Work Permits in Thailand: Rules, Penalties and Employer Duties
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The Governing Law
Foreign employment is governed by the Emergency Decree on the Management of Foreign Workers' Employment, which replaced the earlier Working of Aliens Act. The Decree was substantially amended in 2018 after the original penalties were criticised as disproportionate, having been set at levels comparable to human trafficking offences and having caused significant disruption to households, agriculture, and small businesses.
That history matters when reading online guidance. Sources still citing imprisonment of up to five years for working without a permit are quoting the repealed Act, not current law.
The Two Core Prohibitions
The Decree contains two parallel prohibitions, one aimed at the worker and one at the employer.
A foreigner is prohibited from working without a work permit, and equally from working outside the scope of what they are entitled to do.
Separately, no person may accept a foreigner into work who does not hold a work permit, or allow a foreigner to work outside the scope of what they are entitled to do.
The second limb of each prohibition is the one businesses overlook. Holding a valid work permit is not sufficient by itself. Working outside its scope, for a different employer, in a different role, or at a location not covered, is an offence in its own right.
Penalties for the Foreign Worker
A foreigner who works without a permit or outside the permitted scope is liable to a fine of between five thousand and fifty thousand baht. Once the fine is paid, the foreigner is to be sent out of the Kingdom without delay, subject to defined exceptions for certain categories of workers under the Decree.
This is the key change from the repealed legislation: the offence is now punishable by fine rather than imprisonment. Deportation, however, remains the standard consequence.
The Decree also provides a settlement route. Where the foreigner accused of the offence agrees to leave the Kingdom, the inquiry official may compound the case in accordance with criteria set by a joint committee and notify the Department of Employment, and once the foreigner has departed, the case is deemed terminated.
An important protection applies to victims and witnesses in human trafficking cases, who are excluded from the penalty provision.
Penalties for the Employer
Employer liability is materially heavier, and it is calculated per worker.
A person who accepts a foreigner into work in breach of the prohibition is liable to a fine of between ten thousand and one hundred thousand baht per foreign worker employed.
For a repeat offence the consequences escalate sharply: imprisonment of up to one year, or a fine of between fifty thousand and two hundred thousand baht per foreign worker, or both, and the offender is banned from employing foreign workers for three years from the date the judgment becomes final.
A three-year hiring ban is, for many businesses in tourism, hospitality, construction, and agriculture, more damaging than any fine.
The Decree does contain a limited carve-out: a person residing in the same household as the person who accepted the foreigner into work is not to be treated as a principal, instigator, or supporter of the offence.
Immigration Consequences Run in Parallel
Work permit offences do not exist in isolation. Under the Immigration Act, a foreigner who remains in the Kingdom without permission, or whose permission has expired or been revoked, is liable to imprisonment of up to two years, a fine of up to twenty thousand baht, or both.
This matters because a work permit is usually tied to the visa that supports it. When employment ends, the permission to stay that depended on it can lapse, and a foreigner who assumes they retain lawful status can find themselves committing an immigration offence while dealing with an employment issue. The two must be managed together.
What Counts as Work
Foreigners consistently underestimate how broadly work is understood in practice. Activity that is unpaid, part-time, informal, or done for a friend's business can still fall within the prohibition, and the absence of a salary does not by itself put an activity outside it.
The safe approach for anyone whose immigration status is not employment-based is to obtain advice before beginning any activity that could be characterised as work, rather than assuming that informality provides protection.
Practical Duties for Employers
Verify that every foreign employee holds a valid work permit before their first day, not afterwards, and keep copies on file. Check that the permit matches the actual role, employer, and workplace, because scope breaches are separate offences. Track expiry dates and begin renewals well in advance. Update the authorities when a role, workplace, or employment status changes. Manage the end of employment carefully, since termination affects both the permit and the employee's immigration status. And treat contractors and agency staff with the same scrutiny as direct employees, because accepting a foreigner into work is not limited to formal employment relationships.
Practical Duties for Foreign Employees
Do not begin work before the permit is issued, and confirm what the permit actually authorises rather than assuming it covers everything you might be asked to do. Keep your own copies of the permit and visa documents rather than relying entirely on your employer. Raise scope changes with your employer before taking on new duties. And take advice immediately if your employment ends, because your right to remain in Thailand may end with it.
Frequently Asked Questions
Can I go to prison for working without a work permit?
Under the current Decree the offence is punishable by a fine of between five thousand and fifty thousand baht, after which the foreigner is deported. Sources citing imprisonment of up to five years are quoting repealed legislation.
What does it cost an employer to hire someone without a permit?
A fine of between ten thousand and one hundred thousand baht per foreign worker. A repeat offence carries up to one year imprisonment or a fine of between fifty thousand and two hundred thousand baht per worker, or both, plus a three-year ban on employing foreign workers.
My employee has a work permit but I want to move them to another role. Is that allowed?
Not automatically. Allowing a foreigner to work outside the scope of what they are entitled to do is an offence for both the worker and the employer, so the permit must be updated first.
What happens if I am caught but agree to leave Thailand?
The Decree allows the inquiry official to compound the case where the foreigner agrees to depart, and once they have left the Kingdom the case is deemed terminated.
Does unpaid work require a permit?
The absence of payment does not by itself take an activity outside the prohibition. Take advice before undertaking any activity that could be characterised as work.
Speak to a Thai Employment and Immigration Lawyer
Work permit problems are almost always cheaper to prevent than to resolve, and for employers the exposure multiplies with every worker. Our bilingual lawyers advise on work permit applications and renewals, scope and role changes, employer compliance audits, and representation where an enforcement issue has already arisen, alongside the immigration consequences that run in parallel. Contact us before a foreign hire starts work.
Disclaimer
This article provides general legal information only and does not constitute legal advice. Work permit requirements and penalties depend on the category of worker and the facts of each case. Please consult a licensed Thai attorney before acting.
Foreign employment is governed by the Emergency Decree on the Management of Foreign Workers' Employment, which replaced the earlier Working of Aliens Act. The Decree was substantially amended in 2018 after the original penalties were criticised as disproportionate, having been set at levels comparable to human trafficking offences and having caused significant disruption to households, agriculture, and small businesses.
That history matters when reading online guidance. Sources still citing imprisonment of up to five years for working without a permit are quoting the repealed Act, not current law.
The Two Core Prohibitions
The Decree contains two parallel prohibitions, one aimed at the worker and one at the employer.
A foreigner is prohibited from working without a work permit, and equally from working outside the scope of what they are entitled to do.
Separately, no person may accept a foreigner into work who does not hold a work permit, or allow a foreigner to work outside the scope of what they are entitled to do.
The second limb of each prohibition is the one businesses overlook. Holding a valid work permit is not sufficient by itself. Working outside its scope, for a different employer, in a different role, or at a location not covered, is an offence in its own right.
Penalties for the Foreign Worker
A foreigner who works without a permit or outside the permitted scope is liable to a fine of between five thousand and fifty thousand baht. Once the fine is paid, the foreigner is to be sent out of the Kingdom without delay, subject to defined exceptions for certain categories of workers under the Decree.
This is the key change from the repealed legislation: the offence is now punishable by fine rather than imprisonment. Deportation, however, remains the standard consequence.
The Decree also provides a settlement route. Where the foreigner accused of the offence agrees to leave the Kingdom, the inquiry official may compound the case in accordance with criteria set by a joint committee and notify the Department of Employment, and once the foreigner has departed, the case is deemed terminated.
An important protection applies to victims and witnesses in human trafficking cases, who are excluded from the penalty provision.
Penalties for the Employer
Employer liability is materially heavier, and it is calculated per worker.
A person who accepts a foreigner into work in breach of the prohibition is liable to a fine of between ten thousand and one hundred thousand baht per foreign worker employed.
For a repeat offence the consequences escalate sharply: imprisonment of up to one year, or a fine of between fifty thousand and two hundred thousand baht per foreign worker, or both, and the offender is banned from employing foreign workers for three years from the date the judgment becomes final.
A three-year hiring ban is, for many businesses in tourism, hospitality, construction, and agriculture, more damaging than any fine.
The Decree does contain a limited carve-out: a person residing in the same household as the person who accepted the foreigner into work is not to be treated as a principal, instigator, or supporter of the offence.
Immigration Consequences Run in Parallel
Work permit offences do not exist in isolation. Under the Immigration Act, a foreigner who remains in the Kingdom without permission, or whose permission has expired or been revoked, is liable to imprisonment of up to two years, a fine of up to twenty thousand baht, or both.
This matters because a work permit is usually tied to the visa that supports it. When employment ends, the permission to stay that depended on it can lapse, and a foreigner who assumes they retain lawful status can find themselves committing an immigration offence while dealing with an employment issue. The two must be managed together.
What Counts as Work
Foreigners consistently underestimate how broadly work is understood in practice. Activity that is unpaid, part-time, informal, or done for a friend's business can still fall within the prohibition, and the absence of a salary does not by itself put an activity outside it.
The safe approach for anyone whose immigration status is not employment-based is to obtain advice before beginning any activity that could be characterised as work, rather than assuming that informality provides protection.
Practical Duties for Employers
Verify that every foreign employee holds a valid work permit before their first day, not afterwards, and keep copies on file. Check that the permit matches the actual role, employer, and workplace, because scope breaches are separate offences. Track expiry dates and begin renewals well in advance. Update the authorities when a role, workplace, or employment status changes. Manage the end of employment carefully, since termination affects both the permit and the employee's immigration status. And treat contractors and agency staff with the same scrutiny as direct employees, because accepting a foreigner into work is not limited to formal employment relationships.
Practical Duties for Foreign Employees
Do not begin work before the permit is issued, and confirm what the permit actually authorises rather than assuming it covers everything you might be asked to do. Keep your own copies of the permit and visa documents rather than relying entirely on your employer. Raise scope changes with your employer before taking on new duties. And take advice immediately if your employment ends, because your right to remain in Thailand may end with it.
Frequently Asked Questions
Can I go to prison for working without a work permit?
Under the current Decree the offence is punishable by a fine of between five thousand and fifty thousand baht, after which the foreigner is deported. Sources citing imprisonment of up to five years are quoting repealed legislation.
What does it cost an employer to hire someone without a permit?
A fine of between ten thousand and one hundred thousand baht per foreign worker. A repeat offence carries up to one year imprisonment or a fine of between fifty thousand and two hundred thousand baht per worker, or both, plus a three-year ban on employing foreign workers.
My employee has a work permit but I want to move them to another role. Is that allowed?
Not automatically. Allowing a foreigner to work outside the scope of what they are entitled to do is an offence for both the worker and the employer, so the permit must be updated first.
What happens if I am caught but agree to leave Thailand?
The Decree allows the inquiry official to compound the case where the foreigner agrees to depart, and once they have left the Kingdom the case is deemed terminated.
Does unpaid work require a permit?
The absence of payment does not by itself take an activity outside the prohibition. Take advice before undertaking any activity that could be characterised as work.
Speak to a Thai Employment and Immigration Lawyer
Work permit problems are almost always cheaper to prevent than to resolve, and for employers the exposure multiplies with every worker. Our bilingual lawyers advise on work permit applications and renewals, scope and role changes, employer compliance audits, and representation where an enforcement issue has already arisen, alongside the immigration consequences that run in parallel. Contact us before a foreign hire starts work.
Disclaimer
This article provides general legal information only and does not constitute legal advice. Work permit requirements and penalties depend on the category of worker and the facts of each case. Please consult a licensed Thai attorney before acting.
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