The mansion tax cliff: why $999,999 and $1,000,000 are different worlds
New York's mansion tax has the most misleading name in real estate. It has nothing to do with mansions — it hits one-bedroom condos — and it doesn't work the way most buyers assume. It's not a tax on the amount above $1 million. Cross the threshold by a single dollar and the tax applies to the entire purchase price.
The cliff, in numbers
Buy at $999,999 and the mansion tax is zero. Buy at $1,000,000 and you owe 1% of the whole thing — $10,000 — due at closing, from the buyer. That's a $10,000 penalty for one dollar of price. And the cliffs keep coming: the rate steps up through a series of tiers as the price rises, topping out at 3.9% on purchases of $25 million and up. Each tier applies to the full price, so every threshold is its own cliff.
| Purchase price | Mansion tax (buyer pays) |
|---|---|
| $999,999 | $0 |
| $1,000,000 | 1% — $10,000 |
| $2,000,000 | 1.25% — $25,000 |
| $5,000,000 | 2.25% — $112,500 |
| $10,000,000 | 3.25% — $325,000 |
| $25,000,000+ | 3.9% |
What this means for negotiation
Around every threshold there's a dead zone: a contract at $1,010,000 is genuinely worse for the buyer than one at $999,999 plus terms. This is where deal structure earns real money. Price and consideration aren't the only levers in a New York contract — closing credits, what's included or excluded, timing, and how the deal is papered all affect what the buyer ultimately pays and what the seller ultimately nets. Sellers listing just above a threshold should understand they're fishing in a thinner pond; buyers bidding near one should know exactly what that next dollar costs. I've watched deals die over a threshold neither side had priced in — and I've closed deals where knowing the cliff was the entire negotiation.
The rest of the closing-cost picture
The mansion tax is the buyer's headline number, but it travels with others. Sellers in NYC pay state and city transfer taxes — typically around 1.4% to just over 2% combined depending on price. Co-op sellers often face building flip taxes on top. New-development buyers are frequently asked to absorb the seller's transfer taxes, which changes the real price of a sponsor unit versus a resale. None of this is exotic; all of it is knowable in advance. The failure mode is discovering it at the closing table.
Buyer's checklist near a threshold
1. Know your all-in number — price plus mansion tax plus your side of the closing costs — before you bid, not after.
2. If you're within ~3% of a tier line, model the deal on both sides of it. The comparison often changes the offer.
3. On new development, negotiate who pays the transfer taxes. It's a real number, and it's negotiable.
4. Run the structure past your attorney and CPA before you're in contract. I coordinate that as part of the deal, not as an afterthought.
The point
Taxes don't kill New York deals. Surprises do. The mansion tax is a published schedule that rewards buyers and sellers who plan around it — and quietly punishes everyone who treats it as a closing-day detail.
Know your all-in number before you bid.
Fifteen minutes, your target price range, and I'll walk you through exactly what the deal really costs.
Call or text (410) 935-0511