What Is Bank Reconciliation? A Plain-English Guide
Reconciliation is the act of comparing your books against your bank's records and explaining any difference. That's the entire concept. Its power is what it catches: missing transactions, duplicates, and miscategorized transfers, the three ways books drift from reality.
The arithmetic
Your book balance for an account is: opening balance + every recorded transaction since. The bank balance is what the bank says. Reconciliation asks: do they match? When they do, every report built on those transactions inherits that trustworthiness. When they don't, the difference is a to-do list.
The usual suspects when numbers disagree
- Missing transactions: a gap in imports, or a period before you started tracking (fix the opening balance once and it's solved).
- Duplicates: the same statement imported twice, or a bank feed overlapping an import. Good tools fingerprint transactions to prevent this.
- Transfers counted as activity: moving $2,000 between your own accounts isn't income or expense; unflagged, it inflates both sides.
- Timing: a check that hasn't cleared, a pending card charge. These self-resolve; note them and move on.
How often, and how automated
Monthly is the classic cadence and it's enough. With live bank feeds the comparison is continuous, your job reduces to glancing at a reconciliation view and investigating only when the difference isn't zero.
The habit matters because errors age badly. A discrepancy found in the month it happened takes minutes to resolve. The same discrepancy a year later means re-checking twelve months of activity. Five minutes a month buys you reports you never have to second-guess.