Grievance Day New York 2026 — Every County, Every Deadline
Once a year, every New York State homeowner has the legal right to formally challenge their property tax assessment before the Board of Assessment Review. The deadline is called Grievance Day — and most homeowners have never heard of it. This is the complete guide for Western and Central New York, from Syracuse to Erie County.
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For most New York State towns and cities, Grievance Day 2026 is Tuesday, May 26, 2026 — the fourth Tuesday of May per RPTL §512. Some municipalities have adopted alternate dates by local law. Across the Western and Central New York corridor from Syracuse to Buffalo, the standard May 26 date applies to most Erie, Niagara, Monroe, Ontario, Wayne, Cayuga, Onondaga, and surrounding county towns. Always confirm your specific municipality’s date with your local assessor before filing. The filing instrument is Form RP-524, available free at tax.ny.gov.
What Is Grievance Day — and Why It Matters
Grievance Day is the one day per year when New York State property owners can formally challenge their property tax assessment before the local Board of Assessment Review (BAR). It is not a day to dispute your tax rate — it is specifically for challenging the assessed value of your property. If that assessed value is higher than what your property would actually sell for in today’s market, the formal grievance process is your legal mechanism to correct it.
The process is free. No attorney required. No filing fee at the BAR stage. Any property owner in New York State can file.
New York Real Property Tax Law §512 establishes Grievance Day as the fourth Tuesday of May for most assessing units statewide. In 2026 that is May 26. Municipalities may adopt alternate dates under RPTL §512(1-a) when an assessor serves multiple units. A list of alternate-date municipalities is maintained at tax.ny.gov →. Cities often differ from the surrounding towns — always confirm with the city assessor or city clerk separately.
Grievance Day 2026 by County — Western & Central New York
The table below covers the full corridor from Onondaga County (Syracuse) west to Erie County (Buffalo). Important: city dates within each county may differ from the surrounding towns. The city date is set separately — always call your city assessor or city clerk to confirm.
| County | Major City / Area | 2026 Date (Towns) | Notes & Confirmation |
|---|---|---|---|
| Onondaga | Syracuse | May 26, 2026 | Standard RPTL §512. Confirm City of Syracuse assessor separately: (315) 448-8310. |
| Cayuga | Auburn | May 26, 2026 | Standard. Confirm City of Auburn assessor separately. |
| Seneca | Waterloo / Ovid | May 26, 2026 | Standard. Small rural county — all towns follow RPTL §512. |
| Wayne | Lyons / Newark | May 26, 2026 | Standard. Confirm Village of Newark assessor if applicable. |
| Ontario | Canandaigua | May 26, 2026 | Standard. Finger Lakes county — confirm City of Canandaigua separately. |
| Livingston | Geneseo | May 26, 2026 | Standard. Rural county — confirm Village of Geneseo if applicable. |
| Wyoming | Warsaw | May 26, 2026 | Standard. Fully rural — all towns follow RPTL §512. |
| Genesee | Batavia | May 28, 2026 ⚠ | Confirmed alternate date. City of Batavia adopted a different Grievance Day. Verify with Batavia City Assessor: (585) 345-6340. |
| Orleans | Albion | May 26, 2026 | Standard. Small rural county — all towns follow RPTL §512. |
| Monroe | Rochester | May 26, 2026 | Standard for towns. Confirm City of Rochester assessor separately: (585) 428-7221. |
| Niagara | Niagara Falls / Lockport | May 26, 2026 | Standard. Confirm City of Niagara Falls and City of Lockport separately. |
| Erie | Buffalo / WNY | May 26, 2026 | Confirmed. Town of Amherst confirmed May 26. NCB serves all Erie County towns. Erie County RPTS: (716) 858-8333. |
⚠ Alternate date confirmed via City of Batavia public notice April 2026. All other dates reflect the standard RPTL §512 fourth Tuesday of May. Verify your specific municipality before filing — never rely solely on the county date for a city property.
Grievance Day 2026 — County-by-County Resource Center
Each county page covers the local date, filing process, Board of Assessment Review contacts, SCAR deadlines, and the full pivot to cash sale options for homeowners whose taxes have gone past the point a one-day hearing can fix.
The Filing Process — Same Statewide
The grievance process is identical across all New York counties. The form, the grounds, the BAR hearing, and the SCAR appeal path are all governed by state law. What differs county to county is the specific date, the local assessor contact, and the SCAR filing location.
The official NYS instrument for challenging your assessment. Free from your local assessor or at tax.ny.gov →. Must be received by your local Board of Assessment Review by Grievance Day — not just postmarked. File in the municipality where the property is located.
Overvaluation — assessed value exceeds market value at the equalization rate. Most common ground.
Unequal Assessment — your property is taxed at a higher percentage than comparable properties in the same municipality.
Improper Assessment — legal error: exempt property taxed, wrong classification, or procedural error.
If the BAR determination is unsatisfactory, most residential property owners may file a SCAR petition in New York Supreme Court — no attorney required. Must be filed within 30 days of the final assessment roll. For Erie County: Erie County Clerk, 25 Delaware Ave, Buffalo NY 14202 · deadline July 30. Confirm your county’s SCAR filing location and deadline with your local court.
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Grievance Day New York State 2026 — FAQ
When is Grievance Day in New York State in 2026?
For most New York State towns, Grievance Day 2026 is Tuesday, May 26, 2026 — the fourth Tuesday of May per RPTL §512. Cities often have different dates set by local law. Always confirm your specific municipality’s Grievance Day with your local assessor or city clerk before filing. The New York State Tax Department maintains a list of municipalities with alternate dates at tax.ny.gov →
Is Grievance Day the same date in every New York county?
For most towns statewide, yes — the fourth Tuesday of May. But cities within counties often differ, and some towns have adopted alternate dates by local law. In the Western and Central NY corridor, most towns follow May 26, 2026. The confirmed exception in this region is the City of Batavia in Genesee County, which has adopted May 28, 2026. Always call your local assessor to confirm before relying on the county-wide date.
What form do I need to file a property tax grievance in New York?
Form RP-524, the Complaint on Real Property Assessment. Free from your local town assessor or as a PDF at tax.ny.gov. Must be received by your Board of Assessment Review by Grievance Day — not just postmarked. File in the municipality where the property is located. If your property is in a village that assesses separately, you may need to file two forms — one with the town and one with the village.
What evidence do I need for a successful property tax grievance?
The most persuasive evidence: a recent appraisal by a licensed NYS appraiser showing market value below your assessed value (adjusted for equalization rate). Alternatively, three or more comparable recent sales of similar properties in your neighborhood that sold below what your assessment implies. Condition documentation — inspection reports, contractor estimates for structural issues — may also support a reduction. The more specific and local your evidence, the stronger the case.
What if the Board of Assessment Review denies my grievance?
You may pursue SCAR (Small Claims Assessment Review) — a simplified Supreme Court process for most residential property owners, no attorney required. Must be filed within 30 days of the final assessment roll publication. Location and deadline vary by county — confirm with your county clerk. For more complex cases, an Article 7 tax certiorari proceeding with an attorney is also available within the same window.
What if my Erie or Niagara County taxes are too far behind for a grievance to help?
A grievance only reduces future tax bills — it doesn’t eliminate back taxes already owed. If significant delinquency has accrued, NCB can often provide a cleaner resolution: we buy Erie and Niagara County properties at any stage of tax delinquency, pay all back taxes at closing, and close in 7–21 days. See delinquent tax options → or call (716) 557-7005.
Grievance Day & Property Tax — Full Resource Network
Nickel City Buyers — Grievance Day New York State 2026 — WNY & CNY Property Tax Resource — Cash Buyer Since 2013
Nickel City Buyers, LLC buys homes from Erie and Niagara County homeowners at any stage of property tax delinquency. All back taxes, penalties, and interest paid at closing. 3842 Harlem Rd STE 400-339, Cheektowaga, NY 14215 · (716) 557-7005 · A+ BBB · 5.0 Google · 33 reviews · 300+ WNY homes since 2013. Standard NY Grievance Day 2026: Tuesday May 26, 2026 (fourth Tuesday of May per RPTL §512). Confirmed alternate: City of Batavia May 28, 2026. Erie County RPTS: www2.erie.gov/ecrpts · (716) 858-8333 · 95 Franklin St Buffalo NY 14202. Form RP-524: tax.ny.gov. RPTL §512: tax.ny.gov. Serving Buffalo, Cheektowaga, Amherst, Tonawanda, West Seneca, Lackawanna, Hamburg, Orchard Park, Kenmore, Depew, Lancaster, Williamsville, East Aurora, Clarence, Grand Island, Niagara Falls, Lockport, North Tonawanda, Lewiston, Youngstown, and all of Erie and Niagara County.
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Every New York homeowner has the right to challenge their assessment. File your grievance before May 26 — or if taxes have gone too far, NCB settles everything at closing for Erie & Niagara County homeowners. Cash offer in 24 hours. A+ BBB since 2013.
Explore all our guides: Erie County Grievance Day → · How to File RP-524 → · Full Financial Distress Resource Center →