Boat sales & use tax calculator

Want the full picture behind these numbers — how use tax follows the boat, every state's rate and per-vessel cap, the no-tax states, and where an LLC genuinely helps (and where it doesn't)? That all lives in our boat sales tax by state guide. This page is just the calculator.

Frequently asked questions

Is boat tax based on where I buy or where I keep the boat?

Where you keep it. Sales tax may apply at the point of sale, but the tax that really matters for a boat is use tax — owed by the state where the vessel is principally moored, docked, or used. Buy in a no-tax state and moor in Florida, and Florida's use tax follows the boat. That's why this calculator asks for the mooring state, not the purchase state.

Does forming an out-of-state LLC avoid the tax?

No. This is the single most common myth. Titling a boat in a Montana or Delaware LLC does not change where the boat physically sits — and use tax is triggered by physical presence and use in a state, not by the paper owner. States with big boating populations (Florida, California, South Carolina) actively audit for exactly this pattern: a high-value vessel moored locally but titled to an out-of-state shell. The tax, plus penalties and interest, still lands on the boat.

What is a tax cap and how does it help?

Several states cap the tax on a single vessel no matter how expensive it is. Florida caps sales/use tax at $18,000 per boat, so a $2 million yacht pays the same $18,000 as a $300,000 one. South Carolina caps it at just $500. Maryland caps its 5% vessel excise tax at $16,100 (as of July 1, 2026 — the cap rises $100 a year). Caps are why an expensive boat sometimes pays a far lower effective rate than the sticker percentage suggests — and why mooring state matters so much.

Do no-sales-tax states mean no boat tax?

For state sales/use tax, yes — Montana, New Hampshire, Oregon, Delaware, and Alaska levy no general sales or use tax, so a boat principally kept there owes $0 in state sales/use tax. But local taxes, registration fees, and personal-property taxes can still apply, and the moment the boat spends enough time in a taxing state, that state's use tax can attach. Keeping the boat where it isn't taxed is the only reliable way to not owe the tax.

How accurate is this estimate?

Treat it as a first-pass screen, not a bill. It applies each state's headline rate and single-vessel cap, but real liability turns on local surtaxes, trade-in credits, the exact date and length of your presence in the state, casual-sale rules, and credits for tax already paid elsewhere. County surtaxes in Florida and local rates in California move the number. Confirm with the state's revenue department or a marine tax specialist before you buy.

Rates and caps are estimates gathered July 2026 and simplified for a quick screen; several are approximate and each state's revenue department is the final word. This calculator and guide are general information, not legal or tax advice. FilingDesk is not a law firm or an accounting firm and does not give tax advice — confirm your boat's liability with the state and a marine tax specialist before you buy.