Understanding the Trial Balance
A trial balance is one of the simplest yet most important reports in accounting. It lists every account in your general ledger along with its current debit or credit balance. The report has three columns: account name, debit balance, and credit balance. At the bottom, the total of all debit balances should equal the total of all credit balances. If they match, it confirms that for every debit entry recorded, a corresponding credit entry was also recorded, maintaining the fundamental balance of double-entry bookkeeping. A trial balance does not prove that all transactions were recorded correctly, only that the debits and credits balance. An error that debits and credits the wrong accounts by equal amounts will not show up on the trial balance.
Types of Trial Balances
There are three types of trial balances used at different points in the accounting cycle. The unadjusted trial balance is prepared after all regular transactions have been posted but before adjusting entries are made. It provides a starting point for the adjustment process. The adjusted trial balance is prepared after adjusting entries have been recorded and posted. This version reflects the true account balances for the period and is used to prepare the financial statements. The post-closing trial balance is prepared after closing entries have been posted, showing only permanent account balances. This confirms that all temporary accounts have been properly closed to zero and that the books are ready for the next accounting period.
How to Prepare a Trial Balance
Preparing a trial balance involves listing each general ledger account and recording its balance in either the debit or credit column. Asset and expense accounts normally have debit balances, so their balances go in the debit column. Liability, equity, and revenue accounts normally have credit balances, so their balances go in the credit column. After listing all accounts, add up each column. If the totals are equal, the trial balance is in balance. If not, you need to find and correct the error. Common causes of trial balance discrepancies include posting only one side of a journal entry, transposing digits, recording an entry in the wrong column, and mathematical errors. HelloBooks generates trial balances automatically and will alert you if the books are out of balance.
Limitations of the Trial Balance
While the trial balance is a useful verification tool, it has important limitations. A balanced trial balance does not mean all transactions are correct. Several types of errors will not cause the trial balance to be out of balance. These include errors of omission, where a transaction is completely left out. Errors of commission, where the correct amount is posted to the wrong account of the same type. Compensating errors, where two mistakes cancel each other out. Errors of original entry, where the wrong amount is recorded on both sides. Despite these limitations, the trial balance remains a valuable checkpoint in the accounting process because it catches many common mistakes and provides a comprehensive summary of all account balances in one report.