Appealing the surcharge: the window runs to March 2027
Most coverage of this tax stops at the August 2026 exemption deadline. That is not the last date that matters. The NYC Tax Commission hears surcharge appeals until March 2027, and it can review both what the property is worth and whether it is a primary residence.
Two separate grounds
They are worth telling apart, because they run on different tracks.
- The market value is too high. The surcharge is a flat percentage of the full DOF market value, so the value decides both whether you are over the threshold at all and which rate band you land in. A market value appeal must be filed by the March deadline for your tax class, whatever happens with residency.
- The property is a primary residence. DOF states you can ask the Tax Commission to review whether the property is exempt, not only what it is worth.
If you appealed residency to DOF first
You may appeal DOF's final determination to the Tax Commission by the applicable March deadline or within 30 days of the date on DOF's final determination notice, whichever is later. A market value appeal still has to meet the March deadline regardless. The 30-day extension does not carry it.
And if you never appealed residency at all, you can still challenge the market value at the Tax Commission by the March deadline.
Why the value is worth a hard look
Because the rate applies to the full value rather than the amount above a line, every band edge is a cliff. A condominium at $2,999,999 pays 4% of the whole value; at $3,000,001 it pays 5.25% of the whole value, roughly $52,000 a year apart for one dollar of assessed value.
Across the published roll, 5,959 properties sit within 10% above a band edge, with about $324 million a year between them riding on a revaluation. The tightest is over its line by a few hundred dollars. Our tool flags that population and shows, per property, exactly what dropping below the edge would be worth.
None of that is a claim that a reduction is achievable. That is the Tax Commission's decision. It is arithmetic on DOF's own published rate table.
Deadlines in order
| What | Who | When |
|---|---|---|
| Exemption application | Homes and condominiums → DOF | 21 August 2026 |
| Exemption application | Co-op units → DOF | 24 August 2026 |
| Surcharge appeal | Tax Class Two → Tax Commission | 1 March 2027 |
| Surcharge appeal | Tax Class One → Tax Commission | 15 March 2027 |
Where to file and who to ask
- NYC Tax Commission: Surcharge Appeal ↗, with the forms, general instructions and definitions
- DOF: non-primary residence surcharge ↗, for exemption applications and affidavits
- Questions on Tax Commission surcharge appeals only: TCSurchargeAppeal@oata.nyc.gov. Allow five days for a reply. Questions do not extend a filing deadline, and staff cannot give legal advice.
The five exemption routes → · Why co-ops appear on the list →