# Do I need to register for VAT in Thailand?

Last updated: 25 October 2026
Country: Thailand
Category: VAT

**Quick answer:** Yes, once annual turnover exceeds 1.8 million baht. Register before you start trading or within 30 days of crossing the threshold. You can register voluntarily below it.

## Detailed explanation

## The threshold

A business that regularly sells goods or services in Thailand must register for VAT when its annual turnover exceeds 1.8 million baht.

## When

Before trading, or within 30 days of the day income goes over the threshold.

## Voluntary registration

Allowed below the threshold. It lets you claim input VAT but means filing P.P.30 every month.

## How AccountsOS helps

Finn tracks your turnover against 1.8 million baht and warns you as you approach it.

Source: https://www.rd.go.th/english/6043.html

## Real-world examples

### Growing consultancy

Turnover reaches 1.8 million baht in August. Register within 30 days.

## Common mistakes to avoid

- Waiting until year-end to register
- Forgetting the monthly P.P.30 once registered

## Frequently asked questions

### Do foreign digital sellers register?

Foreign e-service providers selling to non-registered Thai customers use the same 1.8 million baht test.

## Practical tips

- Watch the threshold monthly, not annually.

## Related questions

- [What is the VAT rate in Thailand?](https://accounts-os.com/th/questions/what-is-the-vat-rate-in-thailand)
- [When is the Thai VAT return P.P.30 due?](https://accounts-os.com/th/questions/when-is-pp30-due-in-thailand)