Do I Need to Register for VAT in Thailand? A Guide for Foreign-Owned Businesses

Quick answer: You must register for VAT in Thailand once your taxable turnover exceeds THB 1.8 million a year, and apply within 30 days of crossing the threshold. VAT is charged at 7% (the reduced rate has been extended to 30 September 2027) and returns (PP.30) are filed monthly. Some businesses register voluntarily from day one so they can reclaim input VAT.

In this guide

1. The VAT threshold
2. How Thai VAT works each month
3. Pros and cons of registering early
4. Common VAT mistakes foreign owners make

The VAT threshold

• Mandatory: taxable turnover above THB 1.8 million per year.
• Deadline: apply within 30 days of exceeding the threshold.
• Voluntary: you can register earlier — useful if your clients are VAT-registered businesses or you have large start-up purchases.
• Some activities are VAT-exempt (and some may instead fall under Specific Business Tax), so check your activity first.

How Thai VAT works each month

1. Issue full tax invoices with the required details for every taxable sale.
2. Keep input tax invoices from your suppliers.
3. File PP.30 monthly: output VAT minus input VAT. Pay the difference, or carry forward / claim a refund.
4. Keep the sales and purchase tax reports up to date.

Paying overseas suppliers for services used in Thailand usually requires self-assessed VAT on PP.36.

Pros and cons of registering early

Pros	Cons
Reclaim input VAT on setup costs and purchases Look established to corporate clients	Monthly filing even when there are no sales Prices to non-VAT customers rise by 7%

Common VAT mistakes foreign owners make

• Missing the 30-day registration window after crossing THB 1.8 million.
• Issuing invoices that are not valid full tax invoices, so customers cannot claim input VAT.
• Forgetting PP.36 on overseas service payments.
• Not filing “nil” returns in months without sales.

Unpaid VAT attracts a 1.5% monthly surcharge plus penalties, so it pays to get the routine right from month one.

Frequently asked questions

What is the VAT rate in Thailand in 2026?

7%. The reduced rate has been extended until 30 September 2027.

When do I have to register for VAT in Thailand?

When taxable turnover exceeds THB 1.8 million per year; apply within 30 days of crossing the threshold.

Can I register for VAT voluntarily?

Yes. Many new companies register early to reclaim input VAT and to invoice VAT-registered clients.

How often are VAT returns filed in Thailand?

Monthly, on form PP.30, even in months with no sales.

General information current as of October 2026, not legal or tax advice. Thai rules and government fees change; we confirm current requirements for your case in a free 30-minute consultation.