Idaho Car Sales Tax Calculator
The state vehicle sales tax rate in Idaho is 6% — a mid-range in the US. Estimate the tax due and out-the-door total for any car price below.
State rate only This is the state vehicle tax. County/city taxes, title, registration and documentation fees are extra and vary by locality — verify the total with your DMV.
Note State rate only; county/city taxes, title and registration fees are extra — verify with your DMV.
Idaho car sales tax by price (at 6%)
| Car price | State tax | Out-the-door |
|---|---|---|
| $15,000 | $900 | $15,900 |
| $25,000 | $1,500 | $26,500 |
| $40,000 | $2,400 | $42,400 |
| $60,000 | $3,600 | $63,600 |
Out-the-door = price + state tax only. Local tax, title, registration and doc fees are extra.
How to estimate car sales tax in Idaho
- 01 Enter your negotiated vehicle price.
- 02 Add any trade-in value — it lowers the taxable amount where the state allows a credit.
- 03 The 6% Idaho state rate is pre-filled — add your local rate for a closer number — and read the tax and out-the-door total.
Frequently asked questions
What is the car sales tax rate in Idaho?
The Idaho state vehicle sales tax rate is 6%. This is the state rate only — many counties and cities add local sales tax on top, and title, registration and documentation fees are separate.
How much is sales tax on a $30,000 car in Idaho?
At the Idaho 6% state rate, a $30,000 car has about $1,800 in state sales tax (before any local tax), for an out-the-door figure of roughly $31,800 plus DMV fees. A $40,000 car would be about $2,400 in state tax.
Does a trade-in reduce car sales tax in Idaho?
Idaho taxes the price after trade-in.
Are county and city taxes included in this Idaho estimate?
No. This shows the Idaho state rate only of 6%. Local county, city and district taxes are added on top in most states, and title, registration and documentation fees are separate. Your final out-the-door price depends on where the car is registered — always confirm with your DMV.
Do I pay Idaho car sales tax where I buy or where I live?
You generally pay vehicle sales/use tax based on where the car is registered — your home state and address — not where the dealership is. Buying in a lower-tax state does not avoid your home state's tax when you register the car.
Is this Idaho car sales tax calculator free?
Yes — it is completely free, needs no sign-up, and runs entirely in your browser. Nothing you enter is uploaded anywhere.
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