IDAHO CAR SALES TAX · 2026
Idaho car sales tax calculator
Idaho charges 6% sales and use tax on a car's price less any trade-in. On a $35,000 car with a $10,000 trade-in, bought from a dealer, the tax is $1,500.00.
Tax on this purchase
- Tax due
- $1,500.00
- Sales tax
- $1,500.00
- Taxed amount
- $25,000.00
- Trade-in subtracted
- $10,000.00
Idaho car sales tax by price
A new car from a dealer.
| Price | No trade-in | $10,000 trade-in |
|---|---|---|
| $20,000 | $1,200.00 | $600.00 |
| $35,000 | $2,100.00 | $1,500.00 |
| $50,000 | $3,000.00 | $2,400.00 |
| $75,000 | $4,500.00 | $3,900.00 |
Idaho car sales tax questions
How much is car sales tax in Idaho?
Idaho charges 6% sales and use tax on a car's price less any trade-in. On a $35,000 car with a $10,000 trade-in, bought from a dealer, the tax is $1,500.00.
Does a trade-in lower Idaho's car sales tax?
Yes. Idaho taxes the price less the trade-in. A $10,000 trade-in on a $35,000 car from a dealer saves $600.00. A private sale gets no trade-in deduction.
Is a manufacturer rebate taxed in Idaho?
No. A manufacturer rebate applied at the sale lowers the taxed price in Idaho: a $2,000 rebate saves $120.00.
Is a private car sale taxed in Idaho?
Yes. Idaho taxes a private sale at the same rate, with no deduction for a trade-in.
What the calculator leaves out
- This site has not confirmed whether local tax applies to vehicles in Idaho, so the calculator includes none.
Title, registration and plate fees, dealer fees, and any yearly tax on owning the vehicle are not included.