A bank reconciliation compares every transaction in your accounting records to every transaction on your bank statement, and explains any difference. It is the single most important control in small business bookkeeping, because until the two agree, every other number you produce — profit, VAT, tax — is built on something unverified.
It is also the check most commonly skipped, and the reason so many small businesses discover a problem eleven months after it happened.
What it actually is
Two records of the same money:
Your accounting records — what you believe happened
Your bank statement — what the bank says happened
A reconciliation matches them line by line and explains every difference.
The reconciling items that are legitimate:
| Item | Why it differs |
|---|---|
| Uncleared deposits | Received and recorded, not yet reflected by the bank |
| Uncleared payments | Paid and recorded, not yet cleared |
| Bank charges | On the statement, not yet in your books |
| Interest received or paid | Same |
| Debit orders you forgot | Same |
| Returned payments | A customer's payment bounced |
The differences that are not legitimate — and these are the point of the exercise:
A payment on the statement that is not in your books at all
A deposit you recorded that never arrived
The same supplier invoice paid twice
An amount captured incorrectly
A transaction nobody can identify
What an unreconciled account hides
Income you never invoiced. A deposit arrives, nobody matches it to an invoice, and the sale is never recorded. Your revenue is understated, and so is your output VAT — which becomes a SARS problem, not just a reporting one.
Duplicate payments. Paying the same supplier invoice twice is far more common than people expect, particularly where invoices arrive by email and by post. Unreconciled, it is never noticed and never recovered.
Fraud. Unauthorised payments, salary adjustments, and payments to unfamiliar beneficiaries all surface in a reconciliation and nowhere else. In a small business where one person handles payments, the reconciliation is often the only independent check that exists.
Bank errors. Rare, but they happen — and they are only recoverable if found reasonably promptly.
A VAT return you cannot defend. If your bank does not agree to your books, your VAT201 is built on figures you cannot substantiate. That is a difficult position in a verification. See how to respond to a SARS verification request.
Wasted subscriptions. Almost every business reconciling properly for the first time finds two or three debit orders for services nobody uses.
How to do one
1. Start with the closing balance on your bank statement.
2. Match every transaction. Most accounting software with a live bank feed does the bulk of this automatically, suggesting matches against invoices and bills.
3. Deal with the unmatched items.
On the statement but not in the books — record it. Bank charges, debit orders, a deposit you did not know about.
In the books but not on the statement — check the date. If it is genuinely uncleared, it is a legitimate reconciling item. If it is three months old, something is wrong.
4. Investigate anything you cannot identify. Do not force a match, and do not post an unknown to a suspense account and move on. See what is a suspense account when it publishes.
5. Confirm the reconciled balance agrees to the statement.
6. Repeat for every account — every bank account, credit card, card machine and payment gateway.
How often
Weekly if you have meaningful volume, cash, or several payment channels.
Monthly at absolute minimum, and before the VAT return rather than after.
Never annually. A reconciliation done once a year is not a control, it is an archaeology project. The transactions nobody can identify in March are the ones from the previous May, and by then the person who made them may have left.
A live bank feed changes the economics entirely. Most South African accounting packages connect directly to the major banks, which turns reconciliation from a data-entry task into a review task. If you are still importing statements manually, this is the single highest-return improvement available to your bookkeeping.
The signs yours is not being done
Your accountant asks about transactions from six months ago
The bank balance in your accounting system does not match your banking app
There is a large or growing suspense account balance
Nobody can tell you your current cash position without opening the bank app
Your VAT return is prepared from bank statements rather than from the ledger
The last reconciliation on file is dated more than two months ago
Any one of those is worth acting on. The cost of fixing an unreconciled account rises with every month it stays that way.
Frequently asked questions
What is a bank reconciliation? A comparison of every transaction in your accounting records against every transaction on your bank statement, explaining any difference. It confirms that what you believe happened matches what actually happened.
Why is a bank reconciliation important? Because until your books agree to your bank, every figure produced from them is unverified — including profit, VAT and tax. It is also the control that catches unrecorded income, duplicate payments, unauthorised transactions and forgotten debit orders.
How often should I reconcile my bank account? Weekly if you have meaningful transaction volume, cash takings or several payment channels. Monthly is the absolute minimum, and it should be done before the VAT return rather than after.
What are reconciling items? Legitimate timing differences such as uncleared deposits and payments, plus items on the statement not yet in your books such as bank charges, interest and debit orders. Anything else — a payment you cannot identify, a deposit that never arrived, a duplicate — is an error to investigate.
What if I cannot identify a transaction? Investigate it rather than forcing a match or parking it in a suspense account. Unidentified transactions are how unrecorded income and unauthorised payments stay hidden, and they become much harder to trace with time.
Does accounting software do bank reconciliation automatically? A live bank feed automates most of the matching, but the review is still yours. The software proposes matches; deciding whether they are correct, and investigating what does not match, is the part that provides the control.
The check that makes everything else reliable
Every number your business produces sits on top of the bank reconciliation. Skip it, and profit, VAT and tax are all estimates dressed as facts.
Smartbook reconciles every bank account, card and payment gateway monthly as part of bookkeeping — with live bank feeds so it is a review rather than a data-capture exercise.
Last reviewed: 26 July 2026. Written by the Smartbook team — SAIPA and SAICA accredited, SARS registered tax practitioners. General guidance, not advice on your circumstances.