Maine boat tax is 5.5% of the taxable watercraft price. A Maine resident who buys a $50,000 boat from a dealer owes $2,750 of sales tax, plus Inland Fisheries and Wildlife numbering and the town’s annual excise. Trade a $10,000 watercraft toward that $50,000 hull and tax falls to $2,200 on the $40,000 difference. Casual private purchases still owe use tax — $1,100 on a $20,000 boat. Nonresidents are not automatically tax-free. Leave Maine within 30 days with Form ST-A-113 and the sale in Maine can be exempt. Stay more than 30 days in the first 12 months and the exemption covers only 60% of the price, so you pay 5.5% on the other 40%. Confirm sales tax with Maine Revenue Services, then number the boat through IFW after the town excise is paid.
- How much is Maine boat sales tax and registration?
- The Maine tax rule
- Trade-in, dealer vs private
- No local sales tax — municipal excise instead
- IFW registration and town excise
- Nonresidents, gifts, documented vessels
- How to calculate Maine boat tax
- What this page does not estimate
- Two complete buying examples
- FAQ
- Before you sign
- Complete reference list
Pay sales or use tax, then pay the town, then number with IFW. Maine Revenue Services’ Business Guide (December 2025) states the 5.5% watercraft rate, trade-in, and nonresident rules. 36 M.R.S. §1760(25) is the watercraft nonresident exemption, including the 60% rule. Dealer trade and ST-A-113 live in MRS Instructional Bulletin 24. Registration, proof of sales tax, and the town excise stop are on Maine IFW Boating. The municipal excise schedule is 36 M.R.S. §1504.
How much is Maine boat sales tax and registration?
Budget 5.5% of the watercraft sale price after a like-kind watercraft trade-in. A resident dealer purchase at $50,000 is $2,750. The same boat with a $10,000 watercraft trade is $2,200. A private casual $20,000 purchase is $1,100 of use tax. Maine has no local sales tax on that 5.5%. Towns collect a separate annual municipal watercraft excise before IFW will issue a number. Inland registration, including the $1 agent fee, runs $41–$60 by horsepower; an inland PWC is $60; an inland 40-horsepower example is about $46. Tidal fees are lower on the IFW table — confirm the tidal line with IFW rather than copying the inland dollar. A short canoe’s length-tax component under §1504 is $6 (under 13 feet / canoes).
IFW will not number a new registration without proof of sales tax. That is why the 5.5% line and the town excise are not optional add-ons you can skip until next season. Dealers collect sales tax. Casual buyers remit use tax. Either way, the numbering office wants proof.
Keep the dealer invoice, the use-tax receipt, or ST-A-113 with the boat papers the same way you keep the hull identification number. IFW staff will ask for tax proof before they release a number. The town clerk will ask for the hull length and horsepower before they run §1504. Those two stops are sequential: town first, then IFW. Skipping the town is how a buyer with a paid 5.5% invoice still walks out of IFW empty-handed.
The expensive nonresident mistake is treating the 30-day rule as a permanent holiday. If you buy in Maine and leave by day 20 with ST-A-113, sales tax can be $0. If you keep the boat in Maine 45 days in that first year, the exemption applies only to 60% of the price. On $50,000, tax is 5.5% × 40% × $50,000 = $1,100 — not $0, and not the full resident $2,750.
Example 1: Resident dealer, $50,000, no trade
Scenario: Maine resident. Dealer sale. No watercraft trade-in.
$2,750 is the official resident dealer illustration. Excise and IFW are extra, not part of the 5.5%.
Example 2: Private casual $20,000
Scenario: Neighbor sale. Maine use tax applies to casual watercraft purchases.
Private does not mean tax-free in Maine. $1,100 is 5.5% of $20,000.
- Maine Revenue Services Business Guide (December 2025) — 5.5%; trade-in; casual use tax; nonresident
- Maine IFW Boating — registration fees; proof of sales tax; excise to the town
- 36 M.R.S. §1504 — municipal watercraft excise schedule
The Maine tax rule
Maine imposes sales tax when a retailer collects and use tax when you buy casually or bring a taxable watercraft into Maine use without that collection. The rate on watercraft is 5.5%. There is no city or county sales-tax overlay. What looks like a “local boat tax” in Maine is almost always the municipal watercraft excise in 36 M.R.S. §1504 — an annual town bill tied to length and horsepower, not a second 5.5%.
Nonresident exemptions sit in 36 M.R.S. §1760(25). Path A: a sale in Maine is exempt if the watercraft is sailed or transported out within 30 days (ST-A-113). Path B: an out-of-state purchase is exempt if the boat is registered and used outside Maine and is present in Maine 30 days or less in the first 12 months, not counting temporary storage. Path C: if you are present more than 30 days in that first year, the exemption applies only to 60% of the sale price, which means tax on 40% of the price at 5.5%.
Example 1: Nonresident buys in Maine and leaves on day 20
Scenario: Out-of-state buyer. Maine dealer. Boat is gone from Maine by day 20. ST-A-113 affidavit on file.
The affidavit is the file. Leaving in three weeks is what Path A requires. Do not skip ST-A-113 and assume the dealer will remember you were from away.
Example 2: Nonresident stays 45 days in the first 12 months
Scenario: Same $50,000 boat. Present in Maine 45 days that first year. Exemption only as to 60% of price.
$1,100 is the Path C result on $50,000. It is not $0 and it is not $2,750.
- 36 M.R.S. §1760(25) — nonresident watercraft exemptions, including the 60% rule
- MRS Business Guide (December 2025) — 5.5% watercraft rate
- MRS IB24 — ST-A-113
Trade-in, dealer vs private
A Maine dealer collects 5.5% on the taxable base and you leave with proof IFW will want. A casual private sale still generates 5.5% use tax. The channel changes who writes the check, not whether 5.5% exists.
A watercraft traded toward another watercraft reduces the base. Tax the difference. MRS IB24 covers attachments and outboards; a trade of an attachment alone has nuances in that bulletin. This page subtracts only a watercraft-for-watercraft allowance the way the Business Guide describes. It does not subtract a car trade from a boat invoice, and it does not assign a dollar for an outboard-only swap.
Example 1: $50,000 boat minus $10,000 watercraft trade
Scenario: Resident dealer. Like-kind watercraft trade.
$2,200 is the official trade illustration. The trade has to be watercraft for watercraft, not a vague “I traded my truck.”
Example 2: Casual $20,000 versus dealer $20,000
Scenario: Same price, two channels. Maine resident. No trade.
The tax dollars match. The paperwork does not. Private buyers still remit 5.5%.
- MRS Business Guide — watercraft trade-in; casual use tax
- MRS IB24 — watercraft trade; attachments/outboards; ST-A-113
No local sales tax — municipal excise instead
Maine does not add city or county sales tax on top of 5.5%. Portland and a small inland town use the same 5.5% state rate. What changes by town is the municipal watercraft excise in 36 M.R.S. §1504 — collected by the town and treated as a prerequisite to the number certificate. That excise is annual. It is not “local sales tax.”
This page quotes one official length-tax component from 36 M.R.S. §1504: under 13 feet / canoes, $6. The rest of the §1504 schedule lives in the statute and at the town office. Do not guess a 16-foot or 25-foot excise dollar here. Pay the town what §1504 and the town clerk list, then take that proof toward IFW.
| Charge | Maine treatment |
|---|---|
| State sales / use tax | 5.5% of taxable watercraft price |
| Local sales tax | None |
| Municipal watercraft excise | Annual, 36 M.R.S. §1504, collected by the town |
| Canoe / under 13′ length component | $6 (statute table) |
Example 1: $50,000 resident purchase — sales tax versus excise
Scenario: You must budget both. Only one is 5.5%.
Do not add a 1% “town sales tax” to the $2,750. Do not skip the excise because sales tax is already large.
Example 2: Short canoe excise component
Scenario: Canoe under 13 feet. You still may owe 5.5% if it was a taxable sale, plus the statute’s $6 length-tax component of excise.
The $6 is an official §1504 length piece, not the whole bill for every canoe in every town if other statute lines also apply. Ask the town clerk to run the full §1504 table for that hull.
- 36 M.R.S. §1504 — municipal watercraft excise schedule
- MRS Business Guide — no local sales tax; 5.5% state
- IFW Boating — excise to the town before the number
IFW registration and town excise
Maine Inland Fisheries and Wildlife numbers motorboats. Inland fees, including a $1 agent fee, sit in a $41–$60 horsepower band. A 40-horsepower inland example is about $46. An inland PWC is $60. Tidal waters use a lower IFW table; this page does not quote a tidal dollar because IFW publishes that table as lower than inland without a second frozen figure in the materials used here. Confirm tidal with IFW. New registration requires proof of sales tax. Municipal excise is a prerequisite to the number certificate.
USCG documented vessels are still subject to sales or use tax unless an exemption applies. Registration and excise still follow IFW and the town. Documentation is not a 5.5% holiday and not an excise holiday unless those offices say so on that file.
Example 1: Inland 40-horsepower registration
Scenario: Inland waters. About 40 HP. Agent fee included in the IFW example.
The $46 is the official inland 40 HP illustration, including the $1 agent fee. It is not sales tax.
Example 2: Inland PWC
Scenario: Personal watercraft, inland numbering.
$60 is the inland PWC numbering line. A PWC bought for $20,000 still sees 5.5% × $20,000 = $1,100 of sales or use tax on a taxable resident purchase — that $1,100 is not in the $60 sticker.
- Maine IFW Boating — inland/tidal fee tables; proof of sales tax; town excise first
- 36 M.R.S. §1504 — excise as the town prerequisite
Nonresidents, gifts, documented vessels
Nonresident Path A, B, and C are above. Commercial fishing machinery and equipment themes in 36 M.R.S. §2013 need documentation with Maine Revenue Services. This page does not auto-zero a lobster boat. Gift, inheritance, and military boat-tax wipes are not confirmed in the Maine boat sources used here. Ask MRS. Do not budget $0 because a parent signed a hull over.
A documented vessel still faces 5.5% unless an exemption in §1760 or another MRS provision applies. Then IFW and the town handle numbering and excise. Bring the federal document plus tax proof.
Example 1: Nonresident Path B — bought outside Maine, short visit
Scenario: Boat purchased and registered outside Maine. Present in Maine 20 days in the first 12 months, not counting temporary storage.
Count days in Maine carefully. Storage carve-outs are in the statute. Do not treat a summer of weekends as “under 30 days” without adding them up.
Example 2: Gift file
Scenario: Family transfer, no purchase price on a bill of sale.
A gift is not Path A. Path A is a sale that leaves Maine in 30 days. Take the gift to MRS and the town, not to a nonresident affidavit, unless they tell you that is the form.
- 36 M.R.S. §1760(25) — Paths A, B, and C
- 36 M.R.S. §2013 — commercial fishing documentation with MRS
- Maine IFW / town — documented vessel numbering and excise
How to calculate Maine boat tax
- Start with sale price. Subtract a watercraft trade-in if the deal is watercraft for watercraft.
- If you are a Maine resident (or otherwise not in §1760(25)), multiply by 5.5%.
- If you are a nonresident who removes the boat within 30 days with ST-A-113, sales tax is $0 on that Path A sale in Maine.
- If you are a nonresident present more than 30 days in the first 12 months, tax 5.5% of 40% of the base.
- Add town excise from §1504 (canoe / under 13′ length piece $6; other lengths at the town).
- Add IFW inland $41–$60 by HP, about $46 at 40 HP, or $60 for an inland PWC. Confirm tidal with IFW.
Walkthrough 1: Resident $50,000 dealer, $10,000 watercraft trade, inland 40 HP
Scenario: Maine resident. Like-kind trade. Inland numbering.
$2,200 matches the official trade example. The $46 is the inland 40 HP numbering illustration.
Walkthrough 2: Nonresident $50,000, 45 days in Maine
Scenario: Path C. No trade.
5.5% × 40% × $50,000 = $1,100. That is the statute’s 60% exemption turned into tax on the remaining 40%.
- MRS Business Guide — 5.5%; trade-in
- 36 M.R.S. §1760(25)(C) — exemption only as to 60% of sale price
- IFW Boating — inland HP table; PWC $60
What this page does not estimate
Full §1504 excise dollars by every length and horsepower break are not copied here beyond the $6 canoe / under-13-feet length component. Ask the town. Full IFW horsepower rows are not listed beyond the $41–$60 inland band, the about-$46 40 HP inland example, the $60 inland PWC, and the note that tidal is lower. Gift, inheritance, and military zeros are not assigned. Commercial fishing exemptions need MRS documentation. Lien fees are not listed. Dealer documentation fees are not listed unless a statute caps them — none is cited in the Maine sources used here. Financing APR is not estimated.
Example 1: Asking the town for excise on a 18-foot boat
Scenario: You know the $2,750 sales tax. You still need §1504.
Pay 5.5% to MRS / the dealer. Pay the town what the statute table says for that length and HP.
Example 2: Tidal numbering
Scenario: You will keep the boat on tidal water. IFW’s tidal table is lower than inland.
Do not copy the inland $46 onto a tidal file. Ask IFW for the tidal line.
Two complete buying examples
Complete example 1: Maine resident, $50,000 dealer boat, no trade, inland 40 HP
Scenario: Dealer collects tax. Town excise, then IFW. Not documented. Not a gift.
This is the primary resident file. 5.5% is the tax. Excise and IFW are the companion bills.
Complete example 2: Nonresident $50,000 — day 20 versus day 45
Scenario: Same price. Two calendars.
The calendar is the tax switch. 20 days can be $0. 45 days is $1,100 on this $50,000 boat. Do not mix those two files.
FAQ
Is Maine boat tax 5.5% plus local sales tax?
5.5% is correct. Local sales tax is not. Municipal watercraft excise is the town bill, under §1504, separate from sales tax.
Are private boat sales tax-free?
No. Casual purchases of watercraft take 5.5% use tax. $20,000 is $1,100.
Does a trade-in reduce Maine boat tax?
Yes when watercraft is traded toward watercraft. $50,000 minus $10,000 is $2,200 of tax. Follow IB24 for attachments and outboards.
I am not a Maine resident. Is tax always $0?
Only if the 30-day rules in §1760(25) are met. More than 30 days in the first 12 months means tax on 40% of the price. On $50,000 that is $1,100, not $0.
What does IFW registration cost?
Inland, including the $1 agent fee: $41–$60 by horsepower; about $46 at 40 HP; $60 for a PWC. Tidal is lower — confirm with IFW. New registration needs proof of sales tax.
Does Coast Guard documentation skip 5.5%?
No, unless a listed exemption applies. Sales or use tax still belongs on the file. Then IFW and the town.
Can I skip town excise if I already paid 5.5%?
No. Excise is a separate annual town tax and a prerequisite to the number certificate.
FAQ example 1: Treating a 45-day stay as tax-free
Scenario: Nonresident $50,000 boat. 45 days in Maine.
Thirty days is the full-exemption line. Forty-five days is the 40% taxable line.
FAQ example 2: Adding a fake local sales tax on $50,000
Scenario: Someone adds 1% “town tax” to 5.5%.
Pay 5.5%. Pay the town’s excise table. Do not add a local sales-tax percent Maine does not charge.
Before you sign
On a resident dealer purchase, 5.5% of the price after a watercraft trade is the sales-tax line — $2,750 on $50,000, $2,200 after a $10,000 watercraft trade. On a private purchase, budget the same 5.5% as use tax. On a nonresident purchase, read the calendar: 30 days with ST-A-113 can be $0; more than 30 days in year one taxes 40% of the price. Pay municipal excise at the town. Then register with IFW with sales-tax proof. Inland numbering is $41–$60 by horsepower, about $46 at 40 HP, $60 for a PWC. Ask IFW for tidal. Ask the town for the rest of §1504 beyond the $6 canoe / under-13-feet length piece. Ask MRS about gifts and commercial fishing. If you finance the boat, the lender may want the tax and numbering receipts before funding; that is a lender rule, not a second Maine sales-tax rate. The dollars this page commits to are 5.5%, $2,750, $2,200, $1,100 casual, $1,100 Path C on $50,000, $0 Path A, about $46 inland 40 HP, $60 inland PWC, and $6 of canoe length excise.
Complete reference list
- Maine Revenue Services Business Guide (December 2025) — 5.5%; trade-in; watercraft nonresident rules
- 36 M.R.S. §1760 — watercraft nonresident exemptions, including the 60% rule
- MRS Instructional Bulletin 24 — Vehicle Dealers — watercraft trade; ST-A-113
- Maine IFW Boating — registration fees; proof of sales tax; excise to the town
- 36 M.R.S. §1504 — municipal watercraft excise schedule
This page estimates Maine boat sales and use tax from official Maine Revenue Services and IFW rules. Maine Revenue Services, Inland Fisheries and Wildlife, and the town that collects watercraft excise set the amount you pay.