Simple interest is interest that is calculated on an original sum of money and not also on interest which has previously been added to the sum. Compare compound interest.
[business]
simple interest in British English
noun
interest calculated or paid on the principal alone
Compare compound interest
simple interest in American English
interest computed on principal alone, and not on principal plus interest
see also compound interest
Examples of 'simple interest' in a sentence
simple interest
Hugely relieved, she fought to hide the fact, schooling her features to simple interest.