Risk-Based Capital and the NAIC Regime

In the U.S., insurance is regulated state by state rather than under one federal solvency regime like Solvency II in Europe, but all states use a common framework built by the National Association of Insurance Commissioners: risk-based capital, or RBC. Rather than requiring every insurer to hold the same flat amount of capital, the RBC formula computes a company-specific capital requirement by weighting the insurer's actual exposures, its assets, underwriting risk, credit risk, and (for life insurers) interest-rate risk, each by a factor reflecting how risky that category tends to be, and summing them (with an adjustment for diversification across categories) into an "Authorized Control Level" capital figure.

An insurer's actual capital is then compared to that requirement as a ratio, and different ratio thresholds trigger different levels of regulatory response: a "Company Action Level" ratio requires the insurer to submit a remediation plan, a lower "Regulatory Action Level" empowers the regulator to mandate specific corrective actions, and the lowest bands can trigger regulatory takeover of the company. The system is designed to catch capital deterioration early, well before an insurer would actually become unable to pay claims, giving regulators time to intervene before policyholders are at risk.