Under 6 RCNY §5-300, impact ratio is the selection rate for a category divided by the selection rate of the most selected category, or the scoring rate for a category divided by the scoring rate of the highest scoring category. The rule does not convert that ratio into a simple LL144 pass/fail verdict.
The two formulas
| Output | Formula | Comparator |
|---|---|---|
| Selection/classification | category selection rate ÷ highest selection rate | Most selected category |
| Score | category scoring rate ÷ highest scoring rate | Highest scoring category |
What the ratio does not prove
An impact ratio is one required audit output. It does not by itself establish discrimination, validate the AEDT, or produce a statutory compliance verdict. Other employment-discrimination frameworks may be relevant, but they should not be misrepresented as the text of LL144.
Use the educational calculator
Open the LL144 impact-ratio calculator to see the arithmetic without a pass/fail label.
Frequently asked questions
No. LL144 requires the prescribed rates and ratios; it does not establish a universal pass/fail threshold based solely on one impact-ratio value.
The comparator is determined within the relevant calculation set: the most selected or highest scoring category for that analysis.
An independent auditor may exclude a category representing less than 2% of the data from specified impact-ratio calculations, but the rule requires justification and reporting when that option is used.
Next step
Use this page for general information only. For a specific workflow, review the LL144 scope framework or request an independent bias-audit scope review. Do not send candidate-level data through ordinary email.