Stamp duty and registration are the two on-road costs buyers most often forget until the final invoice lands. They're set by your state or territory, not the dealer, and they can swing the total cost of the same car by thousands depending on where it's registered. Here's how they work, where the traps hide, and how to get a real number before you sign anything.
What you're actually paying
A "drive-away" price bundles several separate charges. The two big government slices are stamp duty (a one-off transfer tax) and registration plus CTP insurance (an ongoing cost you pay for each registration period you keep the car). Getting these straight matters, because only one of them is a once-off.
- Stamp duty (vehicle transfer duty): a one-off tax charged when the car is registered in your name, generally calculated as a rate applied to the price you pay or the car's market value, whichever the state treats as higher.
- Registration (rego): a recurring fee to keep the car legally on the road, usually bundled with number plates and an admin or transfer fee, and payable for 6- or 12-month periods depending on the state.
- CTP / green slip: compulsory third-party injury insurance, priced separately in some states (like the NSW green slip) and folded into rego in others (like Queensland).
To see all of these built into one figure for a specific car, run it through our drive-away price build-up rather than trusting a headline sticker price.
Why stamp duty differs so much by state
Every state and territory sets its own stamp duty rules, and they rarely agree on the method. Three things drive the differences:
- The rate itself, usually expressed as dollars per $100 of the car's value.
- Price tiers: most states charge a higher rate above a certain value threshold, so pricier cars are taxed harder.
- Vehicle type: some jurisdictions vary the rate by engine size, fuel type, emissions, or whether the car is an EV, a hybrid, or a passenger vs commercial vehicle.
Because the rates and thresholds move over time and vary by category, it's not worth memorising a table. Instead, plug your car's price and state into the stamp duty & rego calculator to get a current figure for all eight states and territories at once, and see which one is cheapest for your exact car.
EVs and low-emission cars
Several states have offered stamp duty discounts, waivers, or rebates for electric and low-emission vehicles, but these programs have been wound back, capped, or replaced over time (NSW, for example, ended its EV stamp duty exemption). Don't assume an incentive still applies. Confirm the current rule with your state or territory revenue office before you factor a discount into your budget.
Registration: the cost that keeps coming
Stamp duty stings once. Rego stings every year. Registration plus CTP can differ meaningfully between states, and it's an ongoing line item that quietly shapes your total cost of ownership. If you're comparing the true long-run cost of a car, feed it into our total cost of ownership calculator so rego, fuel, depreciation and finance all sit in one place.
Where stamp duty bites hardest: expensive cars
Because most states escalate the rate above a value threshold, stamp duty grows faster than the price on premium cars. On top of that, cars over the federal Luxury Car Tax threshold attract LCT, a separate federal tax charged on the value above the threshold. In most states stamp duty is then calculated on the price including LCT and GST, so the two taxes compound. If you're shopping near that mark, check the Luxury Car Tax threshold first and confirm the current rate and thresholds with the ATO, because LCT can quietly push a car into a much higher total-tax bracket.
Stamp Duty & Rego Calculator
Vehicle stamp duty + registration for all 8 states, EV concessions, cheapest state.
How to get a number you can trust
- Use your car's actual purchase price, and remember duty is charged on what you pay or the car's market value, whichever the state treats as higher.
- Register in the state or territory where the car is actually garaged, and use that jurisdiction's figures.
- Treat any EV or low-emission discount as "confirm before you count it", not a given.
- Separate the one-off (stamp duty) from the recurring (rego and CTP) so your budget is honest about year two and beyond.
Do that, and the final invoice holds no nasty surprises.
Drive-Away Price Calculator
The real on-road price: vehicle + GST + LCT + stamp duty + rego/CTP + delivery.
Frequently asked questions
Is car stamp duty the same in every Australian state?
No. Each state and territory sets its own rate, price thresholds, and concessions, so the same car can cost noticeably more or less to register depending on where it's garaged. Use the stamp duty calculator to compare all eight jurisdictions for your specific car and price.
Can I register my car in a cheaper state to pay less stamp duty?
Generally no. You're required to register a vehicle where it's garaged, which usually means where you normally reside or where your business operates. Registering interstate purely to dodge duty risks penalties, unpaid duty, and even invalid insurance. Confirm the rules with your state revenue office.
Do electric cars still get a stamp duty discount?
It depends on your state and the current date. Several EV stamp duty concessions have been introduced, capped, or wound back over the last few years, and some have ended entirely. Don't assume a discount applies. Check the latest position with your state or territory revenue office before budgeting for it.
Is stamp duty a one-off cost or annual?
Stamp duty is a one-off tax paid when the car is first registered in your name. Registration (rego) and CTP insurance, by contrast, are recurring costs you pay for each registration period you keep the car.
General information only — not financial, tax or legal advice. Figures change; confirm with the ATO, your state revenue office and a licensed adviser, and use the calculators for your own numbers.