Stamp duty is a state or territory tax, so the amount you pay in Australia depends on where the property is located. A stamp duty calculator helps estimate the upfront duty, but the final figure can change with the purchase price, property type, buyer status and current concessions. Use the estimate early, because duty can affect your deposit, loan-to-value ratio and settlement budget.

What You Will Learn

This calculator intro explains what stamp duty covers, why it differs across Australia, what details you need before using the calculator, and how the estimate fits into your wider home loan budget.

What an Australian stamp duty calculator estimates

Stamp duty, also called transfer duty or land transfer duty in some jurisdictions, is charged when ownership of property is transferred. It is separate from your deposit, conveyancing fees, lender fees, building and pest inspections, moving costs and insurance.

A calculator generally asks for the state or territory, purchase price, property type, buyer type and whether the home will be your principal place of residence. It may also ask whether you are a first-home buyer, because exemptions and concessions can materially reduce the result.

According to ASIC MoneySmart, borrowers should compare home loans by looking at rates, fees and features, not just one headline number (MoneySmart, 2026). The same budgeting principle applies before settlement: the property price is only part of the cash required to buy.

Why duty differs by state and territory

Australia does not have one national stamp duty scale for property purchases. New South Wales, Victoria, Queensland, South Australia, Western Australia, Tasmania, the ACT and the Northern Territory each set their own rules.

Revenue NSW says transfer duty applies to dutiable transactions, including buying property (Revenue NSW, 2026). Queensland Revenue Office also treats transfer duty as applying to certain dutiable transactions, including land and business assets (Queensland Revenue Office, 2026). Victoria’s State Revenue Office describes land transfer duty as a tax payable when buying a property (State Revenue Office Victoria, 2026).

Those differences matter because the same A$700,000 purchase can produce different duty estimates depending on location. First-home buyer concessions, off-the-plan treatment, principal residence rules and surcharge rules can also differ.

How stamp duty affects your borrowing plan

Stamp duty usually needs to be funded from cash savings, although some buyers may adjust their loan structure or purchase price to manage total upfront costs. If duty reduces the cash available for your deposit, your loan-to-value ratio may rise. If your deposit is below 20 per cent, lenders mortgage insurance may apply, depending on the lender, product and your circumstances.

Read also: What Is Lenders Mortgage Insurance in Australia

For example, a buyer with A$120,000 saved for a A$750,000 home might appear to have a 16 per cent deposit before costs. After stamp duty, conveyancing, inspections and loan fees, the usable deposit may be lower. That can affect approval, LMI and the home loan options available.

When comparing loans, remember that advertised rates differ from the comparison rate, which includes most fees and charges. As of June 2026, rates and comparison rates change frequently, so verify current terms with a licensed lender or mortgage broker before deciding.

What to check before relying on the estimate

Before using the calculator result as a budget number, check:

  • The property state or territory.
  • Whether the home is established, new, off-the-plan or vacant land.
  • Whether it will be owner-occupied or an investment property.
  • Whether you are eligible for a first-home buyer exemption or concession.
  • Whether the purchase price is close to a threshold.
  • Whether foreign purchaser or absentee owner surcharges could apply.

Stamp duty rules, concessions, grants, fees and eligibility can change. Confirm the result with the relevant revenue office, your conveyancer or solicitor, and your lender or mortgage broker before exchange or settlement.

Conclusion

A stamp duty calculator is most useful before you make an offer, because it turns a vague buying cost into a practical settlement estimate. Run the numbers by state or territory, then build the duty estimate into your deposit, LVR and home loan comparison.

General advice warning

This information is general in nature only and does not consider your objectives, financial situation or needs. It is not personalised financial, lending, tax or legal advice. Consider obtaining personal advice from a licensed professional before making property, loan or settlement decisions.