25 CFR § 141.49
Usury prohibited
February 24, 2021
No reservation business may take or receive money, goods, or other things of value for a loan or forbearance on a debt that exceeds in value the principal plus twenty-four percent (24 percent) per annum finance charge. Any reservation business contracting for, reserving, or receiving directly or indirectly, any greater amount shall forfeit the finance charge.