Five signs your books are actually closed

"Are my books closed for September?" Ask ten owners and most will say yes. Ask them how they know, and the answers get vague: the bookkeeper sent the reports, the software shows a P&L, nothing looks obviously wrong.

A report existing is not the same as a month being closed. A closed month is one where every number has been checked against something outside the books, and someone can explain what moved. Until then, the P&L is a draft, and decisions made on a draft are guesses.

Here are five signs that tell the two apart. You don't need an accounting degree to check them. You need your accounting software, your bank statements and about 20 minutes.

1. Every bank and card account reconciles to the statement, to the cent

Reconciling means matching every transaction in your books to your bank or card statement, and confirming that the ending balance in the books equals the ending balance on the statement. Not "close enough". Not "off by $42, probably a fee". The same number.

It matters because cash is the one figure you can verify with a document you didn't create. If the cash in your books doesn't match the bank, something is missing, duplicated or in the wrong month, and that error flows straight into your revenue or expenses.

How to check: in QuickBooks Online or Xero, open the reconciliation report for each bank and card account. Each one should show a completed reconciliation for the last day of the month, with a difference of zero. Payment processors like Stripe, PayPal or Shopify count too: payouts arrive net of fees and refunds, so the gross sales, the fees and the deposit all need to tie.

2. Nothing is left in "Uncategorized" or "Ask my accountant"

Every accounting system has a parking lot for transactions nobody has decided what to do with. Sometimes it's called Uncategorized Income or Expense, sometimes Suspense, sometimes "Ask my accountant". A few items there mid-month are normal. A balance there at month end means the month isn't finished.

Those transactions are real money. Leave $8,000 of customer deposits in Uncategorized and your revenue is understated; leave a $3,000 equipment purchase there and your expenses are wrong in one direction or the other.

How to check: run a balance sheet and a P&L for the month and look for any account with "uncategorized", "suspense" or "ask" in its name. The balance should be zero. If it isn't, each line needs a home before the month is called closed.

3. Revenue sits in the month the work was done

This is the one most small businesses get wrong without knowing it. Revenue belongs to the month you delivered the work or the product, not the month you sent the invoice and not the month the money arrived.

Three common slips: an invoice dated October 1st for work done in September; a customer's upfront payment for a three-month project booked as revenue the day it lands; an annual subscription recorded as a single month of income. Each one makes one month look great and the next ones look worse, and none of it reflects how the business actually performed.

How to check: pull your invoices dated in the first few days of the following month and ask whether the work was done in the month you're closing. Then look at any large deposit that isn't tied to an invoice. If it's a prepayment, it belongs on the balance sheet as deferred revenue until you earn it.

4. Annual costs are spread across the months they cover

Insurance paid once a year, software billed annually, a retainer paid upfront: if each one hits the P&L in the month you pay it, your margins swing for no reason. January looks terrible, February looks wonderful, and neither tells you anything.

The fix is simple. The payment goes to a prepaid account on the balance sheet, and each month one-twelfth (or whatever share applies) moves to expense. The same logic works in reverse for costs you've incurred but haven't been billed for yet, like a contractor who invoices late: you record them in the month the work happened.

How to check: look at your largest expense lines over the last six months. If one of them spikes in a single month and drops to nothing in the others, ask whether that cost really belonged only to that month. If it covers a year, it should be spread.

5. Someone wrote down what changed and why

This is the sign that separates a closed month from a filed one. After the numbers are reconciled and adjusted, someone looks at them as a whole, compares them with last month and with what was expected, and writes down what moved and why. One page is enough. Three lines will do: what went up, what went down, what to watch.

If nobody can explain the numbers, they aren't closed. They're filed.

The note is also the best error check there is. Explaining why revenue rose 30% is how you notice that half the increase is a deposit that shouldn't be revenue yet. Explaining why payroll dropped is how you find the payroll run that never got recorded.

How to check: ask for last month's note. If there isn't one, write it yourself: compare this month's P&L with last month's and explain every line that moved more than 10%. If you can't explain a change, you've found where to look.

What if your books don't pass?

Most don't, at least not on the first try, and that's useful information rather than a verdict. Start with the first sign that fails, in order: reconciliations first, because everything else depends on cash being right. Then clear the parking lot, then fix revenue timing, then spread the annual costs, then write the note.

If the gap is a few weeks, it's usually a few hours of work. If it's several months, catch up one month at a time, oldest first, and don't trust the year-to-date numbers until you're current.

Two more habits are worth adding once the five are in place. First, make sure every balance sheet account has support: a statement, a schedule or a list that shows why the balance is what it is. Second, lock the period in your accounting software once the month is closed, so nobody changes a closed month by accident.

These five signs are a summary. The full routine, from downloading statements to locking the period, is in our 30-step month-end close checklist, in the order we follow it every month. It's free, and it works the same whether you close the books yourself, with an in-house bookkeeper or with an outside team.