Poland's ZUS finds irregularities in 90.1% of corporate audits across eight months

Targeted auditing strategy

Between January and August 2026, inspectors from the Polish Social Insurance Institution (ZUS) conducted 20,529 workplace audits across Poland to verify employer compliance with statutory obligations. Irregularities were identified in 18,495 of those inspections, representing an effective detection rate of 90.1%. Social security officials attribute this high proportion of detected violations to advanced internal data analytics and risk-scoring models rather than random screening. By analyzing records already stored within administrative databases, ZUS identifies specific entities where the probability of legal non-compliance is highest before dispatching inspection teams. This targeted method reduces routine inspections for compliant businesses while focusing state oversight on firms exhibiting anomalous payroll patterns.

Financial scale and common documentation errors

Of the 20,529 audits completed during the eight-month period, 15,697 uncovered irregularities that resulted in direct financial consequences. The total financial value determined across all inspections reached 373.3 million PLN. The largest portion of this recovery, totaling 369.6 million PLN, involved the incorrect calculation and underpayment of mandatory social security contributions. An additional 12.7 million PLN stemmed from errors in calculating and settling social insurance cash benefits. A substantial portion of the non-financial and minor financial findings arose from routine procedural mistakes, such as overdue employee registrations, arithmetic errors, and inaccurate employment records. ZUS clarified that businesses can rectify most of these formal deficiencies quickly by submitting corrected documentation and paying outstanding balances to the Social Insurance Fund.

High-risk industries and employment schemes

The inspection data showed specific sectors where compliance risks were concentrated, particularly industries reliant on flexible civil law contracts and high staff turnover. International road transport, temporary employment agencies, job placement services, and security guard providers exhibited the highest frequency of irregularities. Regulators also directed intensive scrutiny toward the platform economy, where complex multi-party employment structures are frequently utilized. Common structural violations included the manipulation of multiple insurance titles to avoid mandatory levies, the deliberate underreporting of contribution assessment bases, and improper compensation structures for individuals performing work for their primary employer through intermediary contracts. ZUS noted that correct registration and payment directly determine worker benefit amounts during illness, disability, and retirement.

Long-term shift from volume to precision

The 2026 results represent a structural transformation in how Polish social security authorities conduct compliance operations compared to previous decades. In 2017, ZUS carried out more than 60,800 company inspections nationwide, followed by nearly 59,000 audits in 2018. During 2017, inspectors found irregularities in 65% of audited businesses, generating an average financial outcome of roughly 6,000 PLN per case. By 2026, while total audit volume across eight months dropped to 20,529, the detection rate exceeded 90% and the average financial yield surpassed 18,000 PLN per audit. This shift demonstrates that algorithm-assisted risk selection allows the institution to conduct fewer total inspections while achieving three times the financial result per audit recorded nine years earlier.