CASPreliminaryACAS track
CAS MAS-II Pass Rates
Exam MAS-II: Modern Actuarial Statistics II
49.4%
Spring 2026 raw pass rate
−4.1 ptsvs 53.5% in Winter 2026
- All-time high
- 67.2%Spring 2021
- All-time low
- 27.5%Fall 2018
- Average
- 50.8%across 17 sittings
- Std. deviation
- 11.0 ptssitting to sitting
- Candidates tracked
- 7,7392018 to 2026
- Sittings
- 17all counted
Raw pass rate
Every MAS-II sitting
| Sitting | Candidates | Passed | Raw rate | Effective rate |
|---|---|---|---|---|
| Spring 2026 | 577 | 285 | 49.4% | 52.8% |
| Winter 2026 | 288 | 154 | 53.5% | 57.0% |
| Fall 2025 | 595 | 314 | 52.8% | 57.1% |
| Summer 2025 | 399 | 199 | 49.9% | 52.0% |
| Spring 2025 | 655 | 350 | 53.4% | 55.7% |
| Fall 2024 | 820 | 438 | 53.4% | 56.0% |
| Spring 2024 | 773 | 440 | 56.9% | 60.2% |
| Fall 2023 | 682 | 443 | 65.0% | 67.0% |
| Spring 2023 | 397 | 249 | 62.7% | 64.8% |
| Fall 2022 | 570 | 322 | 56.5% | 58.1% |
| Spring 2022 | 596 | 308 | 51.7% | 58.2% |
| Fall 2021 | 466 | 170 | 36.5% | 40.3% |
| Spring 2021 | 400 | 269 | 67.2% | 70.4% |
| Fall 2020 | 291 | 142 | 48.8% | 55.5% |
| Fall 2019 | 131 | 66 | 50.4% | 55.5% |
| Spring 2019 | 59 | 17 | 28.8% | 36.2% |
| Fall 2018 | 40 | 11 | 27.5% | 40.7% |
About MAS-II
MAS-II tests credibility, linear mixed models, Bayesian statistics, and statistical learning. Introduced in Fall 2018, it is the second of the two CAS-administered statistics prerequisites for the ACAS designation.
Data: Casualty Actuarial Society official exam statistics, 2018 to 2026. Last updated July 5, 2026.