The risk was in how Hanks got paid

Rather than rely entirely on a large guaranteed paycheck, Tom Hanks accepted compensation tied to Forrest Gump’s financial performance. That meant taking a chance on the film itself: if audiences stayed away, his earnings could have been far smaller than they would have been under a conventional upfront salary.

This kind of arrangement is often called backend participation. In plain terms, an actor trades some certainty now for a share of money the movie generates later. The exact value depends on the contract—especially what counts as revenue and which expenses are deducted—so a share of a hit’s proceeds is not automatically a share of every dollar at the box office.

A hit turned uncertainty into a windfall

Forrest Gump became a major commercial success, making the performance-based deal extraordinarily valuable. The much-discussed $65 million payday reflects the upside of that bet: Hanks’s compensation rose with the film’s success instead of stopping at a fixed fee.

The gamble was not that he personally financed the movie. It was that he accepted more uncertainty about his own pay. Had the film underperformed, the studio would still have borne the production costs, while Hanks would have had less guaranteed compensation. Its success made the tradeoff look spectacularly favorable.