Illinois LLC Operating Agreement: What the LLC Act Requires and What to Include

An operating agreement is the foundational legal document that governs how your Illinois LLC operates. Unlike your Articles of Organization, which you file with the Secretary of State, your operating agreement stays private and sets the internal rules for your business. It covers everything from how profits are divided to what happens if a member wants to leave. Without one, Illinois law defaults to standard rules that may not reflect what you and your co-members actually want.

What Illinois Law Says About Operating Agreements

Illinois defines an operating agreement in its Limited Liability Company Act, at 805 ILCS 180/1-5. According to this statute, an operating agreement can take several forms: it can be oral, in writing, implied, or any combination of the three. Most importantly, an operating agreement is not filed with the Secretary of State. It remains a private agreement between the members.

Illinois law does not require an operating agreement to exist at all. However, 805 ILCS 180/15-5 makes clear that the operating agreement governs the internal affairs of the LLC. If members do not have a written operating agreement, default rules from the LLC Act apply automatically. For single-member LLCs, this may be fine. For multi-member LLCs, defaulting to statutory rules often creates problems later.

Key point: The default assumption under Illinois law is that an LLC is member-managed unless the operating agreement or Articles of Organization state otherwise. This means all members have equal authority to make decisions and sign contracts on behalf of the LLC, regardless of their capital contribution.

Why You Need an Operating Agreement

Even though Illinois does not require a written operating agreement, a written one is the practical way to document tax and economic arrangements, such as an S corporation election or profit sharing that does not match ownership percentages. Lenders and investors almost always request to review your operating agreement before funding your business.

Without a written operating agreement:

• Distributions before dissolution are made in equal shares among members, regardless of capital contributed.
• All members can bind the LLC to contracts and obligations.
• No clear process for adding or removing members.
• Disputes over decision-making authority become costly litigation.
• If a member dies or becomes disabled, there is no succession plan.
• A member of a member-managed LLC can dissociate at any time by giving notice.

A written operating agreement prevents these problems by establishing clear rules upfront.

Essential Provisions to Include

1. Membership Structure

Define each member's name, address, and percentage ownership (or capital contribution). State whether new members can be admitted and under what conditions. Specify whether membership interests are transferable without consent from other members. This prevents surprises if a co-member tries to sell their stake to an outside party.

2. Capital Contributions and Distributions

Document how much each member is investing in the LLC and what form the contribution takes (cash, property, or services). Specify how profits and losses will be allocated and when distributions will be made. Illinois law does not mandate that distributions match capital contributions or ownership percentages; you can allocate them however the members agree.

3. Management and Voting Rights

State whether the LLC is member-managed (all members have authority to act) or manager-managed (one or more managers make decisions, and members do not). For member-managed LLCs, define what decisions require unanimous approval, which require a majority, and which a single member can make alone. Common unanimous-vote items include adding new members, dissolving the LLC, and amending the operating agreement.

4. Roles and Responsibilities

Define the titles and duties of any officers or managing members. For example, a president might handle day-to-day operations while a treasurer manages finances. This prevents confusion and makes members accountable for their roles.

5. Meetings and Decision-Making

Set a schedule for member meetings (quarterly, annually, or as needed) and define a quorum requirement. Specify whether meetings must be in person or can occur by phone or video. Document how decisions are made when formal meetings are not called. Many small LLCs agree to make routine decisions by email with written consent.

6. Compensation and Loans

If any member will receive a salary, bonus, or other compensation beyond their share of profits, the operating agreement should document this explicitly. If members will loan money to the LLC or guaranty business debt, include terms for repayment and interest.

7. Buy-Sell Provisions

Include a plan for what happens if a member wants to leave, retire, or becomes disabled or dies. A buy-sell clause might specify that remaining members have the right to buy out the departing member's share at a formula price, or that the LLC will purchase the share using life insurance proceeds. Without this, the departing member's estate may be stuck holding an illiquid interest in an operating business.

8. Withdrawal and Dissociation

Define the process for a member to withdraw from the LLC and whether withdrawal is permitted at all. Under Illinois law, a member of a member-managed LLC can dissociate at any time by notice, effective on the date of notice or a later date the member specifies; a member of a manager-managed LLC cannot dissociate before dissolution unless the operating agreement says when. The operating agreement can set these terms. Specify whether the LLC continues if a member leaves or if the LLC dissolves.

9. Dispute Resolution

Include a method for resolving disputes between members, such as mediation or arbitration, before resorting to litigation. This can save time and money.

10. Amendment and Termination

State how the operating agreement can be amended (unanimous consent, majority vote, or by designated members). Define the conditions under which the LLC dissolves and how assets are distributed.

Special Rules for Series LLCs

Illinois recognizes series LLCs, which allow you to create separate "series" within a single LLC, each with its own assets, liabilities, and members. A series LLC is useful if you operate multiple business lines and want to isolate liability between them.

For a series LLC, you must document the series in your operating agreement. Each series can have its own operating terms, management structure, and members. Without an operating agreement specifying the series, the separate liability protection may not hold if challenged.

Default Rules When Your Operating Agreement Is Silent

If your operating agreement does not address a particular issue, Illinois law fills the gap. Here are the key defaults:

• Management: The LLC is member-managed (all members have authority to act).
• Profit and Loss Allocation: Split equally among members, regardless of capital contributed.
• Distributions: Made in equal shares among members before dissolution, unless the operating agreement says otherwise.
• Voting: In a member-managed LLC, each member has equal management rights, ordinary matters are decided by a majority of members, and listed major matters (such as admitting a member or amending the operating agreement) need all members.
• Amendment: The operating agreement can only be amended by unanimous consent of members (unless the agreement provides otherwise).
• Dissociation: A member of a member-managed LLC can dissociate at any time by notice; a member of a manager-managed LLC cannot dissociate before dissolution unless the operating agreement allows it.
• Transferability: A member's financial interest is transferable, but transfer does not make the transferee a member without consent of all remaining members.

Who Should Draft Your Operating Agreement

While many online templates exist, an operating agreement is not the place to save a few hundred dollars. A business attorney familiar with Illinois LLC law can customize an agreement to your specific circumstances and avoid costly oversights. Ask attorneys for a quote, since cost depends on complexity.

If your LLC is taxed as an S corporation, or if profits and capital do not align, a CPA should review the operating agreement to make sure it supports your tax elections.

Disclaimer: This article is informational only and is not legal or tax advice. Do not rely on this content to make business or legal decisions. Consult a licensed Illinois attorney and a CPA to discuss your LLC's specific needs and ensure your operating agreement complies with state law and tax requirements.

Key Takeaways

• An operating agreement is not filed with the state, but it governs the internal rules of your LLC.
• Illinois law does not require one, but lenders and investors usually ask for one.
• Without a written agreement, Illinois defaults to equal profit sharing and member management.
• A written agreement clarifies roles, profit distribution, decision-making authority, and what happens when members leave.
• Series LLCs must document their series structure in the operating agreement.
• An attorney should draft or review your operating agreement to ensure it protects your interests and complies with tax law.

Next Steps

If you have already formed your Illinois LLC and do not have a written operating agreement, consult an attorney to create one as soon as possible. If you are still in the formation stage, have your attorney prepare the operating agreement before you begin operations. The small upfront cost will protect your business and prevent disputes later.