An opening balance is the starting amount for an account at a defined date or reporting period. It should connect to the accepted prior position or supported initial records. A wrong starting point can make current-period reconciliation misleading even when the latest transactions were entered correctly.
Get help with your monthly booksPractical records guidance · Updated October 8, 2026 · Fictional examples
Identify the last completed period and authoritative file. An initial bank balance is one part of the financial position; the full opening ledger may also include customer, supplier, loan and owner balances. The appropriate counterpart entries require accounting review.
Deleted, edited or newly imported historical transactions can change the starting position. Compare prior reports and reconciliation history before inserting a new adjustment. Completing another month on top of an unexplained opening difference can spread the problem.
Illustrative example · Fictional data
Illustrative example: the accepted June bank close is $4,000, but July opens at $4,250 in the file. The unexplained $250 starting difference exists before July’s activity is reviewed. Check June changes and source evidence rather than categorizing the difference as July income.
Not without reconstructing the relevant date and movements. An opening balance must correspond to its stated starting point.
No. Unsupported opening information can carry the same uncertainty into a new system.
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