technical debt calculator
What is legacy maintenance actually costing you?
Adjust the numbers to match your team. Everything updates live — this is a directional estimate, not a quote, meant to make the cost of standing still visible.
Engineering team size5 engineers
Developers who touch this system regularly.
Average fully-loaded cost per engineer£70,000/yr
Salary plus benefits, overhead, and tooling.
Share of capacity spent on legacy maintenance30%
Time spent patching, firefighting, and working around old code instead of shipping new features.
Production incidents per month4
Average hours to diagnose & resolve one incident6 hrs
// estimated annual cost
£0
of engineering capacity spent maintaining legacy code instead of building
Equivalent to
0.0 engineers
Per month
£0
Of which, incident firefighting
£0
Incident firefighting is typically part of the maintenance share above, not additional to it — it's broken out here to show roughly how much of that time is reactive.
Book a Migration Audit Also take the Stack Assessment →