Riff-in-Thyme said:
The equation I was given by those I worked for as far as providing a quote for painting was to estimate the hours and material costs, multiply that by 3 and then double that. This equation was supported as the only method to guarantee that a profit is maintained. How accurately calculable is that as a quoting philosophy?
I quote of time and materials jobs all the time…
to assist with transparency in the quoting process and to help people compare apples with apples I do the following
itemise the job as best you can and estimate the hours (including a slight contingency) to paint each bit as well as the amount of materials required (again itemised – paint, brushes, rollers, drop cloths etc…)
then multiply the hours by a standard chargout rate. This is where you can build in the margin. The chargeout rate should probably be the annual base wage plus on costs, divided by the number of chargable hours in a year. See the calculation below as en example
52 weeks per year (calendar time)
-4 weeks annual leave (non resourced time)
48 weeks per year (resourced time)
80% utilisation
38.4 weeks per year
40 hours per week
1,536 hours per year (chargeable)
$80,000 per year (required annual salary)
$52/hr (base charge out rate)
then add a multiplier to suit your situation. In my role I generally apply a 2.0 to a 2.5 time multiplier on the base rate to get the chargeout rate.