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Thai e-Tax Invoice: Threshold, Format, and Penalties
Thailand's e-Tax Invoice / e-Receipt system is run by ETDA + Revenue Department. Mandatory for certain VAT-registered businesses; voluntary for others. This guide explains the threshold, the XML format, and the penalties for incorrect issuance.
TL;DR
Thailand's e-Tax Invoice / e-Receipt system is jointly operated by the Electronic Transactions Development Agency (ETDA, MDES) and the Revenue Department. The two formats are e-Tax Invoice & e-Receipt (full digital signature + RTGS deposit) and e-Tax Invoice by Email (simplified flow for smaller VAT registrants). Issuance must comply with Revenue Department Notifications under Revenue Code §86. Penalties for incorrect issuance can include input-VAT credit denial for the buyer and surcharges on the issuer.
Who Must Use It
| Scenario | Mandatory / Voluntary |
|---|---|
| VAT-registered businesses transacting with government and large customers | Often mandatory contractually |
| e-Tax Invoice by Email — turnover < THB 30 million | Voluntary simplified flow |
| e-Tax Invoice & e-Receipt — full XML + digital signature | Voluntary except where buyer requires |
Technical Format
- XML format conforming to ETDA-approved schema.
- Digital signature using ETDA-approved CA.
- Submission via the RTGS portal or ASP integration.
- Retention: 5 years (Revenue Code §87/3).
Penalties
- Failure to issue: surcharge 2× the VAT amount + criminal penalty.
- Incorrect particulars: surcharge as per Notification.
- Late issuance: 1.5% per month interest + administrative penalty.
- Buyer-side: input VAT denied if invoice does not meet §86/4 particulars.
Common Mistakes
- Using a paper invoice when the buyer requires e-Tax Invoice.
- Submitting non-conforming XML — rejected by RTGS.
- Missing the 15-day RTGS submission window after issuance.
FAQs
1. Can foreign-incorporated sellers issue Thai e-Tax invoices?
Foreign sellers without Thai VAT registration commonly fall under reverse-charge rules; Thai buyers self-account VAT.
Related Reading
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