VAT Registration in Thailand: The THB 1.8M Threshold and PP.30 Filing

VAT is one of the most important recurring tax obligations for a growing business in Thailand. For many companies, the key question is simple: when does VAT registration become mandatory?

For businesses regularly selling taxable goods or providing taxable services in Thailand, the main threshold is THB 1.8 million in annual turnover. Once a business exceeds that amount, it generally needs to register for VAT and start managing monthly VAT compliance.

After registration, the business must calculate output VAT and eligible input VAT, issue compliant tax invoices, maintain VAT records and submit the monthly PP.30 filing.

Key takeaways

Who must register for VAT in Thailand?

The Thai Revenue Department states that a person or entity regularly supplying goods or providing services in Thailand is subject to VAT when annual turnover exceeds THB 1.8 million.

This can apply to companies, partnerships and individual business operators. The important issue is not simply whether a company has been incorporated in Thailand. The nature of its activities and the amount of its turnover determine whether VAT registration is required.

Importers are also subject to VAT on imports regardless of whether they are already VAT-registered. Import VAT is normally collected by the Customs Department when goods enter Thailand.

Certain activities fall outside normal VAT treatment or are specifically exempt. Businesses therefore need to establish both their turnover and the tax treatment of the goods or services they sell before deciding whether registration is required.

For foreign entrepreneurs starting a company in Thailand, this is best considered early. Waiting until year-end accounts are prepared can create problems if the company actually crossed the registration threshold months earlier.

The THB 1.8 million threshold explained

The VAT threshold is based on turnover, not profit.

This distinction matters.

Suppose a company earns THB 2 million from taxable services during the year but has THB 1.7 million of expenses. Its accounting profit may only be THB 300,000, but that does not mean it stays below the VAT threshold. It is the revenue from the relevant business activities that matters.

The Revenue Department's VAT guidance identifies businesses with annual turnover above THB 1.8 million as subject to VAT.

Once turnover exceeds the threshold, the Revenue Department's registration guidance requires the operator to submit a VAT registration application within 30 days from the date the revenue exceeds THB 1.8 million.

For a growing company, that means revenue should be monitored during the year rather than checked only after the accounting period closes.

A simple monthly VAT threshold review can prevent a business from discovering several months later that it should already have registered.

Can a business register voluntarily?

Yes. A business does not always have to wait until turnover exceeds the mandatory threshold.

Revenue Department guidance permits certain businesses with revenue of THB 1.8 million or less per year to apply for VAT registration voluntarily. It also provides registration routes for some businesses that would otherwise fall within specified VAT exemptions.

Voluntary registration can make sense when a company expects rapid growth or has substantial VAT-bearing business expenses.

Consider a new B2B company buying computers, professional services, office equipment and other taxable supplies before revenue reaches the threshold. Becoming VAT registered may allow qualifying input VAT to be included in the VAT calculation, provided the relevant requirements are met.

It can also make commercial sense when most customers are VAT-registered companies that expect proper VAT tax invoices.

However, voluntary registration should not be treated as an administrative formality. Once registered, the company takes on recurring obligations including tax invoices, VAT accounting and monthly PP.30 returns.

Before applying, it is worth reviewing the expected benefit against the additional compliance workload.

Thailand's 7% VAT rate and exemptions

The current general Thailand VAT rate is 7%. The Revenue Department confirmed the continued collection of VAT at this rate in August 2026.

The position deserves some context because the Revenue Code provides for a higher underlying rate while Royal Decrees have reduced the amount actually collected. The Revenue Department explains that the commonly quoted 7% comprises the reduced VAT component together with the local tax allocation.

On July 27, 2026, the Cabinet approved in principle a further extension of the reduced VAT rate for the period from October 1, 2026 to September 30, 2027.

Not every transaction is charged at 7%.

Revenue Department guidance identifies several categories of VAT-exempt activities, including certain unprocessed agricultural products, specified educational services, healthcare services, domestic land transportation and qualifying professional activities. Small operators below the registration threshold may also fall within the VAT exemption rules.

Businesses should also understand the difference between exempt and zero-rated transactions.

Certain transactions, including qualifying exports of goods and specified services used outside Thailand, can be subject to VAT at a 0% rate rather than being exempt.

That distinction matters because zero-rated businesses can have different rights to input VAT recovery compared with businesses making exempt supplies.

How the monthly PP.30 process works

Once registered for VAT, businesses move into a monthly compliance cycle.

The Revenue Department states that the VAT tax period is a calendar month and that VAT returns must therefore be filed monthly.

The basic calculation is:

Output VAT – Eligible input VAT = VAT payable or VAT credit

Output VAT is generally the VAT the business charges customers on taxable sales.

Input VAT is generally qualifying VAT charged to the business on purchases used in its taxable activities.

For example, if a company has THB 70,000 of output VAT for a tax month and THB 40,000 of eligible input VAT, the difference before other adjustments would be THB 30,000 payable.

These amounts are reported on Form PP.30, the standard VAT return published by the Revenue Department.

The Revenue Department's PP.30 instructions state that registered businesses must file the form every month by the 15th day of the following month, including months in which there was no sale or service provision.

For qualifying returns filed through the Revenue Department's internet system, Ministry of Finance rules extend covered electronic filing deadlines by 8 days, which normally moves a PP.30 deadline from the 15th to the 23rd day of the following month.

Actual dates can shift when deadlines fall on weekends or public holidays. For example, the Revenue Department's August 2026 calendar moved that month's PP.30 paper deadline to August 17, 2026 and its internet filing deadline to August 24, 2026 because of calendar adjustments.

Businesses should therefore check the Revenue Department calendar rather than assuming that every month's deadline will fall on exactly the same date.

You can also review Settlr's tax deadlines for a business-focused compliance overview.

How input VAT recovery works

One of the main benefits of VAT registration is the ability to offset qualifying input VAT against output VAT.

But simply paying VAT to a supplier does not automatically make it recoverable.

The business must have qualifying supporting documents, particularly a valid tax invoice and the expense must meet the rules for input VAT deduction.

The Revenue Department explains that input VAT is generally deducted from output VAT when calculating the VAT liability. It also states that certain input VAT is specifically non-creditable, including VAT relating to some entertainment expenses.

If eligible input VAT exceeds output VAT, the business may have excess VAT rather than tax to pay. Revenue Department guidance allows the excess to be dealt with through VAT credit or, where the relevant conditions are satisfied, a refund process.

Documentation is therefore critical.

A business should reconcile its sales invoices, purchase invoices and VAT reports every month before filing PP.30. Missing or defective tax invoices can turn what looked like recoverable VAT into a real business cost.

For companies that prefer to outsource this process, Settlr's tax compliance service can combine bookkeeping, tax preparation and recurring filing support.

What happens if VAT registration or PP.30 filing is late?

Late VAT compliance can create several different exposures.

First, failing to register when registration is legally required is an offence. Revenue Department registration guidance states that a person required to register who carries on business without doing so may face imprisonment of up to 1 month, a fine of up to THB 5,000, or both. The same guidance states that an unregistered operator in that position cannot use input VAT in the VAT calculation.

Second, unpaid VAT can attract a surcharge.

Revenue Department penalty examples apply a surcharge of 1.5% per month or fraction of a month to unpaid VAT under Section 89/1 of the Revenue Code.

Additional penalties depend on the type of mistake. The Revenue Department's worked examples show that where PP.30 was not filed and VAT was payable, a penalty of up to 2 times the tax due may apply under the circumstances illustrated.

Because the outcome depends on the exact type of non-compliance, companies should not assume that every late VAT issue carries the same penalty.

If a filing has been missed or a past return appears incorrect, it is usually better to review the position promptly rather than allowing multiple tax periods to accumulate.

FAQs

Is VAT registration mandatory if revenue is below THB 1.8 million?

Generally, a small operator with annual turnover below THB 1.8 million can fall within the VAT exemption, although voluntary registration may be available depending on the activity and circumstances.

How quickly must I register after crossing the threshold?

Revenue Department guidance requires registration within 30 days after revenue exceeds THB 1.8 million.

What is the VAT rate in Thailand in 2026?

The current general rate is 7%. The Revenue Department confirmed the rate in August 2026, following Cabinet approval in principle to extend the reduced rate through September 30, 2027.

Do I need to file PP.30 if my company had no sales?

Yes. Revenue Department instructions state that VAT registrants must submit PP.30 monthly even where there was no sale or service provision during the tax month.

When is PP.30 due?

The normal deadline is the 15th day of the following month. Qualifying internet filings generally receive the 8-day electronic filing extension, making the normal online deadline the 23rd day of the following month, subject to weekends, holidays and Revenue Department calendar announcements.

Can every business expense generate recoverable input VAT?

No. Input VAT must meet the relevant tax requirements and be supported by acceptable documentation. The Revenue Department specifically notes that some input VAT, including VAT relating to certain entertainment expenses, is not creditable.

Plan VAT compliance before it becomes urgent

The THB 1.8 million VAT threshold is easy to remember. Managing everything that comes after it requires more attention.

Growing businesses need to know when they cross the threshold, register within the required period, issue the right documentation, separate recoverable from non-recoverable input VAT and complete PP.30 every month.

Getting the process right from the beginning is much easier than correcting months of missed filings later.

Book an accounting review with Settlr to assess your VAT registration position, review your current tax process and build a reliable monthly compliance workflow.