The FHA-HAMP program combines a partial claim with a loan modification to help struggling homeowners in default. It allows for up to 30% of the unpaid principal balance to go towards arrearages and fees, with the remainder deferred until payoff. Homeowners must complete a 3 month trial plan first. The modified loan amount is calculated to keep the front-end ratio below 31% and back-end ratio below 55% of gross monthly income. If successful, the partial claim is subordinated to the modified loan and documents are sent to HUD for processing.