| Office rent |
Fixed |
Carry $1,500/month as fixed overhead from Month 1 through Month 60. |
Spreading rent across jobs and hiding the monthly cash floor. |
| Utilities |
Fixed |
Carry $300/month as fixed overhead within the planning range. |
Treating a small monthly bill as revenue-linked. |
| Business insurance |
Fixed |
Carry $250/month as fixed overhead before calculating contribution margin. |
Leaving insurance out until cash runs tight. |
| Cleaning staff payroll |
Semi-fixed |
Model payroll by full-time equivalent: $35,000 per FTE, rising from 5.0 FTE in the first year to 25.0 FTE in the mature year. |
Treating cleaner payroll as fully variable when FTE hiring creates a monthly payroll floor. |
| Eco-friendly cleaning supplies |
Variable |
Apply 5.0% of revenue in the first year, declining to 4.0% in the mature year. |
Budgeting supplies as one flat monthly purchase. |
| Payment processing fees |
Variable |
Apply 2.5% of revenue in the first year, declining to 2.0% in the mature year. |
Forgetting card fees when pricing recurring subscriptions. |
| Cleaner travel and logistics |
Variable |
Apply 6.0% of revenue in the first year, declining to 5.0% in the mature year. |
Using average mileage while ignoring route density. |
| Equipment maintenance and depreciation |
Semi-variable |
Model 3.0% of revenue in the first year, declining to 2.5% in the mature year, with a base maintenance floor for active equipment. |
Treating equipment wear like a pure sales commission. |