Use this monthly bookkeeping checklist to keep invoices, expenses, bank records and supporting documents organised throughout the year. The 12 practical checks below are designed for UK sole traders and small businesses.
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1. Collect sales and income records
- Confirm that issued sales invoices are recorded.
- Record other business income with a useful description.
- Check whether cancelled or corrected invoices have been handled properly.
- Keep sales-platform or payment-provider statements where relevant.
2. Organise purchase invoices and receipts
Gather supplier invoices, till receipts, emailed receipts and subscription documents. Make sure each record shows the supplier, date, description and amount. Keep business and personal expenditure clearly separate.
2026-09-02_ExampleSupplier_42-50.pdf
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3. Update bank and card transactions
Bring every relevant business bank account, credit card and payment account up to date. Check for missing feeds or unimported statement periods.
4. Reconcile the bank accounts
Match statement lines to existing invoices and bills before creating new entries. Record transfers between business accounts correctly and investigate unfamiliar items.
Use our step-by-step Xero bank reconciliation guide if you work in Xero.
5. Review customer invoices
Check which invoices have been paid, which remain outstanding and whether any receipts were allocated to the wrong customer. Follow up overdue invoices using your normal credit-control process.
6. Review supplier amounts
Confirm that supplier bills are not missing or duplicated. Compare statements from important suppliers where available and note payments due soon.
7. Check cash and out-of-pocket purchases
Cash expenditure can be missed because it does not appear on the business bank statement. Record it only with appropriate evidence and a clear explanation.
8. Review payroll bookkeeping
Where payroll applies, keep the payroll reports, payment records and any pension information needed for the books. Check that net wages and related payments agree with the bank transactions.
9. Check VAT records where applicable
If the business is VAT-registered, identify missing invoices and review unusual VAT treatments before the return period closes. Do not assume that VAT is recoverable from every business payment.
10. Review CIS bookkeeping where applicable
Keep contractor or subcontractor statements, payment details and deduction records organised. Make sure transactions are recorded consistently and the supporting documents can be found.
11. Investigate unusual balances
Look for duplicate expenses, negative customer balances, old unpaid items, large “uncategorised” totals or transactions posted to an unexpected account. A balanced bank does not automatically mean every category is correct.
12. Securely file the month’s records
Use a consistent folder structure, restrict access to authorised people and remove unnecessary duplicates securely. Keep records for the period required for your business.
Monthly handover checklist
What should be sent to a bookkeeper?
Usually this includes sales records, purchase documents, bank and card information, payment-platform statements, payroll reports and a short list of explanations. See our complete guide to what to send your bookkeeper each month.
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Frequently asked questions
How long should monthly bookkeeping take?
It depends on the number of transactions, accounts, documents and unresolved questions. Consistent record keeping usually reduces the time required.
Can I do the checklist quarterly instead?
You can choose a routine that suits the business, but longer gaps make missing evidence and unfamiliar transactions harder to resolve.
Does completed reconciliation prove the books are correct?
No. Account categories, VAT treatment and supporting evidence still need to be reviewed.
How to use this monthly bookkeeping checklist
First, gather bank records, invoices and receipts. Next, check that each document covers the correct month. Then, record and categorise the transactions consistently. After that, reconcile each bank and credit-card account. However, investigate missing or duplicated entries before completing the review. Therefore, keep a short list of anything that still needs attention. For example, ask for a missing supplier invoice while the purchase is still recent. In addition, review unpaid customer balances. As a result, your reports will be more complete. Finally, store the finished records securely for the next reporting period.