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Local rate is an estimate (statewide average). Verify with your county clerk.
Vehicle purchases taxed at the state general sales tax rate; local taxes may add. Doc fees, rebates and add-ons may or may not be taxable depending on the state; not modeled.
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Idaho car sales tax, at a glance: 6% state tax on vehicle purchases. Vehicle purchases taxed at the state general sales tax rate; local taxes may add. Trade-in credit: allowed. A $30,000 car owes about $1,800 in state tax, or $1,200 with a $10,000 trade-in.
Base sales tax: Tax Foundation, Facts & Figures 2026, Table 18 (State & Local Sales Tax Rates), as of January 1, 2026. Vehicle rules: Best-effort, checked October 12, 2026.
| Vehicle price | State tax, no trade | With $10,000 trade-in |
|---|---|---|
| $15,000 | $900 | $300 |
| $20,000 | $1,200 | $600 |
| $25,000 | $1,500 | $900 |
| $30,000 | $1,800 | $1,200 |
| $40,000 | $2,400 | $1,800 |
| $50,000 | $3,000 | $2,400 |
| $60,000 | $3,600 | $3,000 |
State-level tax only; add your county or city rate in the calculator above.
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6% at the state level. Vehicle purchases taxed at the state general sales tax rate; local taxes may add. Local taxes may add. On a $30,000 car with no trade-in that's about $1,800 in state tax.
Yes. Idaho generally taxes the price minus your trade-in value, so a $10,000 trade-in on a $30,000 car cuts the state tax from $1,800 to $1,200. (Best-effort; verify with the state DMV or revenue department.)
Idaho's statewide general sales tax is 6% (Tax Foundation, Facts & Figures 2026, Table 18 (State & Local Sales Tax Rates), as of January 1, 2026); the rate applied to vehicles is 6%.
Usually, but we don't have an exact county/city table yet. A few resort cities levy local option taxes; most of Idaho is 6% only. Why still an estimate: Idaho publishes no official table of which resort-city taxes reach vehicle purchases. We pre-fill the 0.03% statewide average local rate as an estimate (Tax Foundation, Facts & Figures 2026, Table 18 (average local sales tax rate, as of January 1, 2026)); enter your own rate for accuracy.
No. Those vary by dealer, county, vehicle weight and value. The auto loan calculator for this state lets you add a doc fee and title/registration.
No. Estimates from best-effort state rules, not tax or financial advice; confirm with your state agency or dealer.
Estimates, not financial advice. Taxes, insurance, PMI and fees vary by lender, county and city; confirm with your lender, dealer and state agency before acting.