Insurance for Lawyers and Law Firms
A missed deadline, a conflict nobody caught or a wire sent to a fraudster can each become a claim against the firm. We arrange malpractice and office coverage for California lawyers, from solo practices to small partnerships.
Malpractice coverage and Rule 1.4.2
California does not make lawyers carry professional liability insurance. Rule 1.4.2 of the California Rules of Professional Conduct requires disclosure instead: a lawyer who knows or reasonably should know they have no malpractice coverage must tell the client in writing at the time of engagement. If coverage ends partway through a representation, the lawyer has 30 days from when they knew or should have known to say so in writing. The rule’s comment applies the duty to new clients and to new matters for returning ones.
Four exceptions apply: matters the lawyer expects to take four hours or less (until they run past four), government lawyers and in-house counsel acting in that role, emergency work to protect a client’s rights, and clients already told in writing. Oregon’s Professional Liability Fund notes that Oregon and Idaho are the only states requiring lawyers to carry malpractice coverage. In California, a 2019 State Bar report cited by the California Lawyers Association found that 39% of solo attorneys and 12% of small firms surveyed had none.
We arrange professional liability (E&O) for lawyers. Underwriters start from the application: who the attorneys are, how long each has practiced, how fees and hours split across practice areas, and what the firm does to prevent missed deadlines and conflicts. Our professional liability page explains how the coverage responds once a claim arrives.
What malpractice claims look like
The American Bar Association’s profile of legal malpractice claims for 2020 to 2023, as summarized in Attorney at Law Magazine, ranks estate, trust and probate work first by number of claims, followed by real estate, plaintiff personal injury, family law, collections and bankruptcy, and business transactions. One insurer’s review of the same study puts estate, probate and trust matters at about 14% of reported claims and calls conflicts of interest one of the most frequently alleged errors.
That review also found more claims over proceedings not commenced in time, settlement negotiations and administrative errors. Underwriters ask about exactly those systems after the practice-area split: how deadlines are calendared, how new matters clear a conflict search, and whether engagement letters define the scope of work.
Practice areas, firm size and how malpractice is rated
Lawyers’ professional liability is priced per attorney. One insurer explains that step rating is applied attorney by attorney, so a lawyer new to claims-made coverage starts at a discounted rate that rises at each renewal, with the largest jump between the first and second year and maturity usually after five years. A firm that adds lateral hires carries attorneys at different steps on the same policy.
Practice mix moves the rate as much as headcount. A firm that adds real estate closings or plaintiff personal injury to a business practice changes its profile, since both rank near the top of the ABA claim counts. The California Lawyers Association notes that some insurers offer specialty rates for practice areas such as immigration, arbitration and mediation. Lawyers who also sell nonlegal advisory work for a fee should read our guide for consultants and describe that work separately.
A solo practitioner buys a policy around one name. A small firm adds questions about of counsel and contract attorneys, who need to be listed or fall within the policy’s definition of who is covered, and about lawyers who leave, since their past work at your firm remains the firm’s exposure.
Claims-made coverage, prior acts and the tail
Malpractice policies are claims-made: the policy in force when a claim is first made responds, as long as the work came after the retroactive date. In IRMI’s terms, prior acts coverage lets a claims-made policy answer for events that happened before its own term. A lawyer joining a new firm should find out whether the new firm’s policy covers their earlier work or whether that work stays with the old firm’s policy and a tail. Insurance agencies face the same handoff when an owner sells, as our page on insurance for insurance agents explains.
Retirement is the other trigger. IRMI defines a nonpracticing extension as an extended reporting period endorsement, carrying no premium, that professional liability insurers sometimes grant when the insured retires, dies or becomes disabled, usually after at least five years with that insurer. Without one, a retiring lawyer buys a tail, because a will drafted years earlier can still produce a claim long after the office closes. Changing insurers shortly before retiring can restart that five-year count, so check it before you move.
Trust accounts, wire fraud and cyber
Under the State Bar’s Client Trust Account Protection Program, every licensee responsible for client funds registers each trust account by bank routing and account number, certifies compliance with the trust accounting rules and completes an annual self-assessment. The bigger danger to those accounts comes through email. One broker’s 2026 analysis describes business email compromise aimed at trust accounts, where someone posing as a client, opposing counsel or a title company sends new wire instructions and the firm sends the money in good faith.
The same analysis explains why these losses often go unpaid. A person at the firm authorized the transfer, so cyber policies generally treat it as voluntary, and the computer fraud and funds transfer fraud agreements in a crime policy carry their own conditions. Social engineering coverage, usually added to a crime policy by endorsement, fits the scenario best, but its sublimit often sits far below a settlement or escrow payout, so match it to the largest wires you send. A callback on a number already in the file before any change to wire instructions is the control that counts.
A data breach is a separate exposure. The State Bar’s Formal Opinion 2020-203 says lawyers who keep client information on electronic devices must take reasonable steps to secure it and, after a breach, make a reasonable inquiry and notify clients whose interests could be harmed. A cyber insurance policy pays for the forensic work, notification and defense that follow.
LLPs, law corporations and the owners’ exposure
California ties malpractice security to two firm structures. Under Corporations Code section 16956, a registered limited liability partnership providing legal services must carry insurance with an aggregate limit of at least $1,000,000 when it has five or fewer licensees, plus $100,000 for each additional licensee, with the requirement capped at $7,500,000. The policy can be claims-made or occurrence and can carry a deductible or retention. Unless the partnership meets the net-worth alternative, each partner guarantees any shortfall between the required security and what the firm holds.
A law corporation registers with the State Bar and, under State Bar Rule 3.158, files a guarantee in which its shareholders jointly and severally agree to pay errors and omissions claims established against the corporation. The State Bar’s schedule sets the amounts, which rise with the number of attorneys. For an owner, that guarantee is the management exposure, and a malpractice policy at or above those figures stands between a claim and the shareholders’ own assets.
The office, the staff and employment claims
Property for files, computers and furniture, plus general liability for a visitor hurt in the conference room, usually come packaged in a business owner’s policy. The Division of Workers’ Compensation requires coverage once a California employer has even one employee, and the WCIRB places the entire firm in class 8820, Law Firms, which takes in attorneys, clerical employees and outside salespersons alike, counting each person’s pay up to $171,600 a year.
Employment exposure starts with the first hire too. According to the Civil Rights Department, no workplace is too small for the harassment ban, while the discrimination rules and sexual harassment training requirement start at five employees. Employment practices liability insurance responds to claims such as a paralegal’s discrimination charge or an associate’s wrongful termination suit, which a malpractice policy is not written to answer.
What law firm insurance costs
Published malpractice medians are thin, partly because the large online marketplaces do not quote it; one says plainly that it cannot provide professional liability quotes for lawyers. Oregon’s mandatory fund gives a public reference point, with a 2026 assessment of $3,500 per lawyer for $300,000 per claim and in aggregate, plus a $75,000 claims expense allowance. For the rest of a small firm’s program, that marketplace reports medians among lawyers of $29 a month for general liability, $57 for a business owner’s policy, $52 for workers’ compensation and $175 for cyber. These are published figures for solo and very small firms at standard limits, not a Mithril1 quote, and established firms pay well above them.
Malpractice scales with attorney count, step and practice mix, while payroll drives workers’ comp. The WCIRB’s advisory pure premium rate for class 8820 is $0.213 per $100 of payroll from September 1, 2026. A firm with two partners paid $240,000 each and two staff members paid $75,000 each counts each partner at the $171,600 cap, for $493,200 of payroll, or about $1,051 before the insurer adds the expenses pure premium rates leave out.
Your premium runs higher with a practice weighted toward estate, real estate or plaintiff personal injury work, a prior claim, higher limits, attorneys past their early steps and large trust account wires. It runs lower with a narrow practice in an area that earns specialty rates, written engagement letters, reliable docket and conflict systems, a higher deductible and lawyers still early in the step schedule. The quote sets the actual price.
A few useful answers
Common questions
Do California lawyers have to carry malpractice insurance?
No. Rule 1.4.2 requires a lawyer without coverage to say so in writing at the start of an engagement, with exceptions for matters of four hours or less, in-house and government work, emergencies and clients already told.
Why does my malpractice premium rise each year with no claims?
Claims-made lawyers’ policies are step rated per attorney, rising at each renewal until the attorney matures, usually after five years. The biggest increase tends to land between the first and second year.
Does malpractice insurance respond if we wire client funds to a fraudster?
Look first to a crime policy with social engineering coverage. Cyber policies generally treat a transfer someone at the firm authorized as voluntary, and the social engineering sublimit needs to match the size of the wires you send.
What coverage do I keep when I retire?
Ask whether your policy offers a nonpracticing extension, a no-premium extended reporting period some insurers grant on retirement, death or disability, usually after five years with the same insurer. If it does not, buy a tail before the last policy ends.
What does a law corporation owe on malpractice claims?
Its shareholders sign a guarantee under State Bar Rule 3.158 agreeing to pay errors and omissions claims established against the corporation, in amounts set by the State Bar’s schedule. Malpractice insurance is what stands between those claims and that personal promise.