Real Idaho deals, worked out
Each example runs through the same calculator above, line by line, so you can check every number yourself.
1Boise: new car with a trade-in
A buyer pays $33,000 for a new car and trades in $9,000 at the dealer. The 6% tax is on $24,000.
| Vehicle price | $33,000.00 |
| Sales tax (6%) on $24,000.00 | $1,440.00 |
| Title fee | $14.00 |
| County title administration fee | $7.00 |
| Registration | $69.00 |
| Out-the-door | $34,530.00 |
| Due after the $9,000 trade-in | $25,530.00 |
2Private sale, eight-year-old car
A buyer pays a private seller $9,500. There's no trade-in credit, and registration is at the seven-plus year rate.
| Price paid | $9,500.00 |
| Sales tax (6%) on $9,500.00 | $570.00 |
| Title fee | $14.00 |
| County title administration fee | $7.00 |
| Registration | $45.00 |
| Out-the-door | $10,136.00 |
Dealer and private sales
The 6% tax applies to the price or value of the car. On a dealer sale it's the price minus your trade-in. On a private sale there's no trade-in credit, and you pay the tax to the county assessor when you title the car.
Idaho car tax at common prices
What a new gas car bought from a dealer comes to at four prices. The trade-in column shows how much a $10,000 trade-in changes the tax under Idaho's rules.
| Price | Tax | Tax with $10,000 trade-in | Taxes + fees |
|---|---|---|---|
| $15,000 | $900.00 | $300.00 | $990.00 |
| $25,000 | $1,500.00 | $900.00 | $1,590.00 |
| $35,000 | $2,100.00 | $1,500.00 | $2,190.00 |
| $50,000 | $3,000.00 | $2,400.00 | $3,090.00 |
Title and registration
The state title fee is $14, and county assessors may add an administration fee; Ada County's total is $21. Passenger registration falls with age: $69 for one or two years old, $57 for three to six and $45 for seven or older. Electric cars pay an extra $140 a year and plug-in hybrids $75.
Idaho taxes and fees at a glance
Officialfrom a state agency sourceEst.varies or not yet confirmed
| Item (boise: new car with a trade-in) | Status | Amount |
|---|---|---|
| Sales tax (6%) | Official | $1,440.00 |
| Title fee | Official | $14.00 |
| County title administration fee | Estimate | $7.00 |
| Registration (yearly) | Official | $69.00 |
| Total taxes and fees | $1,530.00 |
Idaho car tax FAQ
What is the sales tax on a car in Idaho?
6% of the price; on a dealer sale it's the price minus your trade-in.
Does a trade-in lower Idaho sales tax on a private sale?
No. Trade-in credit only applies to licensed dealer sales.
How much is Idaho car registration?
$69 for one or two years old, $57 for three to six years and $45 for seven or older, plus county fees.
Sources
We build every number from these agency pages. If something has changed, tell us and we'll fix it.