Why an Illinois Operating Agreement Matters
The Illinois Limited Liability Company Act sits at 805 ILCS 180, and section 15-5 is the doorway. It lets the members adopt an operating agreement to regulate the affairs of the company and the conduct of its business and to govern relations among the members, managers and company. It does not require one. An Illinois LLC with no agreement is not lawless; it is running on the version the General Assembly wrote.
The Secretary of State registers the company, keeps the articles of organization and takes the annual report. It has no interest in the operating agreement, publishes no form for it and charges no fee for it. That is worth stating plainly because the question comes up on every formation: there is nothing to file and nothing to pay.
Illinois is also one of the more interesting states to draft in, for three reasons that have nothing to do with each other. It permits series inside a single LLC. It repealed its statutory buyout in 2017. And it will enforce a waiver of fiduciary duty only when the waiver is clear and unambiguous.
The Illinois defaults that decide arguments
Section 15-1 makes the company member managed unless the operating agreement expressly says otherwise, and lets a majority of the members decide any matter relating to the business. Section 25-1 requires that any distribution made before dissolution and winding up be in equal shares, which ignores the capital accounts entirely. Section 35-55 provides that a dissociated member loses the right to participate in management and is treated the same as a transferee, holding the distributional interest solely in that capacity. And section 30-20 gives a personal creditor a charging order as the exclusive remedy, with foreclosure available.
The single-member case in Illinois
Section 10-10(c) says the failure of an LLC to observe the usual company formalities or requirements relating to the exercise of its powers or the management of its business is not a ground for imposing personal liability on the members or managers. Illinois has therefore already answered the argument most sole owners are told to worry about.
The agreement earns its keep in other rooms. A Chicago bank opening a business account asks for a document identifying the authorized signer. An SBA lender wants the same. A buyer running diligence treats the absence of one as an unpriced risk. And where the owner has commingled funds, the agreement is the record that shows the company was meant to be separate. Background is in the single-member LLC guide and the Illinois single-member LLC page.
What 805 ILCS 180 Supplies When the Agreement Is Silent
| Question | Illinois answer with no agreement | Section |
|---|---|---|
| Who manages | The members, by majority | 180/15-1 |
| Distributions | Equal shares | 180/25-1 |
| A member leaves | Treated as a transferee, no payment | 180/35-55 |
| Personal creditor | Charging order, exclusive, foreclosable | 180/30-20 |
| Fiduciary waiver | Effective only if clear and unambiguous | 180/15-5(c) |
| Series | Available, with filings and segregated records | 180/37-40 |
Equal shares is the whole rule
Section 25-1 is one sentence long and it is unforgiving: any distributions made by a limited liability company before its dissolution and winding up must be in equal shares. Two members who funded $400,000 and $25,000 respectively take the same check. Nothing in the articles of organization changes that. Only the operating agreement can.
The buyout Illinois deleted in 2017
Illinois used to oblige a company to purchase a dissociated member's distributional interest. Public Act 99-637 repealed section 35-60 with effect from July 1, 2017, and nothing replaced it. Today a member who resigns or is expelled simply becomes a transferee under section 35-55: no vote, no information rights, no payment, and no obligation on anyone to buy them out. Older templates and older advice still assume the buyout exists. It does not.
The statement of authority and why it outranks the articles
Under section 13-15 an Illinois LLC may file a statement of authority with the Secretary of State describing who may execute instruments transferring real property or otherwise bind the company. A certified copy recorded in the county land records is conclusive in favor of a person who is not a member and relies on it. Where the articles of organization conflict with a filed statement of authority, the statement controls as to non-members. Companies holding Illinois real estate should keep the agreement, the statement and the articles saying the same thing.
What Belongs in an Illinois Operating Agreement
Illinois operating agreement at a glance
| Item | Position in Illinois |
|---|---|
| Required by state law | No |
| Format | No writing requirement, but fiduciary waivers must be clear and unambiguous |
| Filed with the Secretary of State | No, and no fee, because there is no filing |
| Governing act | Illinois Limited Liability Company Act, 805 ILCS 180 |
| File.Business drafting | $99 flat |
Ten clauses do most of the work in an Illinois company.
1. Members and percentage interests
Name each member and set percentages totalling 100. Because section 25-1 ignores percentages, the agreement must also say what they control.
2. Contributions and capital calls
Record cash, property and services with agreed values, then state whether further contributions can be required and the consequence of refusing.
3. Management and signing authority
Section 15-1 defaults to member management. If managers run the company, say so expressly and consider a matching statement of authority.
4. Voting thresholds by decision type
Set what a majority may do and what needs a supermajority or unanimity: admitting members, borrowing, selling the business, amending the agreement.
5. Allocations and distribution timing
Displace equal shares with the real split, add a reserve and include a tax distribution sized to the members pass-through liability.
6. Transfer restrictions and foreclosure planning
Because an Illinois charging order can be foreclosed, add a company option to redeem an interest that reaches a third party at a sale.
7. Admission, exit and the price nobody sets
With section 35-60 repealed, the agreement is the only source of a buyout. Fix the valuation method, the notice period and the payment terms.
8. Dissolution triggers and the payment waterfall
State what dissolves the company and who winds it up. Illinois dissolution covers the filing side of the same event.
9. Tax classification and control of it
Record the current federal classification and who may change it. The IRS rules for LLCs follow the election, not the state file.
10. Deadlock, disputes and amendment
Two equal members with no tie-breaker is the standard Illinois deadlock. Add a buy-sell trigger, a venue and the vote needed to amend.
Form your LLC
If you would rather not do this yourself, we prepare the articles, check name availability with the state, and file it for you. Or keep reading and file it on your own. This guide covers everything you need either way.
Series LLCs and What the Agreement Has to Do
Illinois is one of a small group of states that lets a single LLC hold internally separated pools of assets. Section 37-40 permits an operating agreement to establish, or provide for the establishment of, one or more designated series of members, managers, interests or assets. The attraction is obvious for property portfolios and equipment fleets: one entity, one annual report, several liability walls.
The walls only stand if four things are true at once. The operating agreement must establish the series and provide for the limitation on liability. The articles of organization must contain notice of the limitation on liabilities of a series. Separate and distinct records must be maintained for each series, with the assets of that series held and accounted for separately from the company's other assets and from every other series. And a certificate of designation must be filed with the Secretary of State for each series that is to have limited liability. Satisfy all four and the debts of a series are enforceable against that series alone. Miss the record-keeping and the wall is decorative.
In practice the record-keeping is where series structures fail: one bank account, one insurance policy, one lease signed in the parent name. If you cannot say which series owns an asset without reconstructing it from memory, the segregation requirement in section 37-40 has not been met. Companies adding series after formation also need an amendment to the articles of organization to carry the notice.
Charging Orders, Foreclosure and What a Creditor Gets
Section 30-20 lets a judgment creditor of a member obtain a charging order against the distributional interest, which constitutes a lien on it, and subsection (g) states that this section provides the exclusive remedy by which a judgment creditor may satisfy the judgment from that interest. Exclusivity is real protection. Illinois then allows the court to foreclose the lien and order the interest sold at any time, and the purchaser at the sale acquires the distributional interest without becoming a member.
Whether one member changes the answer
Section 30-20 does not distinguish by member count, so its exclusive-remedy language reads the same for a company with one owner. The practical difference is what a purchaser ends up holding. In a multi-member Illinois company the buyer takes economics and no governance, which is why the remedy is unattractive. Where there is a single member, the economics are effectively the whole business, so the deterrent largely disappears. Structure accordingly, and keep the entity current, which a certificate of good standing evidences.
Fiduciary Duties and the Clear and Unambiguous Test
Section 15-3 sets the baseline duties. Loyalty requires a member of a member-managed company to account to the company for any property, profit or benefit derived from the conduct or winding up of its business, to refrain from dealing with the company as an adverse party and to refrain from competing before dissolution. The duty of care is to refrain from grossly negligent or reckless conduct, intentional misconduct or a knowing violation of law. An implied contractual covenant of good faith and fair dealing applies to the agreement and to the members.
Section 15-5(c) then governs how far drafting can go, and Illinois is unusually explicit about it. The agreement may not restrict or eliminate a fiduciary duty owed at common law or under the Act unless the restriction or elimination is clear and unambiguous. It may not alter the duty of care to authorize intentional misconduct or a knowing violation of law. It may identify specific categories of activity that do not violate a fiduciary duty and set the standards by which performance is measured. And under section 15-5(d) it may specify how a transaction that would otherwise breach the duty of loyalty is authorized or ratified after full disclosure. A vague carve-out is worse than none, because it invites the argument and loses it.
Three Illinois Companies and the Section That Found Them
Example one: a series that was not really separate
Ravenswood Property Series LLC in Chicago held six rental buildings, one per designated series, with certificates of designation properly filed. Rents from all six ran through one operating account and the insurance was written in the parent name. When a tenant obtained a $340,000 judgment against Series C, the plaintiff argued the assets had never been held and accounted for separately as section 37-40 requires. The company settled at $215,000 rather than test the point. Separate accounts would have cost roughly $300 a year in bank charges.
Example two: the resignation that cost nothing and solved nothing
Two members founded a Naperville marketing agency with no written agreement. In 2024 one resigned expecting to be bought out, having read a template that cited section 35-60. That section had been repealed in 2017. Under section 35-55 she became a transferee: no vote, no records access, and no payment. She also kept an equal share of every distribution under section 25-1, so the remaining member is funding a former partner indefinitely. Neither outcome is what either of them wanted.
Example three: a waiver that was not clear enough
Rock River Equipment LLC near Rockford had an operating agreement saying members "may pursue other business opportunities." One member bought a competing dealership. The others sued for breach of the duty of loyalty under section 15-3. Because section 15-5(c)(1) only honours a restriction that is clear and unambiguous, the general sentence did not carry the weight the member needed. The dispute ran eighteen months and consumed more than $90,000 in fees before settling, over language that could have named competing dealerships explicitly.
Five Mistakes Illinois LLCs Keep Repeating
Mistake 1: using a template that still cites section 35-60
The statutory buyout has been gone since July 1, 2017. A template that assumes it exists leaves the exit unpriced and the parties surprised.
Mistake 2: a sole owner treating it as paperwork
Section 10-10(c) already handles formalities. The document is for the bank, the lender and the buyer, all of whom ask for it by name.
Mistake 3: never updating it
Percentages shift, members leave, series are added, a tax election is filed. A stale agreement contradicts the state record at the worst possible moment.
Mistake 4: trying to file it with the Secretary of State
Illinois has no form for it and no fee. What is filed is the articles of organization, any certificate of designation for a series and, optionally, a statement of authority.
Mistake 5: writing a fiduciary carve-out in general terms
Section 15-5(c)(1) enforces only clear and unambiguous restrictions. Name the activities, name the disclosure required, name who approves. Keep the registered agent record current as well, and process agent changes promptly.
What Happens When Illinois Law Fills the Gaps
Illinois imposes no penalty for having no operating agreement. Nothing is charged and nothing is revoked. The cost is entirely in the disputes the defaults create, and the figures above are typical rather than extreme.
The Ravenswood settlement was $215,000 for a record-keeping failure. The Rockford duty fight ran past $90,000 in fees over one ambiguous sentence. The Naperville agency now pays half of every distribution to a member who resigned, indefinitely, because section 25-1 keeps the shares equal and section 35-55 offers no way out.
Where these end in court, the numbers harden. A petition for judicial dissolution or an oppression claim in an Illinois circuit court is ordinary commercial litigation: contested matters that reach discovery and a valuation contest commonly pass $75,000 per side in fees, and each side usually needs its own business appraisal, which for a small operating company generally runs $10,000 to $25,000.
The transactional costs are smaller and more certain. Banks decline accounts without a signer document. Lenders discount. Buyers hold back part of the price. And companies distracted by an internal fight miss state deadlines and pay for reinstatement.
How File.Business Drafts Illinois Operating Agreements
We draft to 805 ILCS 180. The intake covers members and percentages, contributed capital, management structure, voting thresholds, the buyout terms that replace the repealed section 35-60, transfer controls, any series structure with its matching articles language and certificates of designation, and the federal tax election. Fiduciary carve-outs, if you want them, are written to the clear and unambiguous standard rather than left to inference. Companies operating outside Illinois get the agreement aligned with their foreign qualification, and trading names go through assumed name registration.
Templates against drafted agreements
A template is fine for a one-member consultancy. It fails an Illinois company with two members, a series structure, real property or an eventual sale, because the provisions Illinois most needs are the ones a national form does not contain. General principles are in operating agreement essentials.
Illinois Operating Agreement FAQ
Is an operating agreement required for an Illinois LLC?
No. Section 15-5 of the Illinois Limited Liability Company Act authorises one and describes its limits, but no provision requires an LLC to adopt one. Banks, lenders and buyers are where the real pressure comes from.
Do I file the operating agreement with the Illinois Secretary of State?
No. There is no Illinois form for it and no fee, because it is an internal contract rather than a public record. What is filed is the articles of organization, any certificate of designation for a series, and optionally a statement of authority under section 13-15.
How are profits divided in an Illinois LLC with no agreement?
Equally. Section 25-1 requires that any distribution made before dissolution and winding up be in equal shares, without regard to what each member contributed. Only the operating agreement can change that split.
Does an Illinois member get bought out when they leave?
Not under the statute. The company purchase provision in section 35-60 was repealed by Public Act 99-637 with effect from July 1, 2017. Section 35-55 now treats a dissociated member as a transferee with no management rights and no right to payment.
Can an Illinois operating agreement waive fiduciary duties?
Only on clear terms. Section 15-5(c)(1) allows a restriction or elimination of a fiduciary duty owed at common law or under the Act if it is clear and unambiguous, and section 15-5(c)(3) forbids altering the duty of care to permit intentional misconduct or a knowing violation of law.
What does an Illinois series LLC have to do to keep each series separate?
Four things together under section 37-40: the operating agreement must establish the series and provide for the liability limitation, the articles of organization must give notice of it, separate and distinct records must show each series holding and accounting for its own assets, and a certificate of designation must be filed for each series.
Can File.Business draft an Illinois operating agreement?
Yes, at $99 flat, with a formation or for an existing company. The draft sets voting and distribution terms, adds the buyout Illinois no longer supplies, writes any fiduciary carve-out to the clear and unambiguous standard, and covers series structures where you need them.
Need a custom Illinois Operating Agreement?
File.Business drafts Illinois-specific Operating Agreements at $99 flat: customized for single-member or multi-member structure, ownership percentages, capital contributions, tax election preferences, and management structure. Includes member-signature template and document-vault storage.
Doing this in Illinois specifically: Illinois operating agreement covers the clause list, the 805 ILCS 180 defaults each clause replaces and the series requirements where they apply. None of it is filed with the Secretary of State and no state fee is payable.
This guide is written from the official sources below. Fees, forms, and deadlines change; confirm the current requirement with the agency before you file.
Disclosure. File.Business is a private filing service, not a government agency and not a law firm. We prepare and submit filings at your direction, and nothing on this page is legal or tax advice. Filing fees, deadlines, and statutory references are current as of the last-updated date shown above and can change. Confirm current requirements with the relevant state agency before you file.
