Company Registration vs Sole Proprietor: Which Should an SME Choose?

Sole proprietor vs limited company compared on tax, credibility, liability and accounting duties, with signs it is time to register and first steps.

An online bakery that started by selling to friends one day gets an order from a large company for 500 New Year gift boxes. The purchasing team asks one question: can you issue a tax invoice as a company? That question makes the owner think seriously about whether to keep going as a sole proprietor or whether it is time to register a company.

How the two forms differ

As a sole proprietor you do business in your own name and business income is your personal income. A limited company is a legal entity separate from you, with its own accounts, tax and liability.

Sole proprietor

• Pros: quick to start, lower costs and less paperwork, easy to change or stop the business.
• Tax: progressive personal income tax. According to the Revenue Department, the top rate is 35% on net income above 5,000,000 baht.
• Limits: some corporate clients prefer to deal with legal entities, and business debts are tied to your personal assets.

Limited company

• Pros: more credible to corporate clients and government agencies, a clear split between business and personal money, and shareholders' liability is limited to any unpaid value of their shares.
• Tax: the Revenue Department states that companies with paid-up capital of no more than 5 million baht and revenue from goods and services of no more than 30 million baht per accounting period pay tiered corporate income tax: net profit up to 300,000 baht is exempt, the portion over 300,000 up to 3,000,000 baht is taxed at 15%, and the portion over 3,000,000 baht at 20%.
• Duties: proper bookkeeping, an auditor, annual financial statements, and monthly accounting firm fees.
• Founders: Thai PBS reports that since 7 February 2023 the law requires a minimum of 2 promoters, down from 3.

Do not compare tax rates alone, because the bases differ. Individuals deduct expenses and allowances, while a company has accounting costs and a second layer of tax when you take money out as salary or dividends. Have an accountant calculate it from your real numbers.

Signs it is time to consider registering

1. Corporate clients ask for documents from a legal entity, and they matter a lot to your revenue.
2. Profit is pushing your personal tax into much higher brackets: ask an accountant to compare both options.
3. The business carries risk or high-value contracts: you want to separate liability from personal assets.
4. You have partners or want to raise funds: a share structure makes ownership clear.
5. You will hire several permanent staff: payroll and benefits are easier to run systematically under a company.

VAT applies whichever you choose

A Revenue Department guide states that businesses with revenue from goods or services over 1.8 million baht a year must apply for VAT registration within 30 days of exceeding it. This applies to both individuals and companies.

Common mistakes

• Registering too early when income is still uncertain, then paying accounting fees every month.
• Registering a company but still receiving customer payments into a personal bank account, mixing the books.
• Assuming a company always pays less tax without calculating tax on taking money out.
• Not writing a shareholders' agreement with partners on ownership, authority and exit.

The best business form is the one that fits your size and plans today, not the one that looks biggest.

How to start

1. Summarise the last 12 months of revenue, costs and profit, plus next year's revenue plan.
2. Ask an accountant or tax adviser to calculate tax for both options from real numbers.
3. If you decide to register, check the latest steps and fees with the Department of Business Development, which accepts online registration.
4. Open a bank account in the company's name and separate personal and business money from day one.
5. Set up a system for documents, receipts, tax invoices and a monthly tax filing calendar.

This article is general information; rates and conditions may change, so consult an accountant or tax professional before deciding. See related courses on Plants.work Learn, such as How much capital to register a company, Business law and company registration basics and Taxes every SME should know, or read next: Tax essentials for online sellers.