What Is a Trial Balance? Definition and Purpose

By Markets & Investing DeskUpdated Nov 10, 2026

Definition

A trial balance is an internal accounting report that lists every general ledger account's ending balance in debit and credit columns to confirm that total debits equal total credits.

Key takeaways

A trial balance lists each ledger account's closing balance and proves that debits equal credits.
Three versions appear in the accounting cycle: unadjusted, adjusted and post-closing.
Equal totals prove only mathematical equality, not error-free books.
It is an internal working document, not a published financial statement.

A trial balance is an internal accounting report that lists every general ledger account with its ending balance, debit balances in one column and credit balances in another, to confirm that total debits equal total credits at a specific date. It is a check on the arithmetic of double-entry bookkeeping. Accountants prepare it at the end of a reporting period, before the financial statements, so that posting and addition errors are found while they are still easy to trace.

How a Trial Balance Works

Under double-entry accounting, every transaction is recorded with at least one debit and at least one credit of equal total value. A $2,000 cash sale, for example, debits Cash by $2,000 and credits Sales Revenue by $2,000. If every entry follows this rule and is posted correctly, the sum of all debit balances across the ledger must equal the sum of all credit balances.

To build a trial balance, the accountant:

Totals the debits and credits posted to each general ledger account during the period, together with its opening balance.
Nets them to find the account’s ending balance and whether that balance sits on the debit or credit side.
Lists each account title (often with its account number from the chart of accounts) on the far left, the debit balance in the left money column and the credit balance in the right money column.
Adds each column separately and compares the two totals.

Normal balances

Knowing which side each account usually falls on makes a trial balance easier to read and errors easier to spot:

Debit balances: assets, expenses, losses, and owner drawings or dividends.
Credit balances: liabilities, equity (including retained earnings), revenue and gains.

Contra accounts reverse the pattern: accumulated depreciation reduces an asset but carries a credit balance. An account on its unexpected side, such as Cash with a credit balance, is not automatically wrong (an overdraft can cause it), but it is worth investigating.

Example of a Trial Balance

The following is a hypothetical trial balance for a small services company, Maple Design Studio, at December 31.

Account	Debit ($)	Credit ($)
Cash	12,000
Accounts receivable	4,500
Equipment	18,000
Accounts payable		2,500
Bank loan		10,000
Common stock		15,000
Retained earnings		8,500
Dividends	3,000
Service revenue		31,000
Salaries expense	22,000
Rent expense	6,000
Utilities expense	1,500
Total	67,000	67,000

Both columns total $67,000, so the ledger is in balance arithmetically. Suppose instead that a $900 utilities bill had been posted as a credit to Accounts Payable but never debited to Utilities Expense. The credit column would then exceed the debit column by $900, and the accountant would search for a one-sided entry of that amount.

Interpreting a difference

When the totals do not match, the size of the gap often points to the type of mistake:

Difference equals one transaction amount: an entry was posted to only one side.
Difference is twice an amount: a debit was posted as a credit (or the reverse). Halving the difference gives the amount to look for.
Difference divisible by 9: a transposition error, such as $5,400 recorded as $4,500, or a misplaced decimal point.
Difference of a round figure such as 10, 100 or 1,000: often an addition error in one of the column totals.

Why a Trial Balance Is Important

Catching errors at this stage matters: fixing a missed posting in the ledger is far simpler than restating a report already issued to owners, lenders or tax authorities.

The trial balance is also the bridge between the ledger and the statements. Revenue, expense, gain and loss balances from the adjusted trial balance feed the income statement, while asset, liability and equity balances feed the balance sheet. Because it gathers every account on one page, it gives accountants and auditors a starting map of the ledger. There are no fixed rules on frequency: many companies run one monthly or quarterly as well as at year end, and accounting software can generate one for any date.

The Three Types of Trial Balance

Unadjusted trial balance. Prepared from the ledger after routine transactions are posted, before adjusting entries, to confirm that the day-to-day postings balance.

Adjusted trial balance. Prepared after adjusting journal entries for items such as accrued expenses, unearned revenue, prepaid expenses and depreciation. It holds the final balances for the period and is the version used to prepare the financial statements.

Post-closing trial balance. Prepared after closing entries transfer revenue, expense and dividend balances into retained earnings. Only permanent (balance sheet) accounts remain, and these balances become the opening position for the next period.

Limitations of a Trial Balance

A balanced trial balance does not mean the books are free of mistakes. It cannot detect any error that affects debits and credits equally. The common categories are:

Errors of omission: a transaction is never recorded, so neither side changes.
Errors of commission: the right amount goes to the wrong account of the same type, such as posting a payment from one customer to another customer’s receivable.
Errors of principle: a transaction is recorded in the wrong class of account, such as booking an equipment purchase as a repairs expense.
Compensating errors: two separate mistakes of equal size cancel each other out.
Errors of original entry: the wrong amount is recorded on both sides from the start.
Reversal of entries: the correct accounts are used but the debit and credit are swapped.

For this reason the trial balance is used alongside other controls, including account reconciliations (matching cash to bank statements and receivables to customer records), review of supporting documents and, for many companies, an external audit.

Trial balance vs. balance sheet. A balance sheet is a formal financial statement of assets, liabilities and equity at a point in time, prepared under accounting standards and often shared with investors, lenders and regulators. A trial balance is an internal working document with no prescribed presentation, and it also lists revenue and expense accounts that do not appear on the balance sheet. The balance sheet is built from the trial balance, not the other way around.

Trial balance vs. general ledger. The general ledger records every individual transaction posted to each account, with dates and references. The trial balance shows only each account’s ending balance. When a trial balance is out of balance, accountants go back to the general ledger to find the faulty posting.

Trial balance vs. income statement. The income statement reports revenue and expenses for a period and arrives at net income. The trial balance contains those same accounts but does not compute profit; it simply proves the ledger’s debits and credits agree.

FAQs

Is a trial balance prepared as of a date or for a period?

As of a date. The heading reads, for example, "Trial Balance, December 31." Balance sheet accounts show cumulative balances at that date, while revenue and expense accounts show amounts accumulated since the start of the current fiscal period, because they were reset to zero at the last closing.

Who prepares and can access the trial balance?

The bookkeeper, accountant or controller usually prepares it. Access is typically limited to finance staff, management and the company's auditors, although lenders or tax advisers may request a copy.

The Bottom Line

Accountants preparing period-end financial statements use a trial balance to catch posting and addition errors while they are still easy to trace. Matching totals confirm only that the ledger's arithmetic agrees, since omissions, wrong-account postings and compensating errors can still hide in balanced books. The trial balance works best alongside account reconciliations, review of supporting documents and, for many companies, an external audit.