What Are California’s Rules on Paying Witnesses?
Money changes hands around litigation constantly — reimbursed travel, expert fees, lost-wage compensation. California’s rule on paying witnesses, like the ABA Model Rule it closely mirrors, draws a hard line between compensating a witness for the burden of testifying and paying for the content of that testimony.
Get this wrong on the California Bar Exam and you’ll misdiagnose a witness-tampering fact pattern as a harmless reimbursement, or vice versa. The rule is short, but the line it draws is exactly the kind of “spot the number” issue examiners love.
The Core Rule: Rule 3.4(b), Same in California and the ABA
Rule 3.4 is one of the areas where California’s Rule of Professional Conduct, effective November 1, 2018, tracks the ABA Model Rule almost word for word — a useful fact on an exam where so many other CRPC provisions diverge from their ABA counterparts. Whether the question is framed for the MPRE or a California essay, the same three categories apply.
Category 1 — Fact Witnesses
A lawyer may pay a fact witness:
- Reasonable expenses actually incurred attending or testifying (travel, lodging, meals); and
- Reasonable compensation for lost time — reimbursing an hourly employee or self-employed witness for income lost while away from work.
A lawyer may not pay a fact witness to induce or shape specific testimony — that’s falsifying evidence, not reimbursement.
Category 2 — Expert Witnesses
Experts may be paid a reasonable, non-contingent professional fee for time spent reviewing materials, preparing, sitting for deposition, and testifying — an ordinary professional rate, not a bounty for a favorable opinion.
Category 3 — The Absolute Bar: Contingent Compensation
No witness, fact or expert, may ever be paid a fee contingent on favorable testimony or on the outcome of the case. This bar is categorical — it doesn’t matter whether the payment is framed as a bonus, a gift for cooperation, or a “success fee.”
Quick-Reference Table
| Payment type | Permitted? | Condition |
|---|---|---|
| Fact witness — reasonable expenses (travel, lodging, meals) | Yes | Must reflect actual costs incurred |
| Fact witness — lost-time compensation | Yes | Must reflect actual lost income, not a premium |
| Expert witness — professional fee | Yes | Must be a reasonable, non-contingent rate |
| Any witness — fee contingent on outcome or favorable content | No | Absolute bar, both ABA and California |
| Any witness — “thank-you” gift after favorable testimony | No | Improper even if never promised in advance |
Worked Example: Lost-Time Compensation Done Right
A self-employed consultant will lose two full billing days sitting for deposition and trial. The lawyer who subpoenaed her pays $1,500 — calculated at her ordinary day rate — plus a hotel and mileage reimbursement. That’s permissible: the amount tracks her actual economic loss, not a premium designed to shape her testimony.
Change the number to $10,000 for the same two days, and the size of the payment alone starts to look like disguised inducement rather than legitimate lost-time compensation — even without an explicit “if you testify this way” condition attached.
Worked Example: The Contingent-Fee Trap
A plaintiff’s lawyer tells an eyewitness, “I’ll pay you $5,000 if our client wins this case.” That’s a Rule 3.4 violation on its face — the payment is contingent on the case’s outcome. It makes no difference that the witness might have testified truthfully anyway, or that the money was promised rather than paid upfront. Contingency alone is disqualifying.
Instructing Witnesses to Stay Silent
A related trap on the same rule: a lawyer generally may not instruct a witness to withhold information or avoid the other side. The narrow exception applies only when the witness is a relative, employee, or agent of the lawyer’s own client, and the lawyer reasonably believes the refusal won’t harm the witness’s own interests.
A prosecutor who tells an independent, non-client witness — say, a defendant’s housekeeper with exculpatory information — to avoid defense counsel violates this rule. She isn’t the prosecution’s employee or agent, and steering her away from the defense both obstructs discovery of the truth and can independently harm her own interests in cooperating.
Common Mistakes on the Bar Exam
- Paying a fact witness a fee contingent on favorable testimony or the case’s outcome.
- Paying an “expert” at an inflated rate that signals payment for opinion, not professional time.
- Instructing a non-client, independent witness to avoid opposing counsel.
- Treating a post-testimony “thank-you” gift as harmless because it was never promised in advance.
- Assuming any expense a witness might want — luxury hotels, entertainment — qualifies as “reasonable.”
FAQ
Can a lawyer pay an expert witness more than a fact witness?
Yes, but only because experts are compensated for professional time and expertise at a reasonable market rate — not because experts can be paid a premium tied to a favorable opinion. Both fact and expert witnesses are barred from contingent compensation.
Is a “thank-you” gift after favorable testimony allowed?
No. A gift given to reward testimony already provided is improper under Rule 3.4, even if it was never promised in advance and is styled as gratitude rather than inducement.
Does California follow the ABA’s rule on witness payments?
Yes. California’s Rule 3.4, effective November 1, 2018, tracks ABA Model Rule 3.4(b) closely on witness compensation — one of the areas where California Bar Exam candidates can rely on the same analysis used for the MPRE.
Key Takeaways
- Fact witnesses may receive reasonable expenses and lost-time compensation; experts may receive a reasonable professional fee.
- No witness’s compensation may ever be contingent on favorable testimony or case outcome — an absolute bar under both California and ABA rules.
- Post-testimony “thank-you” gifts are improper even without a prior promise.
- Lawyers may not instruct independent, non-client witnesses to avoid the other side.
- California’s Rule 3.4, effective November 1, 2018, is one of the rare CRPC provisions that closely mirrors its ABA counterpart — a useful shortcut on the exam.
This article is educational and is not legal advice. Consult a licensed California attorney about your situation.
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