{"id":31279,"date":"2026-06-23T14:27:19","date_gmt":"2026-06-23T14:27:19","guid":{"rendered":"https:\/\/www.othellointernational.com\/?p=31279"},"modified":"2026-06-27T08:42:42","modified_gmt":"2026-06-27T08:42:42","slug":"56-1-one-report-deadline-2026","status":"publish","type":"post","link":"https:\/\/www.othellointernational.com\/th\/56-1-one-report-deadline-2026\/","title":{"rendered":"56-1 One Report Deadline 2026: Thailand Filing Dates & Bilingual Requirements"},"content":{"rendered":"

Short answer:<\/strong> companies listed on the Stock Exchange of Thailand (SET) and mai must file the Form 56-1 One Report within three months of their fiscal year-end<\/strong>. For most Thai listed companies, whose financial year ends on 31 December, the 2026 filing deadline therefore falls at the end of March 2026<\/strong> for FY2025 — and the report must be available in both Thai and English<\/strong>. Always confirm the exact date for your fiscal year with the SEC and SET.<\/p>\n

What is the Form 56-1 One Report?<\/h2>\n

The 56-1 One Report consolidated the old annual registration statement (Form 56-1) and annual report (Form 56-2) into a single disclosure document. It took effect for fiscal years beginning in 2021, so listed companies have filed in the One Report format since 2022. It brings a company’s financial statements, management discussion and analysis (MD&A), corporate governance, risk factors and sustainability information together in one filing for regulators and investors.<\/p>\n

When is the 56-1 One Report deadline in 2026?<\/h2>\n

The filing window is three months from the end of the fiscal year<\/strong>. Because the large majority of SET-listed companies use a 31 December year-end, their FY2025 One Report is due by approximately 31 March 2026<\/strong>. If your company uses a different fiscal year-end, your deadline shifts accordingly — three months after your own year-end. These are statutory timelines, so confirm the precise date with the SEC and SET for your filing.<\/p>\n

Is an English version mandatory?<\/h2>\n

Yes. SET- and mai-listed issuers are expected to make the annual report and financial disclosures available in both Thai and English<\/strong> so that international investors can access them. In practice this means the entire One Report — not just the headline numbers — needs an accurate, consistent English version delivered on the same timeline as the Thai filing. See our annual report & 56-1 One Report translation<\/a> service for how this is handled end-to-end.<\/p>\n

What’s inside the One Report that needs translating<\/h2>\n