Accounting guide
Thailand accounting requirements for companies
A practical guide to records, monthly bookkeeping workflow and annual compliance questions for businesses operating in Thailand.
Quick answer
Thai companies need proper accounting records and a recurring compliance workflow. The exact monthly workload depends on transaction volume, VAT status, payroll, withholding tax and whether prior records are complete.
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 limited companies with monthly activity.
- New companies setting up accounting after registration.
- Foreign-owned companies operating in Thailand.
- Low-activity companies that still need records and deadline control.
Common mistakes
- Waiting until year-end to organize monthly records.
- Mixing personal and company expenses without documentation.
- Missing VAT, payroll or withholding tax triggers.
- Changing accountants without collecting prior filings and source documents.
What to review
Thailand accounting requirements for companies
Records to organize
- Sales invoices, receipts and contracts.
- Purchase invoices, receipts and supplier records.
- Bank statements, payment evidence and owner expense notes.
- Payroll and employee records when the company has staff.
Monthly workflow
- Collect documents on a consistent schedule.
- Reconcile bank records, invoices and receipts.
- Check VAT, withholding tax and payroll touchpoints.
- Track upcoming filing or annual compliance deadlines.
Annual review
- Prepare financial statement workflow from complete records.
- Review DBD and corporate tax filing requirements with current sources.
- Confirm audit or annual compliance scope before deadlines.
Source and review notes
When to contact an accountant
When to contact an accountant
- The company has just been registered.
- VAT, payroll or withholding tax status is unclear.
- Records are behind or annual filing is approaching.
- The business needs a monthly document handoff process.
Source and review notes
- DBD source review needed for annual filing references.
- Revenue Department source review needed for tax references.
- Accounting reviewer and last updated date required before treating the page as final.
FAQ
Thailand accounting requirements FAQ
Does every Thai company need monthly bookkeeping?
A company needs proper records. Monthly work depends on activity, VAT, payroll, withholding tax, transaction volume and deadline pressure.
What should I send first?
Send company details, tax ID, prior filings, invoices, receipts, bank records, payroll data and the next known deadline.
Can a low-activity company wait until year-end?
Waiting can create risk if documents are missing or filings are due earlier. Review the company situation before deciding cadence.
Next step
Review your accounting record workflow
Send your company stage, records, VAT or payroll status and next deadline so the accounting scope can be reviewed.