On a big boat, the state you register in can swing your tax bill by tens of thousands of dollars. Enter the price and pick a state to get the exact sales or use tax — with the caps that actually apply (Florida stops at $18,000, North Carolina at $1,500, New York taxes only the first $230,000). It handles trade-in credits, county surtax and zero-tax states, then shows you the cheapest tax havens side by side for your purchase.
Tax is the state rate applied to the taxable base (price minus any trade-in), then limited by the state's statutory cap where one exists. New York is modeled as a rate on the first $230,000 of price. Florida adds an optional county discretionary surtax on the first $5,000 only, and the combined total is then capped at $18,000. Zero-tax states return $0. The effective rate is tax divided by price, which falls below the headline rate once a cap is reached.
Rates and caps reflect 2026 figures and are editable in the tool's data table. Sources include the Florida Department of Revenue (GT-800005), state revenue departments, and industry tax guides (RN Marine, Denison Yacht Sales). Boat tax is generally a use tax owed where the vessel is kept; commercial vessels, property taxes and special exemptions are not modeled. This is a planning estimate, not tax advice — confirm with a marine tax professional.