Work Permit in Thailand: the documents you actually need

A plain checklist so you do not make two trips to the office.

A Work Permit is the document that gives a foreign national the legal right to work in Thailand. Your visa lets you enter and stay; your Work Permit lets you work. They are two separate documents, and you need both.

This guide walks through exactly what is required in practice — the paperwork, the timing, the reasons applications get rejected, and what happens if you skip it.

Who needs a Work Permit?

Any foreign national who performs work in Thailand needs a Work Permit, with very few exceptions. That includes:

• Employees of a Thai company, even if the salary is paid from overseas
• Foreign staff of a Thai branch of an overseas company
• Business owners and company directors who carry out day-to-day work
• Freelancers and contractors who work for Thai clients from Thailand

A common misunderstanding is that a Non-B visa is enough. It is not. A Non-B visa without a Work Permit means you may stay in Thailand, but you may not legally work.

The document checklist

The exact list depends on your employer and your job title, but in practice the same core set comes up every time.

Personal documents:

• Passport valid for at least six months, with at least one full blank page
• A Non-B visa (or the correct visa category for your purpose)
• Medical certificate issued within the last three months
• Four to six photographs, 4 x 6 cm, taken within the last six months
• Copies of your educational certificates (degree or diploma)
• A CV or résumé showing your work history, preferably with references

Employer documents:

• Company affidavit (หนังสือรับรองบริษัท) issued within the last three months
• Company registration certificate and shareholder list
• VAT registration certificate (ภ.พ.20)
• A job description on company letterhead
• Your employment contract or offer letter
• For some positions, evidence that the employer has the right ratio of Thai to foreign staff

Depending on your occupation, the Department of Employment may request additional documents — for example a professional licence for teaching, nursing or engineering roles. That single extra document is one of the most common causes of delay.

How long it takes

Typically two to four weeks from the moment all documents are complete. The word to focus on is complete. Applications are not returned because of the patient's nationality; they are returned because a document is missing, expired or does not match what is written elsewhere in the file.

Why applications get rejected

Five reasons come up again and again:

• The medical certificate is older than three months
• The company affidavit has expired
• The job title on the employment contract does not match the one on the application form
• The photographs do not meet the specification
• The company does not meet the staffing or capital requirements for the position

Every one of these is avoidable. A short review of the file before submission saves weeks.

Fees you should expect

Government fees are fixed and published. The Work Permit itself is issued annually, and the fee depends on the validity period you request. Renewal must be done before expiry — working on an expired permit is treated the same as working without one.

Our own service fees are quoted in advance and depend on the complexity of the case. There is no charge for the first consultation.

What happens if you work without one

The penalties fall on both the employee and the employer:

• Fines for the employee, calculated per day of illegal work
• Fines for the employer for each foreign employee without a permit
• Immediate deportation in serious cases
• A ban on re-entering Thailand, which in the most serious cases reaches five years

The risk is not worth the saving. A properly prepared application costs less than a single fine.

Work Permit, Visa and 90-Day Report — how they fit together

Foreigners mix these up constantly, and it is easy to see why. The three work as a system:

• The Non-B visa gives you permission to enter and stay in Thailand for the purpose of employment
• The Work Permit gives you permission to work
• The 90-Day Report is your address check-in while you are staying here

If any one of the three lapses, the other two become vulnerable. This is why the most useful question to ask is never "can I get a work permit" but "is the whole set up to date".

Changing employer later

A Work Permit is tied to a specific employer and a specific job title. If either changes, the permit must change too — transferring the permit is not automatic and there are notification deadlines. Doing it late is the single most common way people slip into non-compliance while believing everything is in order.

How we help

We prepare the file, check it against the current requirements, submit it, follow up with the Department of Employment and hand you the result. You keep working; we handle the queue.

If you already have a Work Permit we will review it and tell you honestly whether anything needs attention before your next renewal — free of charge.