Thailand VAT Guide: When to Register, Collect, and File

What Is VAT in Thailand?

Value Added Tax (VAT) is a consumption tax levied at each stage of the supply chain — from raw materials to the final sale. In Thailand, VAT is governed by the Revenue Code (Part 4) and administered by the Revenue Department (กรมสรรพากร). Every time goods or services change hands in a commercial transaction, VAT is collected and ultimately remitted to the government.

Thailand introduced VAT in 1992, replacing an older Business Tax system. The standard rate set in law is 10%, but the government has maintained a reduced rate of 7% since 1997 through a series of royal decrees that are renewed periodically. As of 2025, the 7% rate remains in effect and is expected to continue.

How VAT Flows Through the Supply Chain

VAT is a multi-stage tax, but the total burden falls on the final consumer. Here is a simple example:

1. Manufacturer produces coffee beans and sells to a wholesaler for ฿100 + ฿7 VAT = ฿107. The manufacturer remits ฿7 to the Revenue Department.
2. Wholesaler buys at ฿107 and sells to a café for ฿200 + ฿14 VAT = ฿214. The wholesaler remits ฿14 − ฿7 (credit for VAT already paid) = ฿7 net.
3. Café buys at ฿214 and sells drinks to customers for ฿400 + ฿28 VAT = ฿428. The café remits ฿28 − ฿14 = ฿14 net.

The total VAT collected at each stage (฿7 + ฿7 + ฿14 = ฿28) equals exactly 7% of the final consumer price. This credit mechanism is the cornerstone of how VAT works — each business in the chain pays only the net VAT on the value it adds, not on the entire transaction amount.

Who Must Register for VAT?

The ฿1.8 Million Threshold

Any person or entity — whether an individual, partnership, company, or foreign business — that sells goods or provides services in Thailand must register for VAT if their annual taxable revenues exceed ฿1,800,000. This threshold applies to aggregate revenues from all VAT-able activities combined.

The threshold is cumulative across a 12-month period, not a calendar year. If you start a business in July and your revenue reaches ฿1.8 million by November, you must register in November — you cannot wait until the following January.

Who Is Exempt from the Registration Requirement?

Even if revenues exceed ฿1.8 million, certain businesses and activities are exempt from VAT entirely and therefore never need to register:

• Businesses whose entire revenue stream consists of VAT-exempt goods or services (see the Exempt Items section below)
• Small traders specifically designated by the Director-General of the Revenue Department
• Certain non-profit organizations and government entities

Voluntary Registration

Businesses with revenue below ฿1.8 million may choose to register for VAT voluntarily. This can be strategically beneficial because:

• Input tax credit: You can reclaim the VAT you pay on business purchases, reducing your effective cost
• Customer perception: Larger corporate clients — especially those that are themselves VAT-registered — prefer to work with suppliers who can issue a proper Tax Invoice (ใบกำกับภาษี), since they need it to claim their own input tax credit
• Banking and contracts: VAT registration strengthens your formal business identity for loan applications and government contracts

The trade-off is increased administrative burden: monthly filing, record-keeping, and tax invoicing requirements apply from the day you register.

How VAT Works: Output vs Input Tax

Once registered, every transaction in your business has two VAT dimensions: output tax (what you collect) and input tax (what you pay). The net amount you remit to the Revenue Department is the difference.

Output Tax (ภาษีขาย)

Output tax is the VAT you charge your customers on your sales. When you issue a Tax Invoice for ฿1,000 + 7% VAT, the customer pays ฿1,070. The ฿70 is your output tax — it belongs to the government, not to you. You hold it temporarily until you file your monthly VAT return.

Input Tax (ภาษีซื้อ)

Input tax is the VAT you pay your suppliers when buying goods or services for your business. If you purchase office supplies for ฿500 + 7% VAT = ฿535, the ฿35 you paid is your input tax. As a VAT registrant, you can use this to offset the output tax you owe.

Net VAT Payable

VAT Payable = Output Tax − Input Tax

Worked Example: Coffee Shop

Let us walk through a real-world example for a coffee shop during one month.

Sales (Output Tax):

• Total coffee and food sold: ฿50,000 (VAT-inclusive)
• VAT collected from customers: ฿50,000 ÷ 1.07 × 0.07 = ฿3,271

Purchases (Input Tax):

• Coffee beans, milk, sugar from supplier: ฿10,000 + 7% VAT → Input tax = ฿700
• Packaging materials: ฿5,000 + 7% VAT → Input tax = ฿350
• Cleaning supplies: ฿1,000 + 7% VAT → Input tax = ฿70

Total Input Tax = ฿700 + ฿350 + ฿70 = ฿1,120

VAT Payable: ฿3,271 (output) − ฿1,120 (input) = ฿2,151 payable to Revenue Department

The café keeps ฿50,000 − ฿3,271 = ฿46,729 as actual revenue. The ฿2,151 net VAT simply passes through to the government.

How to Calculate VAT

There are two common VAT calculation scenarios: adding VAT to a price (when you are setting your selling price) and extracting VAT from a VAT-inclusive amount (when you need to determine the tax component of a total you received).

Adding VAT to a Price (VAT-Exclusive → VAT-Inclusive)

Total Price = Net Price × 1.07

Example: You sell consulting services for ฿20,000 (net). The VAT-inclusive invoice total is: ฿20,000 × 1.07 = ฿21,400 (of which ฿1,400 is VAT)

Extracting VAT from a VAT-Inclusive Price

VAT Amount = Total Price ÷ 1.07 × 0.07

Example: A customer paid ฿5,350 all-in. The VAT component is: ฿5,350 ÷ 1.07 × 0.07 = ฿350 (the net price was ฿5,000)

Quick Reference Table

Net Price (฿)	VAT Amount (7%)	Total with VAT
100	7	107
500	35	535
1,000	70	1,070
5,000	350	5,350
10,000	700	10,700
50,000	3,500	53,500
100,000	7,000	107,000
500,000	35,000	535,000
1,000,000	70,000	1,070,000

VAT on Imported Goods

If you import goods into Thailand, VAT at 7% is calculated on the CIF value plus import duty:

Import VAT = (CIF Value + Import Duty) × 7%

Import VAT paid to Customs can be claimed as input tax on your monthly ภ.พ.30 return, provided you hold the proper customs documentation.

VAT-Exempt Goods and Services

Not everything is subject to Thai VAT. The Revenue Code specifies two distinct categories: items that are exempt from VAT (no VAT applies) and items that are zero-rated (VAT applies at 0%). The distinction matters because only VAT-registered exporters using zero-rating can claim input tax credits — exempt businesses generally cannot.

Zero-Rated (0%) Items

Zero-rated items are VAT-able but at 0%. This means sellers can still register for VAT and claim full input tax credits on their costs.

Category	Examples
Exports	All goods exported from Thailand
International services	Services rendered outside Thailand
International transport	Airlines and shipping companies
Goods sold under diplomatic privilege	Embassy purchases

VAT-Exempt Items

Exempt items sit outside the VAT system entirely. Sellers of exempt goods/services cannot register for VAT and cannot claim input tax on purchases related to those activities.

Category	Specific Items
Agriculture	Unprocessed agricultural products, unprocessed livestock, unprocessed aquatic animals, unprocessed plants
Inputs	Fertilizers, animal feed, pesticides, agricultural chemicals
Reading material	Newspapers, magazines, textbooks
Education	Educational services by approved institutions
Healthcare	Medical and healthcare services, clinical laboratory services
Transport	Domestic passenger transport (bus, rail, boat, domestic flights by rail/road carriers)
Finance	Banking services (interest on deposits/loans), life insurance premiums, securities trading
Rental	Residential property rental (commercial property is VAT-able)
Government	Goods sold by government agencies without fee, public utilities

Filing and Paying VAT Monthly

Form ภ.พ.30 — The Monthly VAT Return

Every VAT-registered business must file Form ภ.พ.30 (Phor.Por.30) once per month, covering all taxable transactions during that calendar month. There are no quarterly options — monthly filing is mandatory regardless of revenue size.

Deadlines:

Filing Method	Deadline
Paper filing at Revenue Department office	15th of the following month
E-filing via efiling.rd.go.th	23rd of the following month

What ภ.พ.30 Covers

The form requires you to report:

• Total output tax — VAT collected from all sales during the month
• Total input tax — VAT paid on all qualifying business purchases during the month
• Net VAT payable — the difference (or refund claimed)
• Details of any zero-rated sales and exempt sales (reported separately)

Multiple Business Locations

If you operate more than one branch, you can file either:

1. A consolidated return for all branches at your head office, or
2. Separate returns for each branch at the local Revenue Department office

Most multi-branch businesses prefer consolidated filing for administrative simplicity.

Keeping VAT Records

You must retain all Tax Invoices (both issued and received), VAT books, and supporting documents for at least 5 years from the filing date. The Revenue Department can audit any period within the 5-year window. Digital record-keeping is accepted, but scanned copies must be legible and complete.

Tax Invoice Requirements

Every sale to a VAT-registered customer requires a Full Tax Invoice (ใบกำกับภาษีเต็มรูป) that includes:

• The words “ใบกำกับภาษี” (Tax Invoice) prominently displayed
• Seller’s name, address, and VAT registration number (เลขประจำตัวผู้เสียภาษี 13 digits)
• Buyer’s name, address, and VAT number (if applicable)
• Invoice number and date
• Description and quantity of goods/services
• Unit price, total value, and VAT amount shown separately
• Grand total including VAT

Claiming Input Tax Credits and Refunds

When You Get a Refund

If your input tax exceeds your output tax in a given month — which commonly happens for exporters, businesses in capital-intensive setup phases, or companies with large one-time purchases — you are entitled to a VAT refund from the Revenue Department.

You have two options when you have excess input tax:

1. Carry forward the credit to offset next month’s output tax
2. Request a cash refund by selecting the refund option on Form ภ.พ.30

Most businesses carry forward small surpluses month-to-month. Cash refunds are more common for exporters who consistently have high input tax and zero-rated output.

How the Refund Process Works

When you request a cash refund, the Revenue Department will:

1. Review your ภ.พ.30 filing and supporting documents
2. Conduct a desk audit (and sometimes a field audit) to verify input tax claims
3. Issue a refund within 30 days for low-risk cases, or 90 days for cases requiring fuller inspection

Common Situations Where Refunds Arise

• Exporters: Zero-rated sales mean output tax is always ฿0, while input tax on production costs can be substantial
• Capital investment: Purchasing machinery, equipment, or a building generates a large one-time input tax spike
• Seasonal businesses: A slow month with few sales but ongoing supply purchases
• Business startup: Early months often have high setup costs before revenue builds

Input Tax That Cannot Be Claimed

Not all VAT you pay qualifies as claimable input tax. The following are blocked input tax situations:

Situation	Reason Input Tax Is Blocked
Purchases for personal use	Not for business purposes
Entertainment expenses above ฿1,000 per occasion per person	Statutory limit
Purchases of passenger cars (≤10 seats)	Specifically excluded by law
Purchases from non-VAT-registered suppliers	No valid Tax Invoice issued
Input tax with incomplete or incorrect Tax Invoice	Missing required fields

Penalties for Late Filing or Non-Registration

Failure to Register

If you cross the ฿1.8 million threshold and fail to register within 30 days, you face:

• Liability for all VAT that should have been collected from the date you should have registered
• Surcharge of 1.5% per month on unpaid VAT (non-compounding, capped effectively at 100% of unpaid tax in some rulings)
• Fine of up to ฿2,000 for the registration violation itself

This can be expensive. A business earning ฿200,000/month with unregistered sales for 6 months owes roughly ฿84,000 in back VAT (7% of 12 months × ฿200K), plus surcharges.

Late Filing of ภ.พ.30

Violation	Penalty
Filing ภ.พ.30 after the 15th (or 23rd for e-filing), but tax is paid in full	Fine of ฿500
Filing late with unpaid or underpaid tax	Fine of ฿500 + 1.5% surcharge per month on unpaid amount
Failure to file	Fine of ฿500 to ฿5,000 (determined by officer) + surcharge

Issuing Incorrect or Fraudulent Tax Invoices

Issuing a Tax Invoice that overstates the VAT amount (used to inflate input tax claims fraudulently) is a serious offense:

• Criminal prosecution under the Revenue Code
• Fine of 2× the overstated amount minimum
• Potential imprisonment in severe cases

Understating Output Tax

Deliberately underreporting sales to reduce output tax liability can result in:

• Assessment of unpaid tax plus 1.5%/month surcharge
• Additional penalty of 100% to 200% of the unpaid tax (depending on intent and officer discretion)

Voluntary Disclosure Reduces Penalties

If you realize you have made an error or missed a filing, voluntary disclosure before the Revenue Department initiates an audit significantly reduces penalties. The Revenue Department has a formal voluntary disclosure program — penalties are reduced to a fraction of what they would be post-audit. Engage a tax consultant to handle this properly.

Summary: VAT Obligations at a Glance

Obligation	Deadline	Penalty for Missing
Register after crossing ฿1.8M threshold	Within 30 days	Back-VAT + 1.5%/mo surcharge + ฿2,000 fine
File ภ.พ.30	15th (paper) / 23rd (e-file)	฿500 fine + 1.5%/mo on unpaid
Issue Tax Invoice	At time of sale	Invalid input claim for buyer; fines for seller
Retain VAT records	5 years from filing	Audit exposure; inability to defend claims

Understanding your VAT obligations from the moment your business crosses the registration threshold is essential. The compliance costs are manageable — the penalties for non-compliance are not. Keep clean records, file on time, and use e-filing to give yourself every available day.