Specific Business Tax in Thailand: Does It Apply to You?

If your business involves selling property or earning income from lending, you may have noticed that VAT does not always appear in the conversation. That is not an oversight. Thailand operates a parallel tax system called Specific Business Tax, or SBT, which replaces VAT entirely for certain categories of business. Getting this wrong — paying the wrong tax, filing under the wrong system, or missing SBT obligations altogether — creates compliance gaps that the Revenue Department can and does pick up. This checklist-style guide walks you through what SBT is, which businesses it covers, how the rates work, and what your practical obligations look like.

What Is Specific Business Tax and Why Does It Exist?

SBT is a turnover-based tax governed by the Revenue Code of Thailand. It was designed to capture tax revenue from industries where VAT is considered unsuitable, usually because the nature of the income makes it difficult to track input and output tax in the conventional way. Rather than charging VAT at 7 percent on sales and then claiming input credits, businesses subject to SBT pay a fixed percentage of their gross receipts directly to the Revenue Department, with no input tax credit mechanism involved.

The result is a simpler calculation but one that requires you to be completely clear about whether your business falls under the SBT regime. If you are VAT-registered and also conducting SBT-liable activities, the two systems run separately. You cannot offset one against the other, and you cannot fold SBT revenue into your VAT return.

Which Businesses Are Subject to SBT?

The Revenue Code specifies a defined list of business categories subject to SBT. For most foreign-owned companies and expat investors in Thailand, the two most relevant categories are financial businesses and real estate sales. Other categories include pawn brokerage, life insurance, and certain securities businesses, but these are less commonly encountered in day-to-day practice.

A financial business for SBT purposes includes commercial banking, finance companies, credit foncier companies, and any business that regularly lends money and earns interest income. The key word is regularly. A one-off loan to a related party may or may not trigger SBT, but if your company's business model involves earning interest from multiple loans or financing arrangements, the Revenue Department is likely to view that as a financial business activity subject to SBT.

Real estate sales are the other major area. SBT applies when a company or individual sells immovable property in a commercial manner. This generally means selling property that was held for less than five years, or selling property that forms part of a trading business. The five-year threshold is relevant to individuals specifically, and the rules interact with land department transfer fees and withholding tax in ways that require careful planning before any transaction completes.

SBT Rates You Need to Know

The rates are set in the Revenue Code and have remained relatively stable. For banking and similar financial businesses, the SBT rate is 3 percent of gross receipts, with an additional 10 percent local development tax applied on top of the SBT amount. This brings the effective rate to 3.3 percent. For finance and securities businesses the same 3 percent plus local tax applies. For real estate sales conducted in a commercial manner, the rate is also 3 percent of gross receipts, again with the local development tax adding 0.3 percent for an effective rate of 3.3 percent.

These rates apply to gross receipts, not profit. That distinction matters significantly. If your company sells a property for 10 million baht, SBT is calculated on the full 10 million, not on the gain you made after deducting the purchase price or development costs. This is one reason why SBT liability needs to be factored into deal pricing and cash flow planning well before a transaction closes.

Your Practical SBT Compliance Checklist

Working through the following points will help you identify your obligations and spot any gaps in your current compliance position.

First, confirm whether your business activity appears on the SBT list in the Revenue Code. Do not assume that because you are VAT-registered you are automatically exempt from SBT. The two systems can apply simultaneously to different revenue streams within the same company.

Second, review your income sources. If your company earns interest income from loans, even loans to group companies or directors, consider whether that activity is regular enough to constitute a financial business. Take specific advice if you are unsure, because the threshold between incidental interest income and a taxable financial business is not always obvious from the law alone.

Third, check the holding period if you are involved in property transactions. For corporate sellers, the five-year exemption that applies to individual sellers does not automatically apply in the same way. Corporate property sales in a commercial context are generally subject to SBT regardless of how long the property was held.

Fourth, make sure SBT returns are filed on time. SBT is reported monthly using form PP.30, the same form used for VAT, but submitted under the SBT category. The deadline is the 15th of the following month. Late filing attracts surcharges and penalties.

Fifth, check that land department transactions are handled correctly. When SBT applies to a property sale, it is typically collected at the land department at the point of transfer. However, this does not remove the obligation to also file a monthly return if your business is registered as subject to SBT. Coordinating between the land department payment and your Revenue Department filings is an area where mistakes happen.

Sixth, if you are restructuring your business or changing its activities, consider whether the change triggers SBT registration for the first time. Businesses that become subject to SBT must register with the Revenue Department before beginning those activities.

How SBT Interacts With Corporate Income Tax

Paying SBT does not replace your corporate income tax obligation. SBT is a tax on gross revenue, while corporate income tax is a tax on net profit. Both apply independently. However, SBT paid during the year is deductible as a business expense when calculating your taxable profit for corporate income tax purposes. This means keeping accurate records of SBT payments is not just a compliance requirement but also directly affects your corporate tax position.

Getting the Classification Right

The practical challenge for many businesses is that the boundary between SBT and VAT is not always immediately obvious, particularly for companies that earn mixed types of income or that are expanding into new activities. A company that starts as a property developer and then begins offering vendor financing to buyers, for example, may suddenly find itself with both VAT-liable and SBT-liable income streams that need to be tracked and reported separately.

If your business touches real estate, lending, or financial services in Thailand, taking the time to confirm your SBT position with a qualified tax adviser is a straightforward step that avoids far more complicated problems later. The Revenue Department's audit focus on property transactions and financial arrangements has been consistent, and correct classification from the outset is always easier than correcting it after the fact.