The Co-op Shareholder's Guide to the Surcharge

The short answer: co-ops are fully covered by the surcharge — the "co-ops are exempt" rumor is false. Your unit's value is DOF's fractional-share allocation: the building's DOF market value × your ownership percentage. Over $1,000,000 and not a primary residence → a flat 4%–6.5% of the full value yearly. The exemption-application deadline — extended to September 18, 2026 — is the same for co-ops as for every other property type.

Why co-op numbers surprise people

DOF doesn't value your apartment; it values your building (by income approach) and slices that by the share register. Two consequences: shareholders in prewar buildings with big allocations can test over $1M at values that shock them — and shareholders in huge buildings often test far under what they'd guess from resale prices. The number that decides is neither your purchase price nor a broker's estimate; it's the ledger math.

Better news than most owners know: for its July 2026 Supplemental Market Value Roll, DOF itself published imputed per-unit values for 36,677 co-op units across 764 buildings — most of Manhattan's co-op stock. If your unit is one of them, your exact official figure exists and our free check pulls it directly — no share percentage needed from you.

If you do enter your share % — enter it right

Real cases from this week: owners entered ".0526" (the decimal fraction from their proprietary lease) where the form expects a percent — turning a 5.26% share into 0.0526% and a plausible apartment into a "$5,428 unit." Read your stock certificate carefully: a fraction like 0.0526 usually means 5.26%. Our forms now flag suspicious entries, and implausible results are reviewed by a person before anything is sent.

The ledger math, worked once

Say your building's DOF market value on the July 2026 roll is $48,000,000 and you hold 250 of the corporation's 10,000 shares — a 2.5% allocation. Your unit's surcharge value is $48M × 2.5% = $1,200,000. That is over the $1M threshold, so as a non-primary residence it owes the flat 4% band on the full value: $48,000/yr. Note what never entered the math: what you paid, what your neighbor sold for, what StreetEasy thinks. Only the building value and the ledger.

Why your address lookup may come up empty

Condos carry their own tax lots, so any address search finds them. Co-op value works differently: DOF's figures hang off the building's record — often a different lot than an address geocoder returns — keyed by DOF's internal co-op number. Generic property-lookup tools routinely return nothing, or the whole building, for a co-op unit; that silence does not mean you're exempt. Our free check resolves units through DOF's own co-op identifiers, which is how it finds the 36,677 published per-unit values.

The board problem with the lease exit

The 12-month arm's-length lease exemption assumes you can actually deliver a 12-month lease. In a co-op that runs through the board: sublet applications, interviews, fees, and — the real trap — house-rule sublet caps. A policy allowing subleases of only one year at a time still clears the statutory 12-month minimum; a policy capping subleases at less than 12 months, or limiting how many years you may sublet in any five, can close the exemption entirely or make it a one-time exit. Before counting on the lease path: pull your proprietary lease and house rules, ask the managing agent for the board's sublet calendar, and build in the approval lead time. The tenant must be a natural person using the unit as their primary residence — a corporate sublet does not qualify.

For boards and managing agents

Boards can't file exemptions for shareholders — each shareholder documents their own status — but boards and agents are where shareholders will bring the confusion. Two useful moves: circulate the September 18 deadline and the notice playbook building-wide, and get ahead of the valuation questions with a building exposure list — our professional reference takes batch valuation requests for entire buildings, free.

The co-op exits are the same three

Primary residence (you, more than half the year), immediate family occupancy (spouse, child, sibling, parent, grandparent, grandchild), or a bona fide 12-month arm's-length lease — with a co-op-specific caveat: sublet policies and board approval add lead time to the lease path, so start early. Details and documentation for each: the exemptions guide.

Deadlines and paperwork

• September 18, 2026 — DOF's published exemption-application deadline (extended; same for all property types).
• 30 days from any notice to rebut with residency documents — the playbook.
• The roll stays open to correction through December 2026 — fractional-share errors can be challenged; see appeals.

Questions owners ask

Are NYC co-ops subject to the pied-à-terre tax?

Yes. Co-op units are fully covered: DOF values each unit by the fractional-share method (the building's DOF market value × the unit's ownership percentage), and units over $1,000,000 owe the flat 4%–6.5% annual surcharge when not a primary residence. For the July 2026 roll DOF published imputed values for 36,677 co-op units across 764 buildings. The co-op exemption-application deadline was September 18, 2026.

How is a co-op apartment valued for the NYC surcharge?

By fractional share: DOF's income-approach market value for the entire building, multiplied by the unit's share percentage from the co-op's stock register. It is not the resale price — prewar units with large allocations can test higher than owners expect, and units in very large buildings often test lower.

Can a co-op board claim the pied-à-terre exemption for the whole building?

No. The surcharge attaches unit by unit and the exemptions are claimed by each shareholder with their own documentation — primary occupancy, immediate-family occupancy, or a bona fide 12-month lease. Boards and managing agents can help by circulating deadlines and getting a building-wide valuation list, but they cannot file on a shareholder's behalf.

Does a co-op sublet policy of one year at a time satisfy the 12-month lease exemption?

A board policy allowing 12-month subleases clears the statutory minimum — the exemption requires a bona fide arm's-length lease of at least 12 months to a natural person using the unit as a primary residence. Policies capping subleases below 12 months, or restricting how many years an owner may sublet, can make the lease exemption unavailable or one-time; check the proprietary lease and house rules before relying on it.

Where do I find my co-op ownership percentage?

On your stock certificate, proprietary lease, or annual maintenance statement. Caution: leases often express it as a decimal fraction — 0.0526 means 5.26%, not 0.0526%. If DOF published your unit's value on the July 2026 roll (most of Manhattan), you don't need the percentage at all — the free check pulls DOF's own figure.

Disclaimer. This page is educational information from Conquest, a licensed New York real estate brokerage. It is not legal, tax, or accounting advice, and no advisory relationship is created by reading it. Deadlines and figures reflect DOF's published rules and roll as of the "last updated" date above.