Why learn the double entry system?
Ever wonder why accountants always talk about “debits” and “credits” like they’re two sides of the same coin? It’s the secret sauce that keeps every business’s books balanced.
💡 In Simple Words: Every transaction affects at least two accounts – one gets a value added (debit) and another gets a value taken away (credit). Think of it as a see‑saw: when one side goes up, the other must go down so the balance stays level.
What is the double entry system?
The double entry system is a method of recording financial events where each entry is entered twice: once as a debit and once as a credit. A debit (left side) means value is received or an expense is incurred, while a credit (right side) means value is given away or a revenue is earned. The total of all debits always equals the total of all credits, so the books stay in harmony.
Basic rules of debit and credit
- Assets (things the business owns, like cash or equipment) increase with a debit and decrease with a credit.
- Liabilities (what the business owes, like loans) increase with a credit and decrease with a debit.
- Equity (owner’s stake) follows the same rule as liabilities – increase with credit, decrease with debit.
- Expenses (costs incurred) increase with a debit and decrease with a credit.
- Revenue (money earned) increases with a credit and decreases with a debit.
Imagine water flowing through a pipe system. The pipe represents an account. Adding water (debit) to one pipe means the same amount must leave another pipe (credit) – the total water in the system never magically appears or disappears.
Step‑by‑Step recording process
When a transaction happens, follow these five moves:
- Identify the accounts involved.
- Decide which account gets a debit and which gets a credit.
- Write a journal entry – the first official record.
- Post the amounts to the ledger – the personal “bank statement” for each account.
- Check the trial balance – a quick sanity test that debits equal credits.
Worked example
Let’s say on 5 Sept your shop sells goods worth ₹2,000 cash.
- Identify accounts: Cash (an asset) and Sales Revenue (a revenue).
- Apply rules: Cash increases → debit. Sales Revenue increases → credit.
- Journal entry:
| Date | Account | Debit (₹) | Credit (₹) |
|---|---|---|---|
| 5‑Sep | Cash | 2,000 | |
| 5‑Sep | Sales Revenue | 2,000 |
Now post each line to the respective ledger pages. When you add up all ledger balances, the trial balance will show total debits = total credits = ₹2,000, confirming the entry is correct.
Quick summary
| Concept | Debit (+) | Credit (+) |
|---|---|---|
| Assets | Increase | Decrease |
| Liabilities | Decrease | Increase |
| Equity | Decrease | Increase |
| Expenses | Increase | Decrease |
| Revenue | Decrease | Increase |
📝 Likely Exam Questions
- State the basic principle of the double entry system.
Answer: Every transaction is recorded in at least two accounts, with equal total debits and credits, so the accounting equation stays balanced. - Explain how a cash purchase of office supplies for ₹5,000 is recorded.
Answer: Debit Office Supplies (asset) ₹5,000, Credit Cash (asset) ₹5,000. - What is the effect of receiving ₹10,000 from a customer on the Accounts Receivable account?
Answer: Debit Cash ₹10,000, Credit Accounts Receivable ₹10,000 – the receivable decreases, cash increases. - Why is a trial balance prepared after posting?
Answer: To verify that total debits equal total credits, ensuring no arithmetic or posting errors before preparing final statements. - List the five steps in the double entry recording process.
Answer: Identify accounts, determine debit/credit, record journal entry, post to ledger, prepare trial balance.