A credit balance is the balance that appears on the right-hand, or credit, side of a general ledger account, under the double-entry bookkeeping convention where every account has a left side for debits and a right side for credits. Whether a credit balance is the expected, normal state of a given account, or a sign that something unusual has happened, depends entirely on what type of account is being looked at.
Accounts that normally carry a credit balance
Liabilities, owner's or stockholders' equity, and revenue accounts all normally carry credit balances: an increase to accounts payable, to retained earnings, or to a sales account is recorded as a credit, and a decrease is recorded as a debit, which draws the balance down toward zero. This is the opposite of how asset and expense accounts behave, where a debit increases the balance and a credit decreases it.
When a credit balance signals something unusual
An asset account such as Cash or inventory is not expected to carry a credit balance under normal circumstances, since assets normally run debit balances; a credit balance showing up in Cash, for instance, typically indicates an overdrawn bank account rather than a genuine negative amount of physical cash, and a bookkeeper encountering an unexpected credit balance in what is usually a debit-balance account treats it as a signal worth investigating rather than ignoring.
Credit balances and contra accounts
Some accounts are deliberately designed to carry a balance opposite to their category's normal balance, and these are called contra accounts — a contra asset account such as accumulated depreciation intentionally carries a credit balance even though it is classified as part of the asset section, specifically because its purpose is to reduce the net amount the related asset account reports.
Why understanding credit balances matters for reading a trial balance
Anyone reviewing a trial balance needs to recognize which accounts are expected to show credit balances and which are expected to show debit balances, since the whole point of preparing a trial balance is to confirm that total debits equal total credits across the entire general ledger. A credit balance appearing in an account where a debit balance would normally be expected, outside of the known exceptions like contra accounts, is one of the first things a bookkeeper or auditor flags for further investigation when reviewing a company's books.
A simple illustration
A company’s Accounts Payable account, which normally carries a credit balance representing what the company owes suppliers, would show an unusual debit balance if the company accidentally overpaid a supplier, since the overpayment effectively turns the liability into a receivable from that supplier until the excess is refunded or applied to a future bill. Spotting an account carrying a balance on the side opposite its normal expectation is one of the simplest and most effective checks a bookkeeper can run while reviewing a trial balance for errors.
Credit balances across the major account categories
Beyond liabilities, equity, and revenue, gain accounts also normally carry credit balances, since a gain increases net income in the same direction revenue does. Keeping a mental map of which broad categories run credit balances versus debit balances is one of the first skills a new bookkeeper develops, since it underlies every journal entry made from that point forward.