Contingency Allowance Calculator
Enter your values below and press calculate.
Enter your values above to see the result.
Formula used
Budget cost = base cost + percentage contingency + fixed risk allowance.
Example
£80,000 base cost with 10% contingency and £2,500 fixed risk allowance gives £90,500.
Important note
Contingency should be based on real project risks where possible, not just a blanket percentage.