Fixed-Price Construction Services / 10 hypothetical jobs / Flexible + Fixed pricing
How to read this model: We invented 10 realistic roofing jobs with varying complexity and cost outcomes.
The job table shows what each job costs us under flexible pricing (we always earn our margin, customer pays overages)
and fixed pricing (one guaranteed price, we absorb any overruns). The blended outcome weights these by the
flexible/fixed customer split and adds financing revenue. The annual projection scales that up with your opex
assumptions. The sensitivity table runs the same 10 jobs with worse overrun scenarios.
Change any input to see how the numbers move.
% added to estimated cost. Customer pays any overages.
% added to estimated cost. We absorb all overruns.
% of customers choosing fixed pricing
% of customers who finance
% annualised spread on financed amount
Job-Level Economics
#
Job
Roof (sqm)
Est. Cost
Actual Cost
Variance
Flex Quote
Flex P&L
Fixed Quote
Fixed P&L
Blended Outcome (per 10 jobs)
Annual Projection
After ramp (month 6+)
Hal + Graham combined monthly
Builder hire all-in (£55-60k salary + 25% on-costs)