What is a General Ledger?
The General Ledger is the central repository of all your financial data. Every transaction from every source ultimately flows into the general ledger, organized by the accounts in your chart of accounts.
Why the General Ledger Matters
The general ledger is the source of truth for financial reporting. Your income statement, balance sheet, and cash flow statement all derive from general ledger data. If the ledger is wrong, everything built on it is wrong.
For founders using accounting software like QuickBooks, the general ledger runs in the background. But understanding it helps you troubleshoot discrepancies and verify that categorization is correct.
Ledger Integrity
The general ledger must always balance. Every transaction has equal debits and credits. When it does not balance, something is wrong that needs investigation.
Formula
Every transaction has two sides:
Debit (left side) = Credit (right side)
The sum of all debit balances must equal the sum of all credit balances
Example
When a customer pays $1,000 for a SaaS subscription:
- Debit: Cash account increases by $1,000
- Credit: Deferred Revenue increases by $1,000
As each month passes ($1,000 ÷ 12 = $83.33):
- Debit: Deferred Revenue decreases by $83.33
- Credit: Subscription Revenue increases by $83.33
Both entries balance, and the ledger stays in equilibrium.