Which Thai companies must have audited financial statements?

Every company limited registered in Thailand is required to have each year's accounts examined and signed off by a certified public accountant, approved at an ordinary shareholders' meeting held within four months of the financial year end, and submitted to the Department of Business Development. There is no small-company exemption from the audit itself, though smaller entities may use simplified reporting standards.

If you prepare our books, can you also sign the audit?

No, and you should be cautious of any arrangement where one party does both. Auditor independence rules prohibit the CPA who signs the opinion from having prepared the accounting records. Our role is to make your books audit-ready and to liaise with your appointed auditor; the opinion itself always comes from an independent CPA.

How long does a Thai statutory audit take?

Fieldwork for a straightforward SME typically runs one to three weeks once the closing schedules are complete. Delays almost always come from missing reconciliations or unlocated supporting documents, which is why the pre-audit preparation matters more than the fieldwork itself.

What does audit support cost?

The fee depends on transaction volume, the state of the current-year books and how much correction the prior periods need. Send the latest trial balance and we reply with a written scope and fee — the review itself is free of charge.

English desk

Audit support and audit-ready books in Thailand

The statutory audit in Thailand is performed by an independent CPA — that independence is a legal requirement, so the firm keeping your books cannot sign the opinion. What we provide is everything around the audit: closing schedules in the format the auditor expects, reconciled balances, supporting documents filed and indexed, and answers to the CPA's queries without the owner translating between two parties.

Request a written quote contact@thailaw-accounting.co.th

Phone +66-94-895-8999 · LINE and email accepted in English.

What this service covers

Closing schedule package

Fixed asset register, accruals, prepayments, provisions, related-party balances and bank confirmations prepared before the auditor's fieldwork starts, not during it.

Reconciled trial balance

Every balance-sheet account reconciled to evidence — bank statements, supplier statements, inventory counts — so the audit samples confirm rather than discover.

Auditor query handling

The CPA's information request list is answered by the team that prepared the books, with a log of what was sent and what remains open.

DBD and Revenue filing after sign-off

Once the opinion is signed, the statements are filed with the Department of Business Development and the annual corporate return is reconciled to them.

How the engagement runs

1. Pre-audit health check
Before the auditor arrives we review the accounts that usually generate adjustments — VAT suspense, director loans, unreconciled bank lines — and correct them in the books first.
2. Schedule preparation
Closing schedules are built to the auditor's expected format, so fieldwork is verification rather than reconstruction.
3. Fieldwork support
Queries are answered within agreed turnaround, and any proposed adjustment is explained to the owner in plain language before it is accepted.
4. Filing and next-year setup
Audited statements go to the DBD, the tax return is tied to them, and recurring audit findings are fixed in the monthly process so they do not repeat.

Deadlines, rates and filing formats change. Confirm current requirements with the Revenue Department, the Social Security Office and the Department of Business Development, or ask us to confirm them for your case before you rely on a date.

Common situations we are hired for

First audit after incorporation

Even a dormant first year requires audited statements. We prepare a clean opening set so the company's first audit establishes a reliable baseline.

Audit qualification or emphasis of matter last year

We work through the qualification point, rebuild the underlying records where possible, and document the position for the coming audit.

Group reporting deadlines

When an overseas parent needs audited Thai figures on a fixed consolidation date, the closing calendar is built backwards from that date.

Changing auditors

We manage the handover file — prior opinions, opening balances, management representations — so the incoming CPA starts from evidence, not assumptions.

See the English-speaking accounting firm overview, all accounting services or the province pages below.

Questions owners ask first

Which Thai companies must have audited financial statements?: Every company limited registered in Thailand is required to have each year's accounts examined and signed off by a certified public accountant, approved at an ordinary shareholders' meeting held within four months of the financial year end, and submitted to the Department of Business Development. There is no small-company exemption from the audit itself, though smaller entities may use simplified reporting standards.
If you prepare our books, can you also sign the audit?: No, and you should be cautious of any arrangement where one party does both. Auditor independence rules prohibit the CPA who signs the opinion from having prepared the accounting records. Our role is to make your books audit-ready and to liaise with your appointed auditor; the opinion itself always comes from an independent CPA.
How long does a Thai statutory audit take?: Fieldwork for a straightforward SME typically runs one to three weeks once the closing schedules are complete. Delays almost always come from missing reconciliations or unlocated supporting documents, which is why the pre-audit preparation matters more than the fieldwork itself.
What does audit support cost?: The fee depends on transaction volume, the state of the current-year books and how much correction the prior periods need. Send the latest trial balance and we reply with a written scope and fee — the review itself is free of charge.

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