If your group operates in both the EU and Türkiye, your data protection officer faces a frustrating reality: KVKK and GDPR look like the same regulation but are operationalised differently. Most controls overlap; a handful diverge enough to create compliance gaps if you assume "GDPR-compliant equals KVKK-compliant." This cheat sheet maps the differences onto ERP system controls so your group privacy programme actually covers the Türkiye subsidiary.
The 5-minute summary
| Topic | KVKK (Türkiye) | GDPR (EU) |
|---|---|---|
| Legal basis | Law No. 6698 (2016) | Regulation 2016/679 (2018) |
| Regulator | KVKK Authority (Ankara) | National DPAs (DSB, CNIL, etc.) |
| Registration | VERBİS (mandatory above thresholds) | None — accountability principle |
| Cross-border transfer | Whitelist + adequacy + DPA | Adequacy decisions + SCCs + DPF |
| Breach notification | 72 hours to KVKK + data subject | 72 hours to DPA |
| DPO | Required for VERBİS-listed | Required for high-risk processing |
| Right to erasure | Article 7 ("destruction") | Article 17 ("erasure") |
| Maximum fine | Up to ₺13.4M per violation (2026) | Up to €20M or 4% global turnover |
| Children's data | No specific age | 16 (national variations) |
The principles (lawfulness, purpose limitation, data minimisation, accuracy, storage limitation, integrity, accountability) are functionally identical. The operational differences are where ERPs trip up.
VERBİS — the unique Türkiye obligation
There is no GDPR equivalent. VERBİS (Veri Sorumluları Sicili) is a public register where data controllers above certain thresholds must list:
- Categories of personal data processed
- Purposes
- Data subject groups
- Storage periods
- Recipients (including foreign recipients)
- Technical and administrative measures
If you process Turkish citizen data and have employees ≥50 OR annual financial balance ≥₺100 million, you must register. Foreign companies processing Turkish citizen data must register regardless of size. Your ERP should help you generate and maintain the inventory that feeds VERBİS — manually rebuilding it every year is painful.
ERP control: Module that maintains a per-table data inventory with category, retention period and lawful basis. Birasyo ships a KVKK inventory module with VERBİS-format export.
Cross-border data transfer
GDPR allows transfers to "adequate" countries (UK, Switzerland, Japan, etc.) and to the US under the EU-US Data Privacy Framework (DPF). KVKK is stricter:
- Whitelist of "adequate" countries published by KVKK Authority — currently very short (and the EU is on it as of 2024)
- For non-adequate countries, explicit consent OR a commitment letter approved by KVKK Board is required
- DPA-equivalent contracts alone are insufficient (unlike GDPR SCCs)
Practical impact: A US-headquartered group routing Türkiye payroll data to a US-based HRIS needs explicit consent from each employee or a KVKK-approved commitment letter. ERP shortcut: keep payroll in a region the KVKK Authority has whitelisted (EU) and replicate only aggregated, anonymised data to HQ.
ERP control: Configurable data residency. Microsoft Azure does not operate a Türkiye region; Birasyo defaults to Azure Europe (Netherlands/Ireland) which is on the KVKK whitelist and provides a private-deployment option with a Turkish hosting provider for customers needing in-country residency.
Audit trail expectations
GDPR demands "appropriate technical measures" but is technology-neutral. KVKK Authority guidance (especially after the Yapı Kredi and other major fines) has been increasingly specific:
- Immutable audit log showing who accessed personal data, when, from which IP
- Justification field for sensitive-data access (health, biometric, criminal)
- Quarterly access reviews with documented sign-off
ERP control: Every read/write of sensitive fields (national ID, IBAN, health data) logged with user, timestamp, IP, justification. Logs must be tamper-evident and retained for at least 5 years.
Right to erasure — important nuance
GDPR's "right to erasure" allows refusal where data is needed for legal claims, public interest or freedom of expression. KVKK is stricter on the timeline (within 30 days) but allows refusal where:
- Processing is required by law (tax records: 5 years; e-Ledger: 10 years)
- Public health or safety
- Statistics or research after anonymisation
Practical pattern: When a customer requests erasure, your ERP should anonymise (replace name/email/phone with hashes) while retaining transactional records the tax law mandates. Hard delete is rarely the right answer.
ERP control: Erasure workflow that anonymises configurable fields per role, leaving foreign-key relationships intact for accounting integrity.
The 5 things most ERPs get wrong
- Treating audit log as opt-in — should be on by default, not a paid add-on.
- No KVKK inventory module — leaving you to maintain a separate spreadsheet.
- No data subject request workflow — every request handled by email creates risk.
- No anonymisation patterns — only hard delete, which breaks accounting.
- No VERBİS export — you rebuild the registration form annually by hand.
Where Birasyo lands
- KVKK inventory module (auto-generated VERBİS-format export)
- Data subject request workflow (intake → triage → response within 30 days)
- Configurable anonymisation per data category
- Immutable audit log with 5-year minimum retention
- Data residency: Azure Europe default (KVKK whitelist), private deployment in Türkiye on request
- DPA template in EN + TR for both customer (KVKK) and EU partner (GDPR) signatures
Closing
KVKK and GDPR are 80% the same. The 20% that differs — VERBİS, cross-border whitelist, audit-log specificity, anonymisation expectations — is exactly where ERPs that "tick the GDPR box" fail Turkish inspections. Test your ERP against each of the controls above, not against marketing claims.
Want the same overview for your specific configuration? Book a compliance-focused demo — we'll walk through your group's data flow and flag the gaps.
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