A bank balance can look healthy while the books tell a very different story. A customer payment may not have been allocated, a supplier bill may be duplicated, or a card charge may have been coded to the wrong expense. Knowing how to reconcile bank transactions helps you find these issues before they affect your BAS, cash flow decisions or year-end financial statements.
Bank reconciliation is one of the most useful regular checks for any sole trader or business. It compares the transactions recorded in your accounting file with the transactions that have actually cleared through your bank account. When both records agree, you have a clearer picture of what you have earned, spent and still owe.
What bank reconciliation actually checks
A reconciliation is not simply ticking off transactions in your accounting software. It is a process of confirming that each amount on the bank statement has a matching and correctly coded entry in your books.
For example, an electrician might receive a $1,650 customer payment that includes GST. The money appears in the bank feed, but it still needs to be matched to the right invoice and income account. If it is instead entered as a new sale, income may be overstated. If it is coded as GST-free when GST applies, the BAS may be wrong.
The same applies to expenses. A fuel purchase, subcontractor payment, merchant fee, loan repayment or wages payment may all leave the bank account, but they have different reporting and tax treatments. Reconciling regularly creates a practical control point before those transactions flow into reports and lodgements.
How to reconcile bank transactions step by step
Start by choosing a regular schedule. Many businesses reconcile weekly, particularly where there are frequent card payments, online sales, payroll runs or supplier transfers. A smaller sole trader business may reconcile monthly. The best frequency depends on transaction volume, but leaving it until tax time usually creates unnecessary work and makes errors harder to trace.
1. Gather the records for the same period
Use the bank statement or bank feed for the account and period you are reconciling. Have your accounting software open, along with relevant invoices, bills, receipts and payroll records. If you use separate accounts for business savings, payroll, loans or merchant settlements, each account should be reconciled separately.
Check the opening balance first. It should match the closing reconciled balance from the previous period. If it does not, avoid forcing the reconciliation through. The issue may be an altered prior transaction, a deleted entry or a reconciliation completed incorrectly in an earlier month.
2. Match deposits to the correct income or transfer
Review money received into the bank account line by line. Customer payments should generally match an invoice or sale already recorded in your system. Transfers from another account you own are not sales and should be recorded as transfers, not income.
This distinction matters for GST and for meaningful reporting. A transport operator transferring funds from a savings account to cover vehicle repairs has not earned new income. Similarly, a business loan drawdown is not ordinary sales income, even though it increases the bank balance.
Be alert to grouped deposits from payment platforms or merchant terminals. The amount arriving in the bank may be the customer takings less processing fees. Record the gross sale and the fee correctly rather than treating the net deposit as the full sale. This gives a more accurate view of turnover and expenses.
3. Match payments to bills, expenses or liabilities
Next, review payments leaving the account. Match supplier payments against outstanding bills where possible. This prevents the same expense being recorded twice – once when the bill was entered and again when the payment is imported.
For payments that were not previously entered, code them carefully using the invoice, receipt or supporting record. Consider whether GST was charged, whether the expense is business-related and whether it belongs to the current period. A purchase on a business debit card is not automatically deductible just because it came from the business account.
Some payments need to be split. A loan repayment, for instance, commonly includes principal and interest. The principal reduces the loan balance, while the interest may be an expense. A single payment coded entirely to interest or entirely to the loan account will distort the accounts.
4. Account for payroll, super and tax payments
Payroll entries often cause reconciliation differences because one pay run can create several separate bank transactions. Net wages are paid to employees, PAYG withholding is later paid to the ATO, and superannuation is paid through a clearing house or fund. These are related, but they should not all be treated as wage expense when the money leaves the account.
Match net wages to the payroll clearing or wages liability entry created by your payroll system. Code PAYG withholding and super payments against their relevant liability accounts. Doing this consistently supports accurate STP reporting, superannuation records and BAS preparation.
If a payment to the ATO covers more than one obligation, such as GST and PAYG withholding, use the activity statement or payment reference to allocate it properly. A lump-sum payment coded only to GST can leave payroll liabilities looking unpaid when they are not.
5. Investigate unmatched and duplicated transactions
At the end of the process, your accounting software should show that the bank balance and reconciled book balance agree. Any unmatched item needs an explanation, not a guess.
Common causes include bank fees, direct debits, interest received, dishonoured customer payments, uncleared cheques, duplicate imports and transactions posted to the wrong bank account. Timing can also be legitimate. A payment made on 30 June may not clear the bank until July. It can remain as an outstanding item if it has been correctly recorded and you can identify why it has not appeared on that period’s statement.
Do not delete a transaction merely to make the reconciliation balance. Deleting may remove an important audit trail or create an incorrect BAS position. Correct the coding, date, account or duplication issue instead, and retain the documents that support the change.
Bank feeds save time, but they do not replace review
Bank feeds can bring transactions into accounting software automatically, reducing manual data entry. They are valuable, especially for businesses with high transaction volumes. However, a bank feed only shows that money moved. It cannot reliably determine the purpose of every transaction, the correct GST treatment or whether an expense is deductible.
Rules and suggested matches can speed up recurring items such as rent, software subscriptions or phone bills. Review those rules periodically. A supplier may change what they provide, a subscription may include a new service, or a previously business-only cost may become partly private.
For businesses using company cards, keep receipts and ensure cardholders provide enough detail about the purchase. The bank description ‘CARD PURCHASE’ is rarely sufficient evidence on its own. Clear records are particularly important where meals, travel, motor vehicle costs or mixed business and private expenses are involved.
Common reconciliation problems for small businesses
A frequent issue is using the business account for personal spending. It is better to keep private and business finances separate, but where a private payment does occur, record it correctly as drawings, a shareholder loan or another appropriate owner account. Do not code it to office expenses simply because it was paid from the business account.
Cash takings need similar care. If a retailer banks cash after taking money from the till for small purchases, the banked amount will not equal gross sales. Record the sales and the cash expenses separately so the difference makes sense.
Construction, cleaning and trade businesses may also receive deposits, progress payments and retention amounts. Match these to the relevant customer invoices and review whether GST is reported on the correct basis for your business. Businesses registered on a cash basis generally report GST when payments are received or made, while accruals accounting follows different timing rules.
Another issue is treating every bank transaction as a tax deduction. Reconciliation supports accurate bookkeeping, but deductibility depends on the nature and purpose of the expense. Keep tax invoices and other records, particularly for larger purchases and transactions with GST.
Build reconciliation into your monthly routine
Set aside a fixed time after month end to reconcile all bank accounts, credit cards, loans and payment platforms. Then review aged customer invoices, unpaid supplier bills and liability balances. This turns reconciliation into more than a compliance task – it gives you useful information about overdue debtors, upcoming cash commitments and unusual spending.
Before lodging a BAS, confirm that the relevant accounts have been reconciled and that GST codes have been reviewed. This is particularly worthwhile after busy periods, major equipment purchases, staff changes or a switch in payment providers. A quick review then can prevent a correction later.
Where the records have fallen behind, start with the oldest unreconciled month and work forward in order. It may feel slower at first, but it protects the opening balances each following month relies on. For complex businesses, or where errors have built up over several BAS periods, professional bookkeeping support can save considerable time and reduce the risk of reporting mistakes.
Accurate reconciliations give you something more useful than a balanced screen: confidence that the figures you are using to run your business reflect what has actually happened. A regular, well-documented process keeps financial administration clear, manageable and ready when decisions or deadlines arise.