What it means
A firm pays an engineer $180,000 while the midpoint of the appropriate annual salary range is $200,000, so the compa-ratio is 90%. That says where pay sits relative to the chosen reference, not whether the salary should be raised by 10%.
ADP describes compa-ratio as annual base salary divided by a median or reference salary and notes that benefits and variable pay are usually outside the measure, and the University of Wisconsin compensation glossary is another reference for salary-range terminology. Companies should specify whether they use an internal range midpoint or a market median, and they should choose the correct role, because a job title can cover different seniority, responsibilities and locations.
Set the pay basis by using annualised base salary against an annual reference rather than dividing monthly pay by an annual midpoint. A commission-heavy employee may have modest base pay but substantial variable earnings, so report base compa-ratio without claiming it measures total rewards, and compare a part-time salary with a part-time midpoint or convert both consistently to full-time equivalent.
Use current ranges and know the midpoint's purpose. A stale midpoint can make a competitive salary look high or a low salary look normal, so record the range's effective date, and read the employer's pay policy because some companies place a seasoned, fully proficient worker near the midpoint while others set ranges differently.
Range midpoints may also lag fast-changing occupations, so test the survey date and sample quality before relying on a benchmark, and convert currencies at a consistent rate with local market pay practices in mind. Interpret results cautiously in both directions.
Below 100%, new hires, developing skills or geographic policy may explain the gap, but none automatically justifies it, and above 100%, specialised skills, tenure or an outdated range may explain it without alone meaning overpayment. An employee may also be below the range minimum even if the compa-ratio looks close to 100% for a broad band, so review position-in-range separately.
Review peers and look for inequity with care. Compare employees doing comparable work with appropriate controls for grade, location and experience, since averages can hide individual outliers, and remember that differences associated with protected characteristics need careful review under applicable law.
The ratio can prompt analysis but cannot diagnose discrimination by itself, and performance data should not be assumed unbiased or comparable. Avoid a universal target and mind the arithmetic of change.
A 100% ratio is not a legal requirement or a guaranteed fair salary, and to move $180,000 to a $200,000 midpoint requires a $20,000 increase, or about 11.1% of current pay, not 10%, because ratios and raise percentages have different denominators. A promotion brings a new midpoint, so the ratio may fall even if pay rises, and the average of individual ratios differs from total pay divided by total midpoints when salaries vary, so state the method and document decisions, because a spreadsheet value should not decide pay alone.
In practice
Real-world examples.
Example
A new hire has 85% compa-ratio against the documented range midpoint. On a $100,000 midpoint, she is paid $85,000, and HR records that this reflects her developing skills and a plan to review pay after a year.
Example
An experienced specialist sits at 115%, prompting a review of the range and role. His $115,000 salary compares with a $100,000 midpoint, and the review finds that the range has not been updated for two years while market pay moved up.
Example
A promotion raises pay but lowers the ratio because the new grade midpoint is higher. The manager explains to the employee that the lower ratio reflects a higher reference point and is not a pay cut.
Formula
Calculation
Compa-ratio = annualised base salary / defined salary midpoint x 100. At $180,000 against $200,000, the result is 90%. To reach the midpoint requires $20,000 more, an 11.1% raise on current salary.
A promotion shows how the ratio can fall while pay rises. If the engineer is promoted and paid $195,000 against a new grade midpoint of $230,000, the compa-ratio is $195,000 / $230,000 x 100, which is about 84.8%, lower than before despite a $15,000 pay increase.Case study
Seen in the real world.
Entirely fictional case: Orbit Tech found low average ratios among engineers but also discovered its salary ranges had not been updated. HR checked current benchmarks, job levels and individual circumstances before proposing changes. The case does not claim turnover automatically falls when a ratio reaches 100%.
Watch out
Common mistakes.
- Comparing a part-time salary with a full-time annual midpoint.
- Treating 100% as a universal fair-pay target.
- Using old ranges or titles without checking actual role and location.
Questions
People also ask.
What is compa-ratio?
A ratio of defined pay to a role's salary midpoint or stated market reference.
What does 1.0 mean?
The employee's defined pay equals the reference, not necessarily that pay is fair or optimal.
How is it used?
To flag pay positions for review alongside role, market, performance, equity and budget context.
From the founder's library
Take it further with the book.
Build your financial confidence beyond this definition. Shihan's full-length guide, Accounting Fundamentals, takes the same plain-English approach and turns it into a complete, practical playbook for non-finance managers, business owners and students - with chapter-end quiz answers and presentation slides included.
25% off with code MMHQ25, applied at checkout. Priced in USD - checkout may show the equivalent in your local currency.
View the book and save 25%