On this page
General information only: Tax, registration, insurance and credit rules can change. Confirm the current position with the linked government authority and your finance or insurance contract before acting.
Quick answer
Motor vehicle duty—often called stamp duty—is a state or territory tax commonly triggered when a vehicle is first registered or its registration is transferred. The rate, vehicle categories, concessions and dutiable-value rules depend on the jurisdiction.
Why this matters when financing a car
Duty increases the cash needed to complete the purchase. If it is added to a loan, the amount financed rises without necessarily increasing the vehicle valuation, which can affect loan-to-value ratio, approval or the deposit required.
Why the advertised price may not be the taxable value
The tax is usually calculated from a legally defined dutiable value, not simply whichever figure appears on a receipt. For used vehicles, several jurisdictions use the purchase price or market value, whichever is higher. Rules for new vehicles can include GST, luxury car tax, manufacturer list price, accessories or other amounts depending on the state.
That is why declaring a low private-sale price does not reliably reduce duty. Revenue authorities can test the declared amount against market evidence and reassess the transaction, with interest or penalties where appropriate.
Why the state or territory changes the answer
Australia does not have one national motor vehicle duty schedule. Jurisdictions use different bands and may distinguish passenger vehicles, commercial vehicles, emissions categories, engine configuration, vehicle value or buyer type.
Concessions and exemptions are equally local and can change through budgets or legislation. Use the official calculator for where the vehicle will be registered and the actual transfer date; do not rely on a national percentage or an old dealer estimate.
New, dealer-used and private-sale transactions
A dealer may quote a drive-away price that already combines the vehicle, duty, registration and other on-road costs. Ask for an itemised order so you can see what is inside the total. For a used dealer or private purchase, transfer duty and transfer fees may be collected separately when ownership changes.
Duty is not the same as registration, transfer fees, CTP, comprehensive insurance or luxury car tax. Treat each as a separate line in the buying budget even when one party collects several of them together.
What to confirm before signing
Obtain an itemised purchase document and use the official calculator before assuming how much cash or finance is required.
- Where the vehicle will be registered
- Whether the official calculation uses price, market value or another statutory value
- Whether vehicle type, emissions or use changes the category
- Whether a current concession or exemption genuinely applies to the buyer
- Whether the finance approval includes duty and other on-road costs
State and territory guide
Use the official source for the jurisdiction where the vehicle will be registered. The summaries below explain the pathway; they do not replace the current calculator, scheme rules or eligibility test.
ACT
Duty depends on dutiable value and vehicle performance category; use the ACT Revenue calculator.
ACT Revenue Office — motor vehicle duty →NSW
Duty applies to relevant registrations and transfers; used vehicles are generally assessed on price or market value, whichever is higher.
Revenue NSW — motor vehicle duty →Northern Territory
Stamp duty applies to the issue or transfer of a motor vehicle registration certificate; an official calculator is available.
NT Government — motor vehicle duty calculator →Queensland
Vehicle registration duty can apply when a new or used vehicle is registered or transferred; categories and rates vary.
Queensland Revenue Office — vehicle registration duty →South Australia
Stamp duty is based on the higher of sale price and market value, with different treatment for commercial and non-commercial vehicles.
RevenueSA — stamp duty on vehicles →Tasmania
Duty applies to relevant registrations and transfers and is calculated from the statutory dutiable value.
State Revenue Office Tasmania — motor vehicle duty rates →Victoria
Duty depends on vehicle type, value and registration date; green and non-passenger categories can be treated differently.
State Revenue Office Victoria — motor vehicle duty →Western Australia
Vehicle licence duty is payable when a vehicle is licensed or a current licence is transferred, subject to exemptions.
RevenueWA — vehicle licence duty →Why duty can change the required deposit
A buyer agrees to purchase a used car privately and plans to contribute cash toward the purchase price. Duty, the transfer fee and insurance have not yet been added.
- The buyer checks the relevant state calculator using the correct sale price or market value rule.
- The complete settlement budget is rebuilt with duty, transfer costs and insurance as separate lines.
- The financier confirms whether the approved loan can include those costs and what vehicle value it will use.
Result: If the extra costs cannot be fully financed, part of the planned vehicle deposit must instead fund the on-road costs. The buyer either contributes more cash, lowers the vehicle price or changes the proposed structure before signing.
Primary sources
Government and statutory sources checked on 8 August 2026:
- Business.gov.au — stamp duty overview
- Revenue NSW — motor vehicle duty
- Queensland Revenue Office — vehicle registration duty
- State Revenue Office Victoria — motor vehicle duty
- RevenueWA — vehicle licence duty
See BaseRate’s editorial policy and the complete car-buying costs hub.