If you’ve ever asked your bookkeeper whether last month is “closed” and got a vague answer, you’re not alone. Month-end close is one of the least understood parts of bookkeeping, and one of the most important.
Why it matters
Without a consistent close, a few things tend to happen:
Last month’s numbers change after you’ve acted on them. A late bill or a re-categorized expense can quietly shift a report you already used to make a decision.
Errors pile up. A duplicate charge or missed deposit is easy to fix in the month it happens. Six months later, it’s a cleanup project.
You can’t compare months fairly. Trends only mean something if each month was finalized the same way.
Year-end gets harder. A year of unclosed months means a year’s worth of questions all landing at once.
What a good monthly close includes
The details vary by business, but a solid close usually covers these steps:
Reconcile every account. Match your books to your bank, credit card, and loan statements so nothing is missing, duplicated, or wrong.
Review uncategorized transactions. Everything gets a home, so your reports reflect reality.
Check accounts receivable. Which invoices are still open? Are any overdue, or ready to be written off?
Check accounts payable. Are all bills entered, including ones received but not yet paid?
Post adjusting entries. These cover items like prepaid expenses, depreciation, or accruals so the month reflects what actually happened, not just when cash moved.
Review the financial statements. Do the numbers make sense compared with last month and with what you know about your business?
Lock the period. Most accounting software lets you set a closing date so changes to past months require deliberate approval.
How soon should you close?
For most small businesses, aim to close within 10 business days after month-end. Faster is better, because the information is fresh and bank statements are available. If your books are regularly weeks behind, the reports you get will describe a business that no longer exists.
What if you need to change a closed month?
It happens. A bill arrives late, or an error turns up. When a closed period needs an adjustment, the change should be deliberate: someone unlocks the period, makes the correction, documents why, and locks it again. That’s far better than silent edits that nobody notices.
A simple test
Ask yourself: “If I pulled last month’s profit and loss today and again in 30 days, would it be the same?” If the answer is no, or you’re not sure, your books probably aren’t being closed consistently.
Making it a habit
A monthly close shouldn’t be a scramble. With the right process, it’s a predictable routine that takes a bookkeeper a few hours and gives you reports you can rely on.
At Olbrych Accounting, a clean monthly close is part of how we help Palm Beach County businesses stay clear on where they stand. If you’d like to talk about what that would look like for your business, we’d be glad to start a conversation.