What is a Trial Balance?
A trial balance is a report listing every general ledger account with its closing debit or credit balance at a given date, used to verify that total debits equal total credits. It is the first checkpoint between bookkeeping and financial statement preparation, and a fundamental input to any audit.
How a trial balance is built
Each account's transactions are totalled, the closing balance is placed in the debit or credit column, and the two columns are summed. Under double-entry bookkeeping the totals must match, since every entry creates equal and opposite postings.
In practice three versions exist. The unadjusted trial balance is produced straight from the ledger. The adjusted trial balance follows period-end entries for accruals, depreciation, and provisions. The post-closing trial balance remains after temporary accounts are closed, containing only balance sheet accounts.
What a trial balance does and does not catch
It catches arithmetic and posting errors: a one-sided entry, a transposed figure in one leg, an amount posted twice to the same side. Any of these breaks the equality immediately, which is why the report retains its place in the close routine.
It misses everything that preserves balance. A transaction posted to the wrong account, an entire transaction omitted, a duplicate posted correctly on both sides, and compensating errors all leave a balanced trial balance. A balanced trial balance proves arithmetic consistency, not accuracy, and that distinction is where most misstatements live.
Trial Balance and Supervizor
A balanced trial balance says little about what is inside the accounts. Supervizor's audit analytics solution tests the underlying entries rather than the totals. Teams use it to:
- Detect misclassified entries posted to the wrong account despite balancing correctly
- Identify duplicate and unusual postings, including manual entries outside normal patterns
- Test the ledger behind the balance, covering every entry rather than reviewing account totals