Monthly is the standard for most businesses that have reached the point of needing controller oversight. A monthly review gives you enough frequency to catch problems early without creating unnecessary overhead. Quarterly reviews leave too much time for errors to compound. Weekly reviews are overkill unless you’re in a crisis or preparing for a major transaction.

What happens in a monthly controller review matters more than the frequency itself. A proper review includes reconciling all bank and credit card accounts, reviewing the balance sheet for accuracy, posting adjusting entries like accruals and prepaids, and making sure the income statement reflects actual performance for the period. The goal is financial statements you can trust and act on.

If you have internal bookkeeping staff handling day-to-day transactions, the controller review serves as a quality check on their work. Bookkeepers process transactions. Controllers verify that everything ties out, fix what doesn’t, and ensure the financials tell an accurate story. Without that oversight layer, small errors become big problems over time. A miscategorized expense here, a missed reconciliation there, and suddenly your books don’t match reality.

The complexity of your business affects how intensive each monthly review needs to be. A professional services firm with straightforward revenue recognition and few inventory concerns has a simpler close than a construction company tracking job costs across multiple projects. Both need monthly review, but the scope differs.

Some situations call for more frequent check-ins. Rapid growth, cash flow constraints, preparation for a sale or audit, or a recent transition in bookkeeping staff all warrant closer attention. During these periods, a controller might review certain items weekly while maintaining the full monthly close process.

The real cost of infrequent review isn’t the errors themselves. It’s making decisions based on bad information. If your financials are three months behind or riddled with unreconciled items, you don’t actually know your margins, your cash position, or whether that new hire makes financial sense. Monthly controller oversight keeps your numbers current enough to be useful.

If you’re currently getting by with quarterly or annual cleanups, consider what that’s costing you in decision quality. Most business owners who move to monthly review wonder why they waited so long.