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Thailand remains one of Southeast Asia’s most attractive markets for foreign investors, but assumptions about ownership, work permits, office addresses and tax can quietly increase the cost of doing business. In 2026, documentation and address-verification requirements are receiving greater attention, while the underlying rules continue to vary depending on the business activity, ownership structure and tax classification.
Understanding these potential costs early can help investors avoid delays, unexpected expenses and structural problems later. Here are seven cost traps to consider before entering the Thai market.
1. Ownership and licensing: the 49% assumption
Thailand does not impose a universal 49% foreign-ownership cap on every business. However, foreign-majority companies conducting activities restricted under the Foreign Business Act may require a Foreign Business Licence (FBL), Foreign Business Certificate (FBC), BOI promotion or another specific exemption.
The Foreign Business Act classifies restricted activities into Lists 1, 2 and 3. The appropriate ownership and licensing route depends on the company’s proposed activities, the nationality of its shareholders and whether an applicable treaty, promotion or exemption is available.
Government fees also vary by category. Published fee bands are generally THB 20,000–250,000 for a List 3 licence and THB 40,000–500,000 for a List 2 licence. A Foreign Business Certificate has a separate government-fee reference of THB 22,000. Professional fees, document preparation, translations and other administrative expenses are additional.
Processing times can also vary. More complex applications may require additional information or government review, so investors should not treat six months as a guaranteed or standard timeframe. During the approval period, rent, salaries and professional fees may continue to accrue.
2. Work permits: the capital-and-staff test
For many Thai companies, a commonly applied benchmark is THB 2 million in fully paid-up registered capital and four Thai employees for each foreign work permit. Foreign-majority companies may face a THB 3 million capital benchmark per foreign employee in some circumstances, while BOI-promoted companies and other special categories may follow different requirements.
The four-to-one staffing ratio is not a substitute for proper employment registration. Thai employees counted for the relevant requirements generally need to be genuine employees registered with the Social Security Office. Companies should confirm the applicable capital, staffing, immigration and work-permit requirements before committing to foreign hires.
Planning for the required capital and related payroll costs from the beginning is safer than treating them as expenses that can be addressed after recruitment.
3. The virtual-office trap
A virtual office is not automatically prohibited, but an address that exists only on paper can create problems when a company applies for VAT registration, registers employees with Social Security or supports a foreign employee’s work-permit and visa application.
Authorities may request evidence that the company has genuine and usable business premises. Depending on the registration, this can include a lease agreement or owner-consent letter, premises details, a location map, photographs and a visible company sign.
Address-verification requirements deserve particular attention in 2026. Reported Department of Business Development guidance indicates that additional consent and ownership or lease documentation may be required when an address is already being used by five or more registered companies or partnerships. This does not mean that every shared office will fail, but it does make documentation and the landlord relationship more important.
Investors should therefore confirm that the landlord permits the address to be used for the relevant registrations before signing contracts or beginning VAT and work-permit filings.
4. Labour costs and severance
Thailand’s minimum wage is not a single nationwide rate. Current rates range from THB 337 to THB 400 per day, depending on location and business type. The THB 400 rate applies in Bangkok, Phuket, Chonburi, Rayong, Chachoengsao and Koh Samui, as well as to certain hotel and entertainment businesses nationwide.
Statutory severance can range from 30 days’ wages after at least 120 days of continuous service to 400 days’ wages for employees with at least 20 years of service. The 400-day figure is the highest length-of-service tier, not a standard payment for every termination. Other factors, including the reason for termination and applicable statutory exceptions, must also be considered.
As a result, a “hire cheap, fire cheap” approach can create unexpected costs. Employers should budget not only for wages, but also for social-security contributions, leave, notice obligations, payroll administration and potential severance.
5. Foreign software and cloud costs: withholding tax and VAT
Payments to foreign software, cloud and service providers require proper tax classification before the final cost can be calculated. A 15% Thai withholding-tax rate may apply to certain Thai-source payments to non-residents, including some royalties or specified service, management or consultancy fees. An applicable double-taxation agreement may reduce or eliminate the domestic rate, depending on the nature of the payment and the recipient’s eligibility.
Separately, imported services used in Thailand may trigger 7% VAT under Thailand’s reverse-charge mechanism. This VAT is not necessarily an irrecoverable expense. A VAT-registered business using the service for taxable activities may be able to claim input-VAT treatment, subject to the applicable rules and documentation.
Investors should therefore avoid automatically adding 15% withholding tax and 7% VAT to every SaaS invoice. The contract, payment classification, treaty position, VAT status and any tax gross-up clause should be reviewed before finalising the technology budget.
6. Real estate is more than rent
Office rent varies significantly by building grade, location, condition and whether the space is fitted or furnished. A 2026 Bangkok market source reports a typical middle rate of about THB 650 per square metre per month, while asking rents vary considerably. A budget of THB 700–1,025 per square metre may be plausible for selected central or higher-grade premises, but it should not be treated as a universal Bangkok CBD rate.
The initial cash requirement may include a security deposit, advance rent, agency or legal fees, fit-out, furniture, utility deposits, signage and technology installation. Two months’ deposit plus one month’s advance rent is a common commercial assumption, but the actual amount is contractual rather than a universal statutory requirement.
Fit-out costs also depend heavily on the required specification. A THB 15,000–20,000 per square metre estimate may be reasonable for some office projects, but investors should obtain quotations before using such figures in a financial model. Occupancy costs can easily exceed the headline rental rate during the first year.
7. Buying an existing company: inherited liabilities
Acquiring an existing company can preserve contracts, licences and operating history, but it can also preserve liabilities. In a share purchase, the company remains the same legal entity, so historical tax exposure, debts, employee obligations, contracts, disputes and regulatory issues generally remain with it, even if they were not immediately apparent during negotiations.
Due diligence should cover tax filings and liabilities, corporate records, ownership, licences, leases, employee records, social-security compliance, customer and supplier contracts, loans, litigation, intellectual property and beneficial ownership. Buyers should also confirm that the proposed ownership structure remains lawful after the transaction.
An asset purchase may limit the liabilities acquired, but it can also require new licences, contract assignments, landlord consent or the transfer of employees and operational assets. The appropriate structure depends on the target company and the investor’s objectives. It should not be selected simply because a “shell company” appears to offer a faster route into the market.
How to stay ahead of these costs
The best way to control hidden costs is to address them before they become operational problems. Foreign investors should:
- Map every proposed business activity against the Foreign Business Act lists before incorporation.
- Compare an ordinary Thai company, FBL, FBC, BOI promotion and other available structures with professional advice.
- Budget for paid-up capital, Thai staffing and payroll obligations before committing to foreign sponsorship.
- Secure a usable office and landlord consent before starting VAT, Social Security or work-permit filings.
- Review withholding tax, VAT, treaty treatment and tax gross-up clauses in foreign software and service contracts.
- Obtain written rent, deposit and fit-out estimates rather than relying on headline rent alone.
- Conduct tax, legal, financial, employment and licensing due diligence before acquiring an existing entity.
Plan Your Thailand Market Entry With Confidence
Hidden costs are easier to manage when they are identified before incorporation, hiring, leasing or acquisition. Kinnaree helps foreign investors assess ownership structures, business licensing, BOI opportunities, property requirements and market-entry considerations so they can make informed decisions before committing capital.
Sources
Sources for this article include the Thailand Board of Investment’s Cost of Doing Business in Thailand guidance on government fee ranges for List 2 and List 3 Alien Business Licences and Foreign Business Certificate fees; Bangkok Metropolitan Administration and Department of Employment guidance on work-permit requirements, including commonly applied paid-up-capital and Thai-employee benchmarks and relevant exceptions; Thailand Ministry of Labour materials and Labour Protection Act guidance on location-specific minimum wages and statutory severance of 30 to 400 days; Thailand Revenue Department guidance and tax memoranda covering VAT on imported digital services, withholding-tax treatment for payments to non-residents, double-taxation agreements and potential input-VAT recovery; Department of Business Development and Revenue Department guidance on registered premises, landlord consent, address verification and VAT-registration documentation; Bangkok office-market reporting on indicative rents and factors affecting deposits and fit-out costs; and Thai legal and tax due-diligence guidance on the treatment of historical tax, contractual, employment, regulatory and litigation liabilities in share and asset acquisitions.