Work Permit and Employment Guide

How do you get a work permit in Thailand?

A Thai employer sponsors you for a Non-Immigrant B visa and a work permit from the Department of Employment. The permit is employer and province specific. Companies must generally employ four Thai staff per foreign employee unless BOI promoted. Three consecutive years on a work permit with tax filings makes you eligible for permanent residence, which makes this the only Thai route that accumulates anything.

The two documents

They are separate and both are required.

Non-Immigrant B is the visa. It gives you permission to be in Thailand for employment.

Work permit is the authorisation to work. It comes from the Department of Employment, not Immigration.

You can hold one without the other temporarily, and that gap is a compliance risk. The permit must match the visa and the employer.

Process

1. The Thai company registers with the Department of Employment and demonstrates the need for a foreign employee.
2. The employer applies for the work permit.
3. You apply for the Non-Immigrant B visa abroad, or convert inside Thailand.
4. Enter, then collect the work permit book.
5. Report your address every 90 days.
6. File Thai personal income tax annually.
7. Renew both annually while employed.

The 4 to 1 ratio

The default rule is four Thai employees for every foreign employee. It is waived for BOI promoted companies, for LTR holders, and in some treaty and special economic zone cases.

This ratio is why small Thai companies with a single foreign hire often cannot proceed. A ten person company can support two foreigners, not five.

Salary and qualification

There is no single statutory salary floor. The permit must be for a role that cannot readily be filled locally, and the salary must be appropriate to the position and your nationality. In practice the Department of Employment publishes guidance by nationality and role, and officers apply it.

Degrees or documented experience are expected for most professional roles. Certain occupations are closed to foreigners entirely.

Costs

The employer normally pays the work permit fee. The visa and extensions are usually yours.

Tax

Once you hold a work permit and spend 180 days or more in Thailand, you are a Thai tax resident. Your Thai salary is taxed on the progressive scale, which rises above 30 percent at high incomes.

Filing annually is not optional, and the tax records become part of your permanent residence evidence later. Working without filing quietly destroys the PR route.

Why this route matters disproportionately

Every other Thai long stay route is terminal.

DTV, LTR, O-A, O-X, Privilege Card, SMART Visa. All of them renew or expire. None of them count toward anything.

Non-Immigrant B with a work permit is the only status that produces residence credit. Three consecutive years, with tax filings, and you can apply for permanent residence.

The catch is that permanent residence itself is quota limited to 100 people per nationality per year and discretionary. Eligibility is not a queue position.

Good fit

People with a genuine Thai job offer who intend to build a career or a life. Anyone whose ten year plan involves staying in Thailand permanently. BOI promoted companies, where the ratio is waived. Professionals in fields where a Thai employer genuinely needs foreign expertise.

Poor fit

Remote workers, since there is no Thai employer. Consultants with multiple clients, since the permit is single-employer. People who plan to change jobs frequently, since each change resets the permit and often the residence clock.

Watchpoints

1. The permit is employer and province specific. Changing job means a new permit.
2. Working outside the permitted scope is a criminal offence, not an administrative one.
3. The 4 to 1 ratio blocks most small companies.
4. Tax filings are PR evidence. Not filing undermines the long term plan.
5. 90 day reporting is mandatory and fines accumulate.
6. Some occupations are closed to foreigners.
7. Three years is the minimum for PR eligibility, not a guarantee.

Sources

• Immigration Bureau, non-immigrant B procedures. Checked 2026-10-22.
• Department of Employment, work permit rules and fees. Checked 2026-10-22.
• Revenue Department, tax residence and filing. Checked 2026-10-22.