All Wisconsin business entity information, including entity name, type, Entity ID, and formation date, is available through the Wisconsin DFI's Corporate Records Search. The database is free to search; the department charges fees only for copies and certificates, not for search queries.

Wisconsin labels these fields differently from most states. Your entity number is an "Entity ID," and your formation date appears as the "Registered Effective Date," so knowing the state's terminology saves time during onboarding, compliance checks, or business transactions.

Summary table: finding your Wisconsin entity information

Each of the four core data points appears in the Corporate Records Search, and most also appear on your formation documents and annual reports.

How to search for Wisconsin business entities

Navigate to the Corporate Records Search and enter your business name in the search field. The DFI's search help page advises typing the entity name without the ending, such as "LLC" or "Corp." Searches are case insensitive and support partial matches, so searching "badger" will return "Badger Industries LLC" and similar variations. For compound surnames (D', Mc, O', Van, Von), the help page recommends trying the name with and without apostrophes and spaces.

For narrower results, the Advanced Search filters by entity type (22 categories), entity status, registration date range, registered agent name, and current versus historical names, with "exact phrase," "all of the words," and "starts with these words" matching modes.

Click your entity name in the results to view complete details, including your Entity ID, Registered Effective Date, registered agent information for Wisconsin, and filing history.

What you'll see in search results

Results display in a four-column table:

• ID (your Entity ID)

• Entity Name / Type

• Registered Effective Date

• Status / Status Date

Confirmed status values include Organized, Restored to Good Standing, Delinquent, and Administratively Dissolved. The DFI FAQ defines status as an entity's condition relative to statutory law, and states that it is not an assessment of financial condition or stability.

How to find your entity number in Wisconsin

Your Wisconsin entity number, officially your "Entity ID," is a seven-character identifier: one alpha character and six numeric characters, in the format A###### or #A#####, per the DFI's What's New page. For example, S148937 follows this pattern (one letter, six digits).

Where to locate your Wisconsin entity number:

1. Corporate Records Search (fastest method): Located in the ID column of search results and the Vital Statistics panel of the details page. Labeled as "Entity ID" on the details page and "DFI Entity ID#" on the search screen.

2. Annual report forms and state correspondence: Wisconsin's cooperative annual report, Form 16CO-OP, labels the field "Entity ID #." Used to pull up your record when filing annual reports through the DFI's online portals.

Wisconsin entity number format:

• Format: one letter plus six digits (A###### or #A#####)

• Not the same as archive numbers: year/reel/image references such as 1987 057 1714 are "Annual Report Locator" numbers, which the DFI FAQ describes as archive references tied to microfilm records. They appear in the filing history, not in the Entity ID field.

• Label note: "Document Number" does not appear as the business entity identifier in official DFI materials; look for "Entity ID" instead.

How to find your entity type in Wisconsin

Wisconsin registers LLCs under Wis. Stat. Ch. 183, business corporations under Ch. 180, nonstock corporations under Ch. 181, limited partnerships under Ch. 179, LLPs under Ch. 178, and cooperatives under Chs. 185 and 193.

Where to find your Wisconsin entity type:

1. Corporate Records Search (most accessible): Displayed in the Entity Name / Type column of results and as "Entity Type" in the Vital Statistics panel. Example: "Non-Stock Corporation."

2. Formation documents: Wisconsin uses Articles of Incorporation for corporations and Articles of Organization for LLCs, not "Certificates of Formation." The document title states your entity type.

3. Wisconsin annual report requirements: Entity type appears in the entity information section of each report. Changing type requires a statutory conversion filed on Form 1000 with a $150.00 fee, not an amendment; LLC conversions file a "certificate of conversion" under Wis. Stat. § 183.1044(1).

How to find your formation date in Wisconsin

The DFI FAQ defines the "Registered Effective Date" as the date a domestic entity was created or a foreign entity was licensed in Wisconsin, and the date appears in MM/DD/YYYY format throughout the system.

Where your Wisconsin formation date appears:

1. Corporate Records Search (easiest access): Listed as "Registered Effective Date" in both the results table and the Vital Statistics panel. The Chronology panel adds Effective Date, Transaction, Processed Date, and Description columns for every filing.

2. Certificate of Status: Shows the effective date of incorporation, organization, or qualification. Per the DFI's certificate FAQ, the date printed on the certificate itself reflects the date of purchase, not the formation date.

3. Annual report timing: Domestic entities file during the calendar-year quarter in which the registration anniversary falls, so the Registered Effective Date sets your ongoing compliance deadline.

Formation date vs. effective date

Wisconsin allows a delayed effective date of up to 90 days when forming an entity. For LLCs the rule is Wis. Stat. § 183.0207(3), with matching provisions at Ch. 180.0123(2) for corporations, Ch. 178.0114(3) for partnerships, and Ch. 179.0207(3) for limited partnerships. All four provisions allow a document to specify a delayed effective date and time, up to 90 days after the date it is received for filing.

Foreign entities read differently. Their Registered Effective Date reflects the date Wisconsin licensed the entity to transact business here, not the date the entity was originally formed in its home state. That home-state formation date appears in a separate "Foreign Organization Date" field on the details page, so a foreign LLC or corporation typically shows two different dates: the Wisconsin Registered Effective Date and an earlier Foreign Organization Date from its state of origin.

Manage Wisconsin entity compliance with Discern

Once you've pulled your entity name, type, Entity ID, and Registered Effective Date from the Corporate Records Search, Discern's registered agent and annual report services put those details to work. The platform tracks your anniversary-quarter annual report deadline, and most filings complete in seconds once your entity is onboarded.

For teams with entities beyond Wisconsin, Discern handles registered agent services, annual report filings, entity formations, and foreign registrations across 51+ jurisdictions from a single dashboard. Customers with 200+ state registrations spend 5 to 10 minutes annually on compliance.

Book a demo with Discern to see the platform in action.

Frequently asked questions

Is the Wisconsin business entity search free to use?

Yes. The Corporate Records Search itself is free, with no login required. Fees only apply if you order copies or a Certificate of Status; searching for your entity name, type, ID, or formation date costs nothing.

What is the difference between a Wisconsin Entity ID and a FEIN?

They're unrelated numbers from different agencies. The Entity ID is assigned by the Wisconsin DFI when your business first organizes or registers, in the one-letter-plus-six-digit format described above. Your FEIN (federal Employer Identification Number) comes from the IRS and doesn't appear anywhere in the DFI's Corporate Records Search.

Why does Wisconsin use "Registered Effective Date" instead of "formation date"?

It's simply the DFI's official terminology for the same concept: the date your entity was created (for domestic entities) or licensed to transact business in Wisconsin (for foreign entities). Most other states call this a "formation date" or "file date," so it's worth remembering the Wisconsin-specific label when you're pulling records for onboarding or compliance purposes.

Can I look up a dissolved or administratively dissolved entity in the search?

Yes. The Corporate Records Search includes inactive entities alongside active ones, and the Advanced Search lets you filter by status. A dissolved entity's record still shows its Entity ID, entity type, and Registered Effective Date, along with a Status of Dissolved or Administratively Dissolved and the date that status took effect.