Home > Personal > Personal Lending > Mortgage > Mortgage Resources > Glossary > Compound Interest Compound Interest November 9, 2021 Interest paid on the original principal balance, and on the accumulated and unpaid interest.You Might Also Like: Living QuartersFirst-Time Homebuyer’s Playbook: 4 Steps to a Successful Offer Everyday MoneyBank Holidays: Understanding Their Impact on Deposits and Transactions Living QuartersMortgage Lending for Veterans at Bank Five Nine All Things CommunityReviewing Random Acts of Kindness 2023 Everyday MoneyWhat are ACH Payments and How Do They Work?