Wisconsin Car Sales Tax Calculator

Waukesha and Winnebago are the only two counties that haven't adopted the 0.5% county tax, so vehicles kept there are taxed at the flat 5% state rate - unless you're inside a taxing city, which for vehicles currently only applies to Milwaukee.

Milwaukee stacks three layers: the state's 5%, Milwaukee County's 0.9% (raised from 0.5% in January 2024), and a 2% city of Milwaukee sales tax that took effect the same month. That's 7.9% total for anyone who keeps their vehicle inside the city limits - county residents just outside the city pay 5.9%.

At a dealership, yes - Wisconsin taxes the price minus your trade-in allowance when both happen in the same transaction. Sell your old car privately and buy a new one separately, though, and you get no credit; you're taxed on the full purchase price of the new vehicle.

The rate is identical, but private buyers pay the tax directly to WisDOT when they title the vehicle rather than at a dealer's counter, and there's no trade-in deduction. Wisconsin doesn't run a presumptive-value check the way some states do - tax is based on the price you report.

Yes, when no money or other consideration changes hands. It's marked as a 'Gift' exemption on the title application. Family transfers - spouse, parent, child, step-relations, in-laws, grandparent/grandchild, sibling - are also exempt, though only when the vehicle already carries a current Wisconsin title.

Yes, as use tax at your local combined rate when you title it in Wisconsin, with a credit for any legitimate sales tax you already paid elsewhere. If the other state's rate was lower, you owe Wisconsin the difference.