| Base Platform Licensing |
Fixed |
Use $2,500 per month in the fixed monthly break-even base. |
Spreading it per student and hiding the true monthly platform hurdle. |
| General Administrative Software |
Fixed |
Use $800 per month as stable overhead across the monthly planning range. |
Linking it to enrollment when the model shows a flat monthly amount. |
| Professional Services Accounting |
Fixed |
Use $1,000 per month as recurring back-office overhead. |
Leaving it below the break-even line because it is not tied to sessions. |
| Payment Processing Fees |
Variable |
Apply 1.8% of revenue in the first year, declining by year in the model. |
Modeling it as fixed even though it rises with paid enrollments and sales. |
| Marketing and Advertising |
Variable |
Apply 8.0% of revenue in the first year as acquisition spend tied to sales volume. |
Using a flat monthly budget and missing the cash drag from growth. |
| Lead Tutor Math payroll |
Semi-fixed |
Use $10,000 per month in Year 1, then step it up as full-time equivalents increase. |
Treating tutor payroll as fully variable when staffing creates a fixed monthly hurdle. |
| Lead Tutor English payroll |
Semi-fixed |
Use $5,000 per month in Year 1, then increase it as tutor count scales. |
Assuming each booked session carries payroll perfectly, with no unused capacity. |
| Customer Support Specialist payroll |
Semi-fixed |
Exclude in Year 1, then add $3,750 per month from Year 2 when staffing begins. |
Forgetting the support step-up as enrollment and parent questions rise. |