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Bookkeeping › Trial Balance

Why do assets and expenses have debit balances while income, liabilities, and capital have credit balances?

Intermediate

Answer

Because of how double entry increases each: assets and expenses increase with debits (so their balances are usually debit); income, liabilities, and capital increase with credits (so their balances are usually credit). This pattern drives which trial balance column each account falls into.
Real-world example Purchases (expense) sits as a debit; sales (income) sits as a credit in the trial balance.

Common follow-ups: What increases an expense account? | Why is capital a credit balance?