In accordance with regulatory guidelines, companies are required to submit their annual financial statements within a specified timeframe, typically within a few months after the end of their fiscal year. Failure to meet this deadline can result in the imposition of fines and penalty fees. In Thailand, regulatory guidelines specify the timeframe for tax and financial statement submissions as follows:
Monthly Filing
| No. | Description | Recipient | Form | Government Organization | Deadline (in following month) | |
| Paper | Online | |||||
| 1 | Withholding tax | Company staff | PND.1 | Revenue Department | 7th | 15th |
| 2 | Withholding tax | Entity registered in Thai | PND.3 | Revenue Department | 7th | 15th |
| 3 | Withholding tax | Thai tax payer | PND.53 | Revenue Department | 7th | 15th |
| 4 | Withholding tax | Non-Thai corporate/personal | PND.54 | Revenue Department | 7th | 15th |
| 5 | VAT report | Local transactions | PP.30 | Revenue Department | 15th | 23rd |
| 6 | VAT report | Overseas transactions | PP.36 | Revenue Department | 7th | 15th |
| 7 | Social Security Fund | Monthly contribution report | SPS1-10 | Social Security Office | 15th | 15th |
Annual Filing
| No. | Description | Filing form | Government Organization | Filing Deadline | Closing date 31st Dec. |
| 1 | Minute of Annual General Meeting (AGM) | Minute of meeting | Department of Business Development | within 120 days after year ended date | 30 April |
| 2 | Annual updated shareholder list (BOJ.5) | DBD E-filing | Department of Business Development | within 14 days after AGM date | 14 May |
| 3 | Annual financial statement | DBD E-filing | Department of Business Development | within 1 month after AGM date | 31 May |
| 4 | Annual Tax filing Form | PND.50 | Revenue Department | within 150 days after year ended date | 30 May |
| 5 | Half-year Tax Filing Form | PND.51 | Revenue Department | within 60 days after 6 months period ended | 31 August |
| 6 | Annual Staff Summary Salary Report | PND.1 Kor | Revenue Department | within February of the following year | 28 February |
| 7 | Social Security Contribution-compensation additional | Kor Tor 20 | Social Security Office | by letter date | January |
