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OpenAfterHours
UK Credit Risk RWA Calculator
$ OPEN SOURCE · BUILT AFTER HOURS

Risk-Weighted Assets,
computed at the speed of polars.

A high-performance Python engine for CRR (Basel 3.0) and Basel 3.1 (PRA PS1/26) — Standardised, F-IRB and A-IRB approaches. Millions of exposures in seconds, audited across ~5,300 tests.

$ uv add rwa-calc
50–100×
Faster than reference impl.
~5,300
Regulatory test cases
2 frameworks
CRR · Basel 3.1
Active dev
Pre-1.0 · not production-ready
OpenAfterHours · Open source regulatory tools