Thai limited companies face a recurring annual compliance calendar: holding an Annual General Meeting (AGM) within 4 months of the fiscal year-end, filing audited financial statements with the Department of Business Development (DBD) within 1 month of the AGM (effectively within 5 months of fiscal year-end), and filing the annual corporate tax return (PND 50) with the Revenue Department within 150 days of the fiscal year-end. Companies must also file a mid-year estimated tax return (PND 51), maintain ongoing monthly VAT and withholding tax filings, and renew any work permits, visas, and (if applicable) BOI promotion certificates and Foreign Business Licenses on their respective renewal cycles.
Missing any one of these interlocking deadlines — AGM, DBD filing, PND 50, PND 51 — triggers escalating penalties and can jeopardize a company's good standing, which in turn can affect work permit renewals for foreign staff.
Key Facts
Annual General Meeting (AGM) must be held within 4 months of the company's fiscal year-end.
Audited financial statements must be filed with the DBD within 1 month of the AGM (effectively within 5 months of fiscal year-end).
Annual corporate tax return (PND 50) must be filed with the Revenue Department within 150 days of fiscal year-end.
Mid-year estimated tax return (PND 51) must be filed within 2 months of the end of the first 6 months of the accounting period.
Ongoing monthly obligations include VAT returns (PP.30) and payroll withholding tax (PND 1), alongside annual visa/work permit and BOI/Foreign Business License renewals where applicable.
Steps
Hold the AGM — Convene the Annual General Meeting within 4 months of the fiscal year-end to approve financial statements.
File financial statements with the DBD — Submit audited financial statements to the DBD within 1 month of the AGM.
File PND 50 and PND 51 — Submit the annual corporate tax return within 150 days of fiscal year-end, and the mid-year estimate within 2 months of the first half's close.
Track ongoing monthly and license renewals — Maintain monthly VAT/withholding filings and track renewal dates for work permits, visas, and any BOI/Foreign Business License.
Timelines
Annual General Meeting: within 4 months of fiscal year-end
DBD financial statement filing: within 1 month of the AGM
Annual corporate tax return (PND 50): within 150 days of fiscal year-end
Mid-year tax estimate (PND 51): within 2 months of the first 6 months' close
Required Documents
AGM minutes
Audited financial statements
PND 50 and PND 51 filings
Monthly VAT (PP.30) and withholding tax (PND 1) records
Common Mistakes
Missing the AGM deadline, which cascades into missing the subsequent DBD financial statement filing deadline.
Forgetting the mid-year PND 51 estimated filing, which many first-time foreign business owners overlook until the annual PND 50.
Letting a BOI promotion certificate or Foreign Business License lapse without tracking its specific renewal cycle.