How Much Does It Cost to Register a Boat in Montana?
In Montana, boat registration is handled by the county treasurer (FWP sets boating rules) and renews once — registration is permanent. The fee is based on boat length — from $65.5 for the smallest class up to $295.5 for the largest per year. Non-motorized craft like kayaks and canoes are generally exempt (check local rules for sailboats). Boats with motors — including trolling motors on otherwise unpowered craft — almost always require registration.
Cost by boat size
| Boat | Per year | One-time (title etc.) |
|---|---|---|
| 14-ft motorboat | $0.00 | $75.80 |
| 20-ft motorboat | $0.00 | $305.80 |
| 28-ft motorboat | $0.00 | $305.80 |
| Kayak/canoe (no motor) | Free — exempt from registration | |
- Registration is one-time and permanent: $65.50 under 16 ft, $125.50 to 19 ft, $295.50 at 19 ft and over. A free FWP validation decal renews every 3 years.
- Sailboats 12 ft+ must register; canoes/kayaks/rafts are exempt.
Estimate your exact Montana cost
Your boat
- Permanent registration (by length)One-time — no renewal required$125.50
- Title fee$10.30
Estimate only — actual fees are set by your state and county at the time of registration. Data last reviewed 2026-07-16. This state's full local formula is not yet implemented; see the notes below the calculator.
All figures computed from official fee schedules — sources: https://www.yellowstonecountymt.gov/Treasurer/MotorV/schedules.asp — last reviewed 2026-07-16.