Important Legal Consequences of Hiring Undocumented Foreign Workers in Thailand [Updated 2025]

Foreign Labor

Hiring foreign workers is common across many industries in Thailand. However, the process must strictly follow Thai labor and immigration laws. Employing foreign nationals without a valid Work Permit—commonly referred to as illegal employment—results in serious penalties affecting both employers and employees. Beyond financial fines, such violations can harm a company’s credibility and business operations. This article summarizes key legal penalties under the Foreigners’ Working Management Emergency Decree B.E. 2560 (2017) and its latest amendments [Updated 2025], which every employer should be aware of.

Employers who hire foreign nationals without permission, or assign them to work outside the tasks permitted under their Work Permit, are considered in violation of Thai law.

1. Criminal Penalties & Significant Fines

The law imposes clear and severe penalties for illegal employment:

• Hiring a foreigner without a Work Permit: Fine ranging from THB 10,000 to THB 100,000 per foreign worker.
• Repeat offenses within two years may result in up to 1 year imprisonment, or a fine between THB 50,000–200,000, or both.
• Assigning work outside permitted scope: For example, placing a foreign worker in a position or location not authorized by the Work Permit. Fine: THB 10,000–100,000 per worker.

2. Additional Risks & Long-Term Business Impact

Beyond direct penalties, employers may face:

• Suspension from hiring foreign workers for repeated non-compliance
• Legal and administrative expenses during proceedings
• Damage to company reputation, affecting partnerships and client trust

The law also penalizes foreign nationals who work without a proper Work Permit or work outside their authorized scope.

1. Criminal Penalties

• Working without a Work Permit: Fine of THB 5,000–50,000, followed by immediate deportation.
• Working beyond permitted duties: Fine up to THB 50,000.

2. Deportation & Re-Entry Ban

The most severe consequence is deportation and a temporary or long-term ban on re-entering Thailand, which can severely impact the individual’s livelihood and future employment opportunities.

To stay compliant and avoid severe penalties, employers should follow these best practices:

• Verify documents thoroughly: Ensure the foreign worker has a valid passport and Work Permit before employment.
• Use legal recruitment channels: Recruit through licensed labor agencies authorized by the Ministry of Labor.
• Monitor Work Permit expiration: Employers are responsible for renewing employees’ Work Permits before they expire.
• Ensure job alignment: Foreign workers must perform only the duties and at the location specified in their Work Permit. Any change of role or workplace requires an official amendment.

Complying with Thai labor laws is not only about avoiding penalties—it demonstrates responsibility toward workers and supports a fair and safe working environment.