Monthly at minimum. For most small businesses, reconciling bank accounts once a month catches errors and discrepancies before they become bigger problems. Depending on your transaction volume and business type, weekly or even daily reconciliation might make more sense.

Monthly reconciliation works for businesses with straightforward finances and moderate transaction volume. You’re matching your bank statement to your accounting records, catching transactions you missed, identifying bank fees you forgot to record, and spotting errors or unauthorized charges. Doing this within the first week after your statement closes keeps everything fresh.

High-volume businesses should reconcile weekly. If you’re processing dozens of transactions per day, waiting a full month means hunting through hundreds of line items when something doesn’t match. Medical practices with high patient volume, retailers, and restaurants fall into this category. Weekly reconciliation turns a potentially frustrating task into a manageable 15-minute review.

Construction businesses and contractors with project-based billing should also reconcile weekly at minimum. When you’re tracking costs across multiple jobs, an unrecorded expense or misapplied payment throws off your job costing. You think a project is profitable when it’s actually underwater because a material payment never got categorized correctly.

Payroll is another area where timely reconciliation matters. If a direct deposit fails or a payroll tax payment doesn’t clear, monthly reconciliation surfaces the problem before penalties accumulate. Working with a Detroit payroll service that also handles your books means these issues get caught and addressed quickly.

What happens when you don’t reconcile regularly? Bank errors go unnoticed. The $500 charge that wasn’t yours sits there for months until it’s too late to dispute. Fraud gets caught late. An employee skimming small amounts doesn’t get spotted because no one is comparing what the bank shows to what should be there. Your books slowly diverge from reality. By year end, your accountant is trying to figure out a $3,000 discrepancy that could have been caught in January if someone had just looked.

The worst outcome is not knowing your real cash position. You think you have $15,000 available when you actually have $12,000 because three checks haven’t cleared and a deposit you recorded didn’t actually go through. This leads to bounced payments, overdraft fees, and uncomfortable vendor conversations.

If you’re handling your own books, set a recurring calendar reminder for the first Monday of each month to reconcile the prior month. If you outsource your bookkeeping, monthly reconciliation should be a non-negotiable part of what your bookkeeper delivers every single month. Skipped months aren’t acceptable.