Idaho car tax
Idaho has no yearly car tax. Registration is a flat fee by vehicle age, plus county fees. A car purchase is taxed at 6% sales tax, with no local addition.
No yearly car tax; only registration fees.
Buying a car in Idaho: one-time tax
Idaho sales/use tax — 6%. Your trade-in is subtracted before tax.
Private-party sales are taxed when you title the car.
Registration and due dates
Registration costs about $45–$69 a year by age, plus county fees.
No yearly car tax. Registration renews every year or two.
Cut what your car costs in Idaho
Car tax is set by your town, but your loan and insurance aren't. Refinancing a car loan at a lower rate often saves more each year than the tax itself.
Questions
Does Idaho tax cars every year?
No. Only the age-based registration fee applies.
What sales tax applies to cars in Idaho?
6% state sales tax, with trade-in credit.
Can I deduct Idaho car taxes on my federal return?
Generally no. Idaho has no yearly value-based car tax, and flat registration fees cannot be deducted as personal property tax. Sales tax on the purchase can be deducted instead of income tax if you itemize.
Sources
Last checked October 14, 2026. Rates are for passenger cars owned by individuals; leased, business and specialty vehicles can differ. Confirm with your tax collector or commissioner of the revenue.