How do the rules of debit and credit decide which side of an account records an increase?
Apply the rules of debit and credit to the five elements and identify the normal balance of each account
A focused answer to the O-Level Principles of Accounts outcome on the rules of debit and credit. The DEAD CLIC rules for the five elements, the normal balance of each account, and worked entries for everyday transactions.
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What this dot point is asking
SEAB wants you to apply the rules of debit and credit to the five elements and to state the normal balance of each kind of account. This is the grammar of double entry: once you know which side records an increase for each element, you can record any transaction. The central insight is that "debit" and "credit" are simply the left and right sides of an account; whether a debit increases or decreases an item depends entirely on what type of element the account is.
The answer
Debit and credit are sides, not values
Every ledger account has two sides: debit on the left and credit on the right. A debit is not "good" and a credit is not "bad". Each element has a natural side on which an increase is recorded.
The rules for the five elements
| Element | Increase recorded by | Decrease recorded by | Normal balance |
|---|---|---|---|
| Asset | Debit | Credit | Debit |
| Expense | Debit | Credit | Debit |
| Liability | Credit | Debit | Credit |
| Owner's equity (capital) | Credit | Debit | Credit |
| Income | Credit | Debit | Credit |
The DEAD CLIC memory aid
A reliable way to remember which side records an increase:
- DEAD - Debit increases Expenses, Assets and Drawings.
- CLIC - Credit increases Liabilities, Income and Capital.
So when an asset, expense or drawings goes up, you debit; when a liability, income or capital goes up, you credit. To record a decrease, you use the opposite side.
Normal balances
The normal balance is the side on which an account usually has its balance, which is its increase side. Assets, expenses and drawings normally have debit balances; liabilities, income and capital normally have credit balances. This is why, when a trial balance is drawn up, the debit and credit columns should agree.
Examples in context
Example 1. Receiving money owed. A customer who bought on credit pays \600$ by cheque. Bank (asset) goes up, so it is debited; the customer's account (a receivable asset) goes down, so it is credited. The debit-credit rule for assets - up on debit, down on credit - handles both sides of this single event correctly.
Example 2. Recording an expense on credit. A business receives an electricity bill of \250$ but has not yet paid it. Electricity (expense) goes up, so it is debited; a payable (liability) is created, so it is credited. Even though no cash moves, the rules still apply: the expense is recognised and a liability recorded.
Try this
Q1. State which side increases each: an asset, a liability, an expense. [3 marks]
- Cue. Asset increases on the debit side; liability increases on the credit side; expense increases on the debit side.
Q2. Give the debit and credit for buying inventory of \1,500$ on credit from Tan. [2 marks]
- Cue. Debit Purchases \1,500\.
Q3. State the normal balance of capital and of rent expense, and explain why they differ. [3 marks]
- Cue. Capital has a normal credit balance because equity increases on the credit side; rent expense has a normal debit balance because expenses increase on the debit side.
Exam-style practice questions
Practice questions written in the style of SEAB exam questions on this dot point, with worked answer explainers. The year tag is the paper they imitate, not the source.
Original6 marksState the account to debit and the account to credit for each transaction: (a) the owner pays \15\,000\ on credit from Wong; (c) the business pays wages of \800$ in cash.Show worked answer →
(a) Owner pays in capital: an asset (bank) increases, equity (capital) increases.
Debit Bank \15,000\.
(b) Buy goods on credit: purchases increase, a liability (Wong, a payable) increases.
Debit Purchases \2,000\.
(c) Pay wages in cash: an expense (wages) increases, an asset (cash) decreases.
Debit Wages \800\.
Markers reward the correct debit and credit account for each, with the right amounts, recognising that an asset and an expense are debited when they increase, while a liability and capital are credited when they increase.
Original5 marksFor each account, state whether its normal balance is a debit or a credit and explain why: (a) trade receivables; (b) trade payables; (c) sales; (d) capital; (e) rent expense.Show worked answer →
| Account | Element | Normal balance | Why |
|---|---|---|---|
| Trade receivables | Asset | Debit | Assets increase on the debit side |
| Trade payables | Liability | Credit | Liabilities increase on the credit side |
| Sales | Income | Credit | Income increases on the credit side |
| Capital | Equity | Credit | Equity increases on the credit side |
| Rent expense | Expense | Debit | Expenses increase on the debit side |
Markers reward the correct normal balance for each account and a brief justification linking it to the element and the side on which that element increases.
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