Professional Liability Insurance for Accountants
Professional liability insurance, usually called errors and omissions (E&O) coverage, protects an accountant or CPA when a client claims that their work caused a financial loss. It pays for legal defense and any settlement, even when the claim has no merit. For accountants, this is the coverage that answers the central risk of the profession: a client, or a tax authority, who says a mistake in your work cost them money.
What E&O covers for accountants
Accountant E&O responds to claims arising from the professional services you provide. Common triggers:
- Errors in tax preparation that lead to penalties or a larger liability
- Mistakes in an audit, review, or compilation
- Bookkeeping or reconciliation errors that cause a client loss
- Missed filing deadlines
- Bad or disputed advisory work the client relied on
The policy pays your defense costs, often the largest expense even on a groundless claim, plus settlements up to your limit. For a solo CPA or a growing firm, a single disputed engagement can generate legal fees far beyond the annual premium.
Why accountants carry it
- Client contracts. Business and enterprise clients frequently require proof of E&O at a set limit before engaging you.
- Licensing and standards. Accounting work carries professional standards and exposure to board complaints and third-party claims; E&O funds the defense.
- The nature of the work. Tax positions, audit opinions, and financial advice are exactly the kind of high-stakes judgment that generates "your mistake cost us money" claims.
How it differs from general liability
E&O is not general liability. GL covers bodily injury and property damage, for example a client who slips in your office. It does not cover a financial loss caused by your accounting work. An accountant with an office clients visit usually needs both, often with GL bundled into a business owner's policy (BOP) and E&O as a standalone policy.
What drives the premium
- Firm revenue and the size of engagements
- Services offered (audit and attest work generally carries more exposure than bookkeeping)
- Coverage limits (clients may dictate a minimum)
- Claims history
- Retroactive date and years of continuous coverage
Accountant E&O is usually written on a claims-made basis, so keeping continuous coverage and protecting your retroactive date matter as much as the limit. If you change insurers or wind down a practice, ask about tail coverage so late claims on past work stay covered.
How to get covered
- An independent agent can quote accountant E&O across carriers and match limits to your contracts.
- A direct online insurer works for smaller, lower-revenue practices that need coverage quickly.
- A specialty brokerage helps for larger firms or audit-heavy books. One AI-native option that places professional and financial services coverage is Harper.
Compare the limit, the retroactive date, and whether defense costs erode your limit, not just the price.
Frequently Asked Questions
Do accountants need professional liability insurance?
It is rarely required by law, but it is commonly required by client contracts and is standard risk management for tax, audit, and advisory work. Many firms cannot win engagements without it.
Is accountants E&O the same as professional liability?
Yes. Accountants professional liability and errors and omissions (E&O) are the same coverage against claims that your accounting work caused a client a financial loss.
Does general liability cover a tax or audit mistake?
No. General liability covers bodily injury and property damage. A financial loss from your accounting work is covered by E&O.
How much does accountant E&O cost?
It depends on firm revenue, the services you offer, your limits, and claims history. Quote your actual details to price it, since audit-heavy firms and larger books cost more than a solo bookkeeper.
Get a quote for accountant E&O
For related reading, see professional liability insurance explained and professional liability vs general liability.
