| Specialized Office Rent |
Fixed |
Carry $12,000/month as baseline overhead before any project margin. |
Allocating rent to active jobs and understating slow-month burn. |
| BIM and CAD Subscriptions |
Fixed |
Carry $2,200/month as a standing operating expense. |
Treating core design software as optional project spend. |
| Utilities and High Speed Data |
Semi-variable |
Start with the $1,100/month base and monitor project file-transfer usage. |
Leaving data-heavy project activity buried in fixed overhead. |
| Subcontractor Labor Pool |
Variable |
Model at 10.0% of first-year revenue, then use the forecast rate by year. |
Calling project labor overhead and overstating contribution margin. |
| Sales Commissions |
Variable |
Model at 3.0% of revenue as jobs are sold. |
Using a flat monthly amount after sales volume changes. |
| Turnkey suite unit materials |
Variable |
Use $44,000/project for listed materials tied to each build. |
Treating shielding components as fixed inventory burn. |
| Hybrid OR Conversion unit materials |
Variable |
Use $60,000/project for listed conversion materials. |
Averaging these materials into lower-complexity project work. |
| Senior Project Manager |
Semi-fixed |
Add salary capacity in steps as headcount rises from 1.0 to 5.0 FTE. |
Scaling management payroll as a simple percentage of revenue. |