The Idaho auto loan calculator estimate for a $35,000 new car with $3,500 down, financed over 60 months at today's MonitorBankRates Idaho average new auto loan APR of 5.70% with the Idaho vehicle sales tax of 6.00% and $300 in fees added to the loan, is a monthly car payment of about $651, or about $724 a month with the average Idaho car insurance premium included, verified by MonitorBankRates as of September 24, 2026.
Lenders serving Idaho currently advertise auto loan APRs from 3.79% to 4.34% across the 5 offers listed below. This calculator finances what a Idaho dealer actually finances: the price minus your down payment and trade in, plus Idaho sales tax and fees. The APR is today's MonitorBankRates Idaho average; switch to used with one click or apply a verified lender APR from the panel below. The same loan at the Idaho used car average of 6.12% costs about $657 a month.
Idaho Car Payment Estimator
Prefilled with the MonitorBankRates Idaho average APR, the Idaho sales tax rate and average insurance. Results update as you type.
Where the amount financed comes from
| Vehicle price | $0 |
| Idaho sales tax | $0 |
| Title, registration and fees | $0 |
| Down payment | $0 |
| Trade in | $0 |
| Amount financed | $0 |
Loan balance over time
Amortization schedule (yearly totals)
| Year | Principal Paid | Interest Paid | Ending Balance |
|---|
Current Idaho Average Auto Loan Rates
Today's MonitorBankRates Idaho averages first, then the lowest verified new and used offers from lenders serving Idaho. Click any APR to run it through the calculator.
Auto Loan Offers in Idaho and the Payment on a $35,000 Car
Monthly payment on the example loan ($33,900 financed after $3,500 down, Idaho tax and fees) at each lender's advertised APR and term, from rate sheets published by the lender and verified by MonitorBankRates.
- Responders Emergency Services Credit UnionNew & Used Automobiles and Street Motorcycles3.79% APR$621 a month over 60 months
- CUTTING EDGENew Auto3.99% APR$624 a month over 60 months
- Pioneer Federal Credit UnionNew and Used Vehicles Loan4.24% APR$628 a month over 60 months
- Lewis Clark Credit UnionAutos4.25% APR$628 a month over 60 months
- Rails West Federal Credit UnionAuto Loan4.34% APR$630 a month over 60 months
Compare every new and used auto loan, local banks and credit unions first, on the Idaho auto loan rates page.
View Your Idaho Auto Loan Rate
Personalized auto loan offers from lenders serving Idaho.
What a Car Loan Costs in Idaho Right Now
| $35,000 new car, $3,500 down, Idaho tax and fees: $33,900 financed at the MonitorBankRates Idaho average of 5.70% | Monthly | Total interest |
|---|---|---|
| 36 months | $1,027 | $3,063 |
| 48 months | $792 | $4,094 |
| 60 months | $651 | $5,144 |
| 72 months | $557 | $6,211 |
| 84 months | $490 | $7,296 |
Idaho sales tax adds $2,100 to a $35,000 car, which at 5.70% over 60 months is about $40 of the monthly payment. Because Idaho taxes the price after the trade in, trading in a $10,000 car at the dealer saves $600 in tax compared with selling it privately. The Idaho average APR of 5.70% is below the U.S. average of 5.88%. Add the average Idaho car insurance premium of $73 a month and the car costs about $724 a month to keep on the road before fuel and maintenance, which is 11.2% of the Idaho median household income of $77,800. Rates change daily; every figure on this page is recalculated when it loads from the current MonitorBankRates Idaho average.
Car Payments by Price in Idaho
10% down, Idaho sales tax of 6.00% and $300 in fees financed, 60 months at the MonitorBankRates Idaho averages for new (5.70%) and used (6.12%) cars.
| Price | Down | Idaho tax | Amount financed | New car payment | Used car payment |
|---|---|---|---|---|---|
| $15,000 | $1,500 | $900 | $14,700 | $282 | $285 |
| $25,000 | $2,500 | $1,500 | $24,300 | $466 | $471 |
| $35,000 | $3,500 | $2,100 | $33,900 | $651 | $657 |
| $45,000 | $4,500 | $2,700 | $43,500 | $835 | $843 |
| $60,000 | $6,000 | $3,600 | $57,900 | $1,111 | $1,123 |
Buying a Car in Idaho: Tax, Fees and Insurance
Sales tax. State rate of 6%. Dealers add the tax to the amount financed unless you pay it at signing, so it costs interest for the life of the loan.
Trade in. In Idaho the trade in value is subtracted before tax is figured, so a $10,000 trade in saves $600 in tax on top of lowering the loan.
Fees. Title, registration and plate fees are set by the Idaho motor vehicle agency and vary by vehicle; dealer documentation fees are set by the dealer and run from about $100 to more than $800 depending on the state. The calculator uses $300 as a placeholder; replace it with the figures on your buyer's order.
Insurance. The average Idaho car insurance premium is about $880 a year, or $73 a month, according to the NAIC, compared with about $1,258 nationally. Lenders require full coverage on a financed car, so budget for it alongside the payment. Compare carriers on the Idaho car insurance page.
How to Use the Idaho Auto Loan Calculator
- Start from the Idaho defaults
The APR is today's MonitorBankRates Idaho average, the sales tax is the Idaho vehicle rate and the insurance line is the state average. Switch to used with one click.
- Enter the deal
Type the negotiated price, your down payment and trade in, and the fees from the buyer's order. Add your local tax rate if your county or city charges more than the state rate.
- Click a verified lender APR
The panel lists the lowest current new and used offers from lenders serving Idaho. One click applies that APR and term.
- Read the full monthly cost
The large figure is the loan payment. Payment plus insurance shows what the car costs each month to keep on the road.
Frequently Asked Questions About Car Loans in Idaho
What is the average auto loan rate in Idaho today?
The MonitorBankRates Idaho average new auto loan APR is 5.70% as of September 24, 2026, and the average used auto loan APR is 6.12%, computed every day from rates published by banks and credit unions lending in Idaho. Individual lenders currently advertise APRs from 3.79% to 4.34% for borrowers with strong credit; compare offers on the Idaho auto loan rates page.
How much is the car payment on a $35,000 car in Idaho?
With $3,500 down, Idaho sales tax of 6.00% and $300 in fees, the amount financed is $33,900. At the MonitorBankRates Idaho average new auto loan APR of 5.70% that is about $651 a month over 60 months, $792 over 48 months, or $557 over 72 months.
What is the sales tax on a car in Idaho?
State rate of 6%. On a $35,000 car the state rate of 6.00% comes to $2,100. The trade in value is subtracted before tax in Idaho.
Does a trade in reduce sales tax in Idaho?
Yes. Idaho charges sales tax on the purchase price minus the trade in, so a $10,000 trade in saves $600 in tax at the 6.00% state rate in addition to lowering the loan.
How much is car insurance in Idaho?
The NAIC average car insurance premium in Idaho is about $880 a year, or $73 a month, compared with about $1,258 nationally. Full coverage is required on a financed car, so the calculator adds the premium to the payment: about $724 a month for the example car.
What loan term should I choose?
The shortest term whose payment fits. On the $33,900 example at 5.70%, 48 months costs $792 a month, 60 months $651, and 84 months $490. The 84 month loan pays about $2,153 more interest than the 60 month loan and leaves you owing more than the car is worth for years.
How much should I put down on a car in Idaho?
At least 10% on a used car and 20% on a new one is the usual guidance. Twenty percent down on the $35,000 example, $7,000, cuts the payment by about $67 a month and reduces the time you owe more than the car is worth.
Auto Loan Calculators for Other States
Each state page starts from that state's MonitorBankRates average APR, vehicle sales tax rate and average car insurance cost. The national auto loan calculator compares the payment on the same car in every state.
