Double-entry bookkeeping records each transaction with equal total debits and credits. The difficult part is deciding which accounts change. Start there before trying to remember a journal entry.
Double-entry bookkeeping: use account types instead of cash shortcuts
An increase in an asset or expense is normally a debit. An increase in a liability, capital or income is normally a credit. Reductions go on the opposite side. “Debit means money in” is unreliable because a debit can increase an expense or reduce a liability.
For every transaction, write three things: the accounts affected, whether each increases or decreases, and the amount. Only then decide the debit and credit. All examples below ignore tax and use PKR for illustration.
Four transactions worked through
| Transaction | Debit | Credit |
|---|---|---|
| Owner puts PKR 100,000 into the business bank account | Bank 100,000 | Capital 100,000 |
| Office stationery of PKR 4,000 is bought on credit and treated as an expense | Stationery expense 4,000 | Trade payables 4,000 |
| A service is provided on credit for PKR 12,000 | Trade receivables 12,000 | Service income 12,000 |
| The stationery supplier is paid PKR 4,000 | Trade payables 4,000 | Bank 4,000 |
The last entry is where beginners often hesitate. Paying a supplier reduces the liability, so trade payables is debited. Bank is credited because the business’s bank asset decreases. There is no second stationery expense: it was already recognised when the credit purchase was recorded.
Separate the sale from the collection
When the service customer later pays PKR 12,000, debit bank and credit trade receivables. The payment converts a receivable into cash. Crediting income again would count the same service twice.
The distinction matters when answering questions quickly. Ask whether the transaction creates an amount owed or settles an amount already recorded. Similar-looking cash movements can have different entries.
Try this without looking at the table
A business pays PKR 3,500 electricity expense from its bank account. Later it receives PKR 8,000 from a customer whose credit sale has already been recorded. Write both entries before reading on.
Answer: debit electricity expense 3,500 and credit bank 3,500. For the customer receipt, debit bank 8,000 and credit trade receivables 8,000. If you credited sales on the second entry, revise the difference between a credit sale and its settlement.
A balanced entry can still be wrong
Debiting motor expenses instead of stationery expense would still leave debit and credit totals equal. A trial balance checks arithmetic agreement, not the correctness of every classification. Good bookkeeping also needs source documents and review.
For guided lessons and practice, explore the FA1 course. The official FA1 syllabus sets out the learning outcomes to use when planning revision.
Frequently asked questions
Does debit always mean money coming in?
No. Debit identifies a side of an account. Its effect depends on the account type; an expense can be debited without money entering the business.
Why do debit and credit totals match?
Each transaction is recorded with equal total debits and credits. This preserves the accounting equation, although matching totals do not prove that the correct accounts were used.
Continue your study
- Trial Balance Errors: What Agreement Does and Does Not Prove
- Invoices, Credit Notes and Discounts: Follow the Document Before the Entry
Connect every entry to the accounting equation
The accounting equation is assets equals liabilities plus capital. It helps explain why a transaction has more than one effect. When the owner invests PKR 100,000, bank increases and capital increases by the same amount. When the business buys equipment for PKR 25,000 using its bank account, one asset increases while another decreases. Total assets remain unchanged at that moment; the business has exchanged cash for equipment.
Expenses and income affect the owner’s interest through profit. An electricity expense reduces profit, while service income increases it. This does not mean every expense is posted straight to the capital account. Separate income and expense accounts allow the business to measure performance before the resulting profit is reflected in equity. Keep the account classification separate from the wider effect on the equation.
A complete practice scenario, including drawings and a loan
Imagine a small tutoring business starting with no balances. The owner contributes PKR 80,000 to bank. It receives a bank loan of PKR 20,000, buys equipment for PKR 30,000 through bank, earns PKR 15,000 for services paid immediately, and pays rent of PKR 6,000. Finally, the owner withdraws PKR 4,000 for personal use. Assume all transactions occur in one period and ignore depreciation and tax for this exercise.
The contribution is debit bank and credit capital for PKR 80,000. The loan is debit bank and credit loan payable for PKR 20,000. Borrowing is not sales income: the business has an obligation to repay the lender. The equipment purchase is debit equipment and credit bank for PKR 30,000. Equipment is an asset in this example, rather than an immediate rent or stationery expense.
The service receipt is debit bank and credit service income for PKR 15,000. Rent is debit rent expense and credit bank for PKR 6,000. The personal withdrawal is debit drawings and credit bank for PKR 4,000. Drawings are not wages or a business operating expense. Labelling a personal withdrawal as an expense would understate the profit earned from the business’s activities.
Now check the ending bank balance: 80,000 plus 20,000 minus 30,000 plus 15,000 minus 6,000 minus 4,000 equals PKR 75,000. Equipment is PKR 30,000, so total assets are PKR 105,000. The loan liability is PKR 20,000. Closing owner’s capital is the initial PKR 80,000 plus profit of PKR 9,000 minus drawings of PKR 4,000, giving PKR 85,000. Assets of PKR 105,000 equal liabilities of PKR 20,000 plus capital of PKR 85,000.
Why a payment is not always an expense
Compare paying rent, buying equipment and repaying the principal of a loan. All three reduce bank. Their debit entries differ because the purpose differs. Rent creates an expense, equipment creates an asset, and loan principal repayment reduces a liability. In double-entry bookkeeping, the bank statement alone identifies the cash movement; supporting documents explain which other account should be used.
If a loan instalment includes both principal and interest, split it using the information provided. For example, a PKR 5,000 payment containing PKR 4,500 principal and PKR 500 interest would debit loan payable 4,500, debit interest expense 500 and credit bank 5,000. Total debits still equal total credits. Double entry can involve three or more accounts; it does not require exactly two account names.
Use source documents and software carefully
For reliable double-entry bookkeeping, before entering a purchase, check the supplier, date, description and amount. Determine whether it is a new invoice, a credit note or settlement of an existing balance. Entering the same invoice twice creates two balanced postings and can overstate both expense and payables. A balanced system therefore still needs duplicate checks, document references and reconciliations.
Double-entry bookkeeping software may generate the other side of an entry when you choose a transaction type. You still need to understand the result. Selecting a cash sale instead of a customer receipt can record income twice. Review the customer balance and account allocation rather than assuming that an accepted software entry must be correct. ACCA’s explanation of computerised accounting systems connects these bookkeeping principles with digital records.
A practical revision routine for FA1
Practise double-entry bookkeeping with short mixed transactions instead of repeating only cash purchases. Include owner investment, credit sales, supplier settlement, borrowing and drawings. Cover the answer, name the accounts and explain the direction of change aloud. Then write the entry and verify the amounts. If you make a mistake, record the reason: account type, timing, business versus personal use, or arithmetic.
Return to the same question a day later without reading your previous answer. The aim of double-entry bookkeeping practice is to explain why the entry works, not merely recognise a familiar table. Before moving on, make sure you can distinguish a new sale from a receipt, a new purchase from a payment, and an expense from an asset. These distinctions make later reconciliation and trial balance questions easier to understand.