N.H. Rev. Stat. Ann. § 358-K:4-a

Any provision of this chapter to the contrary notwithstanding, interest on any closed-end consumer credit transaction may be collected in advance for origination fees at the inception of such transaction or for a fractional part of a month (less than 30 days) from the inception of such consumer credit transaction to a monthly payment date that the creditor commonly uses in such transactions, or that the creditor considers to be more convenient administratively as a monthly payment date than the transaction inception date, such as the first day of the month.