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

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.

For related reading, see our guides to Buying a Used Car From an Auction: What You Gain and What You Lose and PPSR Check: Why It’s $2, Not $22 (2026 Guide).

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.

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