🇹🇷 The KURGAN Algorithm: How the State Shifted to Predictive Business Auditing
The Turkish Tax Inspection Board (VDK) has officially shifted its paradigm. On-site inspections are no longer required to identify violations. Algorithms do this in real time—even before an inspector opens a case file.
📩 İzaha Davet: Statistics Worth Knowing
The state has prioritized pre-audit settlements via the izaha davet procedure—an invitation to provide explanations prior to the initiation of a full-scale audit.The figures for 2026 speak for themselves:
- Out of 19,374 resolved cases regarding baseline discrepancies, 77% of companies successfully substantiated their transactions or voluntarily paid additional tax. Only 23% were referred for a rigorous audit.
- Regarding suspicions of fictitious invoice usage, nearly 11,000 companies voluntarily increased their tax base by a total of 3.65 billion TL.
⚠️ Receiving an izaha davet letter is not a conviction. It is a window of opportunity. Competent defense at this stage prevents a full tax audit in 8 out of 10 cases.
👁️ The KURGAN System: Hunting Down Fictitious Supply Chains
The VDK has deployed the KURGAN (Kuruluş Gözetimli Analiz Sistemi) system—an early-warning platform that analyzes billions of transactions and identifies anomalies as early as the registration stage of new legal entities.KURGAN is integrated with the Tax Intelligence System (VİS). The algorithm automatically detects patterns typical of shell companies, maps affiliations, and routes red flags to specialized departments.
If your counterparty falls into a KURGAN risk category, suspicion automatically falls on your company as well.
⚠️ Shock Effect: 85 Billion Liras in Voluntary Additional Payments
The most striking outcome of 2026 is psychological.Relying on KURGAN data, the VDK dispatched warning letters to:
- 📬 83,272 taxpayers
- 📬 81,022 financial advisors (Mali Müşavir)
The result: companies voluntarily submitted amended tax returns and removed invoices totaling over 85 billion TL from their deductible expenses—without waiting for penalty assessments.
The corporate sector recognized that algorithms monitor every transaction.
🛑 Scrutiny Over VAT Refunds
Exporters seeking VAT refunds have also been subjected to stringent screening.Out of 30.9 billion TL requested, 26 billion TL was approved—4 billion TL was rejected during desk audits.
A rejection rate of ~13% indicates zero tolerance for technical defects in suppliers' documentation.
💡 Three Steps to Protect Your Business
- Counterparty KYC
Vet suppliers prior to signing contracts. If a counterparty is flagged in KURGAN's risk zone, your business is automatically exposed to risk as well. - Proactive Tax Health Check
Do not wait for a letter from the VDK. A regular independent audit simulating tax authority algorithms will uncover vulnerabilities before the system detects them. - Professional Representation for İzaha Davet
All communications with the VDK must be handled exclusively by qualified tax specialists. Any careless statement unsupported by documentary evidence leads directly to a full-scale audit.
For foreign businesses in Türkiye, the risks are significantly magnified due to the language barrier and lack of familiarity with local regulatory nuances. We conduct Tax Health Checks and manage interactions with the VDK to ensure you are prepared for any scenario.