How Often Should You Reconcile Your Business Bank Account?
Reconciling means matching every transaction in your books to your bank statement so the ending balance ties. It sounds boring. It's actually the single most important control a small business has — and skipping it is how books drift from reality.
Monthly is the standard
For 99% of Montana small businesses, monthly reconciliation of every bank account, credit card, loan, and merchant account is the right cadence. That's what tax preparers, auditors, and lenders expect.
Monthly gives you a P&L and balance sheet you can actually trust for the prior month, and it keeps errors small enough to fix quickly.
When weekly makes sense
High-transaction-volume businesses (restaurants, e-commerce, contractors with lots of card activity) benefit from weekly reconciliation. It keeps categorization current and catches fraud within days instead of weeks.
If you use QuickBooks Online or Xero with bank feeds, weekly is more about categorizing new transactions than a formal reconciliation. The formal reconciliation still happens at month-end.
Quarterly or annually is a red flag
If you're only reconciling at year-end for your tax return, you're not really running a business — you're running a shoebox. Errors compound, duplicate transactions hide, and fraud goes undetected for months.
Cleanup fees to fix a year of unreconciled books typically run $1,500–$6,500 in Montana. Monthly reconciliation would have cost less than the cleanup.
What reconciliation actually catches
Duplicate transactions from bank feeds. Missing income deposits. Personal charges accidentally recorded as business. Bank errors (yes, they happen). Fraudulent card charges before the dispute window closes. Loan interest posted to principal by mistake.
None of this shows up until you tie your books to the statement.
A quick disclaimer
This article is general information for Montana small business owners, not tax, legal, or accounting advice for your specific situation. Rules change, and how they apply depends on facts we don't know about you. Before acting on anything you read here, talk to a qualified professional. If you're a Montana business owner and want a real conversation about your books, payroll, or tax, that's what Marlow Accounting is here for — call 406-290-1214 or schedule a discovery call.