Idaho Vehicle Registration Fee Calculator
2026Registering a car in Idaho in 2026 costs about $122.75 a year ($106.75 by the fifth year) for a new $35,000 midsize sedan in Ada County (Boise); electric cars pay $140.00 a year more. Estimate yours by state, vehicle age and fuel type.
By Konstantin Iakovlev · Updated October 19, 2026 · Methodology
Yearly Registration Cost
$122.75
One-Time Title and Plates
$31.80
Fee Breakdown
| State registration fee (by age) | $69.00 |
| Ada County highway district fee | $40.00 |
| Ada County admin fee | $9.50 |
| EMS and Idaho State Police fees ($1.25 + $3) | $4.25 |
| Yearly Total | $122.75 |
| Title fee (one-time) | $21.00 |
| Plates (one-time) | $10.80 |
Estimate for a 2026 gasoline midsize sedan (3,400 lb, $35,000 new) registered in Ada County (Boise). Other vehicles cost more or less, especially in states that charge by value or weight.
Idaho's state fee depends on the car's age: $69 at 1–2 years old, $57 at 3–6 and $45 at 7 or older. Ada County adds an age-tiered highway district fee and a county admin fee.
Based on Boise in Ada County. The highway district fee applies only in Ada County, and county admin fees range from $3 to $14. Elsewhere year 1 is about $73.25 ($69 state fee plus $4.25 EMS and state police fees) plus the county admin fee.
Ada County's highway district fee and a $3 state fee come from the state's online fee estimator; if the $3 fee does not apply, subtract $3.
Source: Idaho ITD DMV Vehicle Registrations page; Idaho Code 49-402; ITD Registration Estimator
Disclaimer: This calculator is for informational purposes only and does not constitute tax, financial, or legal advice. Results are estimates based on the information you provide and current rates. Always consult a qualified tax professional or financial advisor for advice specific to your situation.
Idaho Vehicle Registration Costs (2026)
Registering a new car in Idaho costs about $122.75 a year ($106.75 by the fifth year) for a new $35,000 midsize sedan in Ada County (Boise). Idaho's state fee depends on the car's age: $69 at 1–2 years old, $57 at 3–6 and $45 at 7 or older. Ada County adds an age-tiered highway district fee and a county admin fee.
Falls to $106.75 by the fifth year, when the car moves to the 3–6-year tier for both the state and county fees.
Based on Boise in Ada County. The highway district fee applies only in Ada County, and county admin fees range from $3 to $14. Elsewhere year 1 is about $73.25 ($69 state fee plus $4.25 EMS and state police fees) plus the county admin fee.
A title costs $21 in Ada County ($14 state plus $7 county), and new standard plates cost $10.80.
Idaho adds $140 a year for an electric car and $75 for a plug-in hybrid on top of other registration fees; hybrids pay nothing extra. The amounts are set in law and not indexed to inflation.
Ada County's highway district fee and a $3 state fee come from the state's online fee estimator; if the $3 fee does not apply, subtract $3.
Idaho Registration Costs (2026)
| Yearly Cost, New Car | $122.75 |
| Yearly Cost, 5-Year-Old Car | $106.75 |
| How the Fee Is Set | By age |
| Title Fee (one-time) | $21.00 |
| Extra Fee for Electric Cars | $140.00/yr |
| State Tax When You Buy a Car | 6.00% |
Official Sources: