California Retainer Agreement Law: Required Terms and Fee Disputes

California retainer agreement law requires most attorney-client fee arrangements to be in writing whenever total costs are reasonably expected to exceed $1,000, and it gives you the right to void the agreement, fire your lawyer at any time, and force fee disputes into arbitration. The core rules sit in two statutes: Business and Professions Code section 6148 for standard hourly or flat-fee work, and section 6147 for contingency arrangements. If your attorney skips a requirement, the consequence falls on the attorney, not on you.

When a Written Agreement Is Required

An attorney must give you a written fee agreement whenever it’s reasonably foreseeable that your total costs — legal fees plus expenses — will exceed $1,000.¹ At typical billing rates, a few hours of work crosses that line, so the rule covers almost every representation. The signed copy has to be in your hands at the time the agreement is made.

Contingency fees — where the attorney gets paid only if you win — follow a separate statute with stricter rules, and the written agreement is required regardless of the dollar amount.

Exceptions

Four situations let an attorney skip the written agreement even when fees will exceed $1,000:¹

Emergency services, when immediate action is needed to protect your rights and drafting a contract would cause harmful delay.
Repeat engagements, when the attorney has previously performed the same general type of service for you and you paid for it.
Corporate clients, which are entirely exempt.
Client waiver, which must itself be in writing and follow a full explanation of the statutory requirement.

The repeat-engagement exception gets overlooked. If you’ve hired the same lawyer several times for similar work at the same rate, the law doesn’t demand a fresh contract. Asking for one anyway is still the safer move.

What a Standard Fee Agreement Must Say

A compliant agreement under section 6148 must spell out three things:¹

How you’ll be charged. Every basis of compensation — hourly rates, flat fees, statutory fees, and any other standard charges. If a senior partner, a junior associate, and a paralegal all bill at different rates, each rate must appear.
What the attorney will do. A general description of the services, specific enough to show scope. “Represent you in your divorce proceedings” works; “provide legal services” doesn’t.
Who is responsible for what. The duties on both sides — the attorney’s work on your case, and your obligations around documents, responsiveness, and payment.

Billing Statements You Can Demand

Section 6148 also controls how bills must look. Every statement must show how the charges were calculated: the amount, the rate, and the method used for the fee portion, with an itemized breakdown of costs and expenses.¹ If you request a bill, the attorney has 10 days to send one, and you can request another every 30 days after that. You don’t have to wait for the firm to decide when to invoice.

Electronic Signatures

California’s Uniform Electronic Transactions Act treats an electronic signature as equivalent to a handwritten one, and fee agreements aren’t on the excluded list.² A retainer signed through DocuSign or a similar platform is valid. The attorney still has to give you a signed copy.

Contingency Fee Agreements

Section 6147 governs any arrangement where the lawyer takes a percentage of your recovery instead of billing you by the hour. These contracts must be in writing, signed by both you and the attorney, with a copy delivered to you at signing, and they must include:³

The agreed fee percentage.
How costs affect your recovery — specifically, whether litigation expenses are deducted before or after the attorney’s percentage is calculated. That one detail can swing your net recovery by thousands of dollars.
Whether you could owe additional compensation for related matters that fall outside the contingency arrangement.
A statement that the fee percentage is not set by law and was negotiated between you and the attorney.

That last requirement exists because many clients assume contingency rates are fixed. They aren’t. An attorney who tells you “the standard rate is 33%” is describing market practice, not a legal floor. You can negotiate a lower percentage, a sliding scale that depends on when the case resolves, or a cap on total fees.

Medical Malpractice Fee Caps

Professional negligence claims against healthcare providers are the one category where California caps contingency fees by statute. Under section 6146, an attorney cannot collect more than 25% of the recovery if the case settles before a lawsuit or arbitration demand is filed, or more than 33% if it resolves after that.⁴ If the matter goes to trial or arbitration, the attorney can ask the court to approve a higher percentage on a showing of good cause.

“Recovered” in this statute means the net amount after litigation costs, not the gross settlement figure. Your medical care costs and the attorney’s office overhead cannot be subtracted as deductible costs for this calculation.⁴ When a contingency agreement involves medical malpractice, it must state that the statutory percentages are the maximum limits, not simply that fees are negotiable.³

Where Your Retainer Money Has to Sit

Money you pay in advance isn’t the attorney’s yet. Under California’s Rules of Professional Conduct, advance fee payments must go into a designated client trust account, separate from the firm’s own funds, and the attorney can only withdraw money as fees are actually earned or expenses actually incurred.⁵ If representation ends early, you’re entitled to a refund of whatever hasn’t been earned.

Flat fees have a narrow exception. An attorney can deposit a flat fee straight into the firm’s operating account, but only after disclosing in writing that you have the right to require the fee be held in trust and that you’re owed a refund of any unearned portion.⁵ For flat fees over $1,000, both the disclosure and your agreement must be in a signed writing. If that disclosure didn’t happen, the fee belongs in trust, and you can ask where your money is being held.

If the Agreement Doesn’t Comply

A missing written agreement, an incomplete contingency contract, or a fee agreement that leaves out required information has one consequence: the agreement becomes voidable at your option.¹ You decide whether to enforce it. The attorney doesn’t get that choice. Noncompliant contingency agreements under section 6147 carry the same consequence.³

If you void the agreement, the attorney cannot hold you to the original fee. Not the hourly rate. Not the contingency percentage. Instead, the attorney is limited to collecting a reasonable fee for work already performed, measured by factors like complexity, time, and outcome rather than by whatever the defective contract said.¹ In contingency cases, voiding an agreement that promised the attorney 40% of a large settlement can produce a dramatically lower fee.

Your Right to Fire Your Attorney

You can discharge your attorney at any time, for any reason. The right is well established in California case law and codified in the Rules of Professional Conduct, which list client discharge as a mandatory ground for withdrawal.⁶ A retainer agreement cannot override this. Any clause that purports to lock you in is unenforceable.

Firing an attorney doesn’t erase what you owe for work already done. The lawyer is generally entitled to compensation for completed work, and in contingency cases a discharged attorney may hold a lien on any future recovery for the reasonable value of services provided. But you’re never trapped in the relationship.

When representation ends, the departing attorney has duties to you: enough notice to find new counsel, release of your files and documents, and a refund of any advance fees not yet earned.⁶ If your case is already before a court, the attorney generally needs the court’s permission before withdrawing.

Fee Arbitration If You Think You Were Overcharged

If you believe your attorney overcharged you, Business and Professions Code section 6200 gives you a tool that most clients don’t know about. When you initiate fee arbitration, the attorney is required to participate. It’s voluntary for you, mandatory for them.⁷

The deadline matters. If an attorney sues you or threatens to sue over unpaid fees, they must first send a written notice of your right to arbitrate. You then have 30 days to request arbitration. Miss that window and you lose the program. Once you file, any lawsuit over the fees is paused until the arbitration concludes.⁷ The award becomes binding 30 days after you receive notice of the decision, unless either side requests a trial within that window. The program runs through the State Bar and local bar associations, and it’s faster and cheaper than fighting a fee dispute in court.

1
California Legislative Information. California Business and Professions Code 6148
2
California Legislative Information. California Civil Code Title 2.5 – Uniform Electronic Transactions Act
3
California Legislative Information. California Business and Professions Code 6147
4
California Legislative Information. California Business and Professions Code 6146
5
State Bar of California. California Rules of Professional Conduct Rule 1.15 – Safekeeping Funds and Property of Clients
6
State Bar of California. California Rules of Professional Conduct Rule 1.16 – Declining or Terminating Representation
7
California Legislative Information. California Business and Professions Code Article 13 – Arbitration of Attorneys Fees