Boat sales & use tax calculator

Use tax follows the boat — that's the whole game

Nearly every boat-tax mistake comes from thinking about the wrong transaction. Buyers focus on sales tax at the point of sale, so they shop for a broker or a delivery state with a low or zero rate. But a boat isn't a case of wine — it lives somewhere, visibly, for years. The tax that actually attaches is use tax: the tax the state where the vessel is principally moored, docked, or used charges for the privilege of keeping it there. Buy tax-free and moor in Florida, and Florida's use tax follows the boat to the slip. This calculator asks for the mooring state for exactly that reason.

Rates, and the caps that change everything

Headline rates cluster in the 3%–8% range, but the story for a valuable boat is the per-vessel cap. Florida charges 6% plus a county discretionary surtax, yet caps the total at $18,000 per boat — so a $2 million yacht and a $300,000 one both top out at $18,000. South Carolina's cap is a remarkable $500. Maryland runs a 5% vessel excise capped at $16,100 (the cap rises $100 each July). A cap means an expensive boat can pay a far lower effective rate than the sticker percentage implies, and it's a major reason mooring state is a real financial decision, not a formality.

No-tax states, and the honest limit of the trick

Montana, New Hampshire, Oregon, Delaware, and Alaska levy no general sales or use tax, so a boat genuinely kept there owes $0 in state sales/use tax. That's the honest version. The dishonest version — titling the boat to a Montana or Delaware LLC while it actually sits in a Miami or San Diego marina — does not work. Use tax is triggered by the boat's physical presence and use in a state, not by the name on the title. Florida, California, and South Carolina run audits that walk the docks and cross-reference registrations precisely to catch out-of-state shells on locally moored vessels. When they find one, the tax comes due with penalties and interest on top.

What the estimate leaves out

• Local surtaxes and rates — Florida county surtaxes and California's local mooring-district rates (roughly 7.25%–10.75%) sit on top of the state base.
• Trade-in and prior-tax credits — a trade-in can reduce the taxable base, and most states credit sales/use tax you've already paid to another state.
• Time-and-presence tests — California's 12-month test and other states' day-count rules decide whether use tax attaches at all.
• Annual and property taxes — Washington adds a 0.5% annual watercraft excise; several states levy personal-property tax on boats every year, separate from the one-time sales/use tax here.

Where an LLC does and doesn't help

An LLC is a genuinely useful holding structure for a boat: it separates the vessel's liability from your personal assets, simplifies co-ownership and charter arrangements, and can ease succession. What it is not is a sales-tax dodge. Form the LLC because you want the liability and ownership benefits — then handle titling, Coast Guard documentation, insurance, and use tax with your broker, marine attorney, and tax advisor, who know your boat's home water. FilingDesk forms the holding LLC for a flat $99 + the state fee — describe the entity in plain English and a specialist files it. The boat-specific steps stay where they belong: with you and your marine pros.

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.