A comparison of the claims where a one-third contingency fee costs more than it returns, and the signals that say the opposite.

The decision usually comes down to arithmetic that anyone can do at a kitchen table. A contingency fee of a third, plus case costs deducted separately, means a represented claim has to settle for meaningfully more than an unrepresented one just to break even. On a claim worth a few thousand dollars, that gap is hard to open. On a claim involving a spinal fusion and a disputed police report, it opens almost immediately. The useful question is not whether attorneys add value, because they often do, but whether they can add more than they cost in your particular set of facts.
A short, clean claim has a recognizable shape: a rear-end collision or a fall on a surface the owner already admitted was wet, liability the adjuster does not contest in writing, treatment that started within days and ended within weeks, and a bill stack you could read aloud in two minutes. Property damage is handled on a separate track and settled from an appraisal, so it rarely needs anyone's advocacy. When the medical file closes and stays closed, the range of plausible outcomes is narrow, and a narrow range is exactly the condition under which paying a third buys very little movement.
The other version of the same situation is a policy that caps everything. If the at-fault driver carries the state minimum and has no assets worth chasing, the ceiling is set before anyone negotiates. An attorney working that file skillfully still arrives at the same number, minus the fee. Careful readers ask the adjuster for the limits early, in writing, and many carriers will disclose them once a claim is opened, either because state law requires it or because there is no advantage in hiding a number that will surface anyway.
Start with the medical records rather than the memory of the injury, because the records are what the adjuster will read. Check whether treatment was continuous or had gaps, whether any provider used the word permanent, and whether an imaging study found something structural rather than something soft. Then check who is owed money out of the settlement: a health insurer with subrogation rights, a hospital lien filed in the county, a Medicare or Medicaid interest that has to be resolved before disbursement. Those obligations do not disappear in a self-handled claim, and they change the net figure more than most people expect.
Check the calendar next. Every state sets a statute of limitations for personal injury, commonly measured in a small number of years from the date of the incident, and shorter notice deadlines apply when a city, county, or state agency is involved. A claim that is comfortably inside that window can be negotiated slowly. A claim approaching it cannot, and the loss of leverage from a looming deadline is worth more than the fee you saved. The Centers for Disease Control and Prevention tracks injury nationally, which is a reminder that the common cases are common for a reason: most of them resolve without anyone filing anything.
Some facts argue for representation almost on their own. Comparative fault raised by the carrier, meaning the adjuster is assigning you a percentage of the blame, is one, because that percentage comes straight off the top. A commercial defendant with a claims department and outside counsel is another. So is any injury still generating treatment after several months, any surgery, any recommendation of future care, and any claim where lost income runs beyond a few weeks and would need documentation from an employer and a tax return to prove.
Two more deserve attention. If more than one policy might respond, your own underinsured motorist coverage stacked on the other driver's liability coverage, the coordination is genuinely technical and mistakes there are permanent. And if the first offer arrives before you have finished treating, that is a signal in itself: the carrier is pricing a file it understands better than you do. Attorneys who take these cases on contingency are, in effect, screening them for you, and a firm declining a case is information worth having for free.
Self-handling costs time, several phone calls, a demand letter you write yourself, and the discipline to keep every bill and record in one place. Representation costs a percentage and buys negotiation, lien reduction, and the credible possibility of a lawsuit. The line between them moves with the size of the claim and the certainty of the facts, and most people can locate it by writing down the medical total, the liability picture, and the policy limits on a single sheet of paper and looking at what is actually there.
Records retrieval, filing fees, and expert charges are usually deducted from the settlement in addition to the percentage. Ask whether they come off before or after the fee is calculated.