Thai tax and customs documents for use abroad — 6 cases

This certificate answers one question: was the applicant a Thai tax resident in the stated tax year? The destination country uses that answer to decide whether treaty benefits under a double taxation agreement apply, so the tax year on the certificate must match the year the income arose, not the year of application.

For individuals, residence under the Revenue Code turns on days of presence in Thailand during the tax year; for companies it turns on incorporation under Thai law. The supporting evidence filed with the application therefore differs sharply between the two cases.

PND 90 and PND 91 are personal income tax returns; PND 50 is the corporate return. All three are filed by the taxpayer rather than issued by the Revenue Department, so their evidential weight comes from the accompanying filing and payment records.

Where filing is electronic, recipients typically want both the return itself and the receipt or payment record. Where filing is over the counter at an area revenue office, ask for a stamped acknowledged copy on the day of filing.

Section 50 bis of the Revenue Code requires the withholding agent to issue a certificate to the person from whom tax was withheld. It is therefore the payer's document, not the Revenue Department's — which determines whether notarial signature certification is needed before legalisation.

For a foreign tax credit claim, recipients typically want three things visible at once: who the income belonged to, what category of income it was, and how much tax was withheld. Certificates missing any of these are usually returned.

A PP 20 evidences that a business is registered for VAT with the Revenue Department. Foreign counterparties often ask to see it before entering long-term contracts, or when opening accounts with overseas service providers.

Recipients usually check the registered name, taxpayer identification number, place of business and the date VAT registration took effect. If any of these have changed, notify the Revenue Department before using the certificate.

Thai customs clearance is largely electronic, so a declaration exists as data in the Customs Department's system. Where the recipient needs verifiable evidence, request an agency-certified copy rather than a self-printed page.

Supporting documents commonly requested alongside are the commercial invoice, packing list, bill of lading or air waybill, and certificate of origin. Numbers, dates and item descriptions must reconcile across the set, or the recipient will query it immediately.

These two are often lumped together but do different jobs. A tax clearance certificate under Section 4 bis of the Revenue Code concerns departure from Thailand by certain categories of taxpayer prescribed by law. A certificate of payment of tax certifies the fact that a stated amount of tax for a stated year has been paid.

Foreign recipients almost always want the certificate of payment, because what they need to verify is payment, not a right to travel. Requesting the wrong document wastes time.