Monthly Bookkeeping Checklist
A monthly bookkeeping checklist covers four stages: reconcile every bank and payment account against your records, confirm every supplier invoice for the month is entered and filed, review your VAT position before the filing deadline, and close the month so next month starts clean. Done every month, this routine is what makes year-end a formality instead of a fire drill.
Monthly bookkeeping is where most small businesses drift. The work is not hard — it is repetitive, and repetition is exactly what gets skipped when the business is busy. The result is the same every time: a quarter or a year of catch-up, late VAT filings, and invoices no one can find. This checklist is the minimum routine that keeps the books usable month to month, so the books reflect reality when you — or your accountant — need them to.
Reconcile accounts
Reconcile every bank account against your books
Bank reconciliation is the single most reliable way to catch missing invoices, duplicate payments, and unrecorded fees. A monthly reconciliation turns a year-long mystery into a 20-minute investigation.
Reconcile card terminals, payment gateways and POS systems
Card and POS transactions are easy to miss because they settle in batches, often a day or two after the sale. Unreconciled gateways are a common source of phantom revenue or missing fees at year-end.
Enter & verify invoices
Confirm every supplier invoice received this month is entered
A single unentered supplier invoice skews your expense figures and your VAT position. The monthly close is the last chance to catch one before it shows up as a discrepancy in the next VAT return.
Check that no invoice is entered twice
Duplicate invoices are the second most common bookkeeping error after omissions. A quick scan for repeated invoice numbers, dates and amounts — or a tool that flags them — prevents a quiet overstatement of expenses.
Match each entered invoice to its PDF or scan
An entry without the underlying document is an audit risk. If the tax office asks for proof, the entry alone is not enough — the document has to be there, in a place anyone can find.
Review & close
Review your VAT position before the filing deadline
Checking your VAT liability days before the deadline — not the day of — leaves time to fix errors instead of filing a return you know is wrong and amending it later.
Lock the month once reconciled
A closed month cannot be silently edited. Locking prevents a November change from quietly rewriting October’s figures, which is how small errors compound into year-end restatements.
How Nika helps
Nika handles the invoice half of this checklist every day, not just at month-end. She enters every supplier invoice the day it arrives, flags duplicates, and files the PDF where your records live. At month-end, the invoices are already done — reconciliation becomes checking against a complete set, not chasing a backlog.
Questions
How many hours does monthly bookkeeping take?
For a small business with 50–200 monthly transactions, a clean monthly close takes 2–4 hours when the books are kept current. The same close takes a full day — or a weekend — when invoices have piled up and bank lines were never reconciled. The time is not in the work; it is in the catch-up.
Does Nika reconcile my bank account?
No. Nika enters and files supplier invoices — she does not reconcile bank statements or card terminals. What she does is make sure that when you (or your accountant) sit down to reconcile, every invoice is already in the books, so reconciliation is a check rather than a hunt.