| Office Rent |
Fixed |
Include $2,500 per month as overhead from Month 1. |
Burying rent inside per-read economics. |
| Cybersecurity & Data Backup |
Fixed |
Include $1,200 per month before volume assumptions. |
Skipping it because reads are remote. |
| General Malpractice Insurance (Entity) |
Fixed |
Include $1,500 per month before contract start. |
Adding it only after revenue begins. |
| Operations Manager wages |
Semi-fixed |
Model salary in FTE steps: 0.5 in the first year, then 1.0, 1.5, and 2.0 as scale rises. |
Treating staffing as smooth per-read spend. |
| Radiologist Per-Read Compensation |
Variable |
Apply 12.0% of revenue in the first year, declining to 10.0% by the mature year. |
Counting it as fixed payroll. |
| Specialized Imaging Software Licenses |
Variable |
Apply 2.0% of revenue in the first year, declining to 1.5% by the mature year. |
Mixing it with general software subscriptions. |
| Sales and Marketing |
Semi-variable |
Model as 5.0% of revenue in the first year, then taper to 4.0% as the practice scales. |
Assuming every marketing dollar scales perfectly with reads. |
| Professional Services (Volume-Dependent) |
Semi-variable |
Model as 2.0% of revenue in the first year, declining to 1.5% by the mature year. |
Leaving review, billing, or support work in fixed overhead. |