You are using an outdated browser and your browsing experience will not be optimal. Please update to the latest version of Microsoft Edge, Google Chrome or Mozilla Firefox. Install Microsoft Edge

December 3, 2019

Unfair Labor Practices: What Employers Need to Be Aware Of

Bangkok Post: Human Resources Watch

While most employers understand what “unfair termination” means, many may be unfamiliar with the term “unfair labor practice” and what it entails. The Labor Relations Act (LRA) gives three general categories of conduct considered to be unfair labor practices: retaliation, wrongful pressure, and termination while under collective bargaining agreements.

Retaliation

Actions deemed retaliation are prohibited. These include the following scenarios:

  • Termination or doing anything that results in employees, employee representatives, or committee members of labor unions or labor federations being no longer able to work with the employer while the labor union or employees take steps to prepare petitions, submit labor demands, or sue or give evidence to officers under labor protection laws.
  • Termination or doing anything that results in the employee no longer able to work with the employer because of labor union membership.
  • Hindering employees from holding labor union membership or asking employees to resign from union membership.
  • Giving (or promising) money or property to employees either to not apply or to resign from union membership; also prohibited are such gifts or promises to a labor union officer to not accept employee membership applications.
  • Hindering a labor union or labor federation from conducting activities, or hindering employees from exercising their rights as union members.
  • Interfering in a labor union’s or labour federation’s activities without legal authority.

Wrongful pressure

An example of wrongful pressure would be an employer directly or indirectly forcing an employee to be a union member or resign from union membership. The concept of wrongful pressure can also be connected to issues of retaliation—that is, doing anything that leads to the employer committing one of the actions detailed in the previous section.

Termination under collective bargaining agreements

While a collective bargaining agreement (CBA) between employees or a labor union and employers is in effect, the employer is prohibited from terminating anyone who is involved with labor demands. This includes employees, labor union committee and subcommittee members, employee representatives, and committee and subcommittee members of labor federations. However, exceptions to this rule exist if an employee commits one of the following offenses:

  • Performs duties dishonestly or intentionally commits a criminal offense against the employer.
  • Intentionally causes serious damage against the employer.
  • Through negligence causes serious damage against the employer.
  • Violates work rules or regulations, or disobeys orders that are legal and fair, despite having already been given a written warning by the employer (though the written warning requirement is waived for serious matters).
  • Abandons his or her duties for a period of three consecutive work days without reasonable cause.
  • Acts in any manner that supports or induces violation of a CBA or an order of a labour dispute arbitrator.

If an employer has need to terminate an employee for reasons other than the grounds listed above, the employer can terminate the employee even while the CBA is in effect. For example, if an employer suffers losses and cannot operate the business of a particular department, the termination is not an unfair labour practice (in fact, this very issue came up in a case before the Supreme Court in 2005). Another example—which again has been at issue in a case before the Supreme Court—would be the termination of an employee who has health problems and takes too many sick days in a year. In this situation, terminating the employee while the CBA is in effect is also not considered an unfair labor practice.

Procedural requirements

If anyone commits an unfair labor practice, the aggrieved person can submit a complaint to the Labor Relations Committee (LRC) within 60 days from the date of the violation. The LRC then needs to consider the complaint and issue an order within 90 days of receiving it. This step is crucial – if a person submits a petition to the labor court accusing another party of committing an unfair labor practice without having first proceeded with the LRC, the court must dismiss the petition.

The LRC will investigate the facts and evidence from both parties and will then issue an order – either dismissing the complaint (if the court believes the accusation is not true) or ordering the employer to take action to rectify or make amends for the unfair labor practice. This often takes the form of forcing an employer to reinstate a terminated employee or compensate the employee or concerned persons.

If a violator does not comply with an LRC order within a deadline stated by LRC, the violator will face criminal penalties such as imprisonment for up to six months, a fine of up to THB 10,000, or both.

In addition, if the LRC finds that an employer committed an unfair labor practice, and also orders the employer to reinstate the employee, the employer can petition the labor court to revoke the LRC’s order. However, if the court considers that the employer committed an unfair labor practice and the employee can no longer work with the employer, the court may order the employer to pay compensation to the employee instead of reinstatement.

 

This article was originally published in the Bangkok Post and is reproduced here with permission and thanks. The original story can be viewed on the Bangkok Post website.

RELATED INSIGHTS​ 

September 9, 2026
On August 25, 2026, Thailand’s cabinet approved in principle a draft amendment that would extend mandatory social security coverage to three categories of workers currently excluded from Thailand’s compulsory social security system. The amendment, proposed by the Ministry of Labour, would modify the Royal Decree Prescribing Businesses and Employees Excluded from the Social Security Act B.E. 2560 (2017). Newly Covered Workers The cabinet-approved proposal would remove the exclusions for the following three categories of employees, bringing them within Thailand’s mandatory social security system: Workers in seasonal cultivation (pho pluk), forestry (pa mai), and livestock (liang sat) businesses that do not employ workers year-round and whose operations do not include other types of business activities. Notably, fishery (pramong) workers were excluded from this amendment following objections raised at a Social Security Board meeting on April 30, 2025, because employers and employees in the fishery sector can already agree to opt into social security coverage under fishery labor laws. Domestic workers and other employees of individual employers where the work performed is not part of a business operation (e.g., housekeepers, gardeners, drivers). This group has actively demanded inclusion in the social security system. Workers employed in street-stall businesses operating fixed street stalls (kan kha phaeng loi). The rationale for including street-stall workers is that their employers have fixed, identifiable places of business that can be inspected. Accordingly, workers engaged in itinerant street hawking (kan kha re) remain excluded. The expanded coverage would apply to both Thai and foreign employees who possess valid identity documents and work permits, including migrant workers who have been granted special permission to work in Thailand. The Social Security Act B.E. 2533 (1990) does not restrict social security registration based on nationality, allowing these workers to register as insured persons under section 33. Employer Obligations and Employee
September 4, 2026
Thailand’s cabinet has approved two draft amendments aimed at improving labor-related judicial proceedings. The proposed amendments to the Act on the Establishment of Labor Courts and Labor Case Procedure B.E. 2522 (1979) and the Act on Procedures for Human Trafficking Cases B.E. 2559 (2016) are intended to make the process more efficient, appropriate, and fair. Key elements of these proposed amendments are outlined below. Expansion of Labor Court Jurisdiction Under the current framework, labor courts generally hear labor disputes, while criminal offenses under labor laws are handled separately. Matters involving both labor and criminal issues may therefore require the parties to pursue proceedings before different courts. To address this, the proposed amendments would expand the jurisdiction of labor courts to cover certain criminal offenses under labor laws. The government states that the change is intended to allow related issues to be heard by judges with expertise in labor law and to reduce the need for parallel proceedings. The proposed amendments also set out the following rules for cases involving multiple offenses. Where a single act gives rise to multiple offenses and at least one of those offenses falls within the jurisdiction of the labor court, the labor court may hear the related offenses as part of the same case. Where multiple connected acts give rise to different offenses, the labor court may hear the matters together or transfer part of the case to the appropriate court, taking into account convenience and the interests of justice. Criminal Offenses Covered The proposed amendments would extend labor court jurisdiction to criminal offenses under 11 labor-related laws, including laws concerning: Home workers protection Labor protection Labor protection in fisheries work Employment and job-seeker protection Management of foreign workers Social security Occupational safety, health, and working environment Compensation Maritime labor State enterprise labor relations
August 31, 2026
Thailand has introduced a new regulatory framework that may expose foreign nationals who violate the Foreign Business Act (FBA) to deportation. The Regulation of the Office of the Prime Minister on Deportation B.E. 2569 was published in the Government Gazette on August 27, 2026. The regulation establishes an administrative process for referring foreign nationals for deportation where this is deemed necessary in the interests of public order or public morality. It does not create new substantive deportation powers, but it expressly identifies unlawful business conduct under the FBA—including nominee arrangements—as grounds for referral. Grounds for Deportation Referral The regulation sets out five grounds that may give rise to a referral to the relevant authorities: Unlawful entry into, or unlawful stay in, Thailand in violation of immigration laws. Unlawful employment or engagement in work in violation of laws governing the employment of foreign nationals. Carrying on business in violation of the FBA, including through the use of nominee arrangements. Forging official documents or using forged official documents. Committing an offense punishable by imprisonment of five years or more. The framework takes a broad approach, extending not only to the perpetrators of these acts but also to those who facilitate, instigate, or otherwise support such acts. Deportation Risk Following a Criminal Judgment Where a foreign national has committed any of the above offenses and has fully served the sentence imposed pursuant to a final judgment, the interior minister has the power to order deportation. This power also applies where a court has issued a final judgment sentencing a foreign national to imprisonment but has suspended the execution of the sentence, or has imposed a fine. A deportation order may also specify a period during which the foreign national is prohibited from reentering Thailand. FBA Noncompliance: Broader Consequences Noncompliance with the FBA—including
August 20, 2026
As part of its membership in Lex Mundi, Tilleke & Gibbins has released the latest edition of its Guide to Doing Business in Thailand, providing an overview of the legal, regulatory, and commercial considerations for companies establishing or expanding operations in Thailand. The 2026 edition offers practical insight into the country’s business environment, investment framework, and operational requirements. The guide covers a wide range of topics relevant to foreign and domestic investors, including: Investment incentives and promotion schemes Financial facilities and banking regulations Exchange controls and money transfers Import and export regulations Business structures and incorporation options Requirements for establishing a business Operational and compliance considerations Business cessation and insolvency procedures Employment and labor laws Taxation Immigration and visa requirements Prepared by Tilleke & Gibbins lawyers across multiple practice areas, the publication outlines key aspects of doing business in Thailand, including foreign investment restrictions, regulatory compliance obligations, corporate structures, employment requirements, and recent legal and economic developments affecting investors. The publication forms part of Lex Mundi’s Country Guides series, a global collection of jurisdiction-specific reference materials prepared by member firms around the world. Together, these guides help companies evaluate opportunities, compare regulatory environments, and plan international business activities across multiple markets. The full Guide to Doing Business in Thailand 2026 is available through the button below.