Back payments refer to payments that should have been made earlier but were not. There are various synonyms for the term 'back payments,' including overdue payments, arrears, backlog payments, owed payments, and delinquent payments. These synonyms convey the same meaning of payments that are past due and are yet to be made. Back payments can be a result of an oversight, financial challenges, or simply choosing to delay the payment. Regardless of the reason, back payments can accumulate interest over time, making them more challenging to settle. It's therefore important to ensure that payments are made on time to avoid accruing back payments or arrears.