Connecticut Boat Sales Tax: 2.99% Rate, Exemptions, and Trade-Ins

Connecticut boat sales tax is 2.99% of the purchase price, roughly half the state’s standard 6.35% sales tax rate.¹ The reduced rate covers vessels, outboard motors, and trailers designed to transport a vessel, whether you buy from a dealer or in a private sale. Several exemptions can eliminate the tax entirely, and a trade-in credit can shrink the taxable amount when you buy through a licensed dealer.

What the 2.99% Rate Covers

Under CGS §12-408(1)(E)(ii), the 2.99% rate applies to sales of vessels, motors for vessels, and vessel trailers.¹ It took effect July 1, 2018, replacing the standard sales tax rate that previously applied to boat purchases.² Everything else in Connecticut is still taxed at 6.35%, so the marine carve-out is a real savings on what are usually large purchases.³

When you buy from a dealer, the dealer collects the tax at the point of sale on the full sale price. In a private transaction between two individuals, you pay the tax when you register the vessel at the DMV.² The rate is the same either way. Fail to pay when it’s due and the Department of Revenue Services adds interest at 1% per month on the unpaid balance.⁴

Buying a Boat Out of State

Shopping in Rhode Island, New York, or elsewhere doesn’t get you around the Connecticut tax. The state imposes a use tax at the same 2.99% rate on vessels brought into Connecticut for use here.³ The use tax exists to close exactly that cross-border loophole.

There is a seasonal exception. From October 1 through April 30, a vessel that enters Connecticut solely for winter storage, maintenance, or repair is not subject to use tax.⁵ Hauling an out-of-state boat to a Connecticut boatyard for off-season work won’t trigger a bill, so long as you don’t use it recreationally during that window.

If you already paid sales tax to another state on the same vessel, Connecticut issues Form AU-677 to document that payment. Many states offer reciprocal credits, and presenting AU-677 can help you avoid being taxed twice on the same boat.⁵

Exemptions That Eliminate the Tax

Four exemptions can wipe out the 2.99% tax entirely. Each has its own form and eligibility rules, and the paperwork has to be right at the time of purchase.

Docked 60 Days or Fewer

A vessel is fully exempt if it will be docked in Connecticut for 60 or fewer days in a calendar year.¹ This isn’t limited to out-of-state residents. Anyone who keeps their boat in Connecticut waters two months or less per year qualifies, whether the days are consecutive or scattered.

To claim it from a Connecticut dealer, give the retailer a completed CERT-143 at the time of sale.⁶ The exemption has to hold in the year of purchase and every year after. Exceed 60 days in any later calendar year and you’ll owe the tax retroactively, so keep records of your docking schedule.

Nonresident Purchases

A separate exemption under CGS §12-412(60) covers nonresidents who buy in Connecticut without planning to keep the boat here. Three conditions must be met: you don’t maintain a permanent home in Connecticut, the vessel won’t be registered with the Connecticut DMV, and you give the retailer Form CERT-125 at the time of purchase.⁷

“Permanent place of abode” is read broadly. It includes any dwelling permanently maintained by the buyer in the state, even one owned by a spouse or rarely used. Businesses can also qualify, but only if the entity has no Connecticut presence and no partner, officer, or vessel operator keeps a permanent home in the state.⁷

One catch worth knowing: this nonresident exemption covers the vessel but does not extend to boat trailers. A trailer bought alongside the boat stays taxable even if the vessel itself qualifies.⁷

Commercial Fishing Vessels

Vessels used exclusively in commercial fishing are fully exempt under CGS §12-412(40), provided the buyer holds a valid Commercial Fisherman Tax Exemption Permit issued by the Department of Revenue Services.⁸ The permit runs two years. Machinery and equipment used on a qualifying commercial fishing vessel is also exempt.⁹

Qualification generally requires showing that at least 50% of your gross income (as reported on your federal return) came from commercial fishing in the prior tax year, or averaged over the prior two years. Start-up fishermen without that history can qualify by committing to operate commercially for at least two years. Buyers who recently acquired an existing commercial fishing business from a permit holder have a separate path.⁸

Gift Transfers

A vessel received as a gift is not subject to sales or use tax. The donor signs Form AU-463, a gift declaration, and can receive nothing in return: no cash, property, services, or assumption of debt.¹⁰ If any consideration changes hands, the DRS won’t treat it as a gift, and the full 2.99% applies to the vessel’s value.

Trade-In Credit

Trading in your current boat when buying a new one through a licensed dealer cuts the taxable amount. Under CGS §12-430(4), tax applies only to the difference between the new vessel’s sale price and the trade-in value.¹¹ On a $90,000 boat with a $35,000 trade-in, the 2.99% applies to $55,000 rather than the full price, saving roughly $1,047.

Two limits. The trade-in has to close at the same time as the new purchase; you can’t sell your old vessel to the dealer one week and come back for the new one the next.⁷ And the credit is only available through licensed retailers. A private-party swap between two boat owners doesn’t qualify.¹¹

Where and When You Pay

Buy from a dealer and the dealer collects the tax at closing. Buy from a private seller and the DMV collects it at registration based on the purchase price.² If the tax was already paid to a dealer, the DMV won’t charge it again.

Miss the deadline and interest runs at 1% per month on the outstanding balance until paid.⁴

Two Common Misconceptions

Federal documentation with the U.S. Coast Guard doesn’t exempt a boat from Connecticut tax. A documented vessel still owes the 2.99% sales or use tax and still needs a Connecticut registration. The one practical difference is that a USCG-documented vessel doesn’t get a separate Connecticut title, because the federal documentation serves that function; the state issues a registration using the documentation numbers instead.²

Boats are, however, exempt from local property tax in Connecticut. The legislature replaced the old municipal property tax on vessels with the annual state registration fee, which is based on length rather than assessed value.¹² One annual fee to the state, with no separate town assessment.

1
Justia. Connecticut Code Title 12 – Section 12-408 The Sales Tax
2
Connecticut Department of Motor Vehicles. Documents Required for Vessel Registration and Certificate of Title
3
Connecticut State Department of Revenue Services. Individual Use Tax Information
4
Justia. Connecticut Code Title 12 – Section 12-722 Underpayment and Nonpayment of Estimated Tax by Individuals
5
Connecticut State Department of Revenue Services. IP 2006(12) Q and A on Purchases of Vessels
6
Connecticut Department of Revenue Services. CERT-143 Sales and Use Tax Exemption for Purchases of Vessels Docked in Connecticut for 60 or Fewer Days
7
Connecticut State Department of Revenue Services. SN 2000(2) Application of Sales and Use Taxes to Vessels
8
Connecticut State Department of Revenue Services. IP 2021(4) Commercial Fisherman Tax Exemption Permit
9
Connecticut State Department of Revenue Services. Statutory Exemptions for Certain Sales
10
Connecticut Department of Motor Vehicles. Learn About Sales Tax on First Time Vehicle Registrations
11
Justia. Connecticut Code Title 12 – Section 12-430
12
Connecticut General Assembly. State Registration of Motor Boats and Aircraft