SpectraFree costing worksheet
Price the work you can explain.
Build a transparent cost base from your own figures, then see the selling price required for a target margin. No market rates or claimed quote accuracy are baked in.
Runs in this browser only. Nothing you enter is sent to Spectra.
Worked fixture and limits
The loaded synthetic fixture uses £640 materials, 12 labour hours at £35/hour, £120 bought-in work, £180 install, 12% overhead and a 35% target margin. GBP is the displayed currency; hours and percentages remain explicit in the CSV. Zero values are permitted, but negative figures and margins of 100% or more are rejected.
Read the job costing guide for variance and reconciliation prompts.