What is boat insurance? A plain-English guide

A typical boat insurance policy is actually five or six separate coverages bundled into one product. Any of them can be missing, limited, or priced poorly depending on the carrier. The rest of this guide walks each one.

1. Hull coverage

Hull coverage pays if your boat itself is damaged — collision, grounding, fire, theft, storm. Two things matter most here:

• Agreed Value vs. Actual Cash Value. Agreed Value settles total losses at the pre-agreed hull value. ACV settles at depreciated market value. The difference at claim time can be tens of thousands of dollars.
• Named perils vs. all risk. Named-perils policies cover only listed causes of loss. All-risk policies cover anything that isn't explicitly excluded. All-risk is the better structure for most boaters.

2. Liability coverage

Liability pays when you cause damage or injury to others — another boat, a dock, a swimmer. This is where the real catastrophic exposure lives. A collision with another vessel in Florida can generate injury claims in the seven figures.

Standard liability limits range from $100,000 to $1,000,000. For most boats over 25 feet, $500,000 is a reasonable floor. For yachts or anything regularly out in busy waters, $1M minimum — and an umbrella policy on top is worth considering.

3. Medical payments

Pays for medical bills for anyone injured on your boat — passengers, guests, water-skiers you're towing. Usually a modest limit ($5,000–$25,000). Worth it for the rare injury that doesn't rise to a liability claim.

4. Uninsured / underinsured boater

If someone else hits you and doesn't have enough coverage (or any), UBI pays for your injuries and damages. Boat insurance isn't required in most states — which means a meaningful percentage of boats are uninsured. UBI is worth adding.

5. Fuel spill + wreckage removal

Not glamorous, but required by federal law if you sink. If your boat sinks in a marina or channel, you're legally responsible for removing the wreck and cleaning up any fuel. Costs can easily exceed the boat's value. Most marine policies include this; some cap it low. Check the limit.

6. Towing + on-water assistance

An optional add-on that pays for commercial tow service when you break down or run aground. Without it, a single long tow can cost $500–$2,000+. With it, typically free or a small co-pay.

What boat insurance is not

• Warranty coverage. Mechanical breakdown isn't covered by marine insurance. That's what a marine extended warranty is for.
• Home insurance. Your homeowners policy might offer minimal coverage for a small dinghy; it will not cover your actual boat adequately. Don't rely on it.
• Auto insurance. Doesn't touch the boat at all. Trailer coverage is usually also separate.

What makes a good policy

• Agreed Value hull
• All-risk form
• Liability limits appropriate to your exposure ($500K minimum, $1M for most)
• Named storm deductible stated clearly (if in a coastal state)
• Navigation territory that matches where you actually go
• Reasonable fuel spill / wreckage limit ($500K+)

If you're starting from zero, a call to a marine insurance broker is the fastest way to get all six of these placed correctly. That's literally what we do at NBOA — one call, every option on the table, no carrier agenda.