Wisconsin boat tax follows where the boat is customarily kept, not the dealer’s city. State sales or use tax is 5%. Most counties add 0.5%. If the boat is customarily kept in the City of Milwaukee, add Milwaukee’s 2% city sales and use tax (in effect since January 1, 2024), plus the county portion from the official chart. A $20,000 boat kept in Dane County at 5% plus 0.5% is $1,100. Title is $5. A motorized boat under 16 feet registers at $22. You cannot register with the Department of Natural Resources without proof the tax was paid or that an exemption applies. Wisconsin DOR sets the tax. Wisconsin DNR sets registration.
How much is Wisconsin boat sales tax and registration?
The sales price includes accessories affixed to the boat — anchors, cushions, marine radios, radar, and similar items described in Tax 11.85. A “hull only” quote that leaves those items off the invoice understates the tax if they are affixed. A dealer collects tax and you bring proof to DNR. If tax was not paid, DNR collects 5% plus local when you register, unless you fit an exemption. DNR will not complete registration on a handshake that “tax was handled.” Bring the invoice or the exemption paperwork.
Length for the registration fee is the boat’s length class, not a round number you like. Sixteen feet even is the $32 motorized band, not $22. Forty feet even is $100, not $60. Non-motorized sail at $17 is a different column; an outboard bolted on is motorized even if you still have a mast.
| Deal (motorized, title $5, no exemption) | Tax | Title | Registration | Tax + title + reg |
|---|---|---|---|---|
| $20,000, Dane County 5.5%, under 16 feet | $1,100 | $5 | $22 | $1,127 |
| $20,000, Dane County 5.5%, 18 feet | $1,100 | $5 | $32 | $1,137 |
Example 1: $20,000 boat customarily kept in Dane County
Scenario: Resident purchase. County rate 0.5% as in the usual county add-on used for this Dane example. 18-foot motorized boat. Tax not yet paid. No family exemption.
If a dealer already collected that $1,100, the tax line at DNR is proof-of-paid, not a second 5.5%. Title and registration still apply.
Example 2: Same $20,000 boat customarily kept in Milwaukee
Scenario: The boat lives in the City of Milwaukee. State 5% plus county plus Milwaukee 2% city tax. This page does not freeze a combined Milwaukee total from an unofficial chart — add 2% city on top of state and the county portion from the current DOR/DNR materials.
Skipping Milwaukee’s 2% understates tax by $400 on this $20,000 boat. Using the dealer’s suburb instead of Milwaukee customary keep is the other expensive mistake.
- Wisconsin DNR, Registration fees — length fees; county/city sales-tax note
- Wis. Stat. § 77.52 — 5% state rate
- Tax 11.85 — boats; tax at registration; affixed accessories
5% state plus county — and Milwaukee 2%
Wisconsin’s state rate is 5%. County sales and use tax is added where the boat is customarily kept. Most counties are 0.5%. The City of Milwaukee imposes an additional 2% if the boat is customarily kept in Milwaukee, effective January 1, 2024. Combined rates are not one statewide number. Dane at 5.5% and Milwaukee with the extra 2% city tax are different bills on the same $20,000 hull. A county that does not impose the 0.5% option would be 5% state only — look it up; this page does not list unofficial no-county counties.
Tax 11.85 is the boat rule: vessels and barges, tax at registration, proof required to register. Documented boats that Wisconsin requires to be registered, or boats documented under United States law, still pay tax at Wisconsin registration or title unless they are an exempt occasional sale. Documentation is not a quiet $0. Bringing a boat into Wisconsin from another state is use tax at the combined rate for where you will keep it, minus documented tax already paid elsewhere, not a free pass because it already has numbers from a neighboring state.
Example 3: Dealer in one county, boat kept in another
Scenario: You buy from a dealer in a 5.5% county. You keep the boat in Milwaukee. $20,000 18-foot motorized boat.
If the dealer collected the wrong local, sort it out with DOR before DNR will treat the proof as complete.
Example 4: Affixed accessories in the sales price
Scenario: Hull advertised at $18,000. Radar, cushions, and a marine radio affixed at delivery add $2,000. Kept in Dane County at 5.5%.
Loose, un-affixed gear sitting in a box may be a different retail question. Affixed equipment is in the boat’s sales price under Tax 11.85.
- Tax 11.85 — sales price includes affixed accessories; registration requires proof of tax or exemption
- DNR registration fees page — county/city note; Milwaukee 2%
Dealer, private sale, and trade-in
A retailer collects tax. You need that proof to register. A nonexempt private sale still owes 5% plus local at DNR if it was not previously paid. Treating every garage-sale boat as an exempt occasional sale is the myth to kill. The family path that can be $0 is narrower: Tax 11.33(4)(b) — transfer to listed relatives, boat previously titled or registered in Wisconsin in the transferor’s name, and the transferor is not in the boat business.
Trade-in follows general Wisconsin sales-tax trade-in rules. This page does not use a special boat formula and does not subtract a trade-in from the $20,000 examples. Ask DOR whether your allowance reduces the measure, then put that net on the invoice.
Example 5: Dealer already collected tax
Scenario: Dane County keep. $20,000. Dealer invoice shows 5.5% paid. 18-foot motorized.
Without that invoice, DNR can collect the $1,100 at the counter even if you think the dealer “took care of it.”
Example 6: Private sale, tax not paid
Scenario: Same $20,000 18-foot boat, Dane County keep. Neighbor sale. No family exemption.
Used and private do not mean exempt. Exempt is the Tax 11.33 family occasional-sale test, or another documented DOR exemption.
- DNR fees page — 5% plus local on nonexempt private or dealer sales at registration if not previously paid
- Tax 11.33(4)(b) — family occasional sale conditions
Customary keep, not dealer location
County tax, and Milwaukee’s 2% when it applies, follow the water the boat actually lives on — the customary keep. A lake home in Dane County and a slip in Milwaukee are different local rates on the same invoice price. Look up the combined rate on the official chart. Do not copy a city percentage from memory. This page uses Dane County at 5% + 0.5% because that is the research example for “most counties,” and Milwaukee’s extra 2% city tax because that amount is published. Other counties belong on the DOR lookup.
Example 7: $20,000 Dane vs Milwaukee keep
Scenario: Identical boats, different customary keep. County 0.5% in both illustrations; Milwaukee adds 2%.
Registration dollars do not change with the city. Tax does.
Example 8: $10,000 boat, same two keeps
Scenario: Smaller purchase, still motorized under 16 feet.
Half the price is half the tax at the same combined rate. The Milwaukee 2% is still $200 on $10,000.
- DNR registration fees page — tax based on where the boat is customarily kept
- DOR local rate chart — county and Milwaukee city amounts
Title $5 and DNR length fees
Title is $5. Registration is by length and propulsion:
| Registration class | Fee |
|---|---|
| Motorized, under 16 feet | $22 |
| Motorized, 16 to under 26 feet | $32 |
| Motorized, 26 to under 40 feet | $60 |
| Motorized, 40 feet and over | $100 |
| Non-motorized sail | $17 |
Aquatic invasive species stamps and other DNR items can add more. This page does not print an unofficial stamp dollar. Ask DNR’s current fees page. You still cannot register without tax proof or an exemption. Title $5 is a statewide DNR title amount on that fees page, not a county clerk extra. Lien recording, if DNR charges one, is not in the length table this page uses — ask when you apply rather than adding a guessed lien line.
Registration and tax are two counters in one trip. People budget $32 and forget $1,100. Or they budget 5% and forget Milwaukee. Bring both: the combined-rate math for customary keep, and the length-class fee. If you finance the boat, the lender may want the title in your name before funding; that still does not change the 5% plus local.
Example 9: 30-foot motorized, Dane County, $40,000
Scenario: Tax not paid. No exemption.
The $60 registration is not a substitute for the $2,200 tax.
Example 10: Non-motorized sail, $8,000, Dane County
Scenario: Sail only, no motor. Tax not paid.
Put a motor on it later and the registration class can move to the motorized column. Tax on this purchase is still 5% plus local on the sales price.
- DNR, Registration fees — $22 / $32 / $60 / $100 / $17; title $5
Family transfers, documented boats, and out-of-state tax
A qualifying family occasional sale under Tax 11.33(4)(b) can be $0 sales and use tax: listed relatives, previously titled or registered in Wisconsin in the transferor’s name, transferor not in the boat business. Title and registration fees may still apply. Inheritance uses that same family/heir frame unless a separate statute applies — still budget DNR fees. Military is not a boat exemption on this page; ask DOR. A transfer to a friend, a neighbor, or a relative who is not on the listed-relative list is a regular sale at 5% plus local unless another exemption is documented.
New residents do not get a special Wisconsin boat holiday in the materials this page uses. Credit tax you already paid to another state, with proof, against Wisconsin’s liability for that keep location. If you paid less elsewhere than Wisconsin combined, the remainder is still due. Do not copy another state’s 30-day rule onto Wisconsin.
Tax paid to another state can credit Wisconsin use tax. Document it. Use the rate shown on the proof you bring. Credit cannot exceed what Wisconsin would have charged. Documented vessels still pay at Wisconsin registration or title unless the occasional-sale exemption applies.
Example 11: Qualifying family transfer
Scenario: Parent transfers a Wisconsin-titled boat to a listed relative. Parent is not in the boat business. No money.
All three conditions matter. Relatives alone are not enough.
Example 12: Out-of-state tax credit on $20,000, Dane 5.5%
Scenario: Wisconsin would charge $1,100. You have proof of sales tax paid to another state.
A no-tax state does not create a Wisconsin credit.
- Tax 11.33(4)(b) — family occasional sale
- Tax 11.85 — documented boats; tax at WI registration/title unless exempt occasional sale
How to calculate Wisconsin boat tax
- Find where the boat will be customarily kept. That sets county tax and whether Milwaukee 2% applies.
- Look up the combined rate (5% + county + Milwaukee city if kept in Milwaukee).
- Taxable price is the sales price including affixed accessories. Do not subtract a trade-in on this page unless DOR confirms it.
- If a qualifying Tax 11.33(4)(b) family transfer, tax is $0.
- If a dealer or another state already collected tax, credit or proof-of-paid may zero the Wisconsin tax line — document it.
- Otherwise multiply price by the combined rate.
- Add title $5 and the DNR length/propulsion registration fee. Ask DNR about AIS or other current stamps.
Example 13: Walkthrough — $20,000 Dane County, 18-foot motorized
Scenario: Private, no exemption, tax not paid.
That is the core Wisconsin first-cost picture outside Milwaukee.
Example 14: Walkthrough — $20,000 Milwaukee keep, dealer paid tax
Scenario: Invoice shows state, county, and Milwaukee 2% collected on $20,000.
Match the proof to customary keep, not to the dealer’s county.
- Tax 11.85(3) — cannot register without proof of tax or exemption
- DNR fees; § 77.52
What this page does not estimate
This page does not freeze every county’s combined rate. It does not publish a boat-only trade-in formula, a military exemption dollar, or AIS stamp dollars. It does not treat every private sale as exempt. It does not use dealer location for local tax. It does not skip Milwaukee 2% when the boat is kept in Milwaukee. Lien fees, if any, are not on the DNR length table used here. Trailer tax is a vehicle path. Government and resale certificates need the actual exemption documents — this page does not auto-zero them.
Example 15: AIS and other DNR add-ons
Scenario: You have tax and the $32 registration for an 18-foot motorized boat.
Registration fees, AIS stamps, title fees, and home-rule locals can add more than the 5.5% line.
Example 16: Cousin “gift” that fails Tax 11.33(4)(b)
Scenario: Transfer to someone who is not on the listed-relative list, or the boat was never Wisconsin-titled in the giver’s name.
Do not copy another state’s family list onto Wisconsin.
Two complete buying examples
Example 17: Complete deal — $20,000 18-foot boat, Dane County
Scenario: Private purchase. Customarily kept in Dane County. Motorized. Tax not paid. Not a qualifying family transfer.
If a dealer had already collected $1,100 at 5.5%, DNR would take $37 plus any current stamps, with the invoice attached.
Example 18: Complete deal — Milwaukee keep vs qualifying family gift
Scenario: Same $20,000 18-foot motorized boat. Compare Milwaukee customary keep (tax due) with a qualifying Tax 11.33(4)(b) transfer.
Path A is location. Path B is the exemption statute. Mixing them — claiming a gift because the boat sits in Milwaukee — does not work.
Common questions
What is Wisconsin boat sales tax?
5% state plus county where the boat is customarily kept, plus Milwaukee 2% city tax if it is kept in Milwaukee. Dane at 5.5% on $20,000 is $1,100.
Does the dealer’s city set the local tax?
No. Customary keep does.
Do I pay tax on a private sale?
Yes, 5% plus local at registration if it was not paid and you are not on a qualifying exemption. Not every private sale is an occasional-sale exemption.
What does registration cost?
Motorized: $22 / $32 / $60 / $100 by length. Non-motorized sail: $17. Title: $5. Stamps extra — see DNR.
Can I register without paying tax?
Only with proof the tax was paid or an exemption. Tax 11.85(3) is explicit.
Does a Coast Guard document skip Wisconsin tax?
No. Tax is paid at Wisconsin registration or title unless you are an exempt occasional sale.
When does Milwaukee 2% apply?
When the boat is customarily kept in the City of Milwaukee, from January 1, 2024 forward on that city tax.
Who do I pay?
A dealer may collect tax. Otherwise DNR collects at registration. DOR is the tax agency. DNR is the registration agency.
I am moving to Wisconsin with a boat. Is there a free period?
This page does not publish a special new-resident holiday. Budget use tax at the combined rate for where the boat will be kept, minus documented tax paid to another state.
Is 16 feet the cheap motorized class?
Under 16 feet is $22. Sixteen feet to under 26 feet is $32. Sixteen feet even is not “under 16.”
Before you sign
Write customary keep on your notes before you talk tax. A Milwaukee slip and a Dane driveway are different combined rates. Get an invoice that includes affixed accessories and, if a dealer collected tax, the rate and amount. If you are claiming a family transfer, check all three Tax 11.33(4)(b) conditions — relative list, prior Wisconsin title or registration in the giver’s name, and not a boat business. Budget title $5 and the DNR length fee. Ask DNR what stamps apply this year. You will not leave with a registration until tax is proven or exempted.
If the boat is coming from another state, bring the invoice that shows tax paid. If no tax was paid, plan on Wisconsin’s combined rate. If you finance, the lender’s title request does not change the 5% plus local. Wisconsin DOR and Wisconsin DNR set what you pay.
This page estimates Wisconsin state sales or use tax at 5% plus county tax (and Milwaukee 2% city tax when the boat is customarily kept in Milwaukee), plus DNR title $5 and length-class registration fees. The Department of Revenue and the Department of Natural Resources set the amount you pay.