New York · Do-it-yourself · $29

Appeal your New York property taxes yourself.

Everything you need to grieve your New York assessment yourself: how to find YOUR municipality's real Grievance Day, the equalization-rate math that wins unequal-assessment claims, Form RP-524, and a ready-to-edit complaint. Includes the separate New York City and Nassau County processes.

Straight talk: we don’t have per-home comparable-sales data for New York — New York's statewide assessment roll ships without living-area square footage, so there is no reliable way to size-adjust a comparable set from it. So this is a guide and templates, not a comp report, and you pull your own comps — the kit shows you how to organize them.That’s the honest reason it’s $29 instead of the $49 done-for-you kit we sell in states we cover.
The New York DIY Appeal Kit
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How a New York appeal works

The short version, free. The paid kit adds the evidence workbook, filing controls, and editable letter.

  1. New York calls it a grievance. It is free, needs no lawyer, and runs at the municipal level on Form RP-524.
  2. Grievance Day is the fourth Tuesday in May in MOST towns, but Westchester is the third Tuesday in June, Suffolk the third Tuesday in May, and villages that assess are typically the third Tuesday in February. Confirm yours with your assessor.
  3. New York City (March 15 Class One / March 1 others, NYC Tax Commission) and Nassau County (March 1, ARC) do not use this process at all.
  4. Most homeowners win on unequal assessment: your assessment ÷ your municipality's level of assessment is the assessor's implied market value. Beat that with comparable sales.

What to check on your assessment notice

  • Your TOTAL assessed value on the tentative roll. You cannot grieve the land value by itself.
  • Your municipality's level of assessment. Take the LOWEST of the equalization rate, the residential assessment ratio (RAR), and the uniform percentage of value printed on the roll.
  • Your Grievance Day. It is not a statewide date and the fourth-Tuesday-in-May rule is wrong in a lot of New York.
  • The reduction you intend to request. Asking too little can bar you from getting more later.

Official lookup: NYS municipal profiles: your assessor, equalization rate, and RAR →

What’s inside

✓A plain-English New York grievance walkthrough, from tentative roll to Board of Assessment Review.
✓How to find YOUR municipality's Grievance Day, with every published exception (Westchester, Suffolk, villages, shared-assessor towns, cities).
✓Dedicated sections for New York City (Tax Commission, March 15 / March 1, TC108 and TC101) and Nassau County (ARC and AROW, March 1): different agencies, forms, and deadlines.
✓The equalization rate and RAR arithmetic for an unequal-assessment claim, worked through with the state's own example.
✓How to complete each part of Form RP-524, including the grounds options and the reduction-amount trap.
✓An evidence checklist built on what the state says actually supports a residential case.
✓A ready-to-edit complaint citing the right Real Property Tax Law sections.
✓What comes next: stipulations, the BAR hearing, SCAR eligibility, and the 30-day judicial-review clock.

How it works

  1. Buy the kit — the PDF lands in your inbox instantly.
  2. Confirm YOUR municipality's Grievance Day with your assessor before anything else. It is the fourth Tuesday in May in most towns, but Westchester, Suffolk, villages, New York City, and Nassau County all differ.
  3. Gather the evidence on the checklist and edit the appeal-letter template.
  4. File the current instrument required by your assessor or Board of Assessment Review (or the NYC Tax Commission / Nassau County ARC, see below) before your deadline.

Different process where you live?

New York is not one system. These jurisdictions use a different agency, a different form, and an earlier deadline than the rest of the state. The kit covers each one in its own section.

New York City
All property in the five boroughs (Manhattan, Bronx, Brooklyn, Queens, Staten Island). If your property is in NYC, everything above about Grievance Day and the Board of Assessment Review does NOT apply to you.
Deadline
March 15 for Class One property (most one, two, and three family homes) and March 1 for Classes Two, Three, and Four. These dates are set by the City Charter and, in the Tax Commission's own words, cannot be waived or extended for any reason. When the date falls on a weekend or holiday it moves to the next business day, so confirm the exact date for the current year before you file.
Filed with
The New York City Tax Commission, an independent agency, under NYC Charter chapter 7. Phone 212-669-4410. (The Department of Finance sets the assessment; the Tax Commission reviews it.)
Form
Form TC108 for Class One property of all types, including Class One condominiums. Form TC101 for Class Two or Class Four property except condominiums.
Nassau County
All property in Nassau County. Nassau runs a county-wide assessment review system, so the town-level Grievance Day process described above does not apply to you.
Deadline
March 1 is the statutory date, and the filing window opens in early January. But ARC has repeatedly EXTENDED it. Recent years have run to the first business day of March, and the 2026 window was extended to March 31. Never assume the extension will be granted, and never assume it will not: confirm the current year's actual closing date with ARC before you file.
Filed with
The Nassau County Assessment Review Commission (ARC), which meets throughout the year. Phone 516-571-2391.
Form
An application to ARC, filed online through AROW (Assessment Review on the Web) or on ARC's own paper form. Not Form RP-524.
Deadline: There is no single New York deadline, and this is the part people get wrong. In most communities Grievance Day is the FOURTH TUESDAY IN MAY, and Form RP-524 must be RECEIVED by the assessor or Board of Assessment Review by that day. Mailing it that morning is not enough. The published exceptions: cities and towns that share an assessor may adopt any Grievance Day between the fourth Tuesday in May and the second Tuesday in June; Suffolk County town boards meet the third Tuesday in May; WESTCHESTER County town boards meet the THIRD TUESDAY IN JUNE; villages that assess property typically meet the third Tuesday in February, though dates vary; other cities vary and you must ask your assessor or city clerk. New York City requires filing by March 15 for Class One property and March 1 for all other classes, through the NYC Tax Commission. Nassau County requires filing by March 1, through the Assessment Review Commission. Only the assessment on the CURRENT tentative roll can be grieved (the tentative roll is completed May 1 in most communities), and missing your date costs you both administrative and judicial review for that year. Confirm your date with your assessor. It is one phone call and it is the whole appeal.

What New York charges to file

These are your county or state’s fees, not ours. Listed so there are no surprises.

  • Grievance before the Board of Assessment Review: no fee.
  • Small Claims Assessment Review (SCAR), after the BAR: $30.
  • Nassau County Assessment Review Commission: no fee.
  • NYC Tax Commission: no fee for most homes, but $175 where the assessed value on the Notice of Property Value is $2,000,000 or more.

Questions

Why is this $29 and not $49?
The $49 audit includes parcel-specific comparable analysis. This $29 kit is the state process guide, filing materials, evidence checklist, and appeal-letter template; you gather the property evidence yourself.
When is the New York property tax appeal deadline?
There is no single New York deadline, and this is the part people get wrong. In most communities Grievance Day is the FOURTH TUESDAY IN MAY, and Form RP-524 must be RECEIVED by the assessor or Board of Assessment Review by that day. Mailing it that morning is not enough. The published exceptions: cities and towns that share an assessor may adopt any Grievance Day between the fourth Tuesday in May and the second Tuesday in June; Suffolk County town boards meet the third Tuesday in May; WESTCHESTER County town boards meet the THIRD TUESDAY IN JUNE; villages that assess property typically meet the third Tuesday in February, though dates vary; other cities vary and you must ask your assessor or city clerk. New York City requires filing by March 15 for Class One property and March 1 for all other classes, through the NYC Tax Commission. Nassau County requires filing by March 1, through the Assessment Review Commission. Only the assessment on the CURRENT tentative roll can be grieved (the tentative roll is completed May 1 in most communities), and missing your date costs you both administrative and judicial review for that year. Confirm your date with your assessor. It is one phone call and it is the whole appeal.
What form do I file to appeal my New York property assessment?
Form RP-524 (Complaint on Real Property Assessment), filed with your assessor or Board of Assessment Review (or the NYC Tax Commission / Nassau County ARC, see below). The kit explains the filing steps and includes a ready-to-edit appeal letter.
Do you file the appeal for me?
No — this is a do-it-yourself product. You file with your assessor or Board of Assessment Review (or the NYC Tax Commission / Nassau County ARC, see below). The kit provides the preparation workflow, evidence organizer, filing checks, and ready-to-edit letter.
What if it doesn't help?
30-day money-back guarantee, no questions asked. If the kit isn't useful, reply to your delivery email and we'll refund you.
Is this legal or tax advice?
No. It's general information to help you file your own appeal. Always rely on the date and instructions printed on your own assessment notice and confirm current requirements with your county.
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