Thailand Business: Filing a P.P. 30 Value Added Tax (VAT) Return

2026-05-202026-05-20 by Anne Som

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Filing a P.P. 30 VAT return in Thailand is mandatory for every VAT-registered business, due monthly regardless of whether you owe tax. Here’s what you need to know to stay compliant.

In Thailand, you’ll want to register your company for VAT if you anticipate you’ll cross the annual VAT registration threshold of 1.8 million THB per annum.

This will make you liable to file the P.P. 30 or Value Added Tax (VAT) Return form monthly.

The P.P. 30 (Phor Por 30 in Thai) is part of the Thai Revenue Department’s VAT system. Before you can file a P.P. 30, you will need to register your company for VAT and obtain a VAT registration certificate or P.P. 20.

Contents

Key Takeaways
What Is It?
Who Needs to File It?
How to Prepare P.P.30
Supporting Documents for P.P.30
How to File P.P.30
How to Pay Tax
How to Get Tax Return
When to File Your VAT
Late Fines
Now, on to You

Key Takeaways

You must file the P.P. 30 form every month once you hold a VAT certificate, even if you owe no VAT that month.
VAT registration is required once your annual revenue exceeds THB1.8 million.
E-filing is the recommended method, with a deadline extended to the 23rd of the following month.
A local accountant is strongly recommended to handle filings, communicate with the Revenue Department in Thai, and avoid costly mistakes.
Keep all sales and input tax invoices, as the Revenue Department may request them for review at any time.
Input tax invoices are valid for six months and can be used to offset your sales VAT.
Late filing penalties start at THB300 within 7 days and rise to THB500, plus a 1.5% monthly surcharge on unpaid VAT.
Requesting a VAT refund can trigger a full audit, which may significantly increase your accounting workload.

What Is It?

P.P.30 is a form for VAT return in Thailand. You need to file it every month to the Revenue Department, for both paying VAT or getting VAT return.

Who Needs to File It?

Everyone who has a VAT certificate. It can be individuals, companies, or companies promoted by the Board of Investment.

Basically, after you start your business in Thailand and have revenue over 1.8 million baht per year, you need to register for VAT. Then, you need to add VAT to all of your services and report that every month to the Revenue Department via P.P. 30 form.

VAT certificate PP20 — As soon as you have this VAT certificate (P.P.20),
you need to file P.P.30 every month.

Even if you owe no VAT, the P.P. 30 form must still be filed monthly.

When it comes to original purchase invoices and copies of the sales tax invoices to the Revenue Department physically, you need to keep them. The revenue department may ask for it later.

Another useful link: How to Get a VAT Registration Certificate in Thailand as a Business Owner

How to Prepare P.P.30

You can get an English copy of the P.P. 30 VAT form from the Revenue Department website.

Within the form, you need to list out the total amount of input tax, output tax, and also any tax credits you have that month.

The VAT to be remitted will be derived from the sales tax that comes from selling products or services in that month, minus the input tax on company expenses related to the month’s business operations.

Input tax invoices have a six-month validity to be used to offset sales VAT.

At the end of the form, you need to fill out the total amount of tax you need to pay or return.

Although it’s possible to do it yourself, it’s better to hire an accountant to prepare and file the P.P. 30 form for your company.

This is to prevent any penalty for filing incorrect information. The accountant can also help you talk with a Revenue Department officer when they have any questions with the form – which is really helpful unless you can speak Thai fluently.

Another useful link: Get the Right Company for Accounting Service in Bangkok, Thailand

Supporting Documents for P.P.30

To prepare the P.P.30, you need to send all of the sales tax invoices and input tax invoices of that month to your accountant.

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Tax invoices need to include all of this information:

Seller name, address, tax ID
Buyer name, address, tax ID
Invoice number
Description of goods/services
VAT amount separated clearly
Date
Signature (for paper invoices)

After that, an accountant will make a report for the P.P.30 and send them to the Revenue Department along with the P.P.30 form and copies of tax invoices when the Revenue Department asks for them.

Tip: Only tax invoices qualify for input tax credit

How to File P.P.30

There are two ways you can file P.P.30. You can file it on paper at your local Revenue Department. Or you can e-file it through the E-Filing website.

E-filing is much more convenient. You just need to choose the P.P.30 form and file it digitally. You can also upload supporting documents there.

After that, you can save the file to your company for a record.

You can create a separate account and send it to your accountant to file it for your company. If you use an accountant to open your company and register for VAT, they may already create an account for you.

In addition, you can also file other types of corporate tax through this website as well.

Another helpful link: Taxes You Have to Deal with as a Business Owner in Thailand

How to Pay Tax

After you file the P.P.30 form, you can pay tax directly to a local Revenue Department or make a bank transfer.

How to Get Tax Return

To get a tax return, there are three options:

in cash (if you file at a local Revenue Department for a small refund)
bank transfer
as a tax credit for next month’s filing

However, requesting a tax refund depends on your circumstances. In some cases, an accountant might not recommend it because there’s a high chance the Revenue Department may audit your company, which can significantly increase your accounting work.

Also, for a large refund, it can take a few years for the Revenue Department to complete the audit.

Another helpful link: Increase Your Chances of Getting Tax Refunds

When to File Your VAT

It depends on how you file:

Paper filing: before the 15th day of the following month (i.e., all trading activity in January must be filed by February 15).
Digital filing (recommended): extended to the 23rd of the following month.

It is important to note again that you need to file P.P.30 every month although you owe no VAT on that month. You just need to enter “0” on input tax, output tax, and the total amount of tax you need to pay.

If the 15th falls on a Saturday, Sunday or a public holiday, the form is due on the next working day.

Another helpful link:

When and How to File Taxes as a Business Owner in Thailand

Late Fines

There are severe penalties for not filing company taxes according to schedule. It is important to complete the VAT return on time to avoid penalties, and accurately to prevent having to file amended returns.

Late filing fine: THB300 (within 7 days late)
After 7 days: THB500
Surcharge: 1.5% per month of VAT payable
Penalty for underpayment or non-filing: up to two times the VAT due
Penalty: up to THB2,000 (Section 90 of Revenue Code)

Other types of aberrant VAT filing or non-compliance can also lead to penalties up to twice the amount of VAT due.

Another helpful link: Taxation in Thailand: 6 Common Mistakes

Now, on to You

Handling company accounting in Thailand – filing VAT returns and claiming VAT deductions – can be complex, especially if you don’t speak Thai. Become aware of the taxes you are liable for as a business owner, and don’t fall prey to common accounting mistakes.

Remember that with the help of local accounting firms who know the ins and outs of the Thai accounting system and are experienced in dealing with the Thai Revenue Department, you can stay in compliance with little to no headache even without a large accounting budget.