Business Mediation in California: What Happens, What Stays Confidential, and What Binds You

Last updated: November 2026. Reviewed by Pavel Kolmogorov, California business litigation attorney (State Bar No. 321018).

Mediation is a confidential settlement negotiation led by a neutral mediator who has no power to decide the dispute. In California, what is said or written for a mediation generally cannot be used as evidence in a later civil case, under Evidence Code section 1119. You are bound only if you agree to a settlement, normally in a signed writing. Kolmogorov Law, P.C. represents businesses at mediations in Orange County, Los Angeles, and throughout California, before and after a lawsuit is filed.

Call (909) 235-6116 or contact us online to discuss a mediation that has been proposed, ordered, or required by your contract.

What mediation is and what a mediator does

The Evidence Code defines mediation as a process in which a neutral person facilitates communication between the disputants to assist them in reaching a mutually acceptable agreement. (Evid. Code, § 1115, subd. (a).) The mediator is not a judge. A mediator cannot order anyone to pay, cannot rule on who is right, and cannot make you sign.

Owners usually arrive at mediation one of three ways. The contract requires it before anyone sues. A judge raises it at the case management conference. Or the other side proposes it.

What happens on the day

Before the session, each side sends the mediator a brief with the key documents. On the day, the parties usually sit in separate rooms, in person or by video, and the mediator moves between them carrying offers and questions.

Expect a slow morning and real movement late in the afternoon. If the gap narrows but does not close, many mediators make a "mediator's proposal": one number that each side accepts or rejects in confidence.

The person with authority to settle should attend. The business must also know its own numbers: what trial would cost, what it could win, and what it can afford.

Mediation confidentiality in California

California protects mediation more firmly than almost any other kind of negotiation. No evidence of anything said, and no admission made, for the purpose of, in the course of, or pursuant to a mediation is admissible or subject to discovery in a civil action or arbitration. (Evid. Code, § 1119, subd. (a).) Writings prepared for the mediation get the same protection, and all communications between participants stay confidential. (Evid. Code, § 1119, subds. (b), (c).)

The protection is close to absolute. The California Supreme Court has held that the statutes must be applied by their plain terms unless that would violate due process or produce absurd results. (Cassel v. Superior Court (2011) 51 Cal.4th 113, 119, 137-138.) There, the rule reached even a client's private talks with his own lawyers about the mediation.

The mediator cannot send the judge a report or recommendation, other than a required report that says only whether an agreement was reached, unless all parties expressly agree otherwise. (Evid. Code, § 1121.) And the protection continues after the mediation ends. (Evid. Code, § 1126.)

There are limits. Evidence that was admissible before the mediation does not become protected because someone showed it to the mediator. (Evid. Code, § 1120, subd. (a).) An invoice is still an invoice. Protected communications can also be disclosed if everyone who took part, the mediator included, expressly agrees, generally in writing. (Evid. Code, § 1122, subd. (a)(1).)

Because the rule is that broad, your lawyer must usually hand you a one-page printed disclosure and get your signed acknowledgment before you agree to mediate. (Evid. Code, § 1129, subds. (a), (c)(2).) Read it.

Is mediation binding? Making the settlement enforceable

Mediation itself binds no one. Either side can leave without a deal, and the case continues.

A settlement reached there is a contract like any other, but confidentiality sets a trap. A term sheet signed late in the evening is itself a writing prepared in the course of a mediation. It escapes the confidentiality bar if the settling parties sign it and it says that it is enforceable or binding, or admissible, or words to that effect. (Evid. Code, § 1123, subds. (a), (b).) The statute lists other routes, but that sentence is the reliable one. Without it, the party trying to enforce the deal may be unable to put the document in front of a judge.

If a lawsuit is pending, the agreement should also ask the court to retain jurisdiction to enforce it, which allows a motion for judgment instead of a new lawsuit. (Code Civ. Proc., § 664.6, subd. (a).) See our pages on enforcing settlement agreements and on the release and the section 1542 waiver.

Mediation vs arbitration

An arbitrator hears evidence and issues an award that a court will ordinarily confirm as a judgment, with very limited review. A mediator decides nothing. You can lose an arbitration. A mediation can only fail to settle.

Some contracts require both in sequence. Our comparison of arbitration and litigation covers the second step.

When to mediate, and what your contract may require

Timing drives results. Mediating before suit saves the most money, but each side knows the least. In the disputes I handle, the session tends to work best once each side has seen the other's strongest documents.

Check the dispute resolution clause before doing anything else. Many form contracts say that a party who files suit without first offering to mediate, or who refuses a request to mediate, cannot recover attorney fees even if it wins. California courts have enforced that kind of clause. A reflexive "no" to a mediation request can forfeit a fee award worth far more than the session would have cost. Our page on attorney fees clauses explains how those awards work.

One caution. Do not assume that scheduling a mediation pauses the statute of limitations. If the deadline is near, sign a tolling agreement before you agree to wait.

How we prepare a business for mediation

We prepare for mediation the way we prepare for a hearing: a brief built on the documents, a damages figure the other side can check, and a draft settlement agreement ready before the session starts.

If the case does not settle, it continues in court. See our civil litigation practice page and our overview of strategies for resolving business disputes.

What to bring to the first meeting

The contract, including its dispute resolution and attorney fees clauses.
Any written request to mediate, court order, or letter from the other side.
The key emails, invoices, and payment records.
A realistic estimate of what you are owed, or of what is claimed against you.
The names of the people who must approve a settlement.

Frequently asked questions

The other side in our contract dispute suggested mediation. Can anything I say there be used against me later?

Generally no. Under California Evidence Code section 1119, statements and admissions made for the purpose of, or in the course of, a mediation are not admissible or discoverable in a later civil case or arbitration. The protection does not hide evidence that existed independently, such as contracts, invoices, and emails written before the mediation.

We signed a short term sheet at the end of a mediation. Is that settlement enforceable in California?

It can be, if it was drafted correctly. Evidence Code section 1123 lets a written settlement reached in mediation be used in court when the settling parties signed it and it states that it is enforceable or binding, or words to that effect. A term sheet missing that language can be hard to prove, because mediation confidentiality otherwise covers writings prepared during the session.

Is mediation binding?

No. A mediator in California has no power to impose a result, and either party may end the session without an agreement. What binds the parties is the settlement they reach, normally a written agreement they sign. If a lawsuit is pending, the court can enter judgment on that agreement under Code of Civil Procedure section 664.6.

What is the difference between mediation and arbitration?

In arbitration, a private decision-maker hears evidence and issues an award that California courts will confirm as a judgment except on narrow statutory grounds. In mediation, a neutral helps the parties negotiate and decides nothing. Mediation ends with a signed settlement, or with the dispute continuing in court or arbitration.

Do I have to mediate before filing a lawsuit in California?

Only if a contract or a specific statute requires it. Many business contracts make an offer to mediate a condition of recovering attorney fees, and California courts have denied fees to prevailing parties who refused to mediate under those clauses. Read the dispute resolution clause before filing, and before turning down a request from the other side.

Talk to a California business litigation attorney

If mediation has been proposed, ordered, or is required by your contract, call (909) 235-6116 or contact us online. Kolmogorov Law, P.C. is located at 327 Magnet, Irvine, CA 92618, and represents businesses in Orange County, Los Angeles, and throughout California.

This page provides general information about California law and is not legal advice. Outcomes depend on the contract, the facts, and the people in the room.