Overview
The fee applies identically whether you buy from a dealer or a private party, and both get the same trade-in deduction - a real difference from states that only let dealers subtract a trade-in. What Iowa does watch closely is private-party pricing: if your bill of sale price looks well under the car's NADA or Kelley Blue Book value, the county treasurer can charge the 5% against that book value instead. A true no-money gift, on the other hand, is simply 5% of zero - just the $10 base.
01 - Official fees
Iowa car sales tax fees at a glance
| Fee | Amount | Notes |
|---|---|---|
| Standard rate | $10 + 5% | dealer and private sales, statewide, no county add-on |
| Taxable base | price − trade-in − rebate | |
| Suspiciously low private-sale price | 5% of NADA/KBB value | treasurer's discretion |
| Genuine no-payment gift | $10 flat | 5% of $0 |
| Credit for tax paid to another state | Dollar-for-dollar | against their sales/use tax already paid |
Figures verified June 2026 against official sources (listed below). Always confirm the final amount with your county treasurer (Iowa DOT) - counties can add small local fees.
03 - Same state, other costs
More Iowa vehicle costs
04 - Common questions
Iowa car sales tax FAQ
Wait, Iowa has no sales tax on cars at all?
Right - 0% under the sales tax code. Iowa instead levies the Fee for New Registration under Chapter 321: $10 plus 5% of the purchase price, paid to your county treasurer alongside the title and registration, not filed as a tax return.
Do private-party buyers get the same trade-in deduction as dealer customers?
Yes. Unlike some states that reserve trade-in credit for dealer transactions, Iowa subtracts a documented trade-in's value from the purchase price regardless of who you bought from - as long as it's recorded on the bill of sale.
What is Iowa's version of a 'presumptive value' check on private sales?
There's no formal published table like Texas's SPV, but Iowa Department of Revenue guidance lets the county treasurer compare your reported price against NADA or Kelley Blue Book fair market value. If your price looks implausibly low for the vehicle's condition, they can assess the 5% fee against the book value instead.
Is a $1 'gift' sale treated differently from a real $0 gift?
Practically not much - 5% of $1 rounds to nothing, so either way you're paying the $10 base. The bigger risk with a token $1 sale is the treasurer questioning the price against book value; a documented $0 gift with a clear bill of sale is cleaner.
I already paid sales tax buying this car in another state - do I pay Iowa's fee too?
No, not twice. Iowa gives a dollar-for-dollar credit against the fee for new registration for legally required sales or use tax you already paid to another state. If that amount equals or exceeds what Iowa's fee would be, you owe nothing further.
Are any vehicle transfers fully exempt from the fee?
Yes - several narrow categories under 321.105A, including vehicles transferred by operation of law (some inheritances without a will), certain business reorganizations, charitable gifts, and a corporation gifting a vehicle to a retiring employee. Ordinary family sales and gifts are not automatically exempt; they follow the standard price-based formula.
05 - Receipts
Official sources
Every number on this page comes from these documents - check them yourself.