Does employing foreign staff: tax and work permit obligations require additional translation or certification?
Short answer
An employer withholds personal income tax from salary each month, remits it with PND.1, and separately registers employees with the Social Security Office and remits employer and employee contributions. Both filings are monthly and both are checked against the payroll register.
How this case runs end to end
Register the employer and enrol employees, set up the payroll register with tax and contribution calculations, remit tax and contributions monthly, reconcile to the annual summary, and update enrolments whenever staff join or leave.
Stage-by-stage timeline
| Stage | Work | Owner | Window |
|---|---|---|---|
| Document collection | Collect source documents, prior returns and statements | Client | 2–5 working days |
| Preparation | Bookkeeping, computation and reconciliation to the ledger | IVC | Depends on volume |
| Review | Client review of the computation and the return before filing | Client and IVC | 1–3 working days |
| Filing | Submit through e-Filing or at the counter and retain the receipt | IVC | By the statutory deadline |
| Follow-up | Respond to any enquiry and archive the supporting file | IVC | As required |
| Scoping | Review the entity, period, filings due and current records | IVC | On enquiry |
What to prepare
- Company affidavit, VAT certificate (PP.20) where issued, and the tax ID
- The accounting period and the filing deadline that applies to it
- Source documents: invoices, receipts, contracts and bank statements for the period
- Prior-period returns and the audited financial statements already filed
- Details of the authorised signatory and any e-Filing credentials in use
- For cross-border items: the counterparty's country and tax residence evidence
- A written authorisation where an agent files on the company's behalf
What "Does employing foreign staff: tax and work permit obligations require additional translation or certification?" actually involves
This question sits within payroll, employee tax and social security. The authority or standard that governs it directly is the Revenue Department and the Social Security Office, and every case is assessed against the rules in force on the day of submission. IVC prepares the file, checks internal consistency and coordinates with the receiving office; we are not a government body and we never guarantee how an authority will decide.
Benefits in kind form part of assessable income and have to be valued rather than ignored.
Contribution records feed employee benefit entitlements, so payroll errors become employee claim problems later.
Foreign employees are subject to the same payroll withholding, and their work authorisation must match the employer named in the payroll.
Rules and requirements to settle before you start
The annual employer summary is reconciled against the monthly filings, so unresolved differences surface at year end.
Enrolment and de-enrolment must be reported in the month the change happens, otherwise contributions and benefit records fall out of step.
A full-form tax invoice must carry the prescribed particulars; a missing item makes the input VAT non-creditable even when the payment is genuine.
A nil month still requires a PP.30 filing; skipping it creates a late-filing record rather than nothing at all.
The mistakes that cost the most time
The most expensive pattern is treating the deadline as the start of the work. Monthly VAT and withholding returns depend on documents that arrive from suppliers and customers, so a file assembled in the last three days is the file where a missing tax invoice becomes an irrecoverable input credit rather than a phone call.
The second is inconsistency between systems. The return, the input and output reports, the payroll register and the audited accounts are all read together on review, and a difference nobody can explain turns a routine desk check into a full enquiry covering earlier periods as well.
Why files are delayed or returned
- Joiners and leavers reported late
- Benefits in kind omitted from assessable income
- Payroll paid by a company other than the work permit employer
- Monthly filings that do not reconcile to the annual summary
- Input VAT claimed on non-creditable items
- Tax invoices missing a prescribed particular
Key terms in payroll, employee tax and social security
- Section 50 bis certificate
- The withholding tax certificate the payer issues to the payee at the time of payment.
- PND.50 / PND.51
- The annual and half-year corporate income tax returns.
- PP.30
- The monthly VAT return, filed whether or not the period had activity.
- Permanent establishment
- A taxable presence in a country as defined by the applicable treaty article.
- DBD e-Filing
- The Department of Business Development system for submitting financial statements.
- Certificate of residence
- Evidence from a tax authority that a person or company is resident there for treaty purposes.
- Tax residence
- Status arising from presence in Thailand for 180 days or more in a calendar year.
Official sources
- The Revenue Department (Thailand) — Tax registration, returns and e-Filing
- Department of Business Development — Financial statement submission (e-Filing)
- Social Security Office (Thailand) — Employer registration and contributions
- Thailand Board of Investment — Investment promotion and tax privileges
- Electronic Transactions Development Agency — e-Tax Invoice and e-Receipt standards
Scope and limitations
IVC provides accounting, tax compliance and document services as a private firm. This page is general information, not a case-specific tax opinion, and it is not issued by the Revenue Department or any other authority. Rules and deadlines change, so confirm the position for your own period before acting. Fees are quoted after scoping — please contact our staff by phone, LINE or email.
Information as of August 2026
Other questions in this group
- What documents are required for running payroll and withholding employee tax?
- What is the step-by-step process for running payroll and withholding employee tax?
- How long does running payroll and withholding employee tax normally take?
- Which authority handles running payroll and withholding employee tax?
- What conditions must be met before running payroll and withholding employee tax?
- Why is running payroll and withholding employee tax most often rejected or returned?
- How far in advance should running payroll and withholding employee tax be arranged?
- Can someone else act on your behalf for running payroll and withholding employee tax, and what power of attorney is needed?
- What is most commonly overlooked in running payroll and withholding employee tax?
- Does running payroll and withholding employee tax require additional translation or certification?
- What happens if a document for running payroll and withholding employee tax is lost or expired?
- How does running payroll and withholding employee tax differ for foreign nationals compared with Thai nationals?
Need an answer for your own case? Talk to our staff by phone, LINE or email.