| Studio rent, $3,500/month |
Fixed |
Raises monthly overhead by $3,500 from Month 1 through Month 60. |
Treating rent as session-linked and understating the break-even load. |
| Utilities, $450/month |
Fixed |
Raises monthly overhead by $450 within the current planning range. |
Moving all utilities into variable shoot expenses without usage data. |
| Business insurance, $150/month |
Fixed |
Raises monthly overhead by $150 regardless of monthly bookings. |
Leaving insurance out because it feels small. |
| Website hosting, accounting, legal, cleaning, and supplies, $500/month |
Fixed |
Raises monthly overhead by $500: $80 website, $300 accounting and legal, and $120 cleaning and supplies. |
Scattering admin bills across variable expenses and muddying contribution margin. |
| Photo printing and album production, 8% in the first year |
Variable |
Reduces contribution margin because it moves with sales tied to prints and albums. |
Counting print revenue but forgetting the production percentage. |
| Freelance retoucher fees, 5% in the first year |
Variable |
Reduces contribution margin as booked work creates editing demand. |
Modeling retouching as fixed when it should flex with volume. |
| Marketing and advertising spend, 10% in the first year |
Variable |
Reduces contribution margin when modeled as a revenue-linked selling expense. |
Double-counting it with the $12,000 first-year marketing budget. |
| Assistant, marketing specialist, and associate photographer FTE changes |
Semi-fixed |
Raises monthly overhead in steps as FTE coverage increases and new roles start. |
Smoothing hiring across all months instead of reflecting actual staffing steps. |