How far over budget before you lose money?
Construction costs are climbing and margins have narrowed. Even a modest rise in total costs can be enough to turn a profitable development into a loss-making one.
This calculator shows you exactly how much headroom your project has before it stops being profitable. No sign-up required. Enter your numbers and see your cost overrun buffer.
Example project
A sample project so you can see how it works. Start typing in either field to model your own project.
Estimated total projected sales revenue
Estimated total costs incl. interest & contingency
These are example figures, not saved data — GRV and TDC are estimates, results are indicative only.
Feasibility
Cost overrun buffer = pre-tax profit ÷ total development cost. It shows how far costs can rise, in percentage terms, before the project breaks even or becomes loss-making beyond that point.
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