CT is $247.50 for my boat, at 39 feet. Quit belly-akin' and reach for your wallet.

And if you keep your out-of-state-registered boat in CT for more than 60 days per year they can require you to register and then you either have to pay 6% "use tax" on the "market value" or prove you paid that much in sales or use tax to your home state (or pay the difference if your home state tax is less).