DC itself: no cap
For a personal injury claim against a private party, DC imposes no statutory cap on the contingency fee percentage — the rate is set by private agreement, subject to a general reasonableness standard under Rule of Professional Conduct 1.5.
Why DC is a special case nationally
Most states' fee-cap discussions focus on whether that state itself caps fees. DC is genuinely different: because of its unique concentration of federal buildings, agencies, and employees, an unusually large share of personal injury claims filed here are actually claims against the United States government — and those claims are governed by a real federal cap regardless of DC's own permissive local rule.
The Federal Tort Claims Act's cap, compared to a state cap like Michigan's
Michigan applies a flat 33.33% cap to every personal injury case filed there, regardless of defendant. The Federal Tort Claims Act's cap works differently: it's narrower in scope, applying only to claims against the federal government specifically, but it reaches nationwide wherever such a claim is filed — it's simply encountered more often in DC than almost anywhere else.
A cap with real teeth
Unlike a reasonableness standard that leaves room for case-by-case judgment, the FTCA's 20%/25% limits are fixed by federal statute, with potential fines for an attorney who exceeds them. There's no waiver mechanism for an unusually complex federal claim, the way some state sliding scales allow.