Stack of documents with a paperweight on a leather desk pad, Wisconsin Business Name Search: How to Check and Reserve a Name

Wisconsin Business Name Search: Check and Reserve a Name

Last verified: November 10, 2026

This guide is for founders who want a Wisconsin LLC or corporation name that the Department of Financial Institutions (DFI) will accept. Our position: search first, then decide whether a reservation is worth the extra step. If you can file your formation documents within days, the filing is what DFI examines for the name, and a $15 reservation adds a paper step you may not need. If you are weeks away from filing, the reservation holds the name for 120 days. That is our reasoning from the DFI form and statutes below, not a DFI recommendation.

Using a name for a sole proprietorship or an existing LLC's brand name instead? That is a trade name, covered on our Wisconsin DBA and trade name guide.

What You Need Before You Start

  • Your entity type: LLC, business corporation or nonstock corporation. The required wording in the name depends on it (Step 1).
  • Three to five candidate names: each written with its ending (LLC, Inc. and so on), so you can test them as filed.
  • A way to pay: the DFI name reservation form asks for a check payable to the Department of Financial Institutions. DFI also accepts paper documents by email if the fee was paid through its online order system (Step 4).
  • The DFI Corporation Bureau phone number: 608-261-7577, for close calls.

Wisconsin files these entities through DFI, not a Secretary of State office. DFI describes itself as a filing registry and says it cannot certify that a business operates legally, so a clean name search tells you nothing about licenses.

Step-by-Step: Check and Reserve a Wisconsin Business Name

Step 1: Write the Name With the Ending Your Entity Type Requires

The statutes set the wording, and the DFI reservation form repeats it. Here is what each section says.

  • LLC: the name must contain "limited liability company" or "limited company," or "LLC" or "LC" (capitalization and punctuation may vary). "Limited" may be abbreviated "Ltd." and "company" "Co." (Wis. Stat. 183.0112(1)). The abbreviations work inside those phrases: "Superior Design Co." alone does not meet the rule, "Superior Design Limited Co." does.
  • Business corporation or nonstock corporation: the name must contain "corporation," "incorporated," "company" or "limited," or "Corp.," "Inc.," "Co." or "Ltd." (Wis. Stat. 180.0401(1)(a)). The word "corporation" is one choice among several, not a requirement.
  • Service corporation: the name must end in "Chartered," "Limited" or "Service Corporation," or in "Ltd." or "S.C." (DFI Form 1 instructions, citing s. 180.1907).

Both the LLC and corporation sections also bar a name that states or implies a purpose regulated under another Wisconsin statute, unless the entity meets that statute. If your name points at a regulated field, ask the agency that licenses it before you pay for anything.

Step 2: Search CRIS, Then Read the Result Rather Than Just Looking for Your Name

Search the DFI Corporate Registration Information System (CRIS) for each candidate. DFI also says you can call 608-261-7577 and ask an agent to search, but it calls verbal results tentative because the pool of available names changes daily.

What counts is whether your name is distinguishable from the names on DFI's records, not whether it is identical. For an LLC, that comparison covers existing entities that are not administratively dissolved, limited liability partnerships, foreign entities registered in Wisconsin, and names others have reserved or registered (183.0112(2)). The statutes also say entity endings are ignored in the comparison: "LLC," "Inc.," "Corp.," "Ltd." and similar words are not taken into account (183.0112(4); 180.0401(3m)). By our reading, if Lakeside Construction Inc. is on record, Lakeside Construction LLC is not distinguishable from it. So search the name without its ending, and try spelling and spacing variants.

On the entity record, the DFI FAQ's status and transaction codes tell you whether a similar name is really out of reach:

  • RES: a short-term name reservation, a 60 or 120 day term.
  • COM: in process, meaning a name tied to a document DFI has not accepted yet.
  • DNP: dissolved, name protected, so a dissolved entity can still hold its name.
  • ADS or IDS: administratively or involuntarily dissolved. The LLC name statute leaves administratively dissolved entities out of the comparison (183.0112(2)(a)), but DFI makes the call, so ask before you count on a dissolved entity's name.

The DFI site lists a separate Trademark Search beside its Business Entity Search. We did not confirm whether CRIS also shows registered trade names, so run both if the name matters to you.

Important: DFI's FAQ says no name should be assumed available until you have written confirmation that your formation filing or name change has been examined and filed. Treat a clean search as a screen, not an answer.

Step 3: Decide Whether to Reserve the Name or Just File

Reserve if there will be a gap between choosing the name and filing, for example while you wait on a partner, a lawyer or a registered agent arrangement. Skip it if you can file the articles this week: the LLC articles of organization cost $130 online or $170 on paper, and the name is examined on that filing too (DFI fee schedule; 183.0122(2)(a)1). Paying $15 first buys you nothing if the articles go in right away. This is our reasoning, and a lawyer or accountant can tell you whether your timeline differs.

If the name you want is too close to one already on record, the statutes give a route that does not require a new name. DFI must authorize it if the other holder consents in writing and gives an undertaking to change or cancel its own name, or if you deliver a certified court judgment that you may use the name (183.0112(3m); 180.0401(3)). The application for use of an indistinguishable name costs $10 (183.0122(2)(a)2; 180.0122(1m)(b)). We found no form number for it in the sources we read, so ask DFI at 608-261-7577 how to file it.

Step 4: Reserve the Name With DFI Form 1

The application is the DFI Form 1, Name Reservation Application. The term is 120 days, and the statute lets the applicant renew it from time to time (183.0113(1)). The fee is nonrefundable even when DFI finds the name unavailable, which is the main reason to search first.

ItemCostWhere to confirm
Reservation for an LLC, business corporation, cooperative or LLP (120 days)$15DFI Form 1; 183.0122(2)(a)3
Reservation for a limited partnership, LLLP or nonstock corporation (120 days)$10DFI Form 1
Renewal of an LLC reservation$15183.0122(2)(a)4
Business corporation reservation or renewal by telephone$30180.0122(1m)(e) and (f)
Optional expedited service$100 more per transactionDFI Form 1; DFI FAQ

How to file: Form 1 tells you to mail the signed original with a check to DFI. The DFI FAQ also describes emailing documents as PDFs, named with the form number and the entity name, with a receipt from DFI's online order system or a prior credit attached. DFI's File Online page lists articles, amendments, annual reports, dissolutions and similar filings, and we did not find name reservation on that list, so do not plan on an online-only reservation. Confirm the current method with DFI before you mail anything.

Timing: expedited requests are acted on by the close of business the next business day. We found no standard processing time in Form 1 or the FAQ, so ask DFI before you rely on a date. Paper filings get an emailed confirmation if you give a contact email, and otherwise DFI mails the document back.

What a Reservation Does and Does Not Do

What it does: once DFI finds the name available, it reserves it for your exclusive use for the 120-day term (183.0113(1)). Other applicants' names must be distinguishable from reserved names, which is why a reservation blocks look-alike filings (183.0112(2)(d)). You can transfer the reservation to someone else with a signed notice (183.0113(2)); the notice fee is $10.

What it does not do: it does not form your company, authorize you to operate or satisfy any license requirement. It also says nothing about your domain name, your social media handles or other states. A Wisconsin trademark filing is a separate DFI program (see the DFI trademark information page), and federal trademarks are handled by the U.S. Patent and Trademark Office. Whether you need either is a question for a trademark attorney.

Where Name Searches Go Wrong

  • Searching only the exact string. Because endings are ignored, a name that differs from an existing one only by LLC, Inc. or Corp. can be refused.
  • Paying to reserve before searching. The $15 is not refunded if the name fails the naming requirements.
  • Treating a reservation as a filing. It holds the name for 120 days; you still have to file your articles and keep a registered agent at a physical Wisconsin street address, not solely a P.O. box or mailbox service (183.0115(1m)).
  • Letting the term run out. The statute protects the name for the 120-day period and any renewal. After that, nothing in the statute keeps the name yours.
  • Skipping the outside checks. DFI records do not cover domain names or social handles. Check those before you print signs or order a logo.

Next Steps After the Name Is Settled

Frequently Asked Questions

Do I have to form the business within 120 days of reserving the name?

No. The statute describes a reservation for the applicant's exclusive use for 120 days, renewable, and we found no filing deadline or penalty in 183.0113. If the term ends without a renewal or a filing, DFI no longer holds the name for you.

Can I change my business name after I file?

Yes, by filing an amendment. The fee is $40 for an LLC (183.0122(2)(a)10) and $40 for a business corporation (180.0122(1m)(m)). The new name has to meet the same ending and distinguishability rules as a new one, so search it first.

Do I need to reserve a name for a sole proprietorship?

No. DFI says sole proprietorships can register their business name by filing a registration of trade name instead. The DFI trademark page puts the filing fee at $15, with registration expiring after 10 years unless renewed, and says registration is not required. Details are on our trade name guide and the sole proprietorship guide.

What if someone else has reserved the name I want?

DFI must treat a reserved name as unavailable to others. You can choose another name, ask the holder for written consent under the indistinguishable-name route in Step 3, or check back later. Waiting is not a plan, since the holder may renew the reservation.

Is a Wisconsin name reservation the same as a trademark?

No. A reservation holds a name on DFI's entity records for 120 days. A Wisconsin trademark or trade name registration is a different DFI filing, and a federal trademark comes from the U.S. Patent and Trademark Office. They answer different questions, so ask an attorney which one your brand needs.

Disclaimer

This article is general information about Wisconsin business name searches and reservations. It is not legal or tax advice. Naming, entity choice and trademark questions depend on your situation, so talk with a Wisconsin attorney or accountant before you file. DFI business entity general information is the source for current filing requirements and fees.

Sources

Keep exploring: related Wisconsin guides