Free browser-local worksheet
Build a price you can explain.
Enter your own verified figures. The worksheet exposes direct cost, overhead allocation, cost base and a target-margin selling basis without supplying market rates or claiming quote accuracy.
Runs in this browser only. Nothing you enter is sent to Spectra.
Synthetic worked example
A fascia estimate, shown without preloading the form.
These are fictional teaching inputs, not market rates, customer data or a recommended price. Copy them only if you want to reproduce the maths; use your own verified figures for real work.
| Input or result | Transparent basis | Amount |
|---|---|---|
| Materials | Illustrative supplier basis | £720.00 |
| Bought-in components | Illustrative supplier basis | £280.00 |
| Labour | 18 hours × £38/hour | £684.00 |
| Installation / travel | Initial access assumption | £460.00 |
| Direct cost | Sum of direct inputs | £2,144.00 |
| Overhead allocation | 12% × £2,144.00 | £257.28 |
| Cost base | Direct cost + allocation | £2,401.28 |
| Selling basis | £2,401.28 ÷ (1 − 32%) | £3,531.29 |
Keep the record connected
Scope it. Calculate it. Revise it. Reconcile it.
The guide explains assumption, revision and actual-cost logic. The blank A4 and CSV templates provide a fuller record when a calculator alone is not enough.