What is a General Ledger (GL)?

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The general ledger (GL) is the complete record of every financial transaction in a business, organised by account. It is the central data store from which all financial statements are produced — every figure on the income statement, balance sheet, and cash flow statement traces back to an entry in the general ledger.

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The GL sits at the heart of any ERP system. When a sale is recorded, a payment is made, an asset is depreciated, or an accrual is posted, the corresponding entry lands in the general ledger.

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Why the general ledger matters

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The GL is the authoritative source of financial truth for a business. If the GL is accurate — meaning every transaction is recorded correctly, in the right period, to the right account — the financial statements will be accurate. If the GL contains errors, duplicates, or missing entries, every downstream report is wrong.

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For this reason, maintaining the integrity of the GL is the primary objective of the financial close process. Reconciliation, journal entry review, and period-end adjustments all exist to ensure the GL reflects economic reality before statements are produced and signed off.

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How the general ledger works

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The GL is organised around a chart of accounts — a structured list of every account the business uses to categorise transactions. Accounts are grouped into assets, liabilities, equity, revenue, and expenses.

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Every transaction posted to the GL follows double-entry bookkeeping: a debit to one account and a credit to another, with both sides equal. This ensures the accounting equation (assets = liabilities + equity) always holds.

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Subledgers — accounts receivable, accounts payable, fixed assets, inventory — capture transaction-level detail and summarise into the GL via control accounts. Reconciling subledgers to the GL is a core close activity.

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The GL and financial close

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At period end, the GL is the final destination for all financial data. Before close can be completed, the GL must be verified: all transactions are in the right period, all subledgers agree with their control accounts, all reconciling items are investigated, and all required journal entries have been posted and approved.

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Once close is signed off, the period is locked in the GL — preventing any further postings — and financial statements are extracted.

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GL vs ERP

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The GL is a component within an ERP system, not a standalone product. SAP, Oracle, NetSuite, Microsoft Dynamics, and similar platforms all include a general ledger module as their financial backbone. The GL module is where the chart of accounts is maintained, journal entries are posted, and period-end locks are applied.