"We close the books monthly" gets said a lot without much definition behind it. Here is the actual work, in the order it has to happen — because several of these steps depend on the ones before them.
1. Complete the capture
Everything that happened has to be in the file: bank and card activity imported, bills entered, invoices issued, payroll recorded, cash transactions captured.
The failure here is silent. A stalled bank feed does not announce itself. So the first check is that the last imported transaction is where you expect it to be on every connected account.
2. Categorise, and query what you cannot
Every transaction gets classified. The important part is the exception handling: anything ambiguous goes on a list to ask about rather than being assigned a plausible guess.
A guess is indistinguishable from knowledge once it is in the file. Six months later nobody can tell which entries were certain and which were someone's best assumption.
3. Reconcile every account
Bank, credit cards, loans, and any merchant or processor account — each matched to its external statement. This is the step that tests the file against the outside world, and nothing after it means much if it is skipped.
Differences get investigated, not plugged.
4. Post the adjusting entries
The entries that make the period reflect what actually happened rather than what happened to hit the bank:
- Accruals — expenses incurred but not yet billed.
- Prepaid amortisation — the annual insurance premium recognised a month at a time.
- Deferred revenue — moving the earned portion of prepayments into revenue.
- Depreciation — the monthly slice of fixed asset cost.
- Payroll accrual — where a pay period straddles the month end.
These are what separate a real close from a categorised bank feed.
5. Review the balance sheet, account by account
The step most often skipped, and the one that catches the most.
Does cash match the bank? Does receivables look like what customers owe? Do the loan balances agree with the lenders? Have the payroll and sales tax liabilities cleared as remittances were made? Is there anything sitting in a holding or suspense account?
Errors accumulate on the balance sheet. Reviewing it monthly is how you find them while they are still small and recent.
6. Review the P&L against expectations
Compare to last month and the same month last year. You are not looking for perfection — you are looking for the thing that does not make sense. Revenue up but cost of goods flat. An expense category that doubled. A line that went to zero.
Each of those is either a real business event you should know about, or a coding error. Both are worth finding.
7. Lock the period
Once it is closed, close it. Locking prevents someone recategorising a transaction in a closed month, which silently changes figures you have already reported and breaks the reconciliation that was done.
A file where prior periods keep moving is a file nobody can rely on, including your accountant.
8. Deliver, and say what changed
The statements go out with a short note on anything unusual — the large one-off, the customer who paid three invoices at once, the accrual that reversed. Reports without context get filed unread; reports with two sentences of explanation get acted on.
How long it takes
For a small business with a couple of accounts and modest volume, a competent close runs a few hours. Most of it is steps 3 and 5. Steps 1 and 2 feel like the work but are the fastest part when the file is set up properly.
The gap between a real close and a rough one is almost entirely the reconciliation and the balance sheet review. Those are the two that get dropped under time pressure, and they are the two that were doing the work.
This sequence is what monthly bookkeeping actually is — and rebuilding it, period by period, is what a cleanup does for months where it never happened.
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