| Office Rent |
Fixed |
Add $3,500 per month to fixed overhead in the break-even numerator. |
Allocating rent as a percentage of each project instead of treating it as monthly overhead. |
| Business Insurance |
Fixed |
Add $300 per month to fixed overhead because it stays stable across the planning range. |
Linking insurance to project count when the model treats it as a recurring monthly expense. |
| General Software Subscriptions |
Fixed |
Add $800 per month to fixed overhead unless a separate usage fee is billed by activity. |
Putting the full subscription line into variable expense just because software supports delivery. |
| Project Hardware & Materials |
Variable |
Reduce contribution margin by 12.0% of revenue in the first year. |
Putting project materials into fixed overhead, which understates the revenue needed to break even. |
| Subcontractor Installation Fees |
Variable |
Reduce contribution margin by 8.0% of revenue in the first year. |
Treating outside installation labor as fixed payroll before job volume supports that choice. |
| Sales & Marketing Commissions |
Variable |
Reduce contribution margin by 5.0% of revenue in the first year. |
Mixing commissions with the annual marketing budget, which hides true sales-driven expense. |
| Utilities and Software Usage Overages |
Semi-variable |
Keep the $500 utilities base and $800 software base in fixed overhead; add usage-linked overages to variable expense when incurred. |
Treating every studio usage increase as fixed, even when charges rise with production activity. |
| Salaried Team Expansion |
Semi-fixed |
Add payroll as fixed capacity, stepping from $475,000 in the first year to $635,000 in the second year. |
Modeling salaries as a smooth percentage of sales instead of step changes tied to hiring. |