California Code, Military and Veterans Code - MVC § 405

(a) No obligation or liability bearing interest at a rate in excess of 6 percent per year incurred by a service member before that person's current period of military service shall, except as provided in subdivision (b), bear interest at a rate in excess of 6 percent per year as follows:

(b) Notwithstanding subdivision (a), if in the opinion of a court, upon application thereto by the obligee, the ability of the service member to pay interest upon an obligation or liability at a rate in excess of 6 percent per year is not materially affected by reason of that service, the court may make that order as in its opinion may be just.

(c) As used in this section, “interest” includes service charges, renewal charges, fees, or any other charges, except bona fide insurance, in respect of any obligation or liability.

(d) Interest at a rate in excess of 6 percent per year that would otherwise be incurred but for the prohibition in this section is forgiven. The amount of any periodic payment due from a service member shall be reduced by the amount of the interest forgiven under this section that is allocable to the period for which the payment is made.

(e) Any person violating this section shall be liable for actual damages, reasonable attorney's fees, and costs incurred by the injured party.