VAT in Thailand: registration and reality

Rate and threshold

The standard rate is 7 percent, a long-standing reduction from the statutory 10 percent, renewed by cabinet on a rolling basis. Registration becomes compulsory once annual turnover from VATable activity exceeds 1.8 million baht, and the registration must be made within 30 days of crossing the line. Exports and international transport are zero-rated; a defined list of activities, including much of education, healthcare, domestic transport and the leasing of immovable property, is exempt. Exempt is the unfavourable category: an exempt business charges no VAT but also recovers none of the VAT it pays. The threshold is measured on VATable turnover, not profit, and crossing it creates the obligation immediately; businesses approaching the line should register on their own timing rather than the Revenue Department's.

How the mechanics work

A registered business charges 7 percent output VAT on its sales and recovers the input VAT on its purchases; each month it pays the difference, or carries forward or reclaims the excess. Three practical points matter more than the theory.

• Tax invoices are formal. A valid tax invoice must carry the prescribed particulars, including both parties' names, addresses and tax ID numbers and the words tax invoice in Thai. A defective invoice means a lost credit, discovered at audit rather than at the time.
• Some input VAT is never creditable: entertainment expenses, passenger cars for most businesses, and purchases unsupported by proper invoices. These become costs.
• Timing follows the tax point. For goods, generally delivery; for services, generally payment. Service businesses account for VAT on cash received, which softens the cash flow burden of slow-paying customers.

Imports carry VAT at customs regardless of the importer's registration. Services bought from abroad and used in Thailand trigger a reverse-charge filing (PP 36): the Thai payer remits the 7 percent itself, then recovers it as input tax the following month if registered. Unregistered companies and exempt businesses bear that cost outright. Registration also attaches to specific premises; moving office or opening a branch means amending it, a detail that surfaces when an invoice shows the wrong address and a customer's credit fails.

The monthly filing

The VAT return, form PP 30, is due by the 15th of the following month, with e-filing earning roughly eight extra days. Filing is required every month once registered, including nil months. Input and output tax reports and the underlying invoices must be maintained ready for inspection. Late filing draws a small fixed fine plus a surcharge of 1.5 percent per month on tax due, and penalties scale sharply where output tax was collected but not remitted. Refund positions, common for exporters, are legitimate but routinely trigger desk audits; exporters should build the documentation habit before the first claim, not after.

Adjustments, credit notes and records

Price changes after invoicing run through formal debit and credit notes, which carry the same particulars discipline as tax invoices and adjust the month in which they are issued. Copies of every tax invoice issued, originals of every one received, and the monthly input and output reports must be kept at the place of business for at least five years, and inspections begin by sampling exactly this file. Electronic tax invoices under the e-tax invoice system are increasingly standard for larger businesses and remove most of the clerical failure modes, at the price of some setup effort.

When voluntary registration helps

Below the threshold, registration is a choice, and often a good one.

Registration is also an identity: the company appears in the VAT system, files monthly forever, and deregistration is its own process. Register when the arithmetic or the work permit file demands it, not reflexively on day one.

Keeping it clean

VAT problems in Thailand are almost never conceptual; they are clerical, an invoice missing a tax ID, a credit claimed a month early, a nil return skipped. The cure is a bookkeeper who treats the invoice file as the asset it is. Asia Global Partners arranges registration, monthly compliance and refund handling for client companies through vetted accounting partners, with our own oversight where the amounts justify it.

This briefing is general information, not legal, tax or investment advice. Thai rules change frequently and individual cases differ. Verify current requirements with the relevant authorities, including the Immigration Bureau, the Board of Investment, the Land Department, the Department of Business Development and the Revenue Department, and take advice on your own facts before acting.