The way it works is simple.
Bonuses, whether signing or restructure, are still paid in the current year but are allocated across the seasons remaining on the deal. For Dak Prescott he had four years remaining on his deal; 2023 and 2024 are real years but he also has 2025 and 2026 years on the contract where he isn’t actually under contract.
Those are fake years that are in the deal, but void out before they take place. They literally exist for the sole purpose of being able to place some of the cap hit from the deal in years the player is no longer under contract.
Before the conversions, Prescott was set to make $31 million in base salary with another $18.1 million in cap hits from his original bonus and a 2022 restructure.
His base salary was lowered, which lowers his cap hit this year but increases it in 2024, 2025 and 2026.
Dallas turned $29 million of Prescott’s $31 million salary into a bonus, leaving around $2 million of base salary. That bonus is split across the four seasons at $7.25 million each.
So instead of $31 million plus the $18.1 million for a total cap his of $49.1 million, Prescott’s hit is now for $2 million, $7.25 million plus the $18.1 million for a new cap hit of $27.35 million.
That $21.75 million of savings only exists on the cap; Dallas is still paying Prescott $31 million in cash for the 2023 season.
https://cowboyswire.usatoday.com/lists/cowboys-prescott-martin-restructure-2023/