Subcontractor Cost Calculator
Enter your values below and press calculate.
Enter your values above to see the result.
Formula used
Subcontract cost = quantity × subcontract rate + prelims allowance + risk allowance + fixed extras.
Example
2,000m³ at £8.50/m³ = £17,000. Add 5% prelims and 7.5% risk, plus £1,000 fixed costs, for an estimated package cost of £20,125.
Important note
Use this for quick sense-checking only. Always refer to subcontract scope, exclusions, attendance, programme constraints and payment terms.