Why PDPA matters in 2026
Thailand's Personal Data Protection Act (PDPA), B.E. 2562, became fully enforceable in June 2022, and the Personal Data Protection Committee (PDPC) has since issued more than 30 sub-regulations and 50+ enforcement decisions. As of early 2026, administrative fines have crossed THB 380 million, with the largest single fine being THB 7M against a healthcare provider for inadequate access controls.
The PDPA applies to every entity processing personal data of individuals in Thailand, regardless of where the entity is based. There is no SME exemption. There is no small-volume exemption. If you have a customer list, an HR system, or a website with a contact form, you are in scope.
This checklist captures everything we've learned advising 200+ Thai entities through PDPA implementation.
Disclaimer: General information only. Contact us for an audit fitted to your specific operations.
What this guide covers
- Quick PDPA overview
- The 10-step compliance checklist
- Mandatory vs. optional measures
- DPO appointment — when required and how
- Records of Processing Activities (RoPA)
- Privacy Notice requirements
- Data Subject Rights handling
- Data Processing Agreements (DPA)
- Cross-border transfer rules
- Breach notification procedure
- Cost estimates by company size
- Common audit findings (and fixes)
- Penalty structure
- The next 6 months — what's coming
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1. Quick PDPA overview
PDPA is structurally similar to GDPR but with three Thai-specific differences:
- Lawful basis is more permissive — Thailand allows a "legitimate interest" basis without the formal balancing test that GDPR demands.
- Sensitive data categories include religion, race, and criminal records, but also explicit categories not in GDPR like genetic and biometric data when processed for unique identification.
- Penalties are tiered — administrative (up to 5M THB), criminal (imprisonment up to 1 year), and civil (compensation + punitive damages).
If your organization is GDPR-compliant, you are 80% of the way to PDPA compliance. The remaining 20% is the gap most companies underestimate.
2. The 10-step compliance checklist
The path to PDPA compliance, in priority order:
Step 1: Data inventory (1-2 weeks)
Map every category of personal data you collect, where it's stored, who accesses it, why, and for how long. This is the foundation for every other step. Without this, you cannot satisfy RoPA, privacy notice, or data subject rights.
We recommend a spreadsheet with the following columns:
| Data category | Source | Storage | Access | Purpose | Lawful basis | Retention | Cross-border |
|---|
Step 2: Lawful basis analysis (1 week)
For each processing activity, determine which of the 6 lawful bases applies:
- Consent
- Contract performance
- Legal obligation
- Vital interest
- Public task
- Legitimate interest
Pitfall: many Thai HR systems incorrectly default to "consent" when "contract performance" or "legal obligation" is the correct basis. This matters because consent can be withdrawn — contract performance cannot.
Step 3: Privacy Notice update (1 week)
Required content per PDPC guidelines:
- Identity and contact of controller
- DPO contact (if appointed)
- Categories of data processed
- Purposes
- Lawful basis
- Recipients (including third parties)
- Cross-border transfers
- Retention period
- Data subject rights and how to exercise
- Right to lodge complaint with PDPC
Many Thai companies still publish GDPR-style notices that don't meet PDPC's 2024 specificity guidelines.
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11. Cost estimates by company size
| Company size | Typical PDPA implementation cost | Annual maintenance |
|---|---|---|
| Under 10 employees | 50-100K THB | 30-60K THB |
| 10-50 employees | 150-300K THB | 80-150K THB |
| 50-200 employees | 400-800K THB | 200-400K THB |
| 200-500 employees | 800K-1.5M THB | 400-800K THB |
| 500+ employees | 1.5-3M THB+ | 800K-1.5M THB |
Costs above include legal advisory, DPO appointment (outsourced or internal), policy drafting, training, and remediation of major findings. They exclude software/tooling costs.
Closing
PDPA is not a one-time project — it is an operating discipline. The companies that struggle are the ones that treat it as a documentation exercise. The ones that thrive treat it as a governance investment.
Need a PDPA audit? Call us at +66 92 254 2045 or email [email protected].
— Suwanvara Law Firm