A loan of money is a contract by which a person delivers a sum of money to another person and the other person agrees to return at a future time a sum equivalent to that which the other person borrowed. A loan for mere use is governed by the law on loan for use.
Loan Of Money -- What Constitutes
Mont. Code Ann. § 31-1-101, under Loans of Money -- Interest Rates.
Mont. Code Ann. § 31-1-101