Wisconsin LLC Operating Agreement: What ch. 183 Requires and What to Include

A Wisconsin LLC does not need an operating agreement to exist. You file Articles of Organization with the Department of Financial Institutions (DFI), pay the $130 filing fee, and the LLC is formed. The agreement you write, or fail to write, decides how the company actually runs when owners disagree, when a member wants out, or when a bank asks who can sign checks. This guide explains what ch. 183 says about the Wisconsin operating agreement, what the default rules fill in when you say nothing, and what the agreement should cover.

This is informational content, not legal or tax advice. Ch. 183 has specific wording that matters, so have an attorney or CPA who knows your facts review any agreement before you rely on it.

Is a Wisconsin operating agreement required?

No. Wisconsin does not require an operating agreement to be filed with DFI, and ch. 183 does not require one to form an LLC. The formation document is the Articles of Organization (Form 502) under sec. 183.0201, Wis. Stats. DFI reviews only that document at formation, and the agreement stays in your company records.

Not being required does not make the agreement optional in practice. Ch. 183 fills every gap with a default rule written for a generic company, not for yours. If you skip the agreement, the statute decides questions such as how profits are split, who can bind the company, and how a member can leave. Those answers may not match what the owners intended.

What ch. 183 changed in 2023

Wisconsin's current LLC law is the Wisconsin Uniform Limited Liability Company Law, created by 2021 Act 258 and effective January 1, 2023. It is based on the Revised Uniform Limited Liability Company Act, so many of its rules will look familiar if you have read another state's LLC statute. Two points matter most for an operating agreement:

• An operating agreement can be written, oral, implied, or a combination. A court may find that an agreement exists even if nobody wrote it down. Put it in writing anyway. Proving the terms of an oral or implied deal after a dispute is slow and uncertain.
• Written terms generally control over default rules. Where your agreement addresses a topic, its terms generally govern, but only within the limits covered below.

Ch. 183 does not contain series LLC provisions. If you were hoping for a parent LLC with separately protected series beneath it, Wisconsin's statute does not provide that structure. Ask an attorney how separate subsidiary LLCs would work for your situation.

Member-managed or manager-managed

The first structural choice in your agreement is who runs the company day to day.

• Member-managed. Members take part in management. Under s. 183.0301, a member is not an agent of the company solely by being a member, so the agreement should say who can sign for the company. This suits owner-operators who all work in the business. The risk is that any member may sign a contract the others did not expect.
• Manager-managed. Members elect one or more managers, who may or may not be members, and the managers handle operations. Members keep ownership and vote on major decisions. This suits passive investors or companies where one or two people do the work.

Whichever structure you choose, state it clearly. The agreement should also say which decisions need a vote, what vote threshold applies, and whether a single member can act alone on routine matters. Silence on these points sends you back to the statutory defaults.

Single-member LLCs

A single-member LLC often skips the agreement because there is no one to negotiate with. That is a mistake for two reasons. First, the agreement is evidence of separateness. When a court is asked to disregard the LLC and hold the owner personally liable, it looks at whether the owner treated the company as a distinct entity with its own bank account, records, and written governance. An agreement that describes the LLC as a separate legal person and explains how it is run supports that position. Second, many banks ask for an operating agreement when opening a business account or applying for credit, so having one ready avoids delays.

A single-member agreement can be short. Cover the company's purpose, the owner's capital contributions, how distributions are made, who manages the company, what happens to the membership interest on the owner's death or incapacity, and how the company will be dissolved. The agreement describes separateness, but your conduct proves it. Keep company money separate from personal money.

Fiduciary duties: the defaults and their limits

Under the default rules, members of a member-managed LLC, and managers of a manager-managed LLC, owe fiduciary duties to the company and its members. The core duties are loyalty and care. The duty of loyalty covers accounting for company property and profits, avoiding self-dealing, and not competing with the company. Under s. 183.0409 (3), the duty of care is to refrain from the conduct the statute will not excuse: a willful failure to deal fairly with the company or its members on a matter where the person has a material conflict of interest, a violation of criminal law, a transaction producing an improper personal profit, and willful misconduct. A duty of good faith and fair dealing also applies.

The agreement can shape these duties, within limits. Wisconsin departs from the uniform model here. Under s. 183.0105 (4), a written operating agreement may alter or eliminate aspects of the duty of loyalty, identify specific types of activities that do not violate it, and alter the duty of care. It cannot relieve anyone of liability for the conduct listed in s. 183.0105 (3) (g), and it cannot eliminate the contractual obligation of good faith and fair dealing, although it may set standards for measuring it that are not manifestly unreasonable. Have an attorney confirm the exact limits in the current text of ch. 183 before you draft around them.

The clauses to include

1. Company name, principal office, and registered agent. The registered office must be a physical Wisconsin street address, and the agent's email address is required on the formation document and every annual report.
2. Purpose and duration.
3. Members, their names and addresses, and each member's percentage interest.
4. Capital contributions: what each member contributed, its agreed value, and what happens if the company needs more money.
5. Profit and loss allocations, distributions, and the conditions under which distributions may be made.
6. Tax classification: how the LLC is treated for federal and Wisconsin tax purposes, and a commitment to file consistently. Wisconsin imposes no separate LLC franchise or privilege tax. Profits generally flow through to the owners' individual income tax at graduated rates of 3.50% to 7.65%, unless the LLC elects corporate treatment. Confirm the treatment with a CPA.
7. Management structure, voting thresholds, and the authority of each member or manager.
8. Admission of new members and transfer restrictions, including any right of first refusal.
9. Buyout and withdrawal terms: what happens when a member dies, becomes disabled, divorces, files for bankruptcy, or wants out.
10. Dispute resolution, including how deadlocks are broken.
11. Books, records, bank accounts, and member access to company information.
12. Indemnification and insurance for members and managers.
13. Dissolution and winding up.
14. Amendment procedure, signatures, and dates.

Common gaps and what to write

The following table lists decisions that cause the most disputes when the agreement is silent.

Decision	Common gap when left unwritten	What to write
Who can sign contracts	Any member may assume authority the others expected to approve	Named managers or signing thresholds
Additional cash needs	No rule for what happens when the company needs more money	Whether members must contribute, and the consequence of not contributing
Departing member	No price, timeline, or payment terms for a buyout	Valuation method, payment schedule, and triggering events
Deadlock	A 50/50 split has no tiebreaker	Mediation, a tiebreak process, or a buy-sell mechanism
Death or incapacity	An heir may receive ownership without any role in management	Transfer rules, a buyout option, and who acts for the member

If your LLC was formed before 2023

LLCs formed before 2023 may still be governed by the older version of ch. 183 if they filed a statement of nonapplicability. If that describes your company, check the agreement against the older rules, not the current ones. Confirm which version applies with an attorney before you amend the agreement or rely on it in a dispute.

How to adopt the agreement

1. Draft the agreement using the clauses above, or start from an attorney's template.
2. Have every member sign and date it. Keep the signed original with your company records.
3. Update it whenever membership, ownership, management, or tax treatment changes.
4. Give a copy to your bank, accountant, and any lender that asks for one.

DFI does not file the operating agreement, so there is no DFI filing fee for the agreement itself. The costs that do apply are the ones for the entity: the $130 filing fee for Articles of Organization and the $25 annual report (Form 5), which is due each year during the calendar quarter containing the anniversary of organization. A paper annual report adds a $15 surcharge, bringing it to $40. Confirm current fees on the DFI pages before you file.

If you will sell taxable products or services, you also need a seller's permit from the Department of Revenue. The permit costs $20 for an initial two-year period and $10 to renew each subsequent two years.

When to hire a professional

Get an attorney involved if you have more than one member with unequal contributions, outside investors, a family business, a planned sale, a pre-2023 LLC, or employees. Have a CPA confirm the tax classification language before anyone signs.

Official resources

• DFI general information on business entities
• DFI online filing for entity formation and annual reports
• DFI business entity search
• Wisconsin Department of Revenue, new business registration

Disclaimer

This article is informational only. It is not legal, tax, or financial advice, and it does not create an attorney-client or accountant-client relationship. Wisconsin law changes, and the current text of ch. 183 controls. Consult a qualified Wisconsin attorney and a CPA before you draft, sign, or rely on an operating agreement.