The sunk cost fallacy occurs when a party's decision to keep litigating is driven by the fees and time already invested in the case rather than by a clear-eyed assessment of the expected value of continuing from the present moment forward. Past costs are, by definition, unrecoverable regardless of what happens next, so a rational forward-looking decision should weigh only future costs and expected outcomes, not what has already been spent.

This bias is a well-documented pattern in litigation, where clients and even counsel resist a rational settlement because accepting a deal feels like admitting the money already spent was wasted, even when the objectively correct forward-looking decision is clearly to settle. The emotional weight of sunk costs can push a party toward a worse expected outcome than a dispassionate recalculation at the current decision point would recommend.

Juricratic's expected-value engine deliberately excludes historical litigation spend from its forward-looking settlement recommendation, computing expected value only from the present decision point onward, which gives a user a clean, bias-resistant comparison between settling now and continuing to litigate, independent of how much has already been spent to reach this point.

Litigation counsel use the sunk cost concept to reframe a client's settlement decision around forward-looking expected value rather than past spend, explicitly separating the emotional pull of prior investment from the objective question of whether continuing to litigate is still the best available option today.