How does the appeal at the Department of Finance work?
Updated 2026-08-04.
An appeal is not a second application. It is a written challenge to an initial determination, filed through the same portal, inside 30 days of the date that determination was transmitted. For fiscal year 2026-27, DOF's emergency rule of August 3, 2026 extends that window to September 18, 2026, or a later date the Commissioner sets where good cause is shown, whichever is later.
What do you file, and where?
The appeal is in writing, through the Department of Finance electronic portal, or, since the August 3, 2026 emergency rule, in person at locations the Commissioner designates. The evidence is the same evidence that establishes primary residence in the first place. 19 RCNY 62-06(b), as amended, describes the sets the department accepts:
- The most recent federal or state income tax return showing the address at the property, or a driver's license or other DMV-issued identification. Since the August 3, 2026 amendment, either one carries the base set on its own.
- What if neither is available? The fallback is both a voter identification card and one other proof that the property is the primary residence.
- For a family relationship: a marriage or birth certificate, or an affidavit.
- For the tenant path: the lease plus the tenant's own residency documents. The lessee or sublessee has to be a natural person, so an LLC tenant cannot establish primary residency. The final rule added documentation pathways for renters on month-to-month leases or subleases and for spouses of owners.
- For entities and trusts: organizational documents plus an affidavit from an officer or trustee.
The amended return, before the appeal
The final rule added a step that did not exist in the proposed version: an owner may file an amended income tax return before appealing. That matters when the return the department would look at carries the wrong address, because correcting the underlying document is a different act from arguing about it. It does not buy time. The 30 days still run from the date the determination was transmitted.
Hearings
Hearings are held in four formats: by mail, by webform, in person, or by webcast. Petitions for a penalty hearing run on the same 30-day clock, measured from transmission, which is worth knowing before a penalty notice sits unopened on a desk for a week.
The final determination, and what comes after
The commissioner issues a final determination. That is the end of the Department of Finance track. If what remains in dispute is the value rather than the residency, the Tax Commission runs on its own calendar: March 1, 2027 for Class 2 condominium and cooperative units, March 15, 2027 for Class 1 one- to three-family homes, or 30 days after DOF's final determination, whichever of those is later. The mechanics of that filing are on the Form TC107 page.
Two things are worth keeping in view while assembling an appeal. A certification that is materially inaccurate or misleading and that would lower the surcharge draws a penalty of 300% of the difference, capped at 50% of the surcharge, and the audit window runs six years with subpoena power. The point of the exercise is to document the facts as they are, not to improve them.