What is the car sales tax rate in Wisconsin?

Wisconsin taxes vehicle purchases at the same 5.0% state rate as general sales tax. Most of the 72 counties add a 0.5% county tax, and a few districts add another 0.1%, so the combined rate is usually 5.0% to 5.6%.

Does a trade-in reduce sales tax in Wisconsin?

Yes. Wisconsin subtracts the trade-in allowance on a like-kind vehicle from the purchase price before tax is calculated. You only pay tax on the difference, which can save hundreds of dollars.

Are manufacturer rebates taxed in Wisconsin?

Cash manufacturer rebates reduce the taxable amount in Wisconsin because they are treated as a reduction in the sale price. The tax is charged on the price after the rebate is applied.

Are dealer doc fees taxable?

Yes. Dealer documentation and service fees are part of the taxable sale price in Wisconsin, so they are added to the price before the sales tax rate is applied.

Does the sales tax include title and registration?

No. Sales or use tax is separate from the DMV's title and registration fees. This calculator shows only the sales tax and the price plus tax; add the title and registration fees separately.

Wisconsin Car Sales Tax Calculator

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Buying a car in Wisconsin adds a 5.0 percent state sales tax plus a county tax to the price. The state lets a trade-in and a manufacturer rebate lower the amount you pay tax on, so the order of operations matters. This calculator applies all of it.

How it works

The taxable amount and tax are computed as:

Taxable = price + doc fee − trade-in − rebate
Tax     = Taxable × (5.0% state + county rate)

Wisconsin subtracts the trade-in allowance and cash rebate before applying the rate, while dealer doc fees are added in because they are taxable. The county rate is usually 0.5 percent, giving a typical combined rate of 5.5 percent.

Example

A 30,000 dollar car with an 8,000 dollar trade-in, a 1,000 dollar rebate, and a 250 dollar doc fee in a county at 0.5 percent has a taxable amount of 21,250 dollars. At the 5.5 percent combined rate the sales tax is about 1,169 dollars. The trade-in alone saved roughly 440 dollars in tax versus selling it privately.

Notes

A handful of stadium and premier-resort districts add 0.1 percent on top of the county rate, so adjust the county field if you buy in one. Title and registration are separate DMV charges. Private-party purchases are subject to the same use tax, collected when you register. Verify current rates at revenue.wi.gov.