Value Added Tax (VAT) is a key tax consideration for businesses operating in Thailand. Companies selling goods or providing services may be required to register for VAT once their taxable business revenue exceeds the statutory threshold. Registration creates ongoing obligations, including issuing tax invoices, maintaining VAT records, filing monthly returns, and paying any tax due.
For foreign investors establishing a Thai company, VAT registration should be considered alongside company registration, commercial operations, accounting arrangements, and tax planning. A company may need to register even if it has foreign shareholders, while a business with revenue below the threshold may still qualify for voluntary registration in certain circumstances.
Understanding when registration is required, how to apply, and what compliance entails can help businesses avoid penalties and manage their tax obligations effectively.
1. What Is VAT in Thailand?
VAT is an indirect tax imposed on qualifying sales of goods and provision of services, as well as certain imports. A VAT-registered business generally charges VAT on its taxable supplies and may claim eligible input tax credits for VAT incurred on qualifying business purchases.
The basic calculation is:
VAT payable = Output tax − Eligible input tax
Output tax is the VAT charged or chargeable on taxable sales or services supplied by the business. Input tax is the VAT incurred on eligible purchases and services used in the business, subject to the requirements and restrictions under Thai tax law.
If output tax exceeds eligible input tax, the difference is generally payable to the Revenue Department. If eligible input tax exceeds output tax, the excess may qualify for a tax credit or refund, subject to the applicable rules.
Thailand's standard VAT rate is currently 7%, subject to the applicable statutory provisions and extensions in force at the relevant time. Certain transactions may be zero-rated or exempt from VAT. These categories have different legal consequences and should not be treated as interchangeable.
For example, an export may qualify for a zero rate if the applicable legal conditions are satisfied, whereas an exempt supply is treated under the VAT exemption provisions. The distinction can affect whether input tax can be credited or refunded.
2. Who Must Register for VAT in Thailand?
Under the Thai Revenue Code, a person or business carrying on the sale of goods or provision of services in the course of business may be required to register for VAT.
The principal registration threshold is THB 1.8 million in annual revenue from sales of goods or services, subject to the statutory rules governing the calculation of the relevant revenue and the applicable exemptions.
A business whose relevant revenue exceeds the threshold must generally apply for VAT registration within 30 days from the date the threshold is exceeded.
The threshold should not be assessed solely by reference to accounting profit. It concerns relevant revenue from sales or services, subject to the rules applicable to the business and its transactions.
Businesses should also determine whether their activities are subject to VAT or fall within a statutory exemption. Not every receipt or transaction is necessarily treated in the same way for VAT purposes.
Does the THB 1.8 Million Threshold Apply to Companies?
The threshold is not limited to companies. Depending on the circumstances, it may apply to individuals, partnerships, and other persons carrying on a relevant business.
A Thai limited company should therefore assess its VAT obligations based on the nature of its activities, the relevant revenue, and the applicable statutory provisions.
A company does not automatically become exempt from VAT merely because it is newly incorporated, has not yet generated a profit, or has foreign shareholders.
Are Businesses Below the Threshold Exempt from Registration?
Businesses whose relevant revenue does not exceed THB 1.8 million per year are generally not required to register solely on the basis of that threshold. However, the analysis must take account of the nature of the business and any specific statutory requirements.
Some businesses may be exempt from VAT registration because of the nature of their activities. Other businesses may be eligible to register voluntarily, even though their revenue is below the threshold.
Voluntary registration may be commercially useful where a business incurs significant VAT on purchases or expects to make taxable supplies to VAT-registered customers. However, registration also creates compliance obligations, so the decision should be based on the business's actual circumstances.
Businesses should not assume that all small businesses are treated identically. The relevant VAT treatment depends on the activities carried on and the provisions that apply to those activities.
3. When Must a Business Register for VAT?
The applicable deadline depends on the circumstances.
Registration After Revenue Exceeds the Threshold
Where a business is required to register because its relevant revenue exceeds THB 1.8 million, the application must generally be submitted within 30 days from the date the threshold is exceeded.
Businesses should monitor revenue continuously rather than waiting until the end of the accounting year to assess whether registration is required.
For example, if a business's relevant revenue exceeds the threshold on 10 September, the 30-day registration period is calculated from that date in accordance with the applicable rules. The business should not assume that registration can be postponed until the following month or the next financial year.
Registration Before Business Commencement
Certain businesses may apply for VAT registration before commencing operations.
The Revenue Department recognises circumstances in which a business can demonstrate that it is preparing to carry on taxable activities and has undertaken preparatory actions involving purchases of goods or services subject to VAT. Examples may include constructing a factory or office building or installing machinery.
For qualifying cases, the application may generally be submitted within the prescribed period before the commencement of business, commonly six months before commencement, subject to the applicable conditions and exceptions.
This can be relevant to businesses that incur substantial setup costs before generating revenue. Early registration may allow eligible input tax to be considered under the VAT system, but the business must satisfy the registration requirements and the rules governing input tax credit or refund.
The availability of early registration should be assessed on the evidence and facts of the particular project. It should not be assumed that every newly incorporated company can register in advance without demonstrating the relevant preparations.
4. How to Apply for VAT Registration
VAT registration is administered by the Revenue Department. Applications may be submitted through the applicable online registration service or by filing the required documents with the relevant registration office, subject to the procedures applicable to the business.
The principal application form for ordinary VAT registration is Form VAT 01 (ภ.พ.01). Additional forms or supporting documents may be required depending on the circumstances and the registration procedure.
The general process involves the following steps.
Step 1: Confirm Eligibility and Registration Timing
Before applying, the business should confirm that its activities are subject to VAT and determine whether registration is mandatory or voluntary.
It should also establish the relevant registration deadline and whether the application relates to an existing business that has exceeded the threshold or a business preparing to commence taxable operations.
Step 2: Prepare the Required Documents
The documentation depends on the applicant's legal form, business premises, and circumstances. Commonly required documents may include:
- Company registration documents and details of authorised directors.
- Identification documents of the relevant authorised persons.
- Evidence of the registered or business premises.
- A lease agreement, consent to use the premises, or other evidence of the right to occupy the premises, as applicable.
- Supporting documents concerning the business location, where required.
- Relevant powers of attorney or additional supporting documents, if an authorised representative submits the application.
The Revenue Department may require additional evidence or specific document formats. A company should verify the current checklist before submission rather than relying exclusively on a generic list.
The registered address, actual place of business, and supporting premises documents should be consistent with the information provided to the relevant authorities. Any discrepancy may result in requests for clarification or additional documents.
Step 3: Submit the Application
The business should submit the application through the relevant Revenue Department channel and provide the required supporting documents.
For businesses with multiple places of business, the application and subsequent registration arrangements should take account of the applicable rules for the head office and branches.
The company should retain evidence of submission and monitor any requests for additional information.
Step 4: Obtain the VAT Registration Certificate
Upon successful registration, the business receives a VAT registration certificate, commonly referred to as Form VAT 20 (ภ.พ.20).
The certificate confirms the business's VAT registration and contains relevant registration particulars. The business should check the details carefully and ensure that its name, address, and other information are accurate.
A VAT registration certificate should not be confused with a company registration certificate. Company incorporation and VAT registration are separate procedures serving different legal purposes.
5. What Must a Business Do After VAT Registration?
VAT registration is the beginning of ongoing tax compliance. A registered business must implement appropriate procedures for invoicing, accounting, recordkeeping, and monthly reporting.
Charge VAT on Taxable Supplies
A VAT-registered business must account for VAT on taxable sales of goods and provision of services in accordance with the applicable tax point and valuation rules.
The timing of VAT liability does not necessarily depend solely on when the customer pays. Different rules may apply depending on the nature of the transaction and the relevant tax point.
Businesses should ensure that their contracts, invoices, accounting systems, and payment records reflect the correct VAT treatment.
Issue Tax Invoices
A registered business must issue tax invoices when required by law. A tax invoice must contain the prescribed particulars, which generally include:
- The words “Tax Invoice” in a prominent position.
- The issuer's name, address, and tax identification number.
- The purchaser's name and address, as required for the relevant invoice type.
- The invoice number and other prescribed identifying details.
- A description of the goods or services, including the relevant quantity or value.
- The VAT amount charged or other prescribed tax information.
- The date of issue.
The precise requirements may differ depending on whether a full tax invoice, abbreviated tax invoice, or another permitted document is used.
Businesses should ensure that their invoicing systems comply with the applicable rules. An ordinary receipt or commercial invoice does not automatically qualify as a valid tax invoice for input tax credit purposes.
Maintain VAT Reports
VAT-registered businesses are generally required to prepare and maintain the reports prescribed by the Revenue Code and related regulations.
These commonly include:
Output tax report: Records relevant sales and output tax transactions.
Input tax report: Records eligible purchases and input tax, supported by appropriate documentation.
Goods and raw materials report: Required for businesses to which the relevant inventory reporting requirements apply.
The records should be complete, accurate, and reconcilable with invoices, accounting records, inventory information, and VAT returns.
Businesses should also review whether any input tax is non-creditable under the applicable law. VAT incurred on certain expenses cannot automatically be deducted from output tax merely because the expense was paid by the company.
File Monthly VAT Returns
VAT is generally reported on a monthly tax period, regardless of whether the business made sales or had taxable transactions in that particular month.
The principal domestic VAT return is Form PP.30 (ภ.พ.30). It is generally due within the 15th day of the following month, subject to the applicable filing rules.
Where a business files electronically, it should verify the current electronic filing deadline and any extension that applies to the relevant filing period.
A business should not assume that a month with no sales removes the obligation to file a VAT return. Registered businesses generally need to continue filing the required returns until the relevant obligations have been formally brought to an end under the applicable rules.
Where VAT is payable, payment should be made by the relevant deadline. Filing a return and paying the tax are related but separate compliance steps.
Reconcile Output Tax and Input Tax
Before submitting a return, the business should reconcile its sales, purchases, output tax, and eligible input tax.
If output tax exceeds eligible input tax, the difference is generally payable. If eligible input tax exceeds output tax, the excess may be carried forward or claimed as a refund, subject to the relevant legal conditions and time limits.
The business should retain valid supporting tax invoices and other evidence required to substantiate its claims. Incorrectly claiming input tax can result in additional assessments, penalties, and surcharges.
6. What Happens if a Business Fails to Register on Time?
Failure to register within the statutory deadline can expose a business to tax and compliance risks.
If a business was required to register but failed to do so, the Revenue Department may assess the tax obligations arising from the period of non-compliance in accordance with the applicable law.
The consequences depend on the facts, including when the registration obligation arose, the nature of the transactions, the tax that should have been accounted for, and the applicable penalty and surcharge provisions.
Potential consequences may include:
- VAT liabilities relating to taxable transactions.
- Statutory penalties for failing to comply with registration or filing requirements.
- Surcharges on unpaid tax, where applicable.
- Additional assessments following a tax examination.
- Administrative costs associated with correcting historical records and returns.
A business should not assume that late registration automatically resolves all obligations for the period before registration.
Where the threshold has already been exceeded, the company should review the relevant revenue, transaction dates, and tax records to determine the appropriate corrective steps. The tax treatment of past transactions requires a fact-specific assessment.
It is also important to distinguish between failure to register, failure to issue tax invoices, failure to file returns, and failure to pay tax. These may involve separate legal obligations and consequences.
7. Can a VAT-Registered Business Claim Input Tax?
A VAT-registered business may generally claim eligible input tax against output tax, provided the statutory requirements are satisfied.
Input tax commonly arises from purchases of goods and services used in carrying on the business. However, not every expense that includes VAT qualifies for credit.
The business should verify that the relevant purchase is eligible, the supporting documentation is valid, and the claim is made within the applicable time limit.
Certain categories of input tax are restricted or disallowed under Thai VAT law. For example, VAT relating to specified entertainment expenses may be non-creditable, subject to the applicable provisions.
Where input tax exceeds output tax, the business may be entitled to carry the credit forward or apply for a refund, subject to the relevant conditions. Refund claims should be supported by accurate records and valid tax invoices, as they may be subject to examination by the Revenue Department.
Businesses expecting significant input tax credits, including those undertaking substantial pre-operational expenditure or making qualifying zero-rated supplies, should consider the supporting evidence and potential refund process when planning their tax arrangements.
8. VAT Considerations for Foreign-Owned Companies
A company incorporated in Thailand is generally assessed under the Thai VAT rules applicable to its activities. Foreign ownership does not, by itself, exempt the company from VAT registration.
Foreign investors should consider the following issues when establishing or operating a Thai business.
Business Activities and Revenue
The company should assess whether its sales and services are subject to VAT, whether any exemptions apply, and when the registration threshold is reached.
The tax treatment of cross-border transactions, exports, imports, and services supplied to or received from overseas parties requires particular attention. The place of supply, nature of the transaction, and applicable statutory provisions may affect the VAT treatment.
Foreign Services Used in Thailand
Certain services supplied from abroad and used in Thailand may create Thai VAT obligations for the recipient, depending on the applicable rules.
In relevant cases, the Thai recipient may be required to account for VAT using Form PP.36 (ภ.พ.36). This is distinct from the ordinary monthly PP.30 return and should be assessed separately.
Businesses should review overseas software subscriptions, consultancy services, digital services, and other cross-border arrangements to determine the applicable tax treatment.
Foreign Electronic Service Providers
Non-resident electronic service providers and electronic platforms supplying electronic services to non-VAT-registered customers in Thailand may be subject to a separate VAT registration and reporting regime when the relevant conditions and threshold are met.
The rules applicable to non-resident electronic service providers should not be confused with the ordinary registration procedure for a Thai-incorporated company.
Branches and Business Premises
A business operating from multiple locations should review whether additional branch registration or notification is required.
The company should also ensure that its registered details remain accurate when its premises, business particulars, or other relevant information change.
Accounting and Tax Coordination
Foreign-owned businesses should coordinate VAT records with their accounting and tax reporting systems. Where the company has foreign currency transactions, related-party transactions, imports, exports, or substantial cross-border services, additional reconciliation may be necessary.
Proper documentation can help support the VAT treatment adopted and reduce the risk of inconsistencies between accounting records, commercial contracts, invoices, and tax filings.
9. Common VAT Compliance Mistakes
Several recurring issues can create unnecessary exposure for businesses.
Waiting until year-end to monitor the threshold. The registration deadline generally runs from the date the relevant threshold is exceeded, not from the end of the financial year.
Assuming company incorporation includes VAT registration. Incorporation and VAT registration are separate procedures.
Treating every expense as eligible input tax. Input tax credit depends on statutory eligibility and supporting documentation.
Issuing incomplete tax invoices. Documents that fail to satisfy the applicable requirements may create difficulties for both the issuer and the purchaser.
Failing to file a return for a month with no sales. VAT-registered businesses generally remain subject to monthly filing obligations unless the applicable rules provide otherwise.
Ignoring cross-border services. Payments to overseas service providers may require separate VAT analysis, including whether PP.36 obligations arise.
Failing to update registration particulars. Changes to the registered business information or premises may require notification or other action under the relevant rules.
A structured compliance process should include revenue monitoring, invoice controls, monthly reconciliations, return preparation, payment tracking, and periodic review of registration details.
10. VAT Registration and Compliance Support
VAT registration should be approached as part of the company's wider tax compliance arrangements rather than as a standalone administrative formality.
NATTAPHAK LAW FIRM can assist businesses and foreign investors with reviewing VAT registration requirements, identifying relevant deadlines, preparing registration documentation, and coordinating related corporate and tax compliance matters.
The appropriate scope of assistance depends on the business's activities, premises, revenue, transaction structure, and existing tax position. Businesses that have exceeded the registration threshold without registering, or that have unresolved VAT filings, should obtain a specific review before deciding how to correct the situation.
Early assessment can help a business determine whether registration is mandatory, prepare the necessary documentation, and establish processes for meeting its continuing obligations.
Conclusion
VAT registration in Thailand is an important compliance requirement for businesses carrying on taxable activities. The principal revenue threshold is THB 1.8 million, and a business that exceeds it must generally apply for registration within 30 days.
After registration, the business must comply with ongoing requirements, including charging VAT where applicable, issuing tax invoices, maintaining prescribed reports, and filing monthly VAT returns. Cross-border transactions, non-creditable input tax, and changes to business particulars may require additional attention.
Businesses should monitor revenue and transactions from the beginning of operations, confirm the correct VAT treatment of their activities, and maintain reliable accounting records. Where the registration deadline has been missed or the tax treatment is uncertain, the appropriate corrective steps should be determined based on the facts and applicable law.
This article is provided for general informational purposes only and does not constitute legal or tax advice. VAT requirements and administrative procedures should be verified against the law and Revenue Department guidance applicable to the relevant transaction and filing period.
