Compa-ratio compares an employee's salary with the midpoint of the applicable salary range. The standard calculation is employee salary divided by range midpoint. A compa-ratio of 1.00 means the employee is paid exactly at midpoint. A value of 0.90 means salary is 90% of midpoint, while 1.10 means salary is 110% of midpoint. Compa-ratio is useful for identifying pay-position patterns, but it does not tell an employer whether a salary is fair or legally compliant. The reason for an employee's position still needs to be supported by objective and consistently applied pay-setting and progression criteria.
Jurisdiction: European Union
Compa-Ratio Compares Salary With the Range Midpoint
The term compa-ratio is short for comparative ratio. It expresses an employee's salary as a proportion of the midpoint of the salary range assigned to the job or grade. The midpoint is often used as a reference salary for a fully proficient employee or as a market-positioning point, depending on the employer's compensation philosophy. Compa-ratio therefore answers a narrower question than whether someone is fairly paid: how does this salary compare with the midpoint? Because ranges differ by job level and geography, the ratio allows compensation teams to compare relative position across groups without comparing raw salary amounts alone.
The Formula Is Salary Divided by Midpoint
The common formula is straightforward: employee salary divided by salary range midpoint. If an employee earns 54,000 and the midpoint is 60,000, the compa-ratio is 0.90. If salary equals 60,000, the ratio is 1.00. If salary is 66,000, the ratio is 1.10. Some organisations display the result as a decimal and others as a percentage, so 0.90 may also be shown as 90%. The calculation only makes sense if the employee is matched to the correct range and midpoint. A wrong grade, outdated range or incorrect geographic differential can produce a precise-looking number that is analytically misleading.
A Compa-Ratio Below 1.00 Is Not Automatically Underpayment
Employees can legitimately sit below midpoint for many reasons, depending on the employer's documented pay philosophy and the applicable legal framework. A worker may be relatively new to the role, still developing required proficiency or positioned according to another objective factor that the employer consistently uses. Likewise, a ratio above 1.00 is not automatically excessive. An employee may have substantial role-relevant experience, sustained proficiency or another defensible reason for placement above midpoint. The ratio becomes useful when the employer can connect the position to documented criteria rather than assuming that every employee should move toward exactly the same number on the same timetable.
Compa-Ratio and Range Penetration Measure Different Things
Compa-ratio uses one reference point: the midpoint. Range penetration uses the entire span from minimum to maximum. If an employer wants to know how close a salary is to the market or policy reference represented by midpoint, compa-ratio may be the clearer measure. If it wants to know how far an employee has moved through the complete salary range, range penetration may be more intuitive. Compensation teams often use both. The important control is to avoid treating them as interchangeable, because a 90% compa-ratio does not mean the employee has moved through 90% of the range.
Group Patterns Can Reveal Questions Worth Investigating
Compa-ratios become particularly useful when analysed across comparable workers. An employer can examine average or median ratios by sex, department, worker category, location, tenure band or other legitimate analytical groupings. If one group is persistently concentrated below midpoint while another comparable group is above it, the pattern deserves investigation. The explanation might involve hiring history, progression practices, market adjustments or other objective factors, but the employer should test rather than assume the cause. The ratio is therefore a screening tool that can help direct a pay-equity review toward particular jobs or processes.
The Directive Requires Objective Criteria Behind Pay Placement
Directive (EU) 2023/970 does not require employers to calculate compa-ratios. Article 4 requires pay structures that enable comparison of work value using objective and gender-neutral criteria, while Article 6 requires easily accessible criteria for determining pay, pay levels and pay progression and requires those criteria to be objective and gender neutral. A compa-ratio can help an employer test whether its structure is being applied consistently, but the ratio itself cannot justify a pay difference. The employer still needs evidence showing why a worker is positioned where they are and why the same criteria are applied consistently to comparable workers.
Use the Correct Midpoint Version for Historical Analysis
Like range penetration, compa-ratio depends on the salary structure in force at the time of analysis. If a midpoint increases during an annual structure review while employee salary remains unchanged, the employee's compa-ratio will fall even though nominal pay has not been reduced. Historical analysis should therefore retain the range effective date and the midpoint used for each calculation. Employers should also document whether a geographic differential or another approved structure adjustment applies. Keeping those details with the employee's grade and salary makes the calculation reproducible and reduces the risk of drawing conclusions from mismatched range data.
Frequently Asked Questions
What is a good compa-ratio?
There is no universal good value. The appropriate position depends on the employer's pay philosophy, the employee's objectively relevant circumstances and the rules used for progression within the range.
What does a compa-ratio of 1.00 mean?
It means the employee's salary is exactly equal to the midpoint of the applicable salary range.
Is compa-ratio required by the EU Pay Transparency Directive?
No. It is a compensation analytics metric. The Directive focuses on equal pay, objective gender-neutral pay structures and transparent pay-setting and progression criteria.
Related Guides
Official Sources
Requirements and practices differ by jurisdiction and organisation. Check current local law, official guidance and professional advice for a specific situation.