Sole Proprietorship vs Company Limited in Thailand: Which Structure Is Right for You?
Choosing between a sole proprietorship vs company limited is one of the first decisions any entrepreneur faces in Thailand. Both structures are legal, both can operate a business, but they differ significantly in tax treatment, liability, credibility, and whether a foreigner can use them at all.
This guide breaks down the practical differences so you can make the right call for your situation.
The Key Differences at a Glance
| Sole Proprietorship | Private Limited Company | |
|---|---|---|
| Legal status | Not a separate entity. You are the business. | Separate legal entity (juristic person) |
| Liability | Unlimited personal liability | Limited to unpaid share value |
| Tax | Personal income tax (0 to 35%). Simpler tax recording. | Corporate income tax (0 to 20%) |
| Foreign ownership | Generally not available to foreigners but can be applied for as a US citizen or Thai national. | Available via Thai majority, BOI, FBL, or Treaty of Amity |
| Work permit | Cannot sponsor a work permit (with rare exceptions) | Can sponsor foreign work permits |
| Annual audit | Not required | Required by law (licensed CPA) |
| Setup time | 1 to 3 days | 2 to 4 weeks |
| Setup cost | Under 1,000 THB (government fees) | 7,000 to 18,000 THB (government fees) |
| Minimum owners | 1 person | 2 shareholders (since February 2023) |
| Can be sold | No (assets only) | Yes (share transfer) |
Liability: The Biggest Difference Between Sole Proprietorship vs Company Limited
A sole proprietor is personally responsible for every business debt. If the business is sued, your personal assets are at risk: bank accounts, savings, vehicles, everything. There is no legal separation between you and the business.
A limited company is a separate legal entity. Shareholders are only liable up to the unpaid amount on their shares. Once shares are fully paid (which they almost always are), your personal assets are protected. Thai courts have very rarely pierced the corporate veil, making this protection robust in practice.
Directors can face personal liability in specific situations such as fraud, acting beyond their authority, or failing to meet tax or employment obligations. But the shareholder shield itself is strong.
Tax: How Each Structure Is Taxed
A sole proprietor pays personal income tax at progressive rates from 0% to 35% on net income. Expense deductions can be claimed against revenue, but in practice they must be supported by proper documentation. The top rate of 35% applies to net income above 5 million THB.
A limited company pays corporate income tax at 20% on net profit. SME companies (paid-up capital under 5 million THB, revenue under 30 million THB) benefit from reduced rates: the first 300,000 THB of profit is exempt, and 300,001 to 3 million THB is taxed at 15%. When profits are distributed as dividends, a further 10% withholding tax applies.
The practical difference for sole proprietorship vs company limited:
| Sole Proprietorship | Limited Company | |
|---|---|---|
| Tax type | Personal income tax (PIT) | Corporate income tax (CIT) |
| Rate | Progressive: 0% to 35% | Flat: 15 to 20% (SME rates available) |
| Tax on withdrawals | None (it is your money) | 10% dividend withholding tax |
| Expense deductions | Actual documented expenses | Actual documented expenses |
The company limited generally offers more flexibility with tax. You can pay yourself a salary (deductible against CIT), retain profits in the company at the lower CIT rate, time dividend distributions to suit your situation, and take advantage of SME reduced rates if you qualify. A sole proprietor has none of these options. All profit is taxed as personal income in the year it is earned, regardless of whether you need the money or not. For most business owners earning above a modest level, this flexibility makes the company structure more tax efficient overall.
Can Foreigners Use a Sole Proprietorship?
In almost all cases, no. Sole proprietorships in Thailand are generally restricted to Thai nationals. The only notable exception is U.S. citizens operating under the US-Thailand Treaty of Amity, who may register a sole proprietorship in most industries.
For all other foreign nationals, the private limited company is the standard route. Foreign ownership above 49% requires authorization through one of four pathways:
- Thai majority company with 51%+ genuine Thai shareholders
- BOI promotion allowing 100% foreign ownership with tax incentives
- Foreign Business Licence for service businesses outside BOI categories
- Treaty of Amity for American-controlled companies or Thai Only Structures
One important note for 2026: Thailand's crackdown on nominee shareholders has intensified significantly. Between September 2024 and May 2025, authorities investigated over 860 cases. Thai shareholders in your company must be genuine investors with verifiable capital, not names on paper.
Work Permits and Banking
A Thai limited company can sponsor foreign work permits through a well-established process. Requirements include 2 million THB in paid-up registered capital per foreign employee and a general 4:1 ratio of Thai to foreign staff (BOI-promoted companies are exempt from both and lower requirements apply to Thai Wife Non-O visa holders).
A sole proprietor generally cannot sponsor their own work permit. Even in the rare Treaty of Amity case, while they are permitted to work they do not hold a work permit.
Banking follows a similar pattern. Thai banks routinely open corporate accounts for registered companies. Sole proprietors, particularly foreign ones, face significantly more difficulty opening business bank accounts and accessing credit facilities.
Compliance and Running Costs
The sole proprietorship wins on simplicity. Annual obligations are limited to a personal tax return (due 31 March), plus monthly VAT and withholding tax filings if applicable. No statutory audit is required. Typical annual compliance costs run 5,000 to 30,000 THB.
A limited company has far more obligations: monthly bookkeeping, monthly tax filings, a mandatory annual CPA audit, financial statements filed with the DBD, corporate tax returns (PND 50 and PND 51), an Annual General Meeting, and social security contributions for employees. Typical annual compliance costs run 80,000 to 200,000+ THB.
This is the trade-off: the corporate shield and credibility come with a real administrative cost.
So Which Should You Choose?
For most foreign entrepreneurs, the answer is straightforward: the private limited company. It is the only structure that gives you liability protection, work permit eligibility, credibility with Thai banks and landlords, and a business you can eventually sell. The 2023 reform reducing minimum shareholders from three to two has made setup simpler than ever.
The sole proprietorship makes sense in a narrow set of circumstances: Thai nationals running small businesses who want minimal compliance costs and simpler tax filing.
Not sure which structure fits your situation? Attori Law handles both. See our company registration services, read more about sole proprietorships, or get in touch for a free consultation.
Frequently Asked Questions
Can a foreigner register a sole proprietorship in Thailand?
Generally no. The exception is U.S. citizens operating under the Treaty of Amity, who can register a sole proprietorship in most industries. All other foreign nationals need a company structure.
Is a sole proprietorship cheaper to run than a company?
Yes, significantly. Annual compliance costs for a sole proprietorship are typically 5,000 to 30,000 THB versus 80,000 to 200,000+ THB for a limited company. The difference is mainly the mandatory annual audit and monthly bookkeeping.
At what income level does a company become more tax efficient?
It depends on your specific expenses, but as a general rule, businesses with higher net profits benefit from the company structure. The combined CIT-plus-dividend rate caps at around 28%, compared to the top PIT rate of 35%. At lower profit levels the difference is smaller and the sole proprietorship's lower compliance costs may offset any tax gap. Speak to an accountant to model your specific situation.
Can I convert a sole proprietorship into a company later?
There is no direct conversion process. You would register a new limited company and transfer the business assets to it. This is worth planning for if you expect the business to grow beyond the sole proprietorship's practical limits.
How many shareholders does a Thai company need?
Two, since the February 2023 reform. Previously three were required. This simplifies company formation significantly, especially for foreign entrepreneurs who previously needed a third shareholder purely to meet the legal minimum.