A mismatch between QuickBooks and your bank statement usually comes down to one of a few common issues. The good news is most are fixable once you know where to look.

Start with timing differences. Your bank statement shows transactions that cleared by a specific date, but QuickBooks might have transactions recorded on different dates. A check you wrote on the 28th might not clear until the 3rd of the next month. If you’re comparing end-of-month balances, they won’t line up until those pending items clear. The reconciliation process in QuickBooks handles this by letting you mark which transactions have actually cleared versus which are still outstanding.

Duplicate transactions cause problems more often than people realize. If you have bank feeds connected and also enter transactions manually, you can end up with the same expense recorded twice. QuickBooks tries to match these automatically, but it misses some. Look for transactions with identical amounts on similar dates and delete the duplicates.

Deleted or edited transactions after reconciliation will throw off your balance. Once you’ve reconciled a period, those transactions should stay locked. If someone changes a reconciled transaction, your previous reconciliation becomes invalid and every month after will be off. QuickBooks has a setting to warn you before editing reconciled transactions. Turn it on if it’s not already.

Opening balance errors happen when QuickBooks wasn’t set up correctly from the start. If the starting balance in QuickBooks doesn’t match your actual bank balance on that date, every reconciliation after will be off by that same amount. This is especially common when people connect bank feeds without establishing the correct opening balance first. Proper QuickBooks setup prevents this problem entirely.

Uncategorized transactions in your bank feed can cause confusion too. Transactions downloaded from the bank but not yet accepted into your register sit in a holding area. They’re technically in QuickBooks but not in your actual accounts yet. Make sure you’ve accepted all pending transactions before trying to reconcile.

To find the discrepancy, run the reconciliation detail report for the last period that balanced correctly. Compare it line by line with your bank statement. The difference between your QuickBooks balance and your bank balance often points directly to a specific transaction or group of transactions.

If you’ve fallen behind on reconciliations, the errors compound. One mistake in March makes every month after that look wrong. Regular monthly reconciliation as part of solid business bookkeeping catches problems while they’re small and easy to trace.

When you can’t find the issue after a reasonable search, getting help is usually faster than continuing to dig. A bookkeeper experienced with QuickBooks can often spot problems in minutes that might take you hours to find. If your books have accumulated months of unreconciled transactions or unknown discrepancies, getting everything cleaned up and current lets you start fresh with a balance that actually matches.