Car Stamp Duty WA Calculator: The Full Rate Table (2026)

August 19, 2026 3 Min Read

Most car stamp duty WA calculator guides give you three example prices and send you off to a government tool. Here’s the full sliding scale, worked out at every price point, plus the fees people mix up with duty.

Quick Answer: Car Stamp Duty WA Calculator

WA charges vehicle stamp duty on a sliding scale, not one flat rate. Up to $25,000, you pay 2.75% of the vehicle’s value. Between $25,000 and $50,000, the rate rises gradually. Above $50,000, it’s a flat 6.5%. On top of duty, you also pay a separate $20.50 transfer fee, plus registration and CTP insurance. Most guides only show two or three example prices. Here’s the full picture across the range.

1. The Sliding Scale, Explained Properly

Under $25,000, the rate is simple. So you pay a flat 2.75% of the car’s dutiable value, no sliding involved.
Between $25,000 and $50,000, the rate climbs. Specifically, the formula is 2.75 plus (value minus $25,000) divided by $6,666.66, giving a rate that rises smoothly through this band.
Over $50,000, it’s a flat 6.5%. So a $70,000 car and a $150,000 car both pay the same percentage, just on a bigger number.
Heavy vehicles follow a different rule. Since they’re over 4.5 tonnes, they instead pay 3%, capped at $12,000, regardless of value.

2. Worked Examples Across the Full Range

A $15,000 car costs $412.50 in duty. That’s the flat 2.75% rate, since it sits below the $25,000 threshold.
A $30,000 car costs roughly $981 in duty. So this falls in the sliding band, where the rate has climbed just above 3.25%.
A $50,000 car costs $2,750 in duty. So this is the exact point where the sliding scale ends and the flat 6.5% rate begins.
An $80,000 car costs $5,200 in duty. Since it’s above $50,000, the math is simple: just multiply the price by 6.5%.

3. Stamp Duty vs Transfer Fee vs Rego: Three Separate Costs

Stamp duty is the biggest cost, and it scales with price. So it’s calculated using the sliding scale above, based on what the vehicle is worth.
The transfer fee is a small, fixed cost. So it’s $20.50, charged separately from duty, every time ownership changes hands.
Registration and CTP are ongoing, not one-off. So these get paid yearly or every few months, unlike duty and the transfer fee, which are paid once at purchase.
Many buyers wrongly assume these are all one fee. Since dealers often bundle them into one on-road price, it’s easy to lose track of what you’re actually paying for.

4. Exemptions You Might Not Know About

Inherited vehicles attract only nominal duty. So if you inherit a car as part of a deceased estate, you typically pay a small $20 nominal duty instead of the full rate.
Primary producers can access a concession. So this applies to certain farm vehicles used mainly for primary production, not everyday passenger cars.
Pensioner and concession card holders may get a discount. So it’s worth checking your eligibility before you pay full duty on your next car.
Spousal and de facto transfers are usually exempt. Since transferring a vehicle between spouses or de facto partners doesn’t normally trigger duty at all.

FAQ: Car Stamp Duty WA Calculator

How much is stamp duty on a $40,000 car in WA?
Roughly $1,650, since $40,000 falls in the sliding band between $25,000 and $50,000 where the rate climbs gradually.

Is stamp duty different from the transfer fee in WA?
Yes. Stamp duty scales with the car’s value, while the transfer fee is a separate, fixed $20.50 charge every time ownership changes.

Do you pay stamp duty on a private sale car in WA?
Yes. Stamp duty applies whether you buy from a dealer or a private seller, based on the car’s value or purchase price.

Is there a stamp duty exemption for inherited vehicles in WA?
Yes. Vehicles inherited through a deceased estate typically attract only a small $20 nominal duty instead of the standard rate.

What’s the stamp duty rate on a car over $50,000 in WA?
A flat 6.5% of the vehicle’s value, with no further sliding scale above that threshold.