Trial balance: how to read it and use it to review your accounts

Quick answer. The trial balance is the statement that summarises, for each account in the chart of accounts, total debits, total credits and the resulting balance. Its first control rule: the sum of debit balances equals the sum of credit balances. It is the upstream working document for the balance sheet, structured under the French chart of accounts (ANC regulation no. 2014-03 of 5 June 2014).

The trial balance is a table that lists every account moved over a period, with, for each one, cumulative debits, cumulative credits and the resulting balance. Where the general ledger unrolls every entry line by line, the trial balance condenses: one line per account, one balance per account.

It is not a standalone legal requirement, but it flows directly from documents that are. Article L123-12 of the French Commercial Code requires chronological recording of transactions and the preparation of annual accounts at the close. Articles R123-173 and R123-176 make the journal-book and the general ledger mandatory. The trial balance is simply the arithmetic synthesis of that ledger: it proves that entries balance before you build your balance sheet.

Its first purpose is an equilibrium check. In double-entry bookkeeping, each entry debits one account and credits another for the same amount. Mechanically, the sum of all debit balances must equal the sum of all credit balances. If the two totals differ, an entry is unbalanced: the trial balance flags the problem without yet locating it. That property makes it the starting point of any accounts review by cycle.

The confusion is common. The general trial balance shows the accounts of the chart of accounts, identified by multi-digit numbers (411 Customers, 401 Suppliers, 512 Bank, and so on). The auxiliary balance breaks down a collective third-party account into as many sub-accounts as there are customers or suppliers. Account 411 in the general balance shows only an overall figure; the auxiliary balance tells you who owes what.

The two documents are connected: the total of the customer auxiliary balance must match, to the cent, the balance of account 411 in the general balance. A gap between the two is an anomaly calling for immediate investigation. It is on the auxiliary balance, too, that the matching of third-party accounts takes place.

The aged balance is a variant of the auxiliary balance that splits customer or supplier balances by age: not yet due, under 30 days, 30 to 60 days, over 90 days. It is the prime tool for steering unpaid invoices.

Reading a balance is not about scanning lines top to bottom, but about questioning each balance against what it should be. Here is the sequence we apply in our bookkeeping files.

1. Check overall equilibrium. The sum of debit balances must equal the sum of credit balances. A gap, even of one euro, forbids going further before correction.
2. Control the sign of each balance by class. A supplier account (401) in debit or a bank account (512) contradicting the statement are warning signals.
3. Reconcile balances against supporting documents. The 512 balance is reconciled with the bank statement, the 445 balance with the VAT return, the 421 balance with the payroll journal.
4. Isolate suspense accounts. Accounts 471 to 478 must be cleared to zero at the close: any residual balance is an unallocated entry.
5. Examine abnormal variations. A line that doubles or collapses against the prior year deserves a documented explanation.
6. Carry anomalies into the review file. Every unjustified balance becomes an action item to handle before the balance sheet.

Each account class has an expected sign of balance. The strength of the trial balance is that an anomaly shows first through the sign of the balance, even before you look for the amount. An income account (class 7) in debit or an expense account (class 6) in credit is almost always the symptom of a posting error.

The French chart of accounts organises accounts into homogeneous classes, which makes this reading systematic. Here are the usual balance signs and their warning signals.

The underestimated risk lies in suspense accounts. A balance lingering in account 471 is not a neutral grey zone: it often masks an unidentified receipt, mis-allocated VAT or income that should appear in the income statement. Cleared too late, it distorts the result and the VAT declared.

The trial balance is the pivot between routine bookkeeping and the production of annual accounts. You do not build a balance sheet from scattered entries: you start from a balanced, controlled trial balance whose every significant balance has been justified. This is exactly the logic of the bookkeeping and accounts review engagement we run.

In practice, the balance connects to other documents. The 512 balance is tested through bank reconciliation. Third-party balances are validated by matching the auxiliary balance. Class 6 and 7 accounts, once cleared of prepaid expenses and deferred income, feed the result. And once you know how to read a balance sheet, you understand that each balance-sheet line is merely the aggregation of trial-balance figures.

The trial balance also precedes the year-end inventory entries: depreciation, provisions, inventory, accruals. A sound balance before inventory avoids building closing entries on false foundations.

Depending on your legal form and activity, certain accounts call for heightened vigilance.

• Company subject to corporate income tax (SASU, SARL, SAS). A shareholder current account (455) in debit may characterise an irregular advance to the director. At the close, the trial-balance result determines the corporate tax base, whose reduced 15% rate applies to profits up to 42,500 euros for eligible companies.
• Liberal professions under BNC. On a cash basis the logic differs, but liberal professions that keep accrual accounting face the same third-party accounts to control.
• High-cash-volume businesses. In hospitality or retail, the cash account (53) must never be in credit: a negative balance reveals unrecorded income or an unjustified cash outflow.
• Micro-enterprise. The micro regime exempts you from full accrual accounting; there is therefore no trial balance as such, only a receipts book.

The quality of the trial balance hinges on details many directors overlook until an audit.

What the tax authority looks at is the consistency between the trial balance and the accounting records file. Every business keeping computerised accounts must be able to hand over its accounting records file (FEC): it contains 18 fields defined by the decree of 29 July 2013 and article A47 A-1 of the French tax procedures code. A trial balance that cannot be rebuilt from the FEC is a red flag.

Three prudence reflexes to keep before each close:

• Clear suspense accounts before inventory, never after. An un-cleared 471 account distorts the taxable result.
• Watch the limitation period on old receivables. Article L110-4 of the Commercial Code sets a five-year window to act between merchants: an unmatched receivable left dormant too long can become legally irrecoverable.
• Do not provide for or write off a receivable without evidence. Reclaiming the VAT collected on a receivable that has become irrecoverable requires, under article 272 of the French tax code, proving its definitively irrecoverable nature.

Recently, the director of a professional-services company sought us out because his result seemed inconsistent with his real activity. Rather than opening the balance sheet, we started with the trial balance. Within minutes, two anomalies surfaced: a suspense account 471 carrying several thousand euros of receipts never allocated, and a 411 account whose auxiliary balance did not tie to the general balance.

The rework explained everything. The suspense-account sums corresponded to services invoiced and collected, but never recorded as income: the result was understated and the VAT collected incomplete. The gap on account 411 came from payments allocated to the wrong customer. Once the balance was cleaned up, the result became readable and defensible.

That is the whole point of this document. The trial balance is not an administrative by-product you print at year-end. It is the dashboard of how reliable your accounts are, the filter every anomaly passes through before the balance sheet. A balance read regularly, not only at the close, catches errors while they still cost little to fix. This is a requirement we uphold, as a chartered accountancy firm in Paris 8e registered with the French Institute of Chartered Accountants, across all our files. And when a statutory audit engagement steps in, an already-justified balance spares you from explaining after the fact balances you could have checked yourself.

Hayot Expertise tip. Do not reserve the reading of the trial balance for the close. A monthly review, backed by tools such as Pennylane or document capture through Dext, turns the balance into an early warning signal. The sooner an anomaly is spotted, the less it costs to fix and the calmer your close.