North Dakota late fee and interest rules for invoices

Here is what North Dakota law says about late fees and interest on unpaid invoices, for business clients and consumers, with the statute and a link to the official source.

This is general information, not legal advice. Laws change and can apply differently to your situation, so check your state's current law or ask a lawyer before you charge a late fee, interest or a deposit. Last reviewed October 21, 2026.

North Dakota late fee and interest limits

Rule	North Dakota
Business-to-business late fee or interest cap	Corporations, LLCs, partnerships and trusts are exempt from the state cap, and amounts over $35,000 have none. Otherwise the cap is 5.5 points above the 6-month Treasury bill rate, never below 7%.
Consumer cap	On installment sales, a late charge of 10% of the payment or $10, whichever is less, is allowed once a payment is 10 days late, once per payment.
Legal interest rate when no rate was agreed	6% a year. Judgments carry 10% for 2026.
Statute	N.D.C.C. §§ 47-14-05, 47-14-09, 47-14-10, 28-20-34, 51-13-02
Last reviewed	October 21, 2026

Late fee wording to copy

Agree on the fee before the work starts and show it on every invoice.

Payment is due within 30 days of the invoice date. Balances unpaid after the due date are charged interest of [rate]% per month.
A late fee of $[amount] applies to any balance not paid by the due date.
Past due balances accrue interest at [rate]% per year, or the highest rate allowed by law, whichever is lower.

Keep going

Late fee calculatorWork out the fee or interest on an overdue invoice.How to charge late feesHow to set a late fee and put it on your invoices.Late fee laws by stateEvery state in one table.