I keep mine in Quicken
As far any tax purposes are concerned, the only things worth tracking are the interest on your boat mortgage and any state or county property taxes...nothing else is deductable...and that's really not necessary because the lender SHOULD send you a statement of P&I paid each year. Although I do keep track of my boat expenses, I'm not sure you WANT to know what your boat is really costing you. The only reason I started doing it was because I wanted to track what it cost to restore my boat (a 1980 cruiser, purchased from an estate in non-running and uninhabitable condition)--the cost of repairs, replaced equipment and equipment added, separate from the usual maintenance costs, so that when it came time to sell it I'd know how much I actually had in it vs. its survey value (the plan going in was for them to come out at least even). Categories to track are mortgage, insurance, dock fees, maintenance & repairs, upgrades, fuel, and the ubiquitous "misc" costs that don't seem to fit anywhere else. I had a few more than that, but they wouldn't apply unless you're restoring a boat. And btw, if you still want to do this, set up a second copy of Quickbooks for personal use...don't co-mingle your personal boat expenses with your business expenses.
