Your books say what should have happened to your money; the bank statement says what did. Reconciliation lines the two up, ticks off the matches, and forces an explanation for everything left over — payments in transit, bank fees not yet recorded, duplicates, typos, or transactions you simply forgot.
Legitimate timing differences (a cheque not yet cleared) are noted and roll forward; genuine errors get correcting entries. The reconciliation is done when every difference has a name.
Why It Matters
Reconciliation is where bookkeeping errors go to be caught. Skip it and the books drift from reality a little each month — quietly, cumulatively, until the drift is expensive to unwind. Done monthly, it also confirms which invoice payments have actually landed, which makes it the natural moment to update your unpaid-invoice list and spot the client whose "payment sent" never arrived.
Example
The books show $12,300; the bank shows $12,180. Reconciliation finds a $95 software charge never recorded and a $25 bank fee — both entered — and a $50 client transfer recorded twice, corrected. Books now read $12,180. Match.
Frequently Asked Questions
How often should I reconcile?
Monthly at minimum, aligned to the bank statement cycle. High-volume businesses reconcile weekly or continuously via bank feeds — the shorter the gap, the easier each error is to find.