Glossary · Bookkeeping & QuickBooks term
Opening balance
The balance of an account at the moment it’s first entered into the books — or at the start of a new period. Everything that follows is built on it, so if it’s wrong, everything after inherits the error.
In plain terms
What opening balance means.
An opening balance is the starting balance of an account at the point it is first set up in the books, or carried into the start of a new accounting period. When you add a bank account, a loan, or a credit card to QuickBooks, its opening balance is what was in it on the start date.
Opening balances are the foundation the rest of the ledger is built on: every subsequent transaction adjusts the balance up or down from that starting point.
Wrong opening balances break the whole file.
Because everything builds on them, an incorrect opening balance throws off every period that follows — the account never reconciles, and the error is easy to miss because the day-to-day transactions all look fine. It is one of the most common reasons balances come out wrong after a QuickBooks migration and a frequent cleanup finding.
Getting opening balances right — entered against a real, reconciled starting point — is foundational work in any setup or migration; skipping it is what turns a quick conversion into months of unexplained discrepancies.
Put it to work
An account that never reconciles?
A Certified ProAdvisor checks whether the opening balance is the culprit and corrects it against your real starting point — written fixed-fee scope.