What it means
Think of the general ledger as the master filing system for a company's money. It contains an account for each type of asset, liability, equity item, revenue and expense, such as cash, accounts receivable, rent expense and sales.
Each transaction is recorded as at least two entries, a debit and a credit, which always balance. Day-to-day activity is first captured in sub-ledgers or journals, such as the sales ledger, purchases ledger and payroll records.
Summary totals or individual entries are then posted to the general ledger. This design keeps detail in the sub-ledgers and gives the general ledger a complete, high-level picture.
At the end of each period, the accounts are totalled in a trial balance, which lists every account balance and checks that total debits equal total credits. The trial balance is then used to prepare the income statement, balance sheet and cash flow statement.
If the debits and credits do not match, there is an error to be found before any reports are produced. Modern accounting software maintains the general ledger automatically, and a chart of accounts defines which accounts exist and how they are numbered.
A well-designed chart of accounts makes reporting easier, while a messy one leads to inconsistent coding and unreliable numbers. Access controls and audit trails record who posted or changed each entry.
Auditors rely heavily on the general ledger. They test samples of entries, review journal entries made at the period end and examine unusual or manual adjustments, which are a common area for errors or manipulation.
Keeping supporting documents and clear descriptions for each entry makes that review quicker. The general ledger also supports management reporting.
Accounts can be tagged by department, project or location, so that managers can see their own results without waiting for a separate report. Good tagging at the point of posting saves hours of analysis later.
In practice
Real-world examples
Example 1
A retailer records a $1,200 sale as a debit to cash and a credit to sales revenue. Both entries sit in the general ledger and feed directly into the income statement. The same sale will later appear in the sales ledger as a specific customer's invoice.
Example 2
A company pays its monthly rent of $4,000 and records a debit to rent expense and a credit to cash. At month end, the accountant reviews the rent expense account to confirm it matches the lease. Any difference between the ledger and the lease would be investigated and corrected.
Example 3
An auditor reviewing a manufacturer's year-end accounts selects manual journal entries posted on the last day of the year. She asks for supporting documents for each, because late adjustments are a classic risk area. This kind of testing helps ensure that results have not been adjusted just to meet a target.
Think of it
The general ledger is like a master file that keeps track of everything-every dollar that came in, went out, or moved between accounts.
Formula
Calculation
Closing balance of an account that normally carries a debit balance = Opening balance + Debits - Credits
Total debits in the ledger = Total credits in the ledger
In the general ledger of Delta Hardware, a fictional shop, the cash account opens the month with $50,000. During the month, debits for cash received total $30,000 and credits for cash paid total $20,000. The closing balance is $50,000 + $30,000 - $20,000 = $60,000. If the trial balance shows total debits of $480,000 and total credits of $480,000, the ledger is in balance.Case study
Seen in the real world
Maple Leaf Catering is an illustrative, fictional business that tracked sales and expenses in several spreadsheets. When the owner asked a lender for a loan, the bank asked for a general ledger and trial balance, and the owner could not produce either.
An accountant rebuilt the books from bank statements and invoices, setting up a chart of accounts and posting every transaction to a proper ledger. The exercise took three weeks and uncovered $14,000 of expenses that had not been recorded, which reduced profit but gave a more accurate picture.
In the illustrative result, the lender accepted the new accounts and offered a loan on better terms because the figures were reliable. The owner kept the general ledger up to date monthly, and no longer had to guess how the business was performing. The owner now reviews the trial balance every month, treating it as a health check on the whole business.
Watch out
Common mistakes
- Posting a one-sided entry, which unbalances the ledger and breaks the trial balance.
- Using too many or poorly defined accounts, which leads to inconsistent coding.
- Allowing manual journal entries without review or support, which opens the door to error and fraud.
Questions
People also ask
What is the difference between a general ledger and a journal?
A journal records transactions in date order as they happen, while the general ledger groups them by account.
What is a trial balance?
It is a list of all ledger account balances at a point in time, used to check that debits equal credits.
What is a sub-ledger?
It is a detailed record, such as accounts receivable by customer, that is summarised in a control account in the general ledger.
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