ACF5950 · Introduction to Financial Accounting
Accounting Information Systems and Internal Control
Week 7 turns to how records are built and safeguarded: the accounting information system, special journals and subsidiary ledgers with their control accounts, and the principles of internal control — establishment of responsibility, segregation of duties, documentation, physical controls and independent verification (learning outcome 4). A central technical skill is the bank reconciliation, which reconciles the ledger cash balance to the bank statement and identifies which items need adjusting entries. Internal control and bank reconciliation are practical, examinable topics and align closely with the applied Project. The week shown is the unit's standard arc — confirm the exact teaching week on Moodle / the unit outline.
What this chapter covers
- 01The accounting information system (AIS): collecting, processing, storing and reporting accounting data
- 02Special journals (sales, purchases, cash receipts, cash payments) for high-volume transactions
- 03Subsidiary ledgers and control accounts: the general-ledger control balance equals the sum of the subsidiary accounts
- 04Principles of internal control: responsibility, segregation of duties, documentation, physical/electronic controls, independent verification, human-resource controls
- 05Controls over cash and their purpose (safeguard assets, reliable records, efficiency, compliance)
- 06Bank reconciliation: deposits in transit, unpresented cheques, bank charges, EFT/direct credits, and errors
- 07Identifying which reconciling items require adjusting journal entries
Bank reconciliation to the true cash balance
- +1Adjust the bank statement for items the bank has not yet processed: 14,180 + 2,300 deposits in transit − 3,600 unpresented cheques = 12,880.
- +1Adjust the books for items the entity has not yet recorded: 12,400 + 600 direct credit − 120 bank charges = 12,880.
- +1Both sides now agree at the true cash balance of 12,880, so the reconciliation is complete.
- +1Only the book-side items need adjusting journal entries: Dr Cash 600 / Cr Accounts receivable 600 (the EFT receipt) and Dr Bank charges expense 120 / Cr Cash 120. Deposits in transit and unpresented cheques are timing differences and need no entry.
Key terms
- Accounting information system (AIS)
- The people, records and procedures (increasingly computerised) that collect, process, store and report an entity's accounting data.
- Subsidiary ledger
- A ledger holding the detailed accounts behind a general-ledger control account (for example, one account per customer behind Accounts Receivable).
- Control account
- A general-ledger account whose balance equals the total of its subsidiary ledger — a built-in check on the detail.
- Segregation of duties
- An internal-control principle: no single person controls all stages of a transaction (authorising, recording, custody), reducing the risk of error and fraud.
- Bank reconciliation
- The process of reconciling the cash-ledger balance to the bank-statement balance, explaining the differences and identifying items needing adjustment.
- Deposit in transit
- Cash recorded and banked by the entity but not yet shown on the bank statement — a timing difference that adjusts the bank side, with no journal entry.
Accounting Information Systems and Internal Control FAQ
Why do the bank statement and the cash ledger differ?
Because of timing differences and unrecorded items. The entity may have banked deposits or written cheques the bank has not yet processed (deposits in transit, unpresented cheques), and the bank may have applied charges, interest, or electronic receipts the entity has not yet recorded. A bank reconciliation explains every difference and brings both to the same true cash balance.
Which reconciling items require a journal entry?
Only those the entity has not yet recorded in its books — bank charges, interest earned, direct credits and debits (EFTs), dishonoured cheques, and any errors in the ledger. Deposits in transit and unpresented cheques are the bank's timing lag; you adjust the bank-statement side for them but make no journal entry.
What is segregation of duties and why does it matter?
It is the internal-control principle that the authorising, recording and custody functions for a transaction should be handled by different people, so that no one individual can both commit and conceal an error or fraud. It is a key control over cash and is a common exam and case-scenario theme.
Can AI help me with bank reconciliations in ACF5950?
Yes, as a tutor. Sia can lay out the two-column reconciliation, show which items adjust the bank side versus the book side, and identify the adjusting entries. It is for understanding and rehearsal only, not for graded work — confirm the AI policy for each assessment on Moodle, as Monash academic-integrity rules apply.
Exam move
Drill the bank reconciliation as a two-sided routine: adjust the bank-statement balance for deposits in transit and unpresented cheques, adjust the book balance for bank charges, interest, EFTs and errors, and prove both reach the same true cash figure. Then separate the two outcomes — only the book-side items become adjusting journal entries. Learn the internal-control principles by name and be able to apply them to a short scenario (which control was missing, what risk it exposed), because that applied framing is how they are examined. This chapter's technical and control skills also underpin the applied Project (learning outcome 4), so practise both the mechanics and the interpretation.
Working through Accounting Information Systems and Internal Control in ACF5950? Sia is AskSia’s AI Business and Economics tutor — ask any ACF5950 Accounting Information Systems and Internal Control question and get a clear, step-by-step explanation grounded in how ACF5950 is taught and assessed. Read this chapter free, then take your hardest questions to Sia.
