How is stamp duty calculated in NSW?

Stamp duty is the largest single line on a NSW settlement statement after the deposit. On a $900,000 purchase a non-first-home buyer pays roughly $35,800 of transfer duty, which is real cash that has to clear before settlement. The formula is not complicated, but it is bracketed, and most online estimates round in directions that hurt. Here is what Revenue NSW actually does to your contract price.

The six-bracket sliding scale

NSW transfer duty is a marginal-rate tax, the same way income tax is. Every dollar above a bracket threshold is taxed at the rate for that bracket, not the rate for your top bracket on the whole price. The 2026 schedule (the brackets are indexed annually to CPI) looks broadly like this for a standard residential transfer:

• Up to $17,000: $1.25 per $100 of dutiable value.
• $17,001 to $36,000: $212 plus $1.50 per $100 over $17,000.
• $36,001 to $97,000: $497 plus $1.75 per $100 over $36,000.
• $97,001 to $364,000: $1,564 plus $3.50 per $100 over $97,000.
• $364,001 to $1,212,000: $10,909 plus $4.50 per $100 over $364,000.
• $1,212,001 to $3,636,000: $49,069 plus $5.50 per $100 over $1,212,000.
• Above $3,636,000 (premium property duty): $182,389 plus $7.00 per $100 over $3,636,000.

The headline rate for most family homes is the 4.5% bracket between $364k and $1.21M. Cross into the $1.21M bracket and the rate steps to 5.5%, which is why a $1.3M purchase costs noticeably more than a proportional bump from $1.1M would suggest. Cross into premium property territory above $3.636M and the marginal rate jumps again to 7.0%. Indexation moves these thresholds every July, so a contract signed in late June and one signed two weeks later can produce slightly different bills.

These numbers change annually. The stamp duty calculator carries a verified-on date so you can see the brackets it is using before you trust the output.

First-home buyer exemption and concession

The First Home Buyer Assistance Scheme is the biggest single concession a NSW buyer can claim, and it has hard cliffs that catch people out. For new and existing homes:

• Full exemption (zero duty) on purchases up to $800,000.
• Sliding concession between $800,001 and $1,000,000, scaled linearly so a $900k purchase pays roughly half what an equivalent non-first-home buyer would pay.
• No concession at all from $1,000,001 upwards.

Vacant land carries its own thinner band: full exemption to $350,000, taper to $450,000. A few conditions sit underneath the headline numbers. You must be an Australian citizen or permanent resident, at least 18, and you must move into the home within 12 months and live there for a continuous six. If you fail the residency test the concession is clawed back, with interest, which is a nasty surprise for buyers who let the property to a friend at mates rates while still "intending" to move in.

The cliff at $1M is the one that wastes the most money. A first-home buyer paying $1,000,000 owes zero extra duty on the last dollar; a first-home buyer paying $1,000,001 owes the full non-concessional duty of about $42,000. If you are negotiating anywhere near the line, the price you agree to matters in a way the agent will not volunteer.

Foreign-buyer surcharge

Buyers who are not Australian citizens, permanent residents, or New Zealanders living in Australia pay an additional 8% surcharge purchaser duty on residential property, on top of the standard transfer duty. On a $1.2M purchase that surcharge alone is $96,000, payable at settlement.

Trust structures, partnerships, and certain visa categories carry their own rules, and a temporary resident on a partner visa is treated differently from a temporary resident on a 482. The surcharge is administered by Revenue NSW and the eligibility rules are interpreted strictly. If any of this applies, treat the calculator output as the floor and consult a property lawyer before you exchange. The platform's calculator deliberately does not model the foreign-buyer surcharge for that reason.

Off-the-plan and deferred duty

Buying off the plan as an owner-occupier shifts when the duty is due rather than how much. Standard practice is that duty is payable three months after the contract date. The off-the-plan concession defers the liability until the earlier of the completion of construction or 12 months from contract. If you plan to live in the property as your principal residence for the first 12 months after settlement, you keep the deferral; if you sign and then assign the contract or rent it out before moving in, the original contract date kicks back in and Revenue NSW wants the duty plus interest.

The deferral matters most when settlement is genuinely 18 to 24 months away. Holding $40,000 of duty in an offset account for two years is real interest saved. It is not a discount on the duty itself, just a timing advantage.

When the cheque is actually due

On a standard existing-home purchase, transfer duty is payable within three months of the contract date or at settlement, whichever is earlier. Most settlements run inside 60 days, so in practice the duty clears at settlement alongside the loan proceeds. Your conveyancer will lodge the transfer through PEXA and the duty is paid electronically as part of the settlement workflow.

Late lodgement attracts interest at the general interest charge rate, which is well into double digits in 2026, plus a penalty tax of up to 25% for serious cases. Conveyancers handle this cleanly the vast majority of the time; the rare botches happen when a buyer self-conveyances a complex contract.

How to use this on your purchase

Order of operations matters. Establish what you can borrow first, because borrowing capacity sets the price ceiling that determines which duty bracket you land in.

1. Run your scenario through the borrowing power estimator to set a realistic price ceiling.
2. Plug the target price into the stamp duty calculator to get the duty figure for your buyer type.
3. Carry the duty plus deposit into the mortgage calculator as upfront cash, alongside conveyancing and inspections.

If you are still narrowing down where in NSW to buy, the suburb scanner ranks SA2s on the data points that drive long-run outcomes rather than agent talking points. And for buyers comparing states, the NSW vs VIC stamp duty breakdown flags the price points where the cheaper state flips, which is useful if you are open to either side of the border.

Stamp duty is the entry tax on ownership. It is unavoidable, it is large, and it is one of the few costs in a purchase that is fully knowable before you sign. There is no excuse for being surprised by the number on settlement day.