The bill you can
argue with
Property tax is the rare carrying cost with an appeals process. New York publishes your assessment each January — and gives you weeks to disagree before the number locks for the year.
Before you read on
- General information as of August 2026; deadlines and procedures are the Tax Commission's to set — verify each cycle.
- Not legal or tax advice.
- The calendar is unforgiving: miss March, lose the year. Section 2.
Point 1How the number is built
Each January the city publishes a tentative assessment for every property. Condos and co-ops are valued by statute on a comparable-rental basis — the city imputes income to the building as if rented — then assessment ratios and caps translate value into taxable assessment, and the rate produces the bill. Multiple estimation steps means multiple places the number can drift from reality.
Condo owners pay the bill directly, so errors land on you personally. Co-op shareholders pay through maintenance, and appeals run at the building level — worth asking your board whether it protests annually, because well-run buildings do.
Point 2The calendar that decides everything
The structural point: the appeal window opens before most owners look at their bills. By the time the July bill hurts, the protest deadline passed four months earlier. Owners who check the tentative roll each January — five minutes on the Finance Department's site — keep the option; everyone else donates it.
| Moment | What happens |
|---|---|
| Mid-January | Tentative roll published; your new assessment is visible |
| January – March 1 | Window to protest (March 15 for small homes); after this, the year is locked |
| Spring – summer | Tax Commission reviews; hearings or offers follow |
| Late May | Final roll; July bills reflect any relief won |
Approximate NYC cycle. The Tax Commission's published deadlines control.
Point 3When an appeal is worth it
The practical tests: your market value assumption is visibly above what comparable units trade or rent for; your assessment rose sharply against flat comparables; or the physical description the city holds — square footage, unit count — is simply wrong. Any of these supports a protest; certiorari counsel typically takes larger cases on contingency, and condo buildings often file jointly.
Small distortions are usually not worth individual legal spend, but cost nothing to protest through the standard forms. The asymmetry favors filing: the downside is a rejected application, the upside compounds every year the corrected assessment carries forward.
Point 4For owners abroad
Nothing in the process requires presence — representatives file, hearings are handled by counsel, and refunds credit the account. What absence does threaten is the calendar: an owner who never sees the January roll never protests. Put the check in your manager's January duties or your own recurring calendar.
Also confirm the bill's mechanics annually: exemptions and abatements drop off when eligibility lapses, and payment failures from a closed account generate penalties silently. The appeal is one January task in a three-item checklist — assessment, exemptions, autopay.
If the assessment overstates value or misdescribes the property, yes — the Tax Commission process exists for exactly that, and buildings win relief every cycle. The option expires with the March deadline each year.
Protests are generally due March 1 (March 15 for class 1 small homes) against the tentative roll published in January. Missing it locks the assessment for the tax year.
By statute, on an income basis — the city imputes rental value to the building rather than using sale prices. The translation steps create the drift that appeals correct.
No — the co-op corporation appeals for the building, and relief flows through maintenance. Ask whether your board protests annually; the good ones treat it as routine.
Standard protests cost nothing to file yourself; certiorari counsel usually works on contingency against tax saved, and condo associations frequently file jointly to spread the effort.
The commission reviews the assessment you protest; the practical risk of an increase from filing is minimal, which is why the asymmetry favors protesting genuine errors.
RELATED GUIDES
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Send us your address and we will check the current assessment against comparables and tell you whether a protest is worth filing.
Important notice
The figures on this page are general information as of August 2026 and do not represent an offer, a quote, or a guarantee of any transaction terms. Reinvent NY does not provide legal, tax, or investment advice. Confirm anything material with an attorney and a CPA before you act on it. Nothing here is a solicitation to invest, and no return is promised. Real estate brokerage services are provided through R New York.