Two homeowners win the same appeal. Both knock their assessor’s noticed value down from $580,000 to $510,000. One lives in Bergen County, New Jersey. The other lives in Hennepin County, Minnesota. The cash benefit in year one looks identical — roughly $1,500 in tax saved. Then year two arrives.
In Bergen, the assessor cannot raise the assessment for the next two tax years absent a municipal-wide revaluation or a physical change to the property. The $1,500 compounds: $4,500 in protected savings before the freeze expires. In Hennepin, the assessor is statutorily obligated to reassess every parcel every year at January-1 market value. If market evidence supports it, the $510,000 number can be back up at $580,000 on next year’s notice — and the $1,500 saved in year one is the only money the appeal ever produced.
Same appeal. Same procedural win. Two completely different durability profiles. Three states have statutory carryforward that turns a year-one win into multi-year protection. Six don’t. Knowing which kind of state you’re in determines whether the appeal was a transaction or an annual chore.
The mental model most homeowners bring to a property tax appeal is litigation-adjacent: you win, the win sticks, and you move on. That model is correct in a minority of jurisdictions. In most of the country, a successful appeal lowers the assessment for the specific tax year(s) under appeal, and the assessor returns to the property the following January with fresh market data and no obligation to honor the prior reduction.
The variable that determines which world you’re in is not the strength of your case or the size of the reduction — it’s the statute that governs how decisions of the appellate body interact with subsequent assessments. Three states have written explicit carryforward into the property tax code. The rest haven’t. The distinction matters enough that it should shape how you frame your appeal in the first place: whether you file at a particular venue (judicial vs. administrative), whether you accept a settlement or push to adjudication, and how you evaluate a service company’s fee structure.
New Jersey’s Freeze Act is the most widely-known statutory carryforward in U.S. property tax practice. A final judgment by a County Tax Board (under NJSA 54:3-26) or by the New Jersey Tax Court (under NJSA 54:51A-8) binds the municipality for the assessment year of the appeal plus the next two succeeding tax years. The assessor cannot increase the assessment during the freeze period absent specific exceptions.
The exceptions are narrow: a municipal-wide revaluation or reassessment program, physical changes to the property (additions, renovations, demolitions), a change in zoning that materially affects value, or the discovery of a clerical error in the original record. Market appreciation alone does not break the freeze. If your municipality is not revaluing and your property hasn’t physically changed, a successful appeal in Bergen, Essex, Morris, or Monmouth County produces three years of locked assessment value at the post-appeal number.
That structural reality is why New Jersey homeowners can rationally pay a 40-50% contingency fee on a single appeal and still come out ahead: the contingency is calculated on year-one savings, but the cash benefit compounds across two additional years that the contract is not pricing.
New York’s carryforward is materially different from New Jersey’s in one respect: it only attaches to judicial determinations under Article 7 of the Real Property Tax Law. A successful Board of Assessment Review (BAR) grievance is year-specific. A successful Small Claims Assessment Review (SCAR) petition is year-specific. The three-year freeze under RPTL §727 applies only after the matter has been adjudicated by the Supreme Court in an Article 7 proceeding.
The implication for filing strategy: in jurisdictions where BAR or SCAR is the natural first stop, a homeowner who wants the carryforward protection must be willing to escalate to Article 7. That means lawyer-led representation in most cases, court filing fees, and a multi-month timeline. Whether the protection is worth the procedural overhead depends on the size of the reduction, the local tax rate, and the homeowner’s assessment of future market trajectory. For a $1.5M Westchester home with a 3% effective rate and a meaningful reduction in play, the math often favors Article 7. For a $400K Albany County home with a $50 reduction at stake, BAR/SCAR alone is the rational stopping point.
The same exceptions apply: revaluation, physical change, zoning shift. A sale to a new owner during the freeze period also resets exposure. The freeze runs for the next three assessment rolls following the corrected one.
Pennsylvania’s carryforward mechanism is structurally distinct from the New Jersey and New York models. Rather than fixing a number of years, 53 Pa.C.S.A. §8855 provides that after a successful appeal, the new assessment remains in effect for the remainder of the county’s predetermined assessment cycle, subject to the same revaluation and physical-change exceptions.
The catch — and it’s a meaningful one — is that Pennsylvania counties don’t reassess on a uniform schedule. Some counties haven’t reassessed since the 1990s. Others have just completed a cycle and won’t open another for a decade. The practical durability of a Pennsylvania appeal can range from two years to fifteen depending on the county’s last-reassessment date and posture toward future reassessment. A successful appeal in Allegheny County in 2026, given the county’s ongoing reassessment posture, may produce shorter carryforward than the same appeal in a county that has not reassessed since the Clinton administration.
The exception structure works the way it does in New Jersey and New York: a county-wide reassessment ends the carryforward, physical changes do, zoning changes do. Market appreciation by itself does not, which is the load-bearing protection.
The remaining states in the launch portfolio handle appeal decisions as year-specific events. There is no statutory mechanism that prevents the assessor from returning the following year with a fresh market analysis and a different number. The mechanics vary, but the bottom line is the same: a year-one win is, statutorily, a year-one win.
California is the cleanest example of year-specific treatment because Prop 8 reductions are explicitly defined as temporary decline-in-value adjustments under California Revenue and Taxation Code §51(a)(2). The assessor is required to review the property’s market value every January 1. If conditions have improved, the assessed value can be restored — up to but not exceeding the factored base year value (the original Prop 13 acquisition value adjusted by 2% per year).
The asymmetric ceiling matters: a Prop 8 reduction can’t evaporate the Prop 13 protection underneath it. The post-Prop-8 restoration is capped at the factored base year value, which for long-held properties can be far below current market. But the Prop 8 reduction itself is annually reviewable, and in a recovering market the homeowner who won a Prop 8 appeal in 2025 may see the assessed value walk back up in 2026, 2027, and 2028 as the assessor restores year by year.
Texas Tax Code §23.01 requires appraisal districts to determine a property’s market value as of January 1 each year. Texas Tax Code §41.47 confirms that ARB orders are binding only for the year that was protested. There is no statutory carryforward. A homeowner who successfully protests a 2026 Harris County value to $510,000 will see the 2027 notice arrive based on the district’s independent 2027 January-1 analysis, which may or may not honor the prior reduction.
The structural offset in Texas is the 10% Homestead Cap. The cap doesn’t prevent the assessor from raising the market value year over year — it caps the rate at which the assessed value can grow for tax purposes. So a market-value re-raise in year two is constrained by the cap if the property is homesteaded, but the underlying market value can still climb, and the cap is annual. The protest itself remains a single-year event.
The four remaining year-specific states track Texas more than they track California, in the sense that there is no statutory carryforward at all:
The natural follow-up question: even where statute doesn’t require carryforward, do assessors customarily honor a prior reduction out of professional convention or risk-aversion?
The answer, supported by the practice standards of the International Association of Assessing Officers and by the day-to-day administrative reality of mass appraisal, is mostly no. Assessors in non-freeze states are operating from mass-appraisal models that compute estimated market value from the current year’s sales data, current year’s cost data, and current year’s income data (for commercial). A prior-year ARB or BoR reduction is, at most, a flag for the assessor to examine the property more closely. It is not a constraint on the model output.
In rapidly appreciating markets — Austin, Tampa, Phoenix, parts of the Atlanta metro — the practical experience of appellants is that successful reductions in year one are often partly or wholly recaptured by the next assessment. The reduction was correct given that year’s evidence. The next year’s evidence is different. The assessor isn’t penalizing the appellant; the model is rerunning. In stable or declining markets, the prior reduction is more likely to hold by default — not because of any convention, but because the new market evidence supports a value close to the prior reduced number.
The upshot for appellants in non-freeze states: budget for the possibility of needing to appeal again in year two, particularly if the market is trending up. The cost of preparing the second appeal is usually lower than the first because the comp work and the property record can be reused. But the appeal itself is a fresh proceeding.
A peculiarity worth understanding if you’re practicing in New Jersey: the Freeze Act applies not only to adjudicated judgments but also to settlements. The Tax Court’s standard Stipulation of Settlement form (Form 10337) contains an explicit checkbox indicating whether the Freeze Act will apply to the resulting judgment. If the parties don’t affirmatively waive it, the freeze runs by default.
That detail matters because most New Jersey property tax matters resolve by settlement, not by trial. A homeowner or counsel who isn’t paying attention to the Freeze Act checkbox during the settlement-conference phase may end up surrendering the carryforward protection — either inadvertently or because the municipality’s counsel asked for it as a settlement term and it was conceded without resistance. Conversely, a homeowner who explicitly preserves the Freeze Act in the stipulation gets the same statutory protection as if the matter had been adjudicated.
New York’s RPTL §727 freeze, by contrast, requires an actual judicial determination in an Article 7 proceeding. A settled SCAR matter or a settled BAR grievance does not produce §727 carryforward, regardless of how it’s drafted. The mechanism is purely judicial. Pennsylvania’s §8855 carryforward attaches to the new assessment value itself rather than to the procedural posture, so settlement vs. adjudication is less load-bearing there.
Service company contracts are typically agnostic about state-by-state carryforward. The same 40-50% contingency rate is offered nationwide. But the economic outcome of paying that rate is profoundly different in a Freeze Act state than in a Texas or Minnesota engagement.
In New Jersey, a 40% contingency on a $1,500 year-one tax saving costs the homeowner $600. The carryforward produces an additional $3,000 of protected savings in years two and three that the contract does not bill against. The effective rate against total realized savings is closer to 13%.
In Texas or Minnesota, the same 40% contingency on the same $1,500 saving costs the same $600. There is no statutory carryforward. If the next year’s reassessment recaptures the reduction, the effective rate is 40% on the only saving the appeal produced. If the reduction holds informally for a year, the effective rate is closer to 20%. If it holds for two years, 13%. The customer is buying a probability distribution over outcomes, not a fixed multi-year benefit.
This is where contracts that bill on “projected multi-year savings” get especially fraught in non-freeze states. The vendor’s projection assumes the year-one value holds for three to five years. The statutory machinery doesn’t guarantee that outside NJ, NY, and PA. The homeowner is being asked to pay today for savings the model assumes will materialize but the law doesn’t enforce. Reading the contract for the savings basis is one defense; understanding the underlying state’s carryforward regime is the other. The four methods used to calculate contingency fees become much sharper questions in a non-freeze jurisdiction.
Whether you’re hiring a service company or representing yourself, the carryforward question shapes several practical decisions:
The appeal savings estimator on this site builds the state-specific carryforward period into its multi-year projection — so the savings number for a New Jersey appeal accumulates across three tax years while the savings number for a Minnesota or Texas appeal models a single year unless the homeowner indicates a multi-year hold expectation.