For years, New Jersey’s so-called mansion tax was a buyer problem: cross $1 million on a purchase and the buyer owed an extra 1% on top of everything else at closing. A 2025 law change flipped that. The fee now lands on the seller, and it no longer stops at a single 1% rate — it climbs in steps as the sale price rises, alongside the Realty Transfer Fee the seller was already paying.
How the graduated schedule actually works
The fee applies in slices, the same way an income tax bracket does — each portion of the price gets its own rate, not the whole price at once. The first $1,000,000 of the sale price owes nothing under this fee. The next slice, from $1,000,000 up to $2,000,000, is taxed at 1%. From $2,000,000 to $2,500,000 the rate is 2%. From $2,500,000 to $3,000,000 it’s 2.5%. From $3,000,000 to $3,500,000 it’s 3%. Anything above $3,500,000 is taxed at 3.5%. Only the dollars inside each bracket get that bracket’s rate — the whole sale price never jumps to the top rate just because the total crossed a threshold.
| Sale price | Mansion tax owed | Effective rate on full price |
|---|---|---|
| $1,000,000 | $0 | 0% |
| $1,500,000 | $5,000 | 0.33% |
| $2,000,000 | $10,000 | 0.5% |
| $2,750,000 | $26,250 | 0.95% |
| $4,000,000 | $65,000 | 1.63% |
Working the $2,750,000 example
The first $1,000,000 is untaxed. The next $1,000,000 (up to $2,000,000) owes 1%, or $10,000. The next $500,000 (up to $2,500,000) owes 2%, or $10,000. The final $250,000 owes 2.5%, or $6,250. Add those three slices — $10,000 + $10,000 + $6,250 — and the seller owes $26,250 in mansion tax alone, before the separate Realty Transfer Fee.
This stacks on top of the Realty Transfer Fee, not instead of it
The mansion tax is a separate line from New Jersey’s existing Realty Transfer Fee, which is also seller-paid and was already graduated before this change — roughly 0.4% to 1.21% depending on price. A seller closing above $1 million now budgets for both: the RTF on the full price, plus this bracket schedule on the portion above $1 million. Neither one replaces the other.
Why the payer flip matters more than the rate
Before 2025, this fee sat on the buyer’s side of the closing statement. Now it sits on the seller’s side, which changes who needs to underwrite it before signing a contract — not just how much is owed. An investor exiting a flip above $1 million needs to build this into the target profit calculation on the sell side, the same way they’d build in a real estate commission. A buyer who was pricing in an extra 1% out of habit no longer owes it at all; that line simply disappears from the buyer’s closing costs.
It also matters for negotiation. A seller who doesn’t realize the fee moved may price a listing assuming buyer-side costs that no longer exist, while underestimating their own net proceeds. Running the actual numbers before listing — rather than assuming last year’s allocation still holds — avoids a surprise on the settlement statement. The New Jersey Division of Taxation publishes the current realty transfer and mansion tax guidance if you want to confirm the schedule directly against a specific closing.
Who this actually affects
Most New Jersey sales never touch this fee — it only applies once the price crosses $1 million. But New Jersey has some of the country’s most expensive residential markets, particularly in parts of North Jersey and the Shore, where seven-figure sales are routine rather than rare. Anyone selling in that range needs this in the model well before closing, not as a line item discovered on the settlement sheet.