Montana Boat Registration Fee Calculator
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.
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.
Good to know
- 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.
What determines boat registration cost in Montana?
- Boat length (fee tiers)
- Motorized vs. non-motorized
- New registration vs. renewal (title/transfer fees apply once)
Frequently asked questions
Do I have to register a kayak or canoe in Montana?
Generally no — unpowered craft are exempt in Montana. But the moment you mount any motor, including an electric trolling motor, registration is required.
How often do I renew a boat registration in Montana?
Annually.
More Montana calculators
Boat Registration calculators for other states
Sources: https://mvdmt.gov/vehicle-registration/watercraft-registration/ — data last reviewed 2026-07-16.