| Office Rent |
Fixed |
Include $2,500 per month in overhead before any job profit counts. |
Spreading rent across jobs and missing the monthly cash burden. |
| General Liability & Workers Comp Insurance |
Fixed |
Include $800 per month as recurring overhead during the planning range. |
Treating insurance as optional until hiring or job volume rises. |
| CRM & Scheduling Software Licenses |
Fixed |
Include $400 per month as operating overhead needed to book and dispatch work. |
Leaving software out because the payment feels small. |
| Direct Technician Labor |
Variable |
Model at 12% of revenue in the first year, falling to 10% by the mature year. |
Double counting risk: payroll salaries are fixed while direct labor is also modeled as 12% of revenue. |
| Materials and Supplies |
Variable |
Model at 7% of revenue in the first year, then 6% by the mature year. |
Parking repair materials in overhead instead of tying them to completed jobs. |
| Marketing & Advertising |
Variable |
Use 5% of revenue in the first year, declining to 4% by the mature year. |
Ignoring both the percentage model and the separate annual marketing budget. |
| Vehicle Fuel & Maintenance |
Variable |
Use 3% of revenue in the first year, falling to 2% by the mature year. |
Treating truck usage like rent instead of tying it to route volume. |
| Technician and Support Staffing |
Semi-fixed |
Add payroll in steps as capacity grows, such as technicians, lead technicians, and customer service roles. |
Assuming labor scales smoothly when salaries jump by full-time headcount. |