Reconciliations as Controls: Bank and Supplier Statements

Learning objectives

• Prepare a bank reconciliation by comparing the bank statement with the cash book (bank ledger), identifying and explaining all differences.
• Separate timing differences from errors and omissions, and post the required corrections using double entry.
• Record typical bank items (charges, interest, direct debits, standing orders, merchant service charges, dishonoured items) accurately in the accounting records.
• Reconcile supplier balances using supplier statements, resolving differences systematically and reducing payment disputes.
• Explain how reconciliations affect profit, assets, liabilities, and control risk.

Overview & key concepts

Reconciliations are a control procedure that compare an internal record with an independent external record. The aim is to ensure every difference is explained as either:

• Timing:the same transaction exists, but one party has not processed it yet, or
• Error/omission:the transaction is missing or incorrectly recorded and the records must be corrected.

Used consistently, reconciliations improve the reliability of cash and supplier balances, highlight unusual items early, and reduce the risk of duplicate payments and misstatements in profit and liabilities.

Bank reconciliation

What a bank reconciliation explains

A bank reconciliation explains the difference between:

• thecash book (bank ledger) balancein the accounting records, and
• thebank statement balance.

Differences arise because the bank and the business update at different times and because the bank statement can include items the business has not yet recorded.

Timing differences

Timing differences are genuine and are shown in the reconciliation statement but not posted as journals. Common examples:

• Unpresented cheques:issued and recorded in the cash book but not yet cleared by the bank.
• Outstanding lodgements:recorded in the cash book but not yet credited on the bank statement.

Cash book updates (errors and omissions)

Items on the bank statement but missing from the cash book must be posted to update the accounting records. Typical items include:

• bank charges and fees
• interest received or paid
• direct debits and standing orders
• dishonoured customer receipts (returned unpaid)
• merchant service charges / card processing fees
• card receipts paid in by the bank/acquirer(sometimes paid in net of fees)

Where card receipts are paid in net of fees, the gross receipt and fee may both need recording. A common approach is:

• Dr Bank (net amount received)
• Dr Merchant/card fees (fee deducted)
• Cr Sales / receipts (gross amount)

Supplier statement reconciliation

A supplier statement reconciliation compares a supplier’s statement with the supplier’s account in the payables ledger to ensure both parties agree what is owed.

Differences typically arise from:

• invoices/credit notes missing from the business records (book omissions)
• items missing from the supplier statement (supplier omission or timing)
• payments in transit (paid by the business but not yet processed or allocated by the supplier)
• misallocations or duplicates

Only genuine omissions or errors in the business records are corrected with journals. Missing items on the supplier statement are followed up with evidence.

Control accounts as a reconciliation tool

A control account is a general ledger total supported by a detailed subsidiary ledger (for example, trade payables control versus individual supplier balances). Reconciliations help ensure:

• individual supplier accounts are accurate, and
• the sum of the subsidiary ledger agrees to the control account.

A difference indicates missing entries, incorrect postings, or duplication.

Core theory and frameworks

Bank reconciliation as a control investigation

A bank reconciliation works best when treated as a short investigation with two clear outputs:

1. Bring the cash book up to dateusing the bank statement. Items such as charges, interest, direct debits, reversals, merchant fees, and bank-collected items generally require journal entries.
2. Explain the remaining differenceusing timing items only (for example, unpresented cheques and outstanding lodgements). These appear in the reconciliation statement, not in journals.

Decision lens (bank-driven vs business-driven):
When the bank has processed something that the business has not yet recorded (charges, interest, direct debits, reversals), the cash book usually needs an entry.
When the business has initiated something that the bank has not yet processed (unpresented cheques, deposits not yet credited), it is normally a timing item shown only on the reconciliation.

Overdraft presentation (format reminder)

A bank account can be overdrawn. The posting logic in the cash book does not change, but reconciliation formats often show an overdraft as a negative balance. Depending on whether the reconciliation starts from the bank statement or the cash book, the “add/less” presentation may appear reversed. The control objective remains the same: after posting corrections and adjusting for timing, both records should support the same balance.

Worked example

Narrative scenario

A small retail business, ABC Retailers, is reconciling its bank account at 31 December. The cash book (bank ledger) shows a balance of £10,500, while the bank statement shows a balance of £9,800. The following items are identified:

1. Cheque 101 issued for£300, recorded in the cash book but not on the bank statement.
2. Cheque 102 issued for£450, recorded in the cash book but not on the bank statement.
3. Cash lodgement of£1,200recorded in the cash book but not on the bank statement.
4. Bank charges of£50appear on the bank statement but not in the cash book.
5. Direct debit for utilities of£200appears on the bank statement but not in the cash book.
6. Interest received of£30appears on the bank statement but not in the cash book.
7. A customer cheque of£400was recorded as received but later returned unpaid (shown on the bank statement).
8. A payment of£250appears on the bank statement as “Card settlement fee”, not recorded in the cash book.
9. Bank credit of £620appears on the bank statement but has not been recorded in the cash book.
10. An invoice of£500from supplier XYZ Supplies is on the supplier statement but not in the business’s records.
11. A credit note of£100from XYZ Supplies is in the business’s records but not on the supplier statement.
12. A payment of£150sent to XYZ Supplies is not reflected on the supplier statement.
13. An invoice of£200from another supplier, ABC Supplies, is recorded twice in the business’s records.

Required

• Post journal entries to correct the accounting records.
• Prepare a bank reconciliation statement as at 31 December.
• Reconcile the supplier statement from XYZ Supplies.
• Identify and correct the duplicate posting in the business’s records.
• Explain the impact of these reconciliations on the financial statements.

Solution

1) Journal entries (bank items missing from the cash book)

(a) Bank charges

• Dr Bank charges (expense)£50
• Cr Bank£50

(b) Direct debit – utilities

• Dr Utilities (expense)£200
• Cr Bank£200

(c) Interest received

• Dr Bank£30
• Cr Interest income£30

(d) Dishonoured customer cheque (returned unpaid)
This reverses the receipt and reinstates the receivable.

• Dr Trade receivables£400
• Cr Bank£400

(e) Merchant service charge / card processing fee

• Dr Merchant/card fees (expense)£250
• Cr Bank£250

(f) Unrecorded bank credit

• Dr Bank£620
• Cr£620

If the information provided states the source (for example, card takings paid in, a customer receipt, or loan proceeds), credit that account directly. Use a temporary “unidentified receipts” or suspense-type account only where the source is genuinely not provided, and then clear it once evidence confirms the correct classification.

Corrected cash book balance

Starting cash book balance: £10,500
Less outflows recorded above (a, b, d, e): 50 + 200 + 400 + 250 = £900
Add inflows (c, f): 30 + 620 = £650
Net decrease: 900 − 650 = £250

Corrected cash book balance = 10,500 − 250 = £10,250

2) Bank reconciliation statement as at 31 December

Balance per bank statement: £9,800
Add: Outstanding lodgement £1,200
Subtotal: £11,000
Less: Unpresented cheques (300 + 450) £750

Balance per bank statement adjusted for timing differences: £10,250

Corrected cash book balance: £10,250

The reconciliation balances because all reconciling items have been identified and any statement-only items have been posted to the cash book.

3) Supplier statement reconciliation (XYZ Supplies)

A reconciliation explains differences between the supplier statement balance and the supplier ledger balance. The statement balance is a starting point and can reflect several documents and allocations; the reconciliation is explaining the differences, not proving the statement contains only one item.

For illustration, the supplier statement shows a balance of £500 and the differences identified are:

• An invoice for£500on the supplier statement is missing from the business records.
• A credit note for£100is in the business records but not on the supplier statement.
• A payment of£150has been recorded by the business but is not yet shown/allocated on the supplier statement.

Step 1: Post the missing invoice (item missing from the business records)
If the invoice relates to goods for resale, record as purchases/inventory in line with the business’s policy:

• Dr Purchases / Inventory£500
• Cr Trade payables – XYZ Supplies£500

Step 2: Reconcile the remaining differences (items not yet reflected by the supplier)

Starting point: supplier statement balance £500
Less: Credit note in the business records not on the statement £100
Less: Payment recorded by the business not yet shown/allocated by the supplier £150

Reconciled balance payable per business ledger: £250 due

Next action: provide the supplier with evidence of the credit note and payment so they can update their statement and allocation.

4) Correct the duplicate invoice (ABC Supplies)

An invoice of £200 was recorded twice. Reverse one posting.

If the duplicate entry was recorded as a purchase and a payable:

• Dr Trade payables – ABC Supplies£200
• Cr Purchases / Expense (or Inventory)£200

This reduces the payable and removes the overstatement of purchases/expense (or inventory).

5) Impact on the financial statements

Profit or loss effects:

• Bank chargesincrease expenses(£50).
• Utilities direct debitincrease expenses(£200).
• Merchant/card feesincrease expenses(£250).
• Interest receivedincreases income(£30).
• Duplicate invoice correctionreduces purchases/expense(£200) because one copy was erroneous.
• Missing supplier invoiceincreases purchases/expense or inventory(£500), depending on classification.
• The bank credit of £620 affects profit only once it is credited to its correct account (for example, sales, other income, or a receivable settlement). If it is loan proceeds or a capital injection, it increases liabilities or equity rather than profit.

Statement of financial position effects:

• Bank balance in the cash book ends at the corrected reconciled balance£10,250.
• Dishonoured cheque increasestrade receivables(£400) and reduces cash.
• Missing supplier invoice increasestrade payables(£500).
• Duplicate invoice correction reducestrade payables(£200).

Control and risk:

Regular reconciliations improve accuracy, reduce the risk of duplicate payments and misstatement, and help detect unusual transactions promptly.

Common pitfalls and misunderstandings

• Posting timing differences:unpresented cheques and outstanding lodgements are reconciliation items, not journal entries.
• Ignoring bank-statement-only items:charges, direct debits, interest, reversals, and merchant fees must be posted to the cash book.
• Using suspense unnecessarily:suspense is appropriate only where the nature of an item is genuinely not provided and evidence is still being obtained.
• Forcing a balance:do not use unexplained “plug” figures; trace differences to specific transactions.
• Over-correcting supplier differences:post only items genuinely missing from the business records; follow up supplier-side omissions with evidence.
• Incorrect treatment of dishonoured receipts:reinstate the receivable when cash is reversed.
• Failing to remove duplicates:duplicated invoices distort liabilities and profit.
• Weak referencing:lacking cheque numbers, dates, and remittance details makes investigation slower and less reliable.

Summary and further reading

Reconciliations compare internal records to independent statements to confirm completeness and accuracy. Bank reconciliations update the cash book for statement-only items and then explain the remaining difference using timing items. Supplier reconciliations ensure liabilities are complete and correctly measured, reducing the risk of underpayments, overpayments, and disputes.

FAQ

What is the main purpose of a bank reconciliation?

To confirm that the cash book bank balance is supported by the bank statement, with all differences explained and any errors corrected.

Do timing differences require journal entries?

No. Timing differences are included in the reconciliation statement but not posted to the cash book.

Which bank statement items usually require postings?

Charges, interest, direct debits/standing orders, dishonoured receipts, merchant service charges, and bank credits received directly into the account but not yet recorded.

When is it appropriate to use suspense for a bank credit?

Only when the nature of the credit is genuinely not provided and supporting evidence is needed. If the source is stated, credit the correct account immediately.

What does a supplier reconciliation tell you?

It shows why the supplier’s statement balance and your supplier ledger balance differ and identifies whether you must post missing documents or whether the supplier needs evidence to update their records.

Glossary

Bank reconciliation
A statement that explains the difference between the bank statement balance and the cash book bank balance by identifying timing items and required corrections.

Cash book (bank ledger)
The accounting record of bank receipts and payments maintained by the business.

Timing difference
A difference caused by processing delays, where a transaction is recognised by one party before it appears in the other record.

Outstanding lodgement
A deposit recorded by the business that has not yet appeared on the bank statement at the reconciliation date.

Unpresented cheque
A cheque issued and recorded by the business that has not yet cleared through the bank.

Direct debit
A payment collected by a third party under an agreed instruction, often for recurring bills.

Standing order
A recurring payment initiated by the payer for a fixed amount at set intervals.

Bank charges
Fees deducted by the bank for services or transactions, requiring posting to expenses and a reduction in the cash book bank balance.

Dishonoured item
A receipt reversed by the bank (for example, a customer cheque returned unpaid), requiring the receivable to be reinstated.

Merchant service charge / card processing fee
A fee deducted by the bank/acquirer for processing card transactions.

Supplier statement
A supplier’s list of invoices, credit notes, payments, and the closing balance they believe is due.

Remittance advice
A document or message accompanying payment indicating which invoices are being settled.

Control account
A general ledger summary of subsidiary ledger balances used to check completeness and accuracy.

Duplicate posting
An error where a transaction is recorded more than once, distorting balances and potentially profit.