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Idaho Car Sales Tax Calculator

The Idaho car sales tax calculator applies the state's 6% sales tax to the price after your trade-in allowance. Idaho's resort-city local option taxes generally don't reach a titled vehicle, so the state rate is effectively the whole rate. Enter your numbers to see the estimate.

Last reviewed: November 2, 2026Reviewed by Michael Steve

Calculate Your Idaho Car Sales Tax

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The selling price on your buyer’s order.

What the dealer credits you.

State
IdahoChange state

Condition

Idaho's sales tax applies to the price the dealer charges, which includes dealer fees, though government-imposed fees like titling are excluded.

Advanced options

Enter your own amounts where you know them. They replace our estimates.

Replaces the state estimate.

Replaces the state estimate.

Plates, inspections, add-ons.

Estimate only

Estimated out-the-door price

$0.00

Enter a vehicle price to see your estimate.

Vehicle price
$0.00
Trade-in
—
Taxable amount
$0.00
State sales tax (6%)
$0.00
Title fee
$0.00
Registration fee
$0.00
Dealer / documentation fee
—
Estimated total
$0.00
How this estimate was calculated

    Estimates are for informational purposes only. Actual taxes and fees may vary based on your location, vehicle, transaction and current state rules.

    Estimated Idaho Car Sales Tax

    State rate6%
    Local taxNone on vehicles
    Trade-inLowers taxable price
    Dealer feeTaxed with the price; limit not confirmed

    Idaho charges 6% sales tax on a vehicle purchase, which comes to $1,500.00 on a $25,000 purchase with no trade-in.

    A trade-in lowers the taxable price, but only when you buy from a licensed dealer; there is no trade-in allowance on a private-party sale.

    Some Idaho resort cities charge their own local option sales tax, but a titled vehicle is commonly excluded from it, so most buyers pay only the 6% state rate no matter where they register.

    Idaho Car Title and Registration Fees

    Idaho's title fee is $14. Registration is an annual fee set by vehicle age under Idaho Code: $69 for 1–2 years old, $57 for 3–6 years, or $45 for 7 years and older, plus county processing fees. We have not added one flat figure since it depends on your vehicle's age; enter your own amount under Advanced options.

    FeeAmountNotes
    Title feeTitle$14.00The standard title fee.
    Registration feeRegistrationVariesSet by the vehicle's age under Idaho Code: $69 for vehicles 1–2 years old, $57 for 3–6 years, or $45 for 7 years and older, plus county processing fees. Enter your amount under Advanced options.
    Dealer documentation feeSet by the dealerVariesTitle and registration fees separately stated on the invoice are not part of the taxable sales price. We have not confirmed a dollar limit on the dealer's own documentation fee.

    How Idaho Car Sales Tax Is Calculated

    1. Start with the purchase price.
    2. Subtract your trade-in allowance, if you're buying from a licensed dealer.
    3. Multiply the result by the state rate of 6%.
    4. Add the $14 title fee and your age-based registration fee to reach your out-the-door price.

    Some Idaho resort cities add a local option sales tax on retail purchases, but a titled vehicle is commonly excluded from that local tax, so it usually does not change what you owe.

    Idaho's registration fee is set by Idaho Code based on the vehicle's age, with county processing fees layered on, so check with your county assessor's motor vehicle office for the exact total. Read how a trade-in affects sales tax to see how Idaho's dealer-only trade-in rule compares with other states.

    Example Idaho Car Sales Tax Calculation

    This example assumes a dealer purchase, which qualifies for the trade-in deduction.

    Vehicle price$25,000.00
    Trade-in−$5,000.00
    Taxable amount$20,000.00
    State sales tax (6%)$1,200.00
    Title fee$14.00
    Registration feeNot included
    Estimated total$21,214.00

    This is an illustration, not a quote.

    Frequently Asked Questions About Idaho Car Sales Tax

    What is the car sales tax rate in Idaho?

    Idaho charges a 6% state sales tax on a vehicle purchase. Resort-city local option taxes generally don't apply to a titled vehicle, so most buyers pay only the 6% rate.

    Does a trade-in reduce Idaho sales tax?

    Yes, but only when you buy from a licensed dealer. There is no trade-in allowance on a private-party sale.

    Is the dealer documentation fee taxed in Idaho?

    The sales tax applies to the price the dealer charges, though separately stated government fees like titling are excluded from that price. We have not confirmed a dollar limit specifically for the dealer's own documentation fee.

    How much is the title fee in Idaho?

    The title fee is $14. Registration is a separate annual fee set by the vehicle's age: $69 for 1–2 years old, $57 for 3–6 years, or $45 for 7 years and older.

    Sources

    Taxes and fees change, so confirm exact amounts with the agencies above.

    Neighboring states

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