I have Progressive insurance for my home, cars, boat, etc.... of which I believe my boat policy is around $600 for the year and I've not considered removing it in the event of a tree falling and hitting it or something doing some sort of damage. Even if Progressive did do a 6 months thing, I'm not sure it would be worth the risk at saving $300 for those 6 months in the even that something did happen to the boat. To me, it's a situation of way too many "what if's?" and especially if my homeowners insurance didn't cover the potential damages done to it. If you've got your boat in a locked garage on your property, or even in your driveway and your homeowners insurance policy did cover your boat, then that might be a different story. Every company and every policy is slightly different though, so you'd have to see exactly what your homeowners insurance policy covers, and more importantly what it doesn't cover. If you kept your boat in a locked garage on your property with no trees around or really anything else that could possibly damage the boat, as well as if your homeowners insurance covered it in the event of their being an issue? I'd say go for it if the insurance company will let you.