Taking project size as its origin, this Calculator gives an estimate of the maintenance effort, and consequently the related financial effects, that you can expect over the years of the project's lifetime.

According to your settings, two data series are calculated:

This allows for a comparison of the two data series under otherwise unchanged conditions and thereby gives you an adequate first picture of the financial implications of such an additional investment.

You can inspect concrete values for the calculated data series by hovering with the mouse over the respective columns of the diagram's x-axis.
Also, there's a short explanation available for each calculation item, if you hover over the help-button button.

Please keep in mind that the Calculator results should be taken only as rough approximations. The calculations are based on industry-averages and some reasonable assumptions. ( This section on the FAQ page provides some additional information.) However, since it cannot take any person-, project-, or company-specific aspects into account, it does not replace nor contradict the need for a more detailed project assessment.

If you have questions, remarks, or something else that you want to say, then you can leave a comment on this page. Alternatively, you may want to discuss specific aspects with other people in one of the forums.

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Key Facts

If you invest an additional amount of  , you can expect to

  • save a total amount of   over the expected project lifetime of  years. This is equal to a Return on Investment of .
  • yearly save an average amount of   on maintenance (ranging from  to  ).
  • reach financial break-even after  years (compared to when no additional investment is made).

The following values are assumed for C#:

  • Estimated project size in Function Points: .
  • Estimated project size in Source Lines of Code: .

Cost Breakdown

Baseline Surplus Diff.
Maint. % -

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