Boat Insurance Calculator

What Does Boat Insurance Cover?

Boat insurance (also called watercraft or marine insurance) is a specialized policy that protects your vessel, your passengers, and your financial liability on the water. Unlike a standard home or auto policy, boat insurance is written specifically for the unique risks of watercraft operation.

Physical Damage Coverage

Covers damage to your boat from collisions, sinking, fire, theft, vandalism, storms, and other covered perils. There are two main types:

• Agreed Value — Pays the full insured value with no depreciation. If your boat is totaled, you receive the full agreed amount. Generally the better choice for newer or higher-value boats.
• Actual Cash Value (ACV) — Pays the depreciated market value at the time of loss. Premiums are lower, but your payout shrinks as the boat ages. May leave you significantly underinsured on older vessels.

Liability Coverage

Covers bodily injury and property damage you cause to others while operating your boat. This is the most important coverage if you're on the water around other people, docks, and vessels. Most policies offer limits from $100,000 to $1,000,000. Serious accidents — a collision injuring multiple people, or sinking another vessel — can easily exceed $100,000 in liability.

Medical Payments

Pays medical expenses for you and your passengers injured on the boat, regardless of who was at fault. Typically $1,000–$10,000 per person. Relatively inexpensive to add and valuable for guests who may not have robust health insurance.

Uninsured/Underinsured Watercraft

Covers your injuries and damages if you're hit by an uninsured or underinsured boater. Unlike auto insurance, boat insurance requirements vary dramatically by state — many states don't require any boat insurance at all, meaning a significant portion of boaters on the water have no coverage.

Towing and Assistance

Covers on-water towing if your boat breaks down — similar to roadside assistance for your car. Without this, a tow from open water can cost $500–$3,000+ depending on distance. Often offered as an add-on or through a membership service like BoatUS or Sea Tow.

Fuel Spill Liability

Covers costs associated with accidental fuel spills from your vessel — cleanup, fines, and third-party property damage. Federal law can hold boat owners liable for fuel spill cleanup costs. Most comprehensive boat policies include this; verify if you have inboard engines or large fuel tanks.

Trailer Coverage

Many boat policies extend to cover the trailer as well. If your trailer isn't covered under your boat policy, it may be covered under your auto policy while being towed — check both before assuming coverage exists.

Personal Effects and Equipment

Covers personal items on the boat — fishing equipment, electronics, water sports gear, clothing. Usually capped at $1,000–$5,000. High-value fishing equipment or navigation electronics may need to be scheduled separately.

What Affects Boat Insurance Rates?

• Boat value and type — Higher value and higher-performance vessels cost more to insure. A $100,000 offshore center console costs significantly more than a $15,000 pontoon boat.
• Horsepower — Higher horsepower boats are associated with higher accident severity and typically carry higher premiums.
• Where you boat — Offshore ocean use carries higher risk than a small freshwater lake. Saltwater also causes accelerated corrosion, which affects physical damage risk.
• Storage method — Boats stored in water (wet slips) are exposed to more weather and theft risk than boats stored at home. Dry stack storage at a marina is generally low-risk.
• Owner experience and age — Newer boaters and very young operators typically pay more. Completing a boating safety course (NASBLA-approved) can reduce premiums with many carriers.
• Navigational territory — Some policies specify geographic limits (Great Lakes only, coastal waters within X miles, etc.). Offshore or international navigational territory costs more.
• Claims history — Prior boating claims or moving violations affect rates similarly to auto insurance.
• Deductible selected — Higher deductibles reduce premiums. Typical deductibles range from $250 to $1,000 for physical damage coverage.

Is Boat Insurance Required?

Unlike auto insurance, only a handful of states legally require boat insurance (Arkansas and Utah, for example). However, marinas frequently require proof of liability insurance to rent a slip, and lenders typically require physical damage coverage if the boat is financed.

Even where not legally required, the financial case for liability coverage is strong. A serious boating accident can result in hundreds of thousands of dollars in liability — well beyond what most boat owners could pay out of pocket.

Does Your Homeowners Policy Cover Your Boat?

Many homeowners and renters insurance policies provide limited coverage for small boats — typically canoes, kayaks, and small motorboats under 25–50 HP. For larger or more powerful boats, homeowners coverage is usually inadequate or entirely absent. Even where homeowners coverage technically applies, the liability limits are often insufficient for a serious on-water accident.

A dedicated boat insurance policy is almost always the better choice for any motorized vessel or sailboat of meaningful value.

Tips for Lowering Your Boat Insurance Premium

• Complete a boating safety course. Most insurers offer a 5–15% discount for NASBLA-approved safety courses. The U.S. Coast Guard Auxiliary and Power Squadrons offer free or low-cost courses.
• Bundle with your home and auto insurer. Many carriers offer multi-policy discounts of 5–15% if you bundle boat insurance with your existing policies.
• Choose a higher deductible. Raising your physical damage deductible from $250 to $1,000 can meaningfully reduce premiums if you can comfortably self-insure smaller losses.
• Store your boat at home or in dry storage. Wet slip storage typically costs more to insure than dry storage due to weather and theft exposure.
• Pay annually instead of monthly. Many insurers charge installment fees. Paying the annual premium upfront can save 3–8%.
• Lay-up period discounts. If you don't use your boat during winter months, ask about lay-up or seasonal discounts. Some carriers reduce premiums for the months the boat is in storage.
• Maintain a clean boating and driving record. Prior claims and traffic violations affect boat insurance rates similarly to auto insurance.