The month-end bookkeeping checklist every limited company should follow


Ask most directors when they last looked at their books and the honest answer is "sometime around the year end". That is exactly when problems surface: missing receipts, a bank balance that does not match the ledger, and a VAT return built on guesswork. A short, repeatable month-end routine fixes all of that: an hour or two, done properly, keeps your records clean and gives you numbers you can actually trust.

Why a monthly routine pays for itself

When your books are only touched once a year, every error compounds. A duplicated invoice in April becomes a VAT mistake in the quarter to June and a cash-flow surprise in December. Monthly checks catch these things while they are still easy to fix.

There is a second benefit that matters even more. Up-to-date books give you a live picture of profit and cash. You can see which customers are paying late, whether your margins are holding, and how much tax is quietly building up. Directors who review their numbers monthly make better decisions than directors who wait for the annual accounts. Many smaller companies hand this rhythm to providers of accounting outsourcing services so the checks happen on schedule every month, whether the office is busy or not.

Your month-end checklist, step by step

Work through these in order. Tick them off as you go.

1. Reconcile every bank account

Download the bank statement for each business account and match every line to your bookkeeping software. Investigate anything unexplained the same day, not next month. Small unmatched items are how errors hide. A fully reconciled bank account is the foundation everything else rests on, so never skip this step.

2. Review sales invoices and chase late payers

Check that every job or sale made this month has an invoice, and that the invoice dates, amounts and VAT treatment are right. Then look at your aged debtors report. Anything past its due date needs a polite chase now.

3. Match purchase invoices and gather receipts

Collect every receipt and invoice for the month and match them to the bank statement. Anything missing needs chasing from the supplier while it is fresh. Scan or photograph receipts the day you receive them. Cardboard shoeboxes of faded till slips are how allowable expenses get lost at year end.

4. Reconcile payroll to the profit and loss account

Compare the month's payroll totals to what has been posted in the accounts. Gross pay, employer national insurance and pension contributions should all appear correctly. Check the PAYE liability matches what HMRC expects.

5. Prepare your VAT figures

Even if your VAT quarter does not end this month, keep a running total of output VAT on sales and input VAT on purchases. When the quarter does end, the return should be nearly done already. Check the figures against your bank receipts.

6. Check the directors' loan account

If you have drawn money from the company beyond salary and dividends, it sits in your directors' loan account. Review the balance monthly. If it stays overdrawn at the year end and is not repaid within nine months and one day of the year end, the company faces an extra tax charge, currently 35.75 per cent of the overdrawn amount. Monthly checks keep this under control.

7. Match supplier statements to your ledger

Ask your regular suppliers for monthly statements and compare them to your purchase ledger. Missing invoices mean missed VAT reclaims and a balance sheet that understates what you owe.

8. Run a quick management accounts review

Produce a simple profit and loss for the month and the year to date, plus a snapshot of debtors, creditors and the bank balance. Ask three questions: are we profitable, is cash moving in the right direction, and who owes us money? If you want this done properly each month, management accounting services can produce a clean set of management accounts on a fixed monthly schedule.

9. Lock the month and file everything

Once everything reconciles, lock the period in your software so nothing can be altered by accident. File the bank statements, invoices, payroll reports and VAT workings for the month in one place, digital or physical.

The monthly deadlines to put on your calendar

Month-end bookkeeping is not just about tidiness, it keeps you compliant. Put these dates on a repeating reminder. PAYE and national insurance for the previous month must reach HMRC by the 22nd if you pay electronically. Construction industry scheme deductions follow the same 22nd deadline. Your RTI payroll submission has to be filed on or before each payday. If you are on standard VAT quarters, the return and payment are due one calendar month and seven days after the quarter end.

When month-end keeps slipping

The most common reason month-end does not happen is that nobody owns it. Give one person the job, give them the checklist, and protect the time in the diary. A monthly routine done by someone who does it every day for a living is one of the cheapest investments a growing company can make, and it pays for itself in fewer errors, better cash flow and calmer year ends.


 

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