Insights

How to End a Business Partnership in Illinois

By:

Paul King

December 15, 2025
8:15 pm

Ways to End a Business Partnership

Business breakups are stressful, time-sensitive, and often result in lost value for everyone. This article provides practical, Illinois-focused points to consider for ending partnerships, LLCs, and corporations.

You’ll probably want to talk to a Chicago partnership dispute lawyer to help you understand your rights and obligations to your fellow partners, members, managers, and shareholders. It also helps to know the main routes out before you choose one.

Generally, there are three paths to separate: negotiated separation (buyout), structured non-litigation processes (mediation, arbitration, or dissociation), and litigation (court-ordered buyout, dissolution, or receivership). Often, multiple paths are used sequentially. For example, you may start with negotiation, then, if required by governing documents, proceed to mediation, before filing litigation.

A Buyout or a Sale

In a negotiated buyout, owners agree on terms for one (or more) owners to sell their interest to the remaining owners or to a third party. If the partnership agreement includes a buy-sell provision, you can buy out the partner at a price provided in the agreement or using the formula provided. If no one wants to stay, you can opt to sell the business entirely to a new owner.

A negotiated buyout preserves value, is faster, is lower cost, and ensures confidentiality. The trade-off is that it requires buyout funds or financing, and the parties must agree on value.

Restructuring Instead of a Full Exit

Not every split has to end the company. Some owners restructure by changing roles, ownership shares, or who runs the business day to day. In an equity swap, selling owners get securities in another entity or are paid in assets.

Mediation and Arbitration

Mediation is nonbinding and helps parties structure a buyout or separation plan with a neutral facilitator. Arbitration is binding if parties agreed, and arbitrators can award buyout amounts or order specific relief. Both are confidential, faster than court, and help preserve business continuity, but mediations require good faith, and arbitration awards are hard to appeal if problematic.

Dissolution

Partnership dissolutions differ from partnership expulsions because they don’t involve legally forcing another party out of the partnership. These happen for a variety of reasons. In best-case scenarios, one of the partners simply decides that it’s time to go in another direction, and the partners come to the common realization that it’s time to part ways. Partnerships may also be dissolved when one of the parties passes away or becomes unable to participate in business operations as outlined by the original agreement.

Check the Partnership Agreement First

No one enters into a business partnership planning on getting into a dispute with the other party, but like all relationships, business partnerships are subject to the usual pitfalls. Businesses are works in progress, and issues that seem insignificant at the beginning may take on greater importance as the nature and goals of the business change over the years. Reasons for ending a partnership could be as simple as one party retiring or as serious as one party committing a criminal offense.

In most cases, partnership disputes are covered under the original partnership agreement. However, the termination of a partnership isn’t always cut-and-dried, especially among those who may not have entered into a formal agreement at the start of their collaboration. As an additional complication, some agreements can be interpreted in a variety of ways. Although this guide focuses on partnerships, all forms of closely held businesses, whether partnerships, LLCs, or corporations, are often treated similarly by the courts.

The most important starting points are the governing documents, such as Operating Agreements, bylaws, the Partnership Agreement (for partnerships), the Member or LLC Agreement (for LLCs), and the Shareholder Agreement (for corporations). Sometimes, more than one of these agreements exists. As an owner of the business, you’re always entitled to see a copy of the governing documents, so just ask (in writing). If a co-owner won’t share them, our guide to books and records requests explains how owners seek access.

Locate the governing documents and review relevant clauses like exit, right-of-first-refusal, deadlock, buyout, and dissolution. Before you act, look for:

Exit terms: how an owner can leave and what starts a buyout or a dissolution.
Buyout terms: who can buy, at what price or formula, and on what payment schedule.
Notice terms: the way notice is given, who receives it, and the time allowed for a reply.
Dispute terms: whether mediation or arbitration has to come before a lawsuit.

It’s also important to note that aspects of partnership agreements that are in direct conflict with state laws will cause uncertainty in the parties’ relationship. For example, in many states, fiduciary obligations cannot be drafted out of agreements.

Partnership Law When the Agreement Is Silent

As with other legal issues involving partnerships, state law prevails in the absence of a legally binding partnership agreement. Illinois has statutes that fill gaps in the agreements, supplement them, and sometimes override them. Some of the primary Illinois statutes governing the dissolution, winding up, and dissociation of partnerships, LLCs, and corporations are:

Partnerships (Uniform Partnership Act): general rules and winding up, 805 ILCS 206/.
Limited Liability Companies: the state’s LLC statute covers dissociation and dissolution.
Corporations (Business Corporation Act): dissolution, shareholder votes, and winding up, 805 ILCS 5/.

Whether you signed a written agreement also shapes your options. A partnership through an agreement exists contractually, and the agreement governs the term of the partnership. An at-will partnership is for an indefinite duration, and it exists through the consent of all the partners. If you have an at-will partnership (which you really should avoid if possible), any partner can dissolve the entire partnership whenever they want.

Without written terms, partners often have less control over timing, price, and who keeps the business. Default rules may settle questions the partners never discussed, in ways no one expected. Our article on removing a toxic business partner in court looks at how these partnership types play out in a forced exit.

Valuing the Business or a Partner’s Share

Price is where many exits stall. A buyout or a sale needs a number both sides can accept, and an appraisal is often how they get there.

Consider a valuation expert and tax advisor before agreeing on a price. When choosing an expert, look for industry experience, litigation support ability, and prior testimony if litigation is possible. Use a neutral appraiser if parties disagree. Expert determination or appraisal panels are good where valuation formulas exist, but a dispute remains. Parties can hire separate experts to value the company, or agree on a single expert to do so.

Common methods are discounted cash flow (DCF), market multiples (EBITDA multiple), and adjusted book value. Adjustments to watch include related-party transactions, owner compensation normalization, one-time gains or losses, working capital adjustments, and limited marketability.

Here is a sample simple buyout formula (illustrative, not prescriptive): Purchase Price = (Normalized EBITDA × Agreed Multiple) − Net Debt + Pro-Rata Working Capital Adjustment.

How the Price Gets Paid

Common forms of buyout include:

Fixed price buyout: use an agreed formula in the governing documents or an appraisal.
Installment buyout: purchase price paid over time with security (e.g., promissory note, UCC-1 lien).
Earnout or contingent payments: purchase price tied to future performance.

Payment structures can be a lump sum (best for seller tax planning), a seller note with security (buyer liquidity relief), or a combination. Always coordinate valuation with tax counsel. The form of payment (capital gain vs. ordinary income) and entity type materially affect tax outcomes.

Winding Up the Business

Winding up is the work of closing out the business once the owners decide to end it. In general, that means finishing or handing off open work, collecting what the business is owed, paying what it owes, and then dividing what is left.

Conflicts and disagreements are often part of the picture, and dissolutions typically become more complex when the original partnership agreement doesn’t cover procedures for terminating the partnership. Disputes that typically arise during the process of terminating a partnership include:

How the assets are to be divided
How the debts are to be paid
Buyout provisions
The value of each partner’s share of the business

A practical winding-up checklist:

Inventory assets and liabilities and secure bank accounts and passwords if necessary.
Lock down bank access gracefully: change signers by agreement or court order if theft is suspected.
Pay or settle business debts, and confirm in writing who is answerable for any debt left open.
Close and implement transition (transfer contracts, inform employees and customers, update registrations).
File necessary statutory statements (e.g., statement of dissolution for a partnership or termination for LLC) under Illinois law.
Record and document tax elections and make final tax filings.
Close business bank accounts, licenses, and tax accounts once the final payments clear.

Coordinate tax planning early, since buyouts can have unexpected tax consequences. Plan for employees and customers, with retention packages or transition notices as part of the deal.

Notice and Written Exit Papers

A clean split is a documented one. Written notice and signed exit papers show what each owner agreed to, and they help keep the same fight from starting again later.

Give notice the way your agreement describes. If it says how notice is delivered, to whom, or by when, follow those steps and keep proof of delivery. Notice that skips those steps can give the other side a reason to challenge your exit.

Negotiate a term sheet for the buyout (price, payment schedule, security, transition). Then draft purchase documents: purchase agreement, promissory notes, security agreements, releases, confidentiality clauses, and transition services if needed. Draft with clarity on timing, notice, payment terms, and default remedies (i.e., interest, acceleration, security). Address noncompete, non-solicit, and transition, and use narrowly tailored restrictive covenants to enhance enforceability.

Every owner should sign the final papers and keep a full signed copy. Document everything: meeting minutes, emails, and contemporaneous notes matter if a dispute becomes litigation. Don’t destroy records, because document retention spoliation is fatal in litigation.

When Partners Disagree About the Exit

Partners who agree on terms may only need a lawyer to review the papers. When partners disagree, the costs rise quickly. You’ll want to hire a lawyer who won’t cost a disproportionate amount compared to the value of the business (e.g., a restaurant with $250,000 in annual profit probably shouldn’t pay $50,000 for legal counsel for each stakeholder to wind up the business).

Litigation is commonly used in deadlocks, breaches of fiduciary duty, insolvency, or when statutory dissolution is triggered, and the parties cannot agree. If any of the following occurs, a lawsuit may be your best response:

Active misappropriation of assets or imminent insolvency.
Clear and material breaches of fiduciary duty (fraud, theft).
Deadlock that halts business and threatens asset loss, and where agreement on ADR is impossible.
Failure to honor the agreed buyout or payment default with no cure.
Diversion of corporate opportunities or competing with the business.
Refusal to provide business records.

If these occur, preserve evidence, send a demand letter via counsel, and consider emergency relief (temporary restraining order, appointment of receiver). If a partner has taken money, see what to do if a business partner steals.

For claims between owners more broadly, read whether you can sue your business partner.

Remedies available in Illinois include:

Judicial dissolution: a court may dissolve or wind up a partnership, LLC, or corporation in appropriate circumstances (e.g., where it’s not reasonably practicable to carry on the business).
Court-ordered buyout: courts sometimes order a buyout of a dissenting owner rather than dissolution to preserve employment and value.
Receivership: for mismanagement or asset dissipation, a receiver may be appointed to preserve assets.

Litigation imposes a legal resolution if parties cannot cooperate, but it is expensive, public, slow, and unpredictable. Claims of breach of fiduciary duty are a common reason owners end up in court.

For other things that may necessitate litigation, check out our article “Ways Partners Commit Fraud.”

Where a case is filed matters too, and our page on DuPage County business litigation covers disputes outside the city. For example, a business case filed in DuPage County goes to the 18th Judicial Circuit, which sits in Wheaton at the DuPage County Judicial Center.