Which taxes does a Thai company file each month and each year, and what are the deadlines?
Many owners assume tax is "filed once a year". In fact a Thai company has filings every month, and penalties and surcharges start accruing from the first missed return.
1. Monthly filings (for the previous month)
| Form | What it covers | Who files | Deadline (paper / e-filing) |
|---|
| PND.1 | Personal income tax withheld from salaries | Companies paying salaries | 7th of next month / usually extended to the 15th |
| PND.3 | Withholding tax on service fees, rent etc. paid to individuals | When such payments are made | 7th / usually 15th |
| PND.53 | Withholding tax on service, freight, advertising fees etc. paid to Thai companies | When such payments are made | 7th / usually 15th |
| PND.54 | Withholding tax on service fees, interest, royalties, dividends etc. paid abroad | When cross-border payments are made | 7th / usually 15th |
| PP.36 | Self-assessed VAT on services bought from abroad | When foreign services are paid for | 7th / usually 15th |
| PP.30 | VAT return | VAT-registered companies — even with no sales | 15th / usually extended to the 23rd |
| Social security | Employee and employer contributions | Companies with employees | 15th of next month |
The e-filing extension is announced by the Revenue Department each year; follow the current announcement.
2. Annual filings (financial year ending 31 December)
| When | What |
|---|
| By end of February | PND.1 Kor: annual summary of salary withholding |
| By end of April | Complete the annual audit and hold the shareholders' meeting to approve the financial statements (within 4 months of year end) |
| Within 14 days of the meeting | File the shareholder list (BOJ.5) with the DBD |
| Within 1 month of the meeting | File the audited financial statements with the DBD |
| By end of May | PND.50: annual corporate income tax return (within 150 days of year end), with audited statements |
| Within 2 months after the first 6 months (e.g. end of August) | PND.51: half-year CIT prepayment |
BOI companies also have BOI annual reports and exemption applications on top of this (see What reports must Chinese enterprises with BOI privileges submit every year?).
3. Why manage it as a calendar
The annual items form a chain: if the audit is not finished, the shareholders' meeting cannot be held, and the DBD filing and annual CIT return are both delayed. Start the annual audit as soon as the year closes, not one month before the deadline.
4. Basis and scope of service
Basis: Thai Revenue Code filing deadlines for withholding tax, VAT and corporate income tax; Revenue Department e-filing extension announcements; Civil and Commercial Code and Accounting Act provisions on shareholders' meetings and the audit and filing of financial statements; Social Security Office contribution rules. Actual deadlines follow the current announcements of the Revenue Department, DBD and Social Security Office. Z&X's accounting outsourcing service works from a compliance calendar, and every filing is confirmed by the client first (see How does the service provider make sure the client confirms filings first?).
Related services: Accounting & Tax Outsourcing | Audit Services
Free download: Thailand Company Annual Tax & Compliance Calendar (PDF, 2 pages): every monthly and annual filing deadline on two printable pages.
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