What Is a Trial Balance? How It Works and Why Your Books Need One (2026)

A trial balance is a report listing every account in your ledger, with its debit or credit balance. It exists to check one thing: that total debits equal total credits before you move on to the financial statements.

If the two columns don’t match, something in your bookkeeping is wrong, and you need to find it before going further. If they do match, that’s a good sign, though not a guarantee everything is correct.

For a closer look at a related topic, see our guide to What Is Depreciation? How It Works and How Businesses Calculate It (2026).

Quick Answer

A trial balance is an internal accounting report, not a financial statement itself. It lists every ledger account and its balance, then totals the debit and credit columns. A trial balance is usually prepared before the balance sheet and profit and loss statement, as a check that the books add up correctly.

What a Trial Balance Actually Shows

Every account in your general ledger gets a line: assets, liabilities, equity, revenue, and expenses. Each one carries either a debit or a credit balance, never both. The report simply adds up all the debit balances in one column and all the credit balances in another.

Under double-entry bookkeeping, every transaction touches at least two accounts, so the two columns should always land on the same total. That’s the entire logic of the trial balance in one sentence.

How to Prepare a Trial Balance

The process is simple once your ledger is up to date:

1. Close out the period. Post every transaction for the period you’re reporting on.
2. List every account. Pull the closing balance for each ledger account.
3. Sort into debit and credit columns. Assets and expenses sit in debit; liabilities, equity, and revenue sit in credit.
4. Total both columns. Add the debit column, then the credit column.
5. Compare the totals. They should match exactly. If they don’t, go back through the ledger for the error.

Unadjusted vs. Adjusted Trial Balance

There are two versions of this report, and they serve different points in the accounting cycle.

The unadjusted trial balance comes straight from the ledger, before any period-end adjustments. It’s the first checkpoint, catching basic entry errors early.

The adjusted trial balance comes after adjusting entries — accrued expenses, prepaid items, depreciation, and similar year-end corrections. This version feeds straight into the financial statements, so it needs to be right before anyone builds the balance sheet or income statement from it.

Trial Balance vs. Balance Sheet

These two get confused constantly, but they’re not the same thing.

• A trial balance is an internal working document, listing every account with a balance.
• A balance sheet is a formal financial statement, showing only assets, liabilities, and equity, in a set structure.

A trial balance is a step on the way to the balance sheet, not a replacement for it. No one outside the accounting team is meant to see a trial balance; a balance sheet, on the other hand, gets shared with lenders, investors, and the ATO.

What a Balanced Trial Balance Does Not Prove

Here’s the part that trips people up: a trial balance that balances is not proof your books are correct. It only proves debits equal credits. Several real errors can hide behind a perfectly balanced report:

• Error of omission. A transaction never got recorded at all, so both sides are simply missing.
• Error of commission. The right amount got posted, but to the wrong account.
• Error of principle. A transaction got recorded against the wrong type of account entirely, like treating a capital purchase as an expense.
• Compensating errors. Two separate mistakes cancel each other out by chance.

A trial balance is a useful first filter, then, but it’s not a substitute for a proper review of the entries themselves.

When Australian Businesses Actually Use One

Most small businesses prepare a trial balance at the end of each month, and again at the end of the financial year, which runs to 30 June in Australia. It’s the standard first step before an accountant or bookkeeper wraps up annual accounts, prepares a tax return, or matches figures for a Business Activity Statement.

Software now handles most of this on its own, making a trial balance right from the ledger. Even so, someone still needs to read it and check anything that looks off, rather than assuming a clean total means clean books.

Common Trial Balance Mistakes

A few patterns show up repeatedly:

• Treating a balanced report as a finished job. Balancing is the start of review, not the end of it.
• Skipping the adjusted version. Relying only on the unadjusted trial balance misses accruals and depreciation that belong in the period.
• Posting to the wrong account. This won’t break the balance, but it will throw off your real financial picture.
• Leaving it too late. Preparing a trial balance only once a year makes errors much harder to trace back to their source.

For related reading, see our guides to Low Doc Home Loans: What You Actually Need and What It Costs and When Can I Access My Super: Two Pathways Most Guides Blend Into One.

FAQ

Is a trial balance a financial statement?
No. It’s an internal working document used to check the ledger before the financial statements get prepared.

What happens if a trial balance doesn’t balance?
It means there’s an error somewhere in the ledger — a missing entry, a swapped number, or a posting to the wrong side of an account. You need to trace and correct it before moving forward.

What’s the difference between an unadjusted and adjusted trial balance?
The unadjusted version comes straight from the ledger. The adjusted version comes after year-end adjustments like accruals and depreciation, and it’s the one that feeds into the financial statements.

Can a trial balance be wrong even if it balances?
Yes. Errors of omission, commission, principle, and compensating errors can all hide behind a fully balanced report.

How often should a small business prepare a trial balance?
Monthly is common practice, with another one at financial year end. Waiting longer makes errors harder to trace.

Does accounting software still need a trial balance step?
Yes, even though the software generates it automatically. Someone still needs to review it, since the software can’t tell whether an entry landed in the right account.

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