About the WA Stamp Duty Calculator
Transfer duty (commonly called stamp duty) is a one-off tax Western Australia charges when you buy property, based on the purchase price or market value, whichever is higher. This calculator applies the WA Department of Finance's general marginal-rate brackets to estimate the duty payable on a standard purchase.
How it works
WA transfer duty is calculated on a sliding scale: each slice of the price is taxed at the rate for its bracket, similar to income tax. The calculator adds up the duty owed across all brackets up to your property price and shows the effective rate — the duty as a percentage of the price.
Assumptions and behaviour
- Uses the general rate — no first home owner concession or exemption applied.
- Assumes a standard residential purchase, not off-the-plan or a foreign-buyer surcharge scenario.
- Brackets shown are current as of the effective date noted below; WA periodically revises these thresholds.
Limitations
- First home buyers may pay less or nothing at all under WA's first home owner rate concession — check eligibility separately.
- Foreign buyer surcharge (Foreign Transfer Duty) in WA is not included.
- Rates are periodically revised — confirm the current bracket thresholds with the WA Department of Finance before settlement.
Privacy
The calculation runs entirely in your browser. Nothing is uploaded or stored.
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