Estimate your annual and monthly boat insurance premiums.
Current market value in USD
Length overall in feet
Years since manufacture
"My Boat Plans" is a collection of over 500 boat plans, from simple dinghies to larger cruisers. It includes step-by-step guides, video tutorials, and more.
Download NowBoat insurance is priced off a handful of ratings multiplied against the hull's value, and the insurance calculator unpacks that logic so you can see, before a broker does, what a policy is likely to cost and why. It starts from a base premium rate and scales it by the factors underwriters actually weigh.
The engine of the model is a percentage-of-value base rate, roughly 1.5 percent, adjusted by multipliers for boat type, age, where you keep and cruise it, your experience, your claims history and how the boat is used, chartering and racing loading the premium hardest. From the adjusted rate come the annual and monthly premium, plus hull and liability cover and a typical deductible.
Enter the boat's value, type, length, age, location, experience, claims and usage, and the calculator estimates your annual and monthly premium alongside the coverage figures a stated-value policy would carry.
Base Rate = 1.5% × Type × Age × Location × Experience × Claims × Usage Multipliers; Annual Premium = Value × Adjusted Rate; Deductible ≈ max(500, 2% of Value)| Factor | Lower Premium | Higher Premium |
|---|---|---|
| Usage | Recreational 1.0 | Racing 2.2 |
| Location | Inland 0.85 | Hurricane zone 1.5 |
| Experience | Experienced 0.85 | Novice 1.3 |
| Claims | None 0.9 | Multiple 1.5 |
Rating multipliers that move the premium.
Formula verified against standard naval-architecture references · Updated October 2026
Roughly one to two percent of the insured value a year for many pleasure boats, adjusted by ratings, so a 100,000 dollar sailboat in low-risk use might run near 800 to 1,000 annually. The calculator applies the type, age, location, experience, claims and usage multipliers to that base so you get a boat-specific estimate rather than a rule of thumb.
Usage and location. Chartering around 1.8 and racing near 2.2 multiply the base far more than any other single factor, and keeping the boat in a hurricane zone or cruising offshore adds substantially too. Experience, age and a claims history also push the rate, but a change in how and where the boat is used moves the number most.
Commonly as a percentage of hull value, often around two percent, which the calculator models with a floor so small boats still carry a workable first-loss share. Choosing a higher deductible lowers the premium and makes sense if you can fund a modest repair yourself; the trade-off between what you pay yearly and what you pay at claim time is yours to set.
Yes, insurers rate a documented experienced skipper lower, around 0.85 here, and a novice higher, near 1.3, on the logic of risk. Courses, on-water time and a clean record support the lower band, so the calculator lets experience pull the estimate down and mirrors why the same boat costs different owners different money.
One where you and the insurer agree on the hull's value up front and a total loss pays that figure without depreciation argument. The calculator treats the value you enter as that insured amount and sets hull coverage to it, which is why choosing an honest, defensible value matters: it drives both your annual cost and your payout.
Directional, not binding. It reflects the rating logic carriers use so you can budget and spot whether a quote is reasonable, but final premiums depend on a survey, the carrier's appetite and details no model sees, so treat the output as an informed first guess to verify with a real quote.