Any interest which remains unpaid at the end of any forty-five-day period or which remains unpaid at the end of any specified period provided by contract must be added to the principal amount of the debt and must thereafter accumulate interest.
N.D. Cent. Code § 13-01.1-03
Interest must compound
Official source: North Dakota Legislative Branch. Reproduced from public-domain North Dakota statutes; confirm against the official source for the current text. Not legal advice.