Quick answer
A debit records an amount on the left side of an account; a credit records an amount on the right. Double-entry bookkeeping records every recognized transaction, adjustment, or other accounting event with equal total debits and credits so the accounting equation stays balanced.
Debit does not mean bad, money out, or decrease. Credit does not mean good, money in, or increase. The effect depends on the account’s class and normal balance.
Increases normal-debit accounts; decreases normal-credit accounts.
Increases normal-credit accounts; decreases normal-debit accounts.
A repeatable reasoning method
Memorizing entries without understanding the underlying event is unreliable. Work from the economic event to the account effects instead:
- Describe the event. State what the business received, gave up, earned, incurred, borrowed, or repaid.
- Identify the affected accounts. Use account names, not only broad categories such as “asset.”
- Classify each account. Decide whether it is an asset, liability, equity, revenue, expense, or owner-distribution account.
- Decide whether each account increases or decreases. Keep this economic direction separate from debit and credit for the moment.
- Apply the normal-balance rule. An increase occurs on the normal side; a decrease occurs on the opposite side.
- Check the complete story. Total debits must equal total credits, and the chosen accounts, date, amount, and period must faithfully represent the event.
Example: supplies bought on account
Receive $2,400 of supplies and agree to pay later
Maple Tech receives supplies now. The vendor invoice is payable in 30 days; no cash changes hands on the purchase date.
- Supplies increases. It is an asset with a normal debit balance.
- Accounts Payable increases. It is a liability with a normal credit balance.
- Debit Supplies and credit Accounts Payable for the same amount.
| Account | Debit | Credit |
|---|---|---|
| Supplies | 2,400 | |
| Accounts Payable | 2,400 |
Why the supplies entry balances
| Statement | Account | Effect | Timing |
|---|---|---|---|
| Balance sheet | Supplies | Assets increase by $2,400 | Purchase date |
| Balance sheet | Accounts Payable | Liabilities increase by $2,400 | Purchase date |
| Income statement | Expense | No immediate effect while the supplies remain unused | Recognized as supplies are consumed |
Example: two assets can change
Maple Tech pays $12,000 cash for equipment. Equipment increases and Cash decreases. Both accounts are assets, so total assets do not change:
| Account | Debit | Credit |
|---|---|---|
| Equipment | 12,000 | |
| Cash | 12,000 |
Equipment increases on the debit side. Cash decreases on the credit side. Equal debits and credits record a change in the asset mix—not an immediate reduction in equity.
Double-entry can have more than two lines
“Double-entry” means every transaction has balanced debit and credit effects. It does not mean every entry has exactly two lines. A compound entry may debit or credit several accounts as long as the totals remain equal and each line represents part of the same event.
Balance is necessary, but not sufficient
Equal totals prove only arithmetic balance. An entry can balance while using the wrong account, recording the wrong amount on both sides, duplicating revenue, or placing the event in the wrong period. Always check whether the entry faithfully records what increased, what decreased, and why.
Common misconceptions
- “Debit means cash came in.” A cash receipt usually debits Cash, but many debits do not involve cash and a credit can also reduce Cash.
- “My bank credited me, so credit means increase.” A bank statement is written from the bank’s perspective. Your deposit is the bank’s liability to you, so the bank credits its liability account.
- “If it balances, it is correct.” Balance does not validate the account choice, timing, measurement, or business purpose.