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INSURANCE REGULATION · T457 cat-30

NAIC Risk-Based Capital (RBC) Ratio Calculator

Calculate a simplified NAIC Risk-Based Capital (RBC) ratio for a US property/casualty insurer using the standard formula components (R0–R5). The result is displayed against all four NAIC action level thresholds with plain-English regulatory interpretation. Simplified standard formula: indicative only.

🔒Zero PII
📡No server calls
💻Client-side
📋NAIC RBC Framework
NAIC RBC Standard Formula P&C Insurer ACL RBC Action Levels Model Act #312
🔒 All inputs are processed locally in your browser. No data is transmitted. Do not enter real personal data — use synthetic or anonymised inputs only.
Background: NAIC RBC Framework

The NAIC RBC framework requires every US insurer to hold capital commensurate with its risk profile. The RBC ratio = Total Adjusted Capital ÷ Authorized Control Level RBC. Four action levels trigger regulatory intervention:

  • Company Action Level (CAL): RBC < 200%: insurer must file a remediation plan.
  • Regulatory Action Level (RAL): RBC < 150%: regulator may examine and issue orders.
  • Authorized Control Level (ACL): RBC < 100%: regulator may take control.
  • Mandatory Control Level (MCL): RBC < 70%: regulator must take control.
A: Total Adjusted Capital
From statutory balance sheet
Surplus notes etc.
Permitted practices, AVR, IMR (may be negative)
B: RBC Charge Components (Simplified Formula)
Asset Risk
Asset risk: affiliates · 10% charge rate default
Asset risk: fixed income · weighted avg charge rate
Default 2.0%: set to your portfolio quality blend
Asset risk: equity · 15% charge rate default
Asset risk: credit · 5–10% charge rate
Default 7.5% (mid of 5–10% range)
Underwriting Risk: by Line
Composite: reserve 10.5% · premium 16.5%
Underwriting risk: reserves · by-line charge factor
Underwriting risk: premium · by-line charge factor
1: RBC Ratio
RBC Ratio (Total Adjusted Capital ÷ ACL RBC)
-
0%70%100%150%200%300%+
3: Action Level Status
2: Component Breakdown (R0–R5)
Key Capital Metrics
4: Capital Buffer to Target Ratios
5: Premium Sensitivity

Model the impact of a change in net written premium (R5) on the RBC ratio. R5 charge scales with premium; all other components held constant.

−30% +30%
Premium change: 0% → RBC ratio: - · ACL RBC: -
6: Interpretation & Caveats
About This Tool
Disclaimer This tool implements the simplified standard formula: indicative only. The actual NAIC RBC filing uses detailed factor tables by asset quality, duration, and line-of-business sub-category. Covariance adjustment per NAIC P&C RBC instructions; life and health RBC formulas differ materially. Not a substitute for professional actuarial and finance review or regulatory submission.
NAIC RBC Instruction Manual (2024) Defines the R0–R5 charge components, covariance square-root aggregation, and Authorized Control Level RBC derivation for property/casualty insurers. NAIC RBC Instr. Manual 2024
Risk-Based Capital For Insurers Model Act (#312) Establishes the four action level thresholds (CAL 200%, RAL 150%, ACL 100%, MCL 70%) and the regulatory powers triggered at each. NAIC Model Act #312
NAIC Risk-Based Capital (E) Working Group Maintains and updates RBC formula components and charge factors used by the property/casualty RBC blank. NAIC RBC (E) WG
Charge Factors by Line
RESERVE (R4) / PREMIUM (R5)
Personal Auto8.5% / 15.0%
Homeowners8.0% / 17.0%
Workers' Comp12.0% / 13.0%
Commercial Auto9.0% / 16.0%
Commercial GL14.0% / 19.0%
Medical Malpractice22.0% / 29.0%
All Lines Composite10.5% / 16.5%
ASSET RISK DEFAULTS
R0 affiliates10%
R2 equity15%
R3 credit5–10%
Source Notes
  1. RBC formula components and charge factors sourced from NAIC Risk-Based Capital (E) Working Group publications and the NAIC RBC Instruction Manual (2024). Implemented as the simplified standard formula: indicative.
  2. This tool implements the simplified standard formula. The actual NAIC RBC filing uses detailed factor tables by asset quality, duration, and line-of-business sub-category. Professional actuarial and finance review required.
  3. Covariance adjustment formula per NAIC P&C RBC instructions; life and health RBC formulas differ materially.
  4. Action level thresholds (CAL 200%, RAL 150%, ACL 100%, MCL 70%) from the NAIC Risk-Based Capital For Insurers Model Act (#312).