What does a Wisconsin LLC name have to end with?

One of the state's accepted designators — LLC, L.L.C. and Limited Liability Company. The checker searches the name with and without the suffix, because the suffix alone never makes a name distinguishable.

Can I reserve a business name in Wisconsin before I file?

Yes. The Wisconsin Department of Financial Institutions charges $15 to reserve a name for 120 days. A reserved name shows as taken to everyone else's search.

How much does it cost to register a business name in Wisconsin?

The name itself is free to search. Filing the entity is what costs money: $130 for an LLC and $100 for a corporation, then annual report, $25 (llc) / $25 (corp), due in the quarter of the anniversary.

Are there words I can't use in a Wisconsin business name?

Words that imply a regulated business need consent first. In Wisconsin that includes Bank, Trust, Insurance, Cooperative and Engineer. Names that suggest a government agency are refused outright.

How many new businesses start in Wisconsin each year?

The Census Bureau counted 79,564 business applications in the twelve months to August 2026, +25.8% on the year before. Not every application becomes a registered entity, but each one is a name someone intends to use.

Does a Wisconsin registration protect my name in other states?

No. It protects the name inside Wisconsin's registry only. Nationwide protection comes from a federal trademark, which is why the checker runs the USPTO search alongside the Wisconsin lookup.

Wisconsin Secretary of State business search — LLC name check, trademark & domain lookup

Wisconsin's registry lives at the Department of Financial Institutions, and it's one of the more forgiving states on suffixes: 'Limited Liability Company' must appear, but abbreviations are accepted in the form the filer chooses. The annual report is a flat $25 due in the anniversary quarter, and formation posts online immediately.

Run the Wisconsin check — One search covers the Wisconsin registry, federal trademarks and the domain. Free, no signup.

Check this name →

How to check a business name in Wisconsin

Start with the registry. Search the Wisconsin registry for the exact name; it's the check that decides whether you can file at all.
Then the two checks the state doesn't do. A federal trademark reaches across state lines, and the .com decides whether customers find you — both run here automatically.
Lock it in. Wisconsin will hold it for 120 days for $15. The system of record is the Wisconsin Department of Financial Institutions; confirm there before paying a filing fee.

How busy is Wisconsin right now?

In the year to August 2026, Wisconsin recorded 79,564 new business applications — +25.8% on the year before, the 25th-highest total of any state and 13.3 per 1,000 residents (ranked 41st per person). July was the busiest month with 8,336 applications, and Wisconsin accounts for 1.3% of all U.S. filings.

That volume is the reason exact-name checks age quickly here: the registry changes by the hundreds every business day.

Where America starts businesses — all 50 states ranked →

Source: U.S. Census Bureau, Business Formation Statistics (monthly, not seasonally adjusted). 2019 comparison: 43,789 applications in calendar 2019.

Wisconsin naming rules: what the Wisconsin Department of Financial Institutions will and won't accept

The rule that matters most in Wisconsin is distinguishable upon the records of the Department. The examiner ignores punctuation, spacing, capitalization and the suffix when comparing, so two names that look different on paper can still collide. An LLC name must end in LLC, L.L.C. and Limited Liability Company; a corporation uses Corporation, Corp., Incorporated and Inc., among others.

Some words need permission first. In Wisconsin that list includes Bank, Trust, Insurance, Cooperative, Engineer and Architect — using one implies a regulated activity and the filing will be held until the relevant regulator consents.

The fees are straightforward: forming an LLC costs $130, a corporation $100 and a name reservation is $15 and holds the name for 120 days. Online filings usually immediate.

Keeping it: Annual report, $25 (LLC) / $25 (corp), due in the quarter of the anniversary. Skip it and the state eventually dissolves the entity, releasing the name back into the pool.

Source: the Wisconsin Department of Financial Institutions, (608) 261-7577 — official website (fee schedule). Fees change; confirm before filing.

How Wisconsin decides whether a name is taken

Three things the Wisconsin Department of Financial Institutions looks at, and one it doesn't:

Status. Only entities in an active status hold their names. Dissolved, revoked and withdrawn registrations release the name — with the caveat that a very recent lapse can still be reinstated, which our result notes when it applies.
Distinguishability. Your name must differ from every active Wisconsin name by more than punctuation, spacing, capitalisation or the entity designator. Two names that read the same aloud are usually treated as the same name.
Designator. The recorded name of an LLC ends in an LLC designator and a corporation's in Inc., Corp. or an accepted equivalent; leave it off and the filing is returned.
Not trademarks. The registry never checks the USPTO. A name can be free in Wisconsin and still infringe a federal mark, so run both — the checker on this page does.

Naming rules, fees and reservation windows come from Wisconsin statute and change; treat the Wisconsin Department of Financial Institutions's current guidance as final before you file. This is a practical guide, not legal advice.

About the Wisconsin Department of Financial Institutions

The Wisconsin Department of Financial Institutions maintains Wisconsin's registry of corporations, LLCs, and other registered entities — it is the system of record for Wisconsin business names. Useful official resources:

Official Wisconsin business entity search — the state's own lookup.
Wisconsin Department of Financial Institutions — official website — filings, forms, fees, and contact details.

Confirming the result on the Wisconsin Department of Financial Institutions's site

Treat the checker as the fast filter and the state's own search as the final word. Once a name comes back clear here, open the Wisconsin entity search and type the name the way it will appear on the formation document — designator and all. Read down the list of matches rather than stopping at "no exact match": look at each record's status (only active ones block you) and at how close the spelling is, because Wisconsin rejects near-duplicates as well as duplicates. If the name is still clear, reserve it or file the same day; registrations are first-come, first-served and the registry moves daily.

Frequently asked questions

What does a Wisconsin LLC name have to end with?: One of the state's accepted designators — LLC, L.L.C. and Limited Liability Company. The checker searches the name with and without the suffix, because the suffix alone never makes a name distinguishable.
Can I reserve a business name in Wisconsin before I file?: Yes. The Wisconsin Department of Financial Institutions charges $15 to reserve a name for 120 days. A reserved name shows as taken to everyone else's search.
How much does it cost to register a business name in Wisconsin?: The name itself is free to search. Filing the entity is what costs money: $130 for an LLC and $100 for a corporation, then annual report, $25 (llc) / $25 (corp), due in the quarter of the anniversary.
Are there words I can't use in a Wisconsin business name?: Words that imply a regulated business need consent first. In Wisconsin that includes Bank, Trust, Insurance, Cooperative and Engineer. Names that suggest a government agency are refused outright.
How many new businesses start in Wisconsin each year?: The Census Bureau counted 79,564 business applications in the twelve months to August 2026, +25.8% on the year before. Not every application becomes a registered entity, but each one is a name someone intends to use.
Does a Wisconsin registration protect my name in other states?: No. It protects the name inside Wisconsin's registry only. Nationwide protection comes from a federal trademark, which is why the checker runs the USPTO search alongside the Wisconsin lookup.

Still choosing a name? Try the Wisconsin business name generator — every idea checked against the same registry.

Check other states

Alabama · Alaska · Arizona · Arkansas · California · Colorado · Connecticut · Delaware · District of Columbia · Florida · Georgia · Hawaii · Idaho · Illinois · Indiana · Iowa · Kansas · Kentucky · Louisiana · Maine · Maryland · Massachusetts · Michigan · Minnesota · Mississippi · Missouri · Montana · Nebraska · Nevada · New Hampshire · New Jersey · New Mexico · New York · North Carolina · North Dakota · Ohio · Oklahoma · Oregon · Pennsylvania · Rhode Island · South Carolina · South Dakota · Tennessee · Texas · Utah · Vermont · Virginia · Washington · West Virginia · Wyoming