Does Iowa charge sales tax on cars?

Iowa does not apply its regular 6% sales tax to vehicles. Instead it charges a one-time 5% fee for new registration on the purchase price, collected by the county treasurer when you register the vehicle. This 5% fee functions like a vehicle sales tax.

Is the Iowa vehicle fee a flat rate everywhere?

Yes. The 5% fee for new registration is a statewide rate with no additional county or city add-on, unlike general retail sales tax which includes a 1% local option in many areas. The same 5% applies wherever you register in Iowa.

Does a trade-in reduce the Iowa vehicle tax?

Yes. Iowa lets you deduct the trade-in allowance from the purchase price before the 5% fee is calculated, so trading in a vehicle directly lowers the tax. The fee applies only to the net difference you pay.

Are dealer rebates taxed in Iowa?

Manufacturer rebates generally do not reduce the taxable price in Iowa, so the 5% fee usually applies before the rebate is subtracted. Trade-in allowances do reduce the taxable amount, but rebates typically do not.

What else do I pay besides the 5% fee?

Beyond the 5% fee for new registration you also owe the annual registration (license plate) fee, which Iowa bases on vehicle value and weight, plus a one-time title fee. Those recurring and title charges are separate from this tax.

Iowa Car Sales Tax Calculator

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Iowa is unusual: it does not apply its regular sales tax to cars. Instead a flat 5 percent fee for new registration is charged when you register the vehicle. This calculator computes that fee on the price after your trade-in so you know what the county treasurer will collect.

How it works

The fee is a single statewide rate on the net purchase price:

Taxable price = purchase price − trade-in allowance
Fee for new registration = 5% × taxable price
Total = purchase price + fee

There is no county or city add-on, so the rate is the same anywhere in Iowa. Trade-in value reduces the taxable amount, while manufacturer rebates generally do not.

Example

Buying a $30,000 car with a $6,000 trade-in leaves a taxable price of $24,000. The 5 percent fee for new registration is $1,200, so you pay $31,200 before the annual plate fee and title charge.

Notes

This tool covers the 5 percent fee only. The annual registration fee, which Iowa bases on the vehicle’s value and weight, and the one-time title fee are separate — estimate them with the Iowa vehicle registration fee calculator. Confirm current rules at iowadot.gov.