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Personal Income Tax Return — PND.90 (multiple income types) ภ.ง.ด.90

Annual PIT return for individuals with income beyond salary (rent, dividends, freelance, business). certified English translation + Apostille available.

Who

Individuals (Thai or foreign residents) with income under Sec. 40(2)–(8) of the Revenue Code

Service fee

Ask our team

Timeline

Depends on the issuing office

Authority

The Revenue Department of Thailand (RD)

Legal Basis

Revenue Code Sec. 56, 56 bis; DG Notification on e-Filing

Eligibility

  • Thai tax ID (13-digit)
  • Income under Sec. 40(2)–(8)
  • Annual income exceeds threshold

Required Documents

  • Tax ID card / passport
  • Withholding tax certificates (50 bis)
  • Income evidence
  • Deduction evidence (insurance/RMF/SSF/donations)

Procedure

  1. Collect 50 bis from all payers
  2. Compute tax (progressive 0–35%)
  3. File via e-Filing/branch office
  4. Pay tax or claim refund
  5. Request certified copy + translation

Fee Structure

Filing is free. Service covers tax computation, e-Filing submission, certified copy and certified translation. Refund timing depends on RD review.

Cross-Border / DTA Notes

For visa or immigration use, check the receiving authority's requirements for tax returns, translation and legalization. Thailand does not issue Apostilles as of September 2026.

Related Services

ILC handles e-Filing, certified copies, certified translation and MFA legalisation, then checks whether the receiving authority requires embassy attestation. Thailand's Apostille Convention takes effect on 28 February 2027; until then the existing legalisation chain applies.

Post-Service Policy

If a document is rejected due to a defect in our translation or certification, our team coordinates corrections under our service policy and the terms of your quotation. This is not a guarantee of Revenue Department / MFA / embassy discretion.

Ask about fees — LINE @THAIL · Tel 092-0170000

Contact us
Accountant checking a Thai PND.90 form against supporting documents

Who files PND.90

Individuals with more than one type of assessable income — for example salary plus freelance fees, rent, interest or sole-proprietor business income — use PND.90 for the annual personal income tax return. Salary-only earners use PND.91 instead.

Deadline and channel

Due by the end of March of the year after the tax year, online via e-Filing or at a Revenue office. The Revenue Department may announce an extension for online filing each year, so check that year's notice.

Documents to prepare

All withholding certificates (50 Tawi), evidence of other income such as leases and interest statements, and allowance evidence such as insurance premiums, provident fund and donation receipts. Claiming actual expenses requires supporting records.

Frequently asked questions

Must foreign income be included?

It depends on your tax residence status and the Revenue Department's rules on remitting income into Thailand; have an accountant review your situation.

When will I get a refund?

The Revenue Department reviews and decides refunds and may request more documents; we do not quote fixed timeframes.

Send your documents for our accounting team to review

Call 092-0170000 · LINE @THAIL · contact@thailaw-accounting.co.th

Fees: ask our team for a quote

Sources

Reviewed by the accounting team at Thai Law & Accounting Services · Last reviewed 4 Oct 2026 · General information, not tax or legal advice for your specific case

Go deeper on Tax document certification

These guides outline possible certification steps; confirm the receiving authority's current requirements before filing:

Not sure which route applies? Send us the scan — LINE @THAIL · 092-0170000 · contact@thailaw-accounting.co.th

Documents usually required

  • Freshly issued original Thai civil or corporate record from the issuing office
  • Complete English translation of every page, with the translator's statement of accuracy
  • Copy of the document holder's passport or Thai national ID card
  • Power of attorney with ID copies of both parties if someone else files on your behalf

Common reasons a bundle is rejected

  • Residency certificates are issued for a specific tax year and cannot be reused.
  • Treaty claims require the article to be cited correctly on the form.
  • Spell every name exactly as it appears in the passport, across every document in the same bundle.

Prefer not to handle the chain yourself? Send the scans and we run every step for you, from translation to the final endorsement.

How the process runs — Tax document certification

  1. Obtain a freshly issued original from the office that produced the record and check that every page is present.
  2. Prepare a complete translation with the translator's statement of accuracy attached.
  3. File for legalization at the Department of Consular Affairs, Ministry of Foreign Affairs, with the original and the translation together.
  4. Complete the next certification layer required by the destination country — Apostille, or legalization at that country's embassy in Thailand.
  5. Collect the finished bundle, scan a full copy for your records, then submit it in the format the receiving authority specifies.

Fees and processing times are set by each authority and vary by document and destination — confirm them with the responsible agency.

Handling it yourself vs letting ILC run it

AspectDoing it yourselfWith ILC
Working out which steps applyYou read each authority's rules yourself, and usually learn a step was missing only after the bundle is refused.Our advisers review the documents before work starts and sequence translation, notarisation, MFA, and embassy in one pass.
Time spent filingRepeat trips to each office, queueing and collecting in person.We file on your behalf; you send scans and receive the finished set by post or courier.
Risk that the translation is refusedAgency names, job titles, and the certification wording often do not match what the receiving office accepts.We use terminology and certificate formats the receiving authority has accepted before, with two-stage proof-reading.
If the bundle is rejectedYou diagnose the cause and refile yourself, losing a full cycle.We identify the cause, correct it, and refile without you starting over, with progress reported along the way.

What clients typically use this for

  • Tax residency certificates
  • Double-tax treaty claims
  • Overseas audit and reporting

An advisor, not only a document processor

Before any work starts, our team assesses how many certification layers your document actually needs, which authorities are involved, and the correct order for the office you will really file with. One step out of order usually means restarting the whole bundle. We work to recognise how each authority rejects files and prevent it up front.

  • The certification route is matched to the receiving authority before work begins.
  • Rejection risks are checked, from name spelling to document validity windows.
  • The filing sequence is planned around the deadline you actually have.

Consult us at LINE @THAIL · 092-0170000 · contact@thailaw-accounting.co.th

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