Educational Information Only — Not Legal Advice

    This site provides educational information only and is not a substitute for professional legal advice. Consult a qualified Thai lawyer for personalized guidance. Laws may change. Full DisclaimerPrivacy Policy

    Skip to main content
    Last updated:
    Share:

    Educational Information Only

    The content on this page is for general educational purposes and does not constitute legal advice. Every legal situation is unique. For matters involving investigation, arrest, litigation, or formal proceedings, consult a qualified legal professional.

    Competition & Antitrust
    severe offence

    Hard-core Cartel / Bid-Rigging in Thailand

    Agreements between competitors to fix prices, restrict output, share markets, or rig bids are treated as the most serious ('hard-core') competition violations and carry criminal penalties.

    Last updated: February 2026
    Legal Sections

    Trade Competition Act B.E. 2560 (2017), Sections 54 and 72

    Maximum Penalty

    Criminal penalties including imprisonment and a fine calculated by reference to the turnover of the year in which the offence was committed

    Severity Level

    severe

    Definition

    Agreements between competitors to fix prices, restrict output, share markets, or rig bids are treated as the most serious ('hard-core') competition violations and carry criminal penalties. Under Thai law, this offence is classified as a severe offence within the category of Competition & Antitrust.

    Elements of the Offence

    For a conviction, the prosecution must prove all of the following elements beyond reasonable doubt:

    1

    An agreement or concerted practice between competitors (horizontal)

    2

    The purpose or effect is to fix prices, limit supply, allocate markets, or collude on bids

    Penalties

    Maximum Penalty

    Criminal penalties including imprisonment and a fine calculated by reference to the turnover of the year in which the offence was committed

    Actual sentences depend on factors including the severity of the conduct, harm caused, prior convictions, and mitigating circumstances. Courts have discretion to impose lesser sentences within the statutory range.

    Possible Defences

    The following defences may be available depending on the circumstances:

    No agreement or concerted practice existed (independent conduct)

    The arrangement falls within a permitted exemption or block exemption

    Note: The availability of defences depends on specific facts. Professional legal advice is essential.

    For Foreigners

    Special Considerations for Foreign Nationals

    Applies to any business operating in the Thai market, including foreign-owned companies and their local subsidiaries. Compliance programmes and careful handling of competitor contacts and tenders are essential.

    When Legal Representation Matters

    If you are accused of hard-core cartel / bid-rigging or facing investigation, immediate legal representation is essential to protect your rights and build an effective defence.

    Anglo Siam Legal provides experienced legal services across Thailand for both Thai nationals and foreigners.

    feedback.wasThisHelpful