VCE Accounting (Year 11) · Unit 1 — Role of Accounting · 18m read

Double-Entry Bookkeeping and the General Journal

Ever wondered why every time money comes in, something else has to go out on paper? Double-entry bookkeeping records both sides of every business transaction—so when you earn $100, you record where it came from and where it went. Learning this system unlocks your ability to track money accurately, spot errors, and prepare financial statements that actually balance—essential skills for accounting and running any business.

Learning objective: Record business transactions using double-entry bookkeeping in the General Journal.

By the end of this lesson you can:

I can explain the rules of debit and credit for each account type.
I can record journal entries with correct debit and credit analysis.
I can explain the T-account structure.

Double-entry is a mirror. Every transaction appears twice — a debit and a credit — mirror images that keep the books balanced.

Double-entry and the rules of debit and credit

### Double-entry principle

Every financial transaction is recorded TWICE:
- A DEBIT in one account
- An equal CREDIT in another account

This ensures the accounting equation always stays in balance.

### The rules of debit and credit

| Account type | Normal balance | Increases with | Decreases with |
|-------------|----------------|----------------|----------------|
| Asset | Debit | Debit | Credit |
| Liability | Credit | Credit | Debit |
| Owner's Equity | Credit | Credit | Debit |
| Revenue | Credit | Credit | Debit |
| Expense | Debit | Debit | Credit |

Memory aid: "DEAD CLIC"
- Debits increase Expenses, Assets, Drawings
- Credits increase Liabilities, Income (Revenue), Capital

### The T-account

A simple way to show the two sides of an account:

Account Name
---------------------
Debit | Credit
|

The balance is the difference between the debit total and credit total.

### The General Journal

The General Journal records transactions chronologically:

Date | Account Title | Debit | Credit
--------|-------------------------|--------|-------
1 July | Cash | 5,000 |
| Capital | | 5,000
| (Owner invested cash) | |

Rules for journal entries:
1. Debit account listed first.
2. Credit account indented.
3. Brief narration explaining the transaction.
4. Debits = Credits in each entry.

Double-Entry Rules

Debit = Credit: \sum \text{Debits} = \sum \text{Credits} (Every entry; every period)
Asset balance: A_{balance} = A_{Dr\,total} - A_{Cr\,total} (Normal debit balance)
Liability balance: L_{balance} = L_{Cr\,total} - L_{Dr\,total} (Normal credit balance)

Key ideas at a glance

DEAD CLIC: Debits: expenses, assets, drawings; Credits: liabilities, income, capital.
Every entry balances: Debits = credits.
Narration: Explain the entry.
Source documents: Evidence.

Worked example (Medium)

Record the following transactions in General Journal format: (a) Owner invested $20,000 cash. (b) Purchased equipment $8,000 cash. (c) Made credit sales $3,000.

(a) Owner invested $20,000 cash. Cash (asset) increases → Debit. Capital (OE) increases → Credit. \text{Dr Cash} \ 20{,}000 \quad | \quad \text{Cr Capital} \ 20{,}000
(b) Purchased equipment $8,000 cash. Equipment (asset) increases → Debit. Cash (asset) decreases → Credit. \text{Dr Equipment} \ 8{,}000 \quad | \quad \text{Cr Cash} \ 8{,}000
(c) Credit sales $3,000. Accounts Receivable (asset) increases → Debit. Sales Revenue (revenue) increases → Credit. \text{Dr Accounts Receivable} \ 3{,}000 \quad | \quad \text{Cr Sales Revenue} \ 3{,}000

Answer: Three journal entries, each with Debits = Credits. Equipment purchase exchanges one asset (cash) for another (equipment) — total assets unchanged.

Worked example (Hard)

Record the following transactions in general journal format with narrations: (a) Owner invested a vehicle worth $25,000 and $10,000 cash. (b) Purchased supplies $1,200 on credit. (c) Received $500 cash from a debtor. (d) Paid electricity $350 cash.

(a) Owner investment — non-cash + cash. Two assets increase; Capital increases by the total. \text{Dr Vehicle } 25{,}000 + \text{Dr Cash } 10{,}000 \quad | \quad \text{Cr Capital } 35{,}000
(b) Credit purchase. Asset increases; Liability increases. \text{Dr Supplies } 1{,}200 \quad | \quad \text{Cr Accounts Payable } 1{,}200
(c) Debtor payment. One asset increases (Cash); another decreases (Accounts Receivable). Total assets unchanged. \text{Dr Cash } 500 \quad | \quad \text{Cr Accounts Receivable } 500
(d) Expense payment. Expense increases (debit); Asset decreases (credit). \text{Dr Electricity Expense } 350 \quad | \quad \text{Cr Cash } 350

Answer: Four entries, all balanced (Dr = Cr). Key insight: (a) shows that non-cash contributions are recorded at fair value; (c) is NOT revenue — it is collection of an existing receivable (no new income); (d) is an expense reducing both assets and equity.

Why Double-Entry? The Logic Behind the System

Double-entry bookkeeping was developed by Luca Pacioli in 1494 and has survived unchanged for over 500 years because it is logically complete — every transaction is recorded from two perspectives, creating a self-checking system.

The fundamental logic:
Every business event involves a give and take. When you buy inventory for cash, you GIVE cash and TAKE inventory. Both sides must be recorded — if you only record one side, you lose information and your records become unreliable.

The DEAD CLIC mnemonic:
This is the most important rule in accounting:
- Debits increase: Expenses, Assets, Drawings
- Credits increase: Liabilities, Income (revenue), Capital

Why debits and credits?
The terms "debit" (left) and "credit" (right) are simply conventions — they have no inherent meaning of "good" or "bad." What matters is consistency: assets and expenses increase on the LEFT side of an account; liabilities, revenue, and capital increase on the RIGHT side.

The self-checking feature:
Because every transaction has equal debits and credits, the total of all debit balances in the system should always equal the total of all credit balances. This is verified by the Trial Balance. If debits ≠ credits, an error has occurred.

VCE application: When you encounter any accounting transaction, follow this process: (1) Identify the accounts affected. (2) Determine each account's type (asset, liability, OE, revenue, expense). (3) Apply DEAD CLIC to determine debit or credit. (4) Verify Debits = Credits. This systematic approach prevents errors and earns full marks.

Common mistakes

Reversing debit and credit for expenses Students often think expenses are credits because they "reduce" profit. Expenses have a DEBIT normal balance — they increase with debits. Fix: Use DEAD CLIC: Debits increase Expenses. When you pay rent, Dr Rent Expense (increases the expense) and Cr Cash (decreases the asset).
Forgetting the narration in journal entries Narration explains what happened. Without it, journal entries are meaningless records. Fix: Always add a brief narration in brackets after each journal entry: "(Being: owner invested cash)".

Practice questions

A business pays rent of $800 cash. The correct journal entry is:
1. Dr Cash 800; Cr Rent Expense 800
2. Dr Rent Expense 800; Cr Cash 800
3. Dr Cash 800; Cr Revenue 800
4. Dr Liability 800; Cr Cash 800
(1 marks)
Record these transactions in journal entry format: (i) Purchased inventory on credit $2,500. (ii) Received payment from a customer who owed $1,200. (iii) Paid wages $1,000 cash.
(3 marks)

Summary

Every transaction: one debit + one equal credit.
DEAD CLIC: Debits ↑ Expenses, Assets, Drawings. Credits ↑ Liabilities, Income, Capital.
Journal entry format: Dr (account) amount | Cr (account) amount + narration.
T-account: left = debit, right = credit. Balance = larger side minus smaller.