Citizens' Nat. Bank of Kansas City v. Donnell

Background

A national bank sued to collect on a series of promissory notes and overdrafts involving a Missouri customer. The bank had accepted and rolled several notes together, included semi‑annual interest that was later compounded, and charged monthly overdraft fees of about one percent. Missouri law allowed written agreements for up to eight percent interest and barred compounding interest more often than once a year. Federal law lets a national bank charge the state rate but says knowingly taking more than allowed forfeits all interest.

Reasoning

The main question was whether compounding interest more often than once a year and the overdraft charges made the bank’s total interest exceed what Missouri law and the federal rule allow. The Court agreed with the Missouri Supreme Court that compounding effectively increases the rate of interest and that the bank’s practices violated the state rule. The Court rejected the bank’s arguments that compounding did not count as increasing the interest rate and that small overdraft charges were merely penalties or too trivial to matter. The Court also held the bank could not avoid forfeiture by later offering to remit the excessive interest.

Real world impact

The decision means banks must follow state limits on interest and on how often interest may be compounded. If a bank knowingly charges more than allowed, it risks forfeiting all interest on the debt. Lenders should carefully structure written agreements to comply with both state law and the federal rule to avoid total forfeiture.