Differences in Solvency II Internal Model Asset Calibrations Still "Moderate to Significant"

Key Takeaways

• Eiopa study shows internal model asset calibrations still vary widely
• Variations can shift Solvency II capital requirements by several percentage points
• Regulators may tighten guidance to harmonize risk assumptions across Europe
• Insurers face higher compliance costs if models must be re‑calibrated

Pulse Analysis

Solvency II, the EU's risk‑based capital framework for insurers, allows firms to use internal models to reflect their specific risk profile rather than relying solely on standard formulas. While this flexibility promotes risk‑sensitive capital allocation, it also places the onus on insurers to calibrate market and credit risk parameters accurately. Disparities in these calibrations can lead to divergent capital charges, undermining the regime's goal of a level playing field across the continent.

Eiopa's latest study, based on a survey of more than 150 European insurers, confirms that calibration differences remain "moderate to significant." The report attributes the gaps to varying data sources, divergent assumptions about asset volatility, and inconsistent treatment of liquidity risk. In some cases, the resulting capital requirement variance exceeds several percentage points, a material shift for firms operating on thin margins. The study also highlights that newer entrants and smaller insurers tend to rely more heavily on external benchmarks, amplifying the inconsistency.

The findings signal a potential regulatory response. Eiopa is expected to issue more detailed guidance on data quality, stress‑testing scenarios, and parameter selection to curb the observed heterogeneity. For insurers, the message is clear: investing in robust model governance and periodic re‑calibration will become a cost of compliance. Aligning internal models not only reduces supervisory risk but also enhances comparability for investors and rating agencies, ultimately strengthening confidence in the European insurance market.