How compa-ratio is calculated
The formula is simple:
Compa-ratio = salary ÷ band midpoint
The band midpoint is the rate you target for a fully competent person in the role. So a $90,000 salary in a band with a $100,000 midpoint has a compa-ratio of 0.90 — ten percent below midpoint. A $110,000 salary in the same band is 1.10, ten percent above. Because every salary is measured against its own role's midpoint, you can line up a coordinator and a director on the same comparable scale.
How to read it
As a common guideline (adjust to your own pay policy), compa-ratios tend to read like this:
- Below 0.90. Building toward full competence — typical for someone newer to the role or still developing in it. A salary under the band minimum is off-band and should be reviewed.
- 0.90 – 1.10. Around the midpoint — paid at, or close to, the market rate the band targets for a fully competent person. This is where most settled employees sit.
- Above 1.10. Experienced, consistently strong, or in a hard-to-hire role — nearing the top of the band, with limited room left for in-band raises. A salary above the band maximum is off-band and worth a look.
A low compa-ratio is not automatically a problem, and a high one is not automatically a reward to protect. It's a number that prompts a question, not a verdict.
Compa-ratio vs range penetration
Compa-ratio has a close cousin: range penetration, which measures how far up the band a salary sits, from the floor (0%) to the ceiling (100%). The two answer slightly different questions — compa-ratio against the midpoint, penetration across the whole range — and penetration is the cleaner placement measure when bands have different widths. Most compensation tools show both.
Compa-ratio and pay equity
Compa-ratio is also the right basis for a first-pass pay-equity check. Comparing the average compa-ratio of different groups — by gender, department, or tenure — is fairer than comparing raw salaries, because compa-ratio already controls for role level: a gap in average compa-ratio isn't simply picking up that one group holds more senior jobs. A wide gap is a prompt to look closer, not proof of unfair pay — a full analysis controls for documented factors and is best run with HR and legal advisors.
Common mistakes
- Reading compa-ratio without a band. The number only means something against a midpoint you actually set — a guessed midpoint gives a meaningless ratio.
- Treating off-band pay as automatically wrong. A new hire, a long-tenured employee, or a stale band all explain it; investigate before you conclude.
- Using one group's average as proof. Small groups hide a lot; spot-check individuals as well as group averages.
Related templates and concepts
Compa-ratio is measured against a pay band, so the two go together. To check one role for free, the Compa-Ratio Calculator is an ungated, no-signup tool; the Compensation Pay-Band & Pay-Equity Workbook computes it for your whole team and screens pay equity by group. See how a workbook compares with compensation management software, and the templates for HR & team leads hub for the rest of the toolset.
