Different work, same commercial question
Job-pricing blind spots by trade.
The calculator is shared, but the costs most likely to disappear are not. Start with examples that sound like the work you actually do.
Builders
Programme risk, scope dependencies, subcontractors, materials and customer changes.
See pricing guidance →Plumbers
Diagnosis, call-outs, sourcing, travel, small-job minimums and return visits.
See pricing guidance →Electricians
Testing, certification, remedial uncertainty, access and specialist materials.
See pricing guidance →Decorators
Preparation, protection, drying time, coats, surface defects and occupied homes.
See pricing guidance →Why there is one calculator rather than a copy for every trade
The underlying commercial calculation is the same: complete cost, uncertainty, profit target, selling price and payment pressure. Separate duplicate calculators would compete with one another in search and become harder to maintain. The trade pages explain where to look; the main calculator owns the calculation.