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Salary Benchmarking Calculator

Calculate salary percentile and compa-ratio from market data.

About this calculator

The Salary Benchmarking Calculator compares one employee's Current Salary against market compensation data pulled from a survey or comp database, expressed as a Market 25th, 50th (median), 75th, and 90th percentile for the same role. Compa-Ratio is the headline output — Current Salary divided by the Market 50th Percentile, expressed as a percentage — and is the standard HR metric for whether someone is paid at, above, or below the going market rate for their role: 100% means the employee earns exactly the market median, while a figure meaningfully below 100% flags a pay gap worth reviewing. Estimated Percentile locates Current Salary within the full P25–P90 spread using linear interpolation between whichever two percentile points it falls between, giving a more granular read than compa-ratio alone (someone at 100% compa-ratio is by definition close to the 50th percentile, but two employees both "at median" can still sit at meaningfully different points once P25 and P75 spread is accounted for).

Gap to Median and Gap to 75th Percentile translate the comparison into dollar terms — the raise, in today's dollars, that would close each gap. COL-Adjusted Salary rescales Current Salary by the Cost of Living Index (100 = national average) so a salary earned in a high-cost metro isn't unfairly flagged as underpaid purely because the sticker number looks smaller than a national benchmark. Market Range Spread reports how wide the P25–P75 band is relative to P25, a rough signal of how much legitimate pay variation the market itself tolerates for the role.

Inputs

$
$
$
$
$

Results

Compa-Ratio

102.6%

Estimated Percentile53
COL-Adjusted Salary$80,000.00
Gap to Median-$2,000.00
Gap to 75th Percentile$15,000.00
Market Range Spread46.2%
How to Use This Calculator
  1. Enter the employee's current annual salary.
  2. Input the market percentile data (P25, P50, P75, P90) for a comparable role from a compensation survey.
  3. Set the Cost of Living Index for the employee's location (100 = national average) to see the COL-Adjusted Salary.
  4. Review the compa-ratio — your salary as a percentage of the market median.
  5. A compa-ratio below 90% indicates the employee may be underpaid relative to market.
  6. Use the results to prioritize merit increases or adjustments during compensation review cycles.

How the result changes with Market 50th Percentile (Median)

Market 50th Percentile (Median)Compa-Ratio
$39,000.00205.1%
$58,500.00136.8%
$117,000.0068.4%
$195,000.0041%

What each input means

Current Salary
Employee's current annual salary.
Market 25th Percentile
25th percentile salary for comparable role.
Market 50th Percentile (Median)
Median market salary for comparable role.
Market 75th Percentile
75th percentile salary for comparable role.
Market 90th Percentile
90th percentile salary for comparable role.
Cost of Living Index
Local cost of living index (100 = national average).

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    6 parameters
    Current Salary = 80000, Market 25th Percentile = 65000, Market 50th Percentile (Median) = 78000, Market 75th Percentile = 95000, Market 90th Percentile = 115000, Cost of Living Index = 100 = 6 input(s) provided
  2. Calculate Compa-Ratio
    Compa-Ratio
    102.6 = 102.6
  3. Calculate Estimated Percentile
    Estimated Percentile
    53 = 53
  4. Calculate COL-Adjusted Salary
    COL-Adjusted Salary
    80000 = $80,000

Engine last updated . Checked against 2 independently-derived tests — how we verify calculators. Built by Paul Gunder, a software engineer, not a licensed financial, medical, or legal professional.

Frequently Asked Questions

What counts as a good compa-ratio?

Most compensation programs treat 90%–110% as a normal, on-target range, with 100% meaning the employee is paid exactly at the market median for the role. A compa-ratio below 90% is commonly used as a threshold for reviewing potential pay-equity or retention risk, while a ratio well above 110% suggests the employee is being paid well above typical market rates for their level.

Why does the calculator show both a compa-ratio and an estimated percentile?

Compa-ratio only compares Current Salary to the single median (P50) figure, so two employees with the same compa-ratio can actually sit at different points in the real distribution if the market's P25–P75 spread is unusually wide or narrow. Estimated Percentile interpolates across all four percentile points you enter, giving a more precise read of where the salary actually falls within the market's range.

How should I use the Cost of Living Index input?

Set it to 100 if the salary and market data are already in the same local market, since that leaves COL-Adjusted Salary unchanged. If you're comparing a local salary against a national benchmark, enter the local cost-of-living index relative to the national average (over 100 for expensive metros, under 100 for lower-cost areas) so the comparison isn't distorted by regional cost differences alone.

What does a negative Gap to Median mean?

Gap to Median is Market 50th Percentile minus Current Salary, so a negative value means the employee's Current Salary already exceeds the market median — there is no gap to close, and the employee is paid above the midpoint of the comparable market range for the role.

Does a low compa-ratio always mean the employee is underpaid?

Not necessarily — compa-ratio only reflects the market data you enter, so it's only as accurate as the comparable-role percentiles used. A newer employee still progressing through a pay range, or a role benchmarked against the wrong comparable job, can show a low compa-ratio without being a genuine pay-equity problem, so it's best used as a starting point for review rather than a final verdict.

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