Prejudgment interest is one of the most consistently underutilized recovery levers in plaintiff personal injury practice. When a defendant rejects a settlement demand and the plaintiff later recovers more at trial, several states allow the plaintiff to recover interest on the verdict from the date of the rejected offer. In California, a two-to-three-year litigation timeline converts a $1.5 million verdict into a recovery that includes $225,000 to $337,500 in pre-verdict interest at the statutory 10 percent annual rate, on top of post-judgment interest and any fee-shifting. The statute does not require proof of bad faith. It requires only a properly framed settlement demand and a better-than-offered verdict.
California CCP 3291: The Core Statute
California Code of Civil Procedure Section 3291 provides that in an action for personal injury, if the plaintiff makes an offer to settle that is not accepted and the plaintiff recovers a verdict greater than the offer, the court shall award interest on the judgment at the legal rate of 10 percent per year, calculated from the date of the offer. The statute is mandatory when the prerequisites are met: there is no judicial discretion to deny the interest award to a prevailing plaintiff who satisfied the technical requirements.
Section 3291 interest is in addition to CCP 998 costs and expert fees, not a substitute for them. A plaintiff who makes both a valid CCP 998 offer and a valid CCP 3291 demand before trial, and then beats both thresholds at verdict, recovers 998 expert fee shifting and 3291 prejudgment interest simultaneously. The two statutes operate on different triggers and different calculations, but they are commonly invoked together in the same post-trial motion.
Requirements for a Valid CCP 3291 Demand
The offer must be in writing, served on the defendant. It must be a genuine offer to settle the entire action, not merely a demand for a particular element of damages. Courts have held that a demand letter from plaintiff's counsel expressly offering to settle the entire claim for a specified sum, if not withdrawn before trial, qualifies as the triggering offer. The offer should identify it as a CCP 3291 settlement demand to put the defendant on notice that the interest clock starts running on the date of service.
The offer amount does not have to track a particular methodology, but a demand that is unreasonably inflated relative to the liability and damages evidence may invite a defense argument that the offer was not a genuine settlement offer. A reasonable practice is to make the 3291 demand at a figure that is supportable by the evidence in hand at the time of the offer but below the expected trial recovery, creating a genuine incentive for the defendant to accept while preserving the interest accrual position.
What the Interest Is Computed On
Section 3291 interest runs on the full judgment amount, including non-economic damages. California courts have confirmed that the prejudgment interest is not limited to economic damages, distinguishing CCP 3291 from some other prejudgment interest statutes that cap interest on liquidated or economic losses only. The full compensatory verdict, including pain and suffering, forms the principal on which the 10 percent annual rate runs from the date of the qualifying offer.
If the verdict is reduced by post-trial motions (remittitur, comparative fault adjustments, or grant of a new trial on damages), the interest calculation is applied to the final judgment amount after reduction. A verdict that is substantially remitted does not retroactively void the interest accrual; it reduces the principal on which that accrual is calculated going forward.
Offer Timing Strategy
The earlier the qualifying offer is made, the more interest accrues if the case goes to verdict. A CCP 3291 demand served on the day the complaint is filed begins the interest clock at the outset of the litigation. If the case takes 30 months from filing to verdict, that single structural decision adds 25 percent of the verdict to the recovery before a single trial day begins.
The countervailing consideration: an early, case-initiating demand signals willingness to settle at a price the defendant knows is below the full value you anticipate at trial. Strategic timing depends on several factors:
- Whether the liability evidence is strong enough at the time of the demand to make the amount credible and pressure the defendant into considering settlement
- Whether early demand disclosure of your damages theory gives the defense time to develop a rebuttal that weakens the eventual verdict
- Whether the defendant is a repeat player who will carry the file toward trial regardless of the offer, in which case early demand simply maximizes interest accrual without settlement risk
- Whether policy limits constrain the recovery such that the prejudgment interest will not be collectible even if awarded
Interaction with CCP 998 Offers
A CCP 998 offer triggers cost-shifting (including expert witness fees) when the offeree fails to obtain a result more favorable than the offer. The 998 and the 3291 demands are typically made together in the same document or in a coordinated series. The technical requirements of each statute are distinct: a 998 offer must comply with the procedural requirements of that section (including the written form, service method, and the offer's specificity), while the 3291 demand is a settlement offer that does not need to satisfy the 998 format. Some practitioners serve them as separate documents on the same day to ensure each is independently valid under its own statute's requirements.
For a defendant who is judgment-proof or insured for a fixed limit, the practical value of CCP 3291 interest is limited to what the defendant can pay. A $1.5 million verdict against a defendant with a $500,000 policy and no personal assets produces $50,000 in prejudgment interest on the collectible portion, not $150,000 on the full verdict. The interest computation exercise is still worth conducting because some defendants have umbrella coverage or personal assets that exceed the primary policy.
Other Jurisdictions: A Comparative Note
Florida's offer-of-judgment statute (Section 768.79) similarly awards attorney's fees and costs when the defendant rejects a plaintiff's offer and the plaintiff recovers more than 25 percent above the rejected offer at trial. New York CPLR 5001 through 5004 permit prejudgment interest in tort cases as a matter of right, running from the date of the liability finding or the accrual date depending on the nature of the damages. Texas generally does not award prejudgment interest in wrongful death and personal injury cases but permits it in contract claims. Identify the applicable statute at the outset of the case and build the offer strategy around its specific triggers.
For the full settlement accounting framework, including lien resolution sequencing and disbursement timing that interacts with prejudgment interest awards, see liens and settlement practice coverage. For verdict benchmarks and how courts have handled post-trial motions in cases with large prejudgment interest awards, see case law and settlements database coverage. The strategic decision of when to make the 3291 demand in relation to discovery and expert retention is addressed in the case development workflow in practice operations.