasers. The Hamilton County Assessor coordinates assessment for nine townships; township assessors largely consolidated into the county after 2008.
County-specific note: Hamilton's appreciation rate makes the IC 6-1.1-15-20 5% burden-shift rule particularly relevant — many properties cross the 5% YoY threshold annually. Hamilton's millage rates are moderate to low (Carmel and Fishers in particular are below the state average), so the 1% homestead cap is less often binding than in Marion or Lake. Value appeals can directly reduce bills here. Recent purchasers should pay particular attention to whether their assessment exceeds their purchase price.
St. Joseph County is anchored by South Bend (University of Notre Dame) and Mishawaka. The St. Joseph County Assessor's Office in the County-City Building downtown handles the 13-township assessment territory. Substantial student-rental housing in close-to-Notre-Dame neighborhoods produces complex assessment patterns — owner-occupied vs investor-owned distinctions matter for homestead status.
County-specific note: South Bend's millage rates are moderate; the 1% cap is binding for some homesteads but not most. Owners near Notre Dame should specifically check their homestead designation — many properties transitioned between owner-occupied and rental during the 2020-2024 student-housing market shifts, and homestead designations sometimes don't update with the change in use.
Vanderburgh County is the southwestern Indiana population center anchored by Evansville. The Vanderburgh County Assessor's Office in the Civic Center Complex handles the eight-township assessment territory. Center Township (Evansville-core) has higher millage rates and more cap-binding homesteads; outlying townships (Knight, German, Scott) have lower rates.
County-specific note: Vanderburgh's online assessor portal at vanderburghassessor.org is comprehensive — property search, GIS mapping, and appeal forms are all accessible. The county's PTABOA documents inform taxpayers that Form 130 should be filed within 45 days of Form 11 — this references the pre-2017 procedure; the controlling rule under IC 6-1.1-15-1.1 (effective 7/1/2017) is the June 15 deadline. When in doubt, file by June 15 of the assessment year, which satisfies both the pre-2017 and current rules.
Tippecanoe County is anchored by Lafayette and West Lafayette (Purdue University). Substantial student-rental housing concentration in West Lafayette generates complex homestead-vs-rental assessment patterns. Lafayette's downtown and surrounding neighborhoods have moderate millage rates; West Lafayette's college-adjacent neighborhoods have higher rates.
County-specific note: Properties near Purdue often transition between owner-occupied (faculty, staff) and rental (student housing) — homestead status should be verified annually for properties in this transition zone. The 1% homestead cap is binding for many West Lafayette owner-occupied homes given local millage levels.
Porter County is in Northwest Indiana adjacent to Lake County, anchored by Valparaiso, Portage, and Chesterton. The Indiana Dunes National Park and Lake Michigan shoreline drive substantial second-home and vacation property activity in northern townships. The Porter County Assessor's Office at 155 Indiana Avenue in Valparaiso handles the 12-township assessment territory.
County-specific note: Porter's lakeshore properties face the unusual dynamic of high market values combined with second-home status (precluding homestead designation for that property). Owners with both an Indiana primary residence and a Porter County lakeshore second home should verify only one homestead is claimed across the portfolio. Porter's PTABOA process accepts filings in person, by mail, and via email.
Hendricks County is a fast-growing west-of-Indianapolis suburban county anchored by Danville, Avon, Plainfield, and Brownsburg. Substantial residential growth driven by Indianapolis-metro spillover. The Hendricks County Assessor's Office at 355 S Washington Street in Danville coordinates assessment for 12 townships.
County-specific note: Hendricks's growth rate produces frequent IC 6-1.1-15-20 5% burden-shift triggers. Recent purchasers should specifically check whether their assessment matches recent comparable sales; Hendricks assessor offices are generally responsive to documented purchase-price evidence within 6-12 months of January 1.
Johnson County is south of Indianapolis, anchored by Franklin, Greenwood, and Bargersville. Substantial recent residential growth along the Greenwood/I-65 corridor. The Johnson County Assessor's Office in the Courthouse Annex in Franklin coordinates assessment for nine townships; the PTABOA meets at 86 West Court Street in Franklin.
County-specific note: Johnson County publishes its appeal process at johnsoncounty.in.gov/topic — a useful reference for the procedural sequence (informal conference, PTABOA, IBTR). Greenwood's higher-density residential neighborhoods and the I-65 commercial corridor produce mixed residential/commercial property mix; classification disputes are a common appeal ground.
State-level developments:
Senate Enrolled Act 1 of 2025 (SEA 1) — signed into law April 2025, retroactively effective January 1, 2025. The most consequential property tax legislation since the 2010 Circuit Breaker amendment.
§44: Standard Homestead Deduction (IC 6-1.1-12-37) phases down from $48,000 (2025) to $0 by 2030. Net effect partially offset by §45.
Net statewide impact: Approximately $1.3 billion in property tax savings vs current law over the 2026-2030 transition period. DLGF projects two-thirds of Indiana homeowners will see a 2026 property tax bill lower than their 2025 bill.
DLGF June 2025 implementation memorandum (Cockerill memorandum, June 12, 2025) documents the SEA 1 implementation timeline and code list updates for county auditors.
Continued post-pandemic appreciation — Indiana's statewide assessed values rose approximately 12% in 2025 (per AribaTax / DLGF data). High-growth counties (Hamilton, Hendricks, Johnson, Hancock, Boone) experienced larger increases. The Circuit Breaker cap absorbed substantial portions of these increases for homesteads, but non-homestead and commercial properties saw bill increases proportional to AV growth.
Locality-specific patterns:
Marion-Center binding cap — substantial share of Marion County Center Township homesteads have pre-credit liability above the 1% cap; SEA 1 changes affect these properties primarily through the new $300 Supplemental Homestead Credit (which applies after the cap).
Hamilton-Carmel-Fishers appreciation — recent purchasers face uncapped assessments at or near purchase price; the IC 6-1.1-15-20 5% burden-shift rule is widely applicable but materially under-used.
Lake County industrial-legacy market variation — Gary and East Chicago face depressed residential markets but high millage rates (cap-binding); Schererville, St. John, and Munster face appreciating markets with lower cap-binding share.
West Lafayette / Purdue housing transitions — student-housing market shifts produce frequent homestead-status questions that should be reviewed annually.
Pending or prospective regrounding signals to watch:
The informal preliminary conference typically resolves within 30-60 days of Form 130 filing for cases where the assessor agrees with the taxpayer's evidence. If the dispute does not resolve at the informal level within 180 days, PTABOA must hold a hearing under IC 6-1.1-15-1.1; PTABOA gives at least 30 days notice of the hearing. Form 115 PTABOA determinations typically issue within 30-90 days after the hearing. IBTR small claims appeals run 6-12 months from Form 131 filing to final determination; IBTR full proceedings run 12-24 months. Indiana Tax Court adds 12-24 additional months for original tax appeals. Total potential timeline from Form 130 through Indiana Tax Court: 2-3 years. Most residential appeals resolve at the informal conference or PTABOA within 6-9 months.
The county auditor recalculates the assessment, deductions, and credits as ordered, and refunds the overpaid portion of any taxes already paid (with interest under IC 6-1.1-37 in some cases). The corrected value carries forward; the county assessor's records are updated; and the property record card reflects the new value going forward. If the appeal succeeded under the IC 6-1.1-15-20 burden-shift rule and the assessor failed to meet the burden, the value reverts to the prior year's assessment.
The original assessment stands and the original tax bill remains due. You may appeal the PTABOA Form 115 determination to the IBTR by filing Form 131 within 45 days of the Form 115 notification. After the IBTR final determination, you may file an original tax appeal with the Indiana Tax Court within 45 days. There is no monetary penalty for losing a residential appeal at PTABOA or IBTR (filing fees are $0 through IBTR; $120 at Tax Court). The principal cost of losing is the time invested.
The principal risk is time invested without value recovery. PTABOA has authority to raise an assessed value if evidence shows under-assessment, but the IC 6-1.1-15-20 5% burden-shift rule effectively discourages retaliatory raises (the assessor would have to defend any increase >5%). For owners at the Circuit Breaker cap, a value reduction may not move the bill at all — that's the second risk: pursuing an appeal that won't change your bill. The pre-check on whether your bill is at the cap is the discipline that separates valuable appeals from non-bill-moving appeals.
The Circuit Breaker cap under IC 6-1.1-20.6 and Article 10 §1 limits your property tax bill to 1% of gross assessed value (homestead), 2% (other residential, agricultural), or 3% (other property). When your local tax rate × net AV (after deductions) exceeds the cap, the cap is automatically applied as a credit reducing the bill to the cap amount. So you can have a high assessed value AND be at the cap — the cap is a function of gross AV and the cap percentage, not of the underlying tax rate. Look at your TS-1 tax bill: the "Property Tax Cap Credit" line shows the credit amount applied. If positive, you are at the cap.
Under IC 6-1.1-15-20, when your assessed value increases more than 5% over the prior year, the burden of proof in any appeal shifts to the assessing official — at PTABOA, IBTR, and Indiana Tax Court. To use the rule: (1) compute the year-over-year percentage change in your gross AV; (2) if greater than 5% AND not driven by substantial renovations, zoning changes, or use changes, the rule applies; (3) cite IC 6-1.1-15-20 explicitly in your Form 130 narrative; (4) at the informal conference and PTABOA hearing, request that the assessor present evidence first and demonstrate by preponderance that the new value is correct. If the assessor fails to meet the burden, the prior year's value is restored.
Not at the informal conference or PTABOA tier — the process is designed to be accessible to pro-se filers, particularly for residential property and factual-error cases. Most successful PTABOA appeals are filed by the property owner directly using property record card error documentation, comparable sales evidence, and photographs. At the IBTR tier, professional representation is recommended for non-trivial cases, particularly true-cash-value disputes that benefit from licensed appraiser evidence. Indiana attorneys can represent clients at all tiers; tax practitioners may represent at PTABOA and IBTR small claims.
For most Indiana value disputes, missing the IC 6-1.1-15-1.1 June 15 deadline forfeits the appeal for that tax year. There is no general grace period. Limited exceptions exist for: (a) factual record errors discoverable through correction of clerical errors under IC 6-1.1-15-12; (b) homestead and other deduction applications, which have separate deadlines under IC 6-1.1-12 (typically December 31 of the year preceding the tax year); (c) PTABOA-initiated reassessments under IC 6-1.1-9 in extraordinary circumstances. The general rule: file by June 15.
A recent arms-length purchase price is typically the strongest evidence of true tax value (market value-in-use) at the informal conference and PTABOA if the purchase was within roughly 6-12 months of the January 1 assessment date. Indiana courts and the IBTR treat recent purchase prices as strong evidence — though not dispositive. The Sales Disclosure Form (SDF) submitted at closing is part of the assessor's record; pulling your SDF and comparing the recorded sale price to the current assessment is the first step. If your assessment exceeds your recent purchase price by more than market drift since closing, you have a strong case.
The Standard Homestead Deduction under IC 6-1.1-12-37 is a $48,000 (2025) AV reduction for owner-occupied principal residences. Combined with the Supplemental Homestead Deduction (IC 6-1.1-12-37.5), the 1% Circuit Breaker cap (vs 2% or 3% for non-homestead), and the new Supplemental Homestead Credit (IC 6-1.1-20.6-7.7), the cumulative homestead stack saves $4,000-$5,000/year for a typical $300,000 Indiana home in a higher-millage jurisdiction. To claim: file Form HC10 with your county auditor by December 31 of the year preceding the tax year. Late applications can be processed in some cases; consult your county auditor.
The Indiana service-company landscape clusters around Indianapolis (serving Marion, Hamilton, Hendricks, Johnson), Northwest Indiana (Lake, Porter), Fort Wayne (Allen, surrounding counties), South Bend (St. Joseph), and Evansville (Vanderburgh and surrounding). Local Indiana firms — typically small law practices with property-tax practice groups, real-estate-affiliated tax-consulting practices, or specialized property-tax shops — generally operate on contingency at 25-40% of first-year tax savings, sometimes with a small flat-fee component for the PTABOA hearing ($300-$800).
The principal value of professional representation in Indiana is at the IBTR tier, particularly for:
At the PTABOA tier, the value differential between professional and pro-se representation is materially smaller — particularly for residential property where the appeal grounds are documented factual error, recent purchase-price evidence, or homestead-status restoration.
For Indiana property owners considering appeals, the discipline that matters most is the Circuit Breaker pre-check: confirm whether your bill is currently at the 1%/2%/3% cap before filing Form 130. If the cap is binding, modest assessment reductions won't move the bill — and the time investment in pursuing a value appeal is better spent on confirming homestead status, applying for missed deductions (Over 65, Disabled Veteran), and reviewing the property record card for factual errors.
For cross-state comparison of professional-vs-DIY economics, escalation paths, and contingency-rate negotiation strategy, see the property tax service companies topic explainer.
Indiana Code Title 6 Article 1.1 (Property Taxes):
Indiana Code Title 6 Article 1.5 (Indiana Board of Tax Review):
Indiana Code Title 33 (Courts):
Constitutional authority:
Administrative authority:
County-level sources verified for the 10 jurisdictions documented in §8:
Methodology callout: The pattern analysis in §6 is built from the Indiana Board of Tax Review's published final determinations, Indiana Tax Court opinions reviewing IBTR determinations, the statutory framework under IC 6-1.1-15 and IC 6-1.1-20.6, the constitutional Circuit Breaker architecture under Article 10 §1, and the structural mechanics of Indiana's annual-trending plus four-year-cyclical reassessment system under IC 6-1.1-4-4.2 and -4.5. The §6 corpus is statutory-and-administrative supplemented by published IBTR decisional patterns rather than docket-by-docket reading. A targeted IBTR final-determination analysis layer is planned for a future update once a representative recent sample is curated.
Disclaimer. This guide describes the Indiana property tax appeal system in general terms. It is not legal advice and is not a recommendation about whether to appeal any specific assessment. Property tax appeals involve county-specific procedures, deadlines that may vary by Form 11 mailing date, and evidentiary requirements that depend on the specific facts of each property. The Circuit Breaker cap mechanics, deduction stacking, and post-SEA 1 transition rules can produce non-obvious results in specific cases. Statutory citations and dollar amounts are accurate as of this guide's review date but are subject to legislative revision and rule-making — particularly during the 2025-2030 SEA 1 transition period. Verify current-year information directly with your county assessor, the DLGF, the Indiana Board of Tax Review, or qualified Indiana counsel before relying on it for an appeal filing.
— The Property Tax Desk Editorial Team · Last reviewed May 2026 · Email: editor@propertytaxdesk.com