How this calculator works
Like UK Stamp Duty Land Tax or Canadian land transfer tax, duty in NSW, QLD, and WA is a marginal (slice) tax — each portion of the purchase price is taxed at the rate for that band. VIC is the exception: it's marginal for its bottom two bands, but for properties above $960,000 it switches to a flat rate applied to the WHOLE purchase price (5.5% up to $2,000,000, 6.5% above) rather than continuing as a marginal slice. All four states offer a first-home-buyer concession that follows a similar shape: full exemption up to a threshold price, then a linear phase-out of the rebate down to $0 by a second, higher threshold — except Queensland's new-home/vacant-land concession, which has no price cap at all.
Worked example
Take a $700,000 established home purchase in NSW by a first home buyer. Since $700,000 is below NSW's $800,000 full-exemption threshold for the First Home Buyers Assistance Scheme, the duty otherwise payable (calculated across NSW's marginal bands) is fully rebated — netting to $0 duty owed. Compare that with a $1,200,000 purchase in the same state by a buyer who isn't a first home buyer: well above the exemption threshold, so the full marginal-band duty applies with no rebate at all.
What affects your result
- State — each state has its own bands, rates, and first-home-buyer thresholds; Victoria's flat-rate top band is a structurally different mechanism from the other three.
- Purchase price — the main driver of gross duty, and whether you fall inside a first-home-buyer full exemption, a partial phase-out, or no concession at all.
- First-home-buyer status — can reduce duty to $0 for eligible purchases below the relevant threshold.
- New home / vacant land vs. established (QLD only) — Queensland's uncapped new-home/vacant-land concession is materially more generous than its capped established-home concession.
- Regional vs. metro (WA only) — WA's first-home concession phases out at a higher price for regional properties.
A note on accuracy
Stamp duty bands, thresholds, and concession rules are set by each state government and are revised periodically — the figures here are researched and current as of mid-2026, but Victoria's flat-rate top bands in particular are flagged in our engine for independent verification, and all figures should be confirmed against the relevant state revenue office before relying on them for a real transaction. This calculator does not include mortgage registration fees, foreign buyer surcharges, or other government charges that may also apply. See Revenue NSW, State Revenue Office Victoria, Queensland Revenue Office, and RevenueWA.