The common fund doctrine is an equitable rule that lets a court pay the lawyer who created a settlement or judgment directly out of that recovery, so every beneficiary chips in proportionally instead of letting the lead plaintiff absorb the whole legal bill. If you share in the winnings, you share in the cost of winning. In practical terms, this is why a class action settlement notice tells you the attorneys will take a percentage off the top, and it’s also why your health insurer’s subrogation claim against your personal injury settlement often gets reduced before the insurer sees a dollar.
The rule is an exception to the American rule that each side pays its own attorney fees. It rests on the equitable powers of the court, which means a judge can apply it to prevent unjust enrichment even without a statute specifically authorizing fees.
When a Court Will Apply It
Three things have to be true. If any one is missing, the fee request fails.
- There is an identifiable fund. A concrete pool of money or property the court can supervise and distribute. A vague expectation of future savings is not enough.
- There are identifiable beneficiaries who did not hire the lawyer. The doctrine targets passive beneficiaries, not clients who signed a retainer.
- There is a causal link between the lawyer’s work and the fund. The attorney’s efforts produced, preserved, or increased the value of the recovery. Money that would have arrived anyway doesn’t count.
The underlying logic is preventing a windfall: letting people collect proceeds from someone else’s legal fight without contributing to the cost of that fight.
How the Attorney’s Fee Is Calculated
Two methods dominate, and courts often run them side by side as a check on each other.
Percentage of the Fund
The most common approach awards the attorney a percentage of the total recovery. In federal courts, 25% is widely treated as the starting point. The Ninth Circuit has explicitly adopted 25% as its benchmark and expects courts to explain any significant departure.1United States Courts for the Ninth Circuit. In re Lithium Ion Batteries Antitrust Litigation
The percentage scales with the size of the recovery. Smaller settlements in the low millions often produce fee awards between 30% and 37%, reflecting the proportionally higher risk and effort. As settlements climb into the hundreds of millions, courts push the percentage down toward 10% or 12%, because even a small slice of a huge fund yields enormous fees. A judge who mechanically awarded 25% on a $500 million fund without analysis would be abusing discretion.
Courts weigh the complexity of the issues, the risk the attorney assumed by taking the case on contingency, the quality of the result relative to what the class could have expected, and whether the case was handled efficiently or dragged through unnecessary motion practice.
The Lodestar Cross-Check
The lodestar method multiplies the attorney’s reasonable hours by a reasonable hourly rate to produce a baseline figure.2U.S. Department of Labor. Determining the Reasonable Hourly Rate – Recent Decisions and Evolving Issues The court then compares that figure against the proposed percentage. If the percentage would hand the attorney five times what the lodestar suggests, the judge will want a good explanation. If the two numbers line up, the percentage looks reasonable.
Courts sometimes apply a multiplier to the lodestar to account for risk. An attorney who spent three years on a case with no guarantee of payment carried real financial exposure. A multiplier of 1.5 to 3 is typical. Anything higher draws heavy scrutiny, and padded or duplicative hours get cut.
Class Actions and Your Right to Object
Class actions are where the doctrine does most of its work. Individual claims may be worth a few hundred dollars or less. Nobody hires a lawyer to recover $47 in overcharges. Aggregate those claims across 200,000 people and the total might reach tens of millions, and the only realistic source for the attorney’s compensation is the fund itself. Without the doctrine, every class member could sit back and claim a full share while the lead plaintiff subsidized everyone else’s passivity.
Federal Rule of Civil Procedure 23(h) requires any motion for attorney fees to be served on all parties, with notice directed to class members in a reasonable manner. Class members have the right to object, and the court must make findings of fact and state its legal conclusions before approving an award.3Legal Information Institute. Federal Rules of Civil Procedure Rule 23 – Class Actions
If you think the proposed fee is too high, you can file an objection with the court. Common grounds include unreasonable hours, work duplicated across firms, or tasks that produced no actual benefit. Courts have been clear that attorneys cannot collect for work done so poorly that it is of no value to the common benefit.
One wrinkle matters: if you hired your own attorney who contributed meaningfully to the litigation, a court is unlikely to charge you a share of class counsel’s fees. The free-rider rationale doesn’t apply to someone who was actually riding alongside the lead plaintiff. Simply disagreeing with the fee without participating rarely succeeds. Read the settlement notice carefully, because the objection deadline is firm and missing it typically waives your right to challenge the fee.3Legal Information Institute. Federal Rules of Civil Procedure Rule 23 – Class Actions
Reducing Your Health Insurer’s Subrogation Claim
The doctrine shows up constantly in personal injury cases involving health insurance. A typical scenario: you’re injured by a third party, your health insurer pays $40,000 in medical bills, and your lawyer recovers $100,000 from the person who hurt you. The insurer has a subrogation right to recoup its $40,000. But your lawyer did all the work. The insurer just waited for the check.
Under the common fund doctrine, the court typically requires the insurer to pay a pro-rata share of the attorney fees before collecting its reimbursement. If the fee award was 25%, the insurer’s $40,000 claim gets reduced by roughly $10,000 to reflect its share of the litigation costs. Without that reduction, you’d bear the full weight of the fees while the insurer recovered every dollar it spent.
Courts ask whether the insurer contributed anything meaningful to the litigation. If the insurer actively participated, funding investigation or providing litigation support, the fee reduction may shrink or disappear. If the insurer simply sent a subrogation demand after the settlement landed, the doctrine applies with full force.
Why ERISA Plans Can Wipe Out This Benefit
Employer-sponsored health plans governed by ERISA are a major exception, and this is where people get blindsided. In US Airways, Inc. v. McCutchen (2013), the Supreme Court held that when an ERISA plan’s terms specifically address reimbursement, those terms override the common fund doctrine. The Court was direct: “Neither general unjust enrichment principles nor specific doctrines reflecting those principles—such as the double-recovery or common-fund rules invoked by McCutchen—can override the applicable contract.”4Justia Law. US Airways Inc v McCutchen, 569 US 88 (2013)
If your employer’s health plan says it’s entitled to full reimbursement from any third-party recovery, the plan gets full reimbursement. You can’t invoke the common fund doctrine to force it to share your attorney fees. Some federal courts have ordered employees to repay the plan’s entire medical expenditure out of their settlement, leaving the injured person and their lawyer with nothing after legal costs.
One safety valve matters. When the plan is silent on how attorney fees should be allocated, the common fund doctrine steps in as a default rule to fill the gap.4Justia Law. US Airways Inc v McCutchen, 569 US 88 (2013) Before you file a personal injury claim, read your health plan’s subrogation language. If it explicitly requires dollar-for-dollar repayment without mentioning attorney fees, the doctrine won’t rescue you. If the plan is silent on fees, your argument is much stronger.
Taxes on the Attorney’s Share
The part that catches people off guard: when you receive money from a common fund settlement, the IRS generally treats the entire amount attributable to you as gross income, including the portion that went straight to the attorney and never touched your account. The Supreme Court settled this in Commissioner v. Banks, holding that because the attorney acts as the client’s agent, the full recovery is income to the client as principal.5Justia Law. Commissioner v Banks, 543 US 426 (2005) The attorney’s share may be deductible, but it is not excludable.
The major exception is physical injury. Under IRC Section 104(a)(2), damages received on account of personal physical injuries or physical sickness are excluded from gross income entirely, attorney fee portion included.6Office of the Law Revision Counsel. 26 USC 104 – Compensation for Injuries or Sickness Emotional distress alone doesn’t qualify, though medical expenses attributable to emotional distress can be excluded.
For non-physical-injury settlements such as securities fraud, consumer protection, and antitrust class actions, the math gets painful. You report the full settlement as income, then look for deductions:
- Discrimination and whistleblower claims. IRC Section 62(a)(20) allows an above-the-line deduction for attorney fees in cases involving unlawful discrimination or whistleblower violations, capped at the amount included in gross income from the claim. This covers a wide range of employment claims, including Title VII, the ADA, ADEA, FLSA, and FMLA cases.7Office of the Law Revision Counsel. 26 USC 62 – Adjusted Gross Income Defined
- Most other claims. Attorney fees in cases outside the discrimination and whistleblower categories were historically deductible as miscellaneous itemized deductions. The Tax Cuts and Jobs Act suspended that deduction through 2025. Whether it returns in 2026 depends on congressional action. If the suspension lapses, the deduction would again be available but subject to the 2% adjusted-gross-income floor and ineligible under the alternative minimum tax, which is how the Banks plaintiffs got burned in the first place.
If your class action settlement involves a non-physical claim, talk to a tax professional before spending the money. A tax bill on phantom income you never actually received is one of the harshest surprises in litigation.