Increased principal.
CFR · 2024-01-01 · US · Title 7
A borrower can meet the premium requirements by increasing the outstanding principal balance of the loan advance that is being refinanced. If it does so the borrower shall make a payment at the time of the refinancing equal to 2.5 percent of the amount of the premium that is added to the outstanding principal balance of the loan.
official document · source cfr-2024 · id 7:§ 1786.208