Deadline guide
Thailand tax calendar for companies
Thailand tax calendar for companies with practical records, workflow, common mistakes and accountant review guidance for businesses operating in Thailand.
Quick answer
Thai company deadlines can include VAT, withholding tax, payroll-related filings and annual compliance. Exact dates are date-sensitive and should be checked against current official sources.
This guide is general information for businesses operating in Thailand. It is not individual tax, legal or accounting advice.
Who this guide is for
- Thai companies with recurring filings.
- VAT-registered businesses.
- Employers with payroll.
- Companies approaching year-end.
Common mistakes
- Using one generic calendar for every company.
- Forgetting annual compliance while tracking monthly filings.
- Not assigning a deadline owner.
- Trying to fix records only after a deadline arrives.
What to review
Thailand tax calendar for companies
Core review items
- Monthly VAT and WHT categories
- Payroll-related filing categories
- Annual corporate tax and DBD filing categories
- Internal owner and reminder workflow
Document workflow
- Confirm who owns the documents.
- Set a monthly handoff rhythm.
- Review missing records before filing.
- Keep questions attached to source documents.
Source and review notes
When to contact an accountant
When to contact an accountant
- Deadlines are close.
- Which forms apply is unclear.
- Prior filings are missing.
- Records are incomplete.
Source and review notes
- Official source review required before publishing exact rates, dates or legal obligations.
- Accounting/tax reviewer and last updated date required.
- Use Revenue Department, DBD or SSO sources depending on the topic.
FAQ
Thailand tax calendar FAQ
Can this guide replace professional advice?
No. It gives general context. Company-specific decisions should be reviewed against current facts and official sources.
What should I prepare first?
Prepare company details, current records, prior filings, bank records, deadline pressure and the question you need answered.
Why are exact dates and rates limited?
Tax and compliance content is date-sensitive. Exact figures must be checked against official sources before publication.
Next step
Review this guide against your company
Send your company status, VAT or payroll profile and next known deadline so the filing calendar can be reviewed.