Salary insights

Salary on-site at Certain Advantage in the Hertfordshire region

Market pay levels based on 5 offers with salary.

Browse vacancies

Recalculated from open vacancies where the employer states pay.

Median105 159 £Half of offers pay more, half pay less
Average105 159 £Arithmetic mean of all offers
Lower quartile105 159 £25% of offers pay less
Upper quartile105 159 £25% of offers pay more

How pay is distributed

The band covers the middle half of the market (25th–75th percentile), the line marks the median.

Lower quartile105 159 £
Median105 159 £
Upper quartile105 159 £

What the numbers mean

  • Half of all offers fall between 105 159 £ and 105 159 £.
  • Every fourth offer pays more than 105 159 £.
  • The average is close to the median, so offers are spread evenly.
  • The sample is small (5 offers), so treat the numbers as a rough guide.

Compare your salary

Check in one step whether your pay is above or below the market for this selection.

Vacancies with salary

All matching vacancies
Certain Advantage Stevenage ·

Software Engineer ( C# / C++ )

126 750 – 126 750 £

World Class Defence Organisation is currently looking to recruit 5x C# / C++ Software Engineer subcontractors on an initial 12 month contract. Desktop C# is the expertise the department are…

ContractOn-siteStevenage

Frequently asked questions

Why show the median instead of the average?

The median (105 159 £) is the middle of the market: half of the offers pay more and half pay less. Unlike the average (105 159 £), it is not skewed by a handful of very high salaries.

What does the typical range mean?

From 105 159 £ to 105 159 £ is the middle half of all offers — the 25th to 75th percentile. A quarter of vacancies pay below 105 159 £ and a quarter above 105 159 £.

Where does the data come from?

From 5 open vacancies with a stated salary that Finder collects from public sources. Numbers are recalculated as the selection changes.

How do I tell whether I am paid fairly?

Compare your pay with the median and the quartiles: near 105 159 £ is the market level, above 105 159 £ is the strong quarter, below 105 159 £ is a reason to negotiate. Use the “Compare my salary” button on this page.

How we calculate salaries

Short methodology and the data behind these numbers.

  1. 1We collect offersOnly vacancies from open sources where the employer states pay are used.
  2. 2We normalise themA salary range is reduced to one comparable value per vacancy.
  3. 3We compute percentilesMedian, quartiles and the average are calculated from at least 5 offers; otherwise the wider country market is shown.
  4. 4We refresh the numbersStatistics are recomputed as new vacancies appear and closed ones drop out.

Figures are pay as published by employers: taxes, bonuses and seniority inside a grade are not accounted for.