| Commercial Rent |
Fixed |
Add $5,000/month to fixed overhead before calculating member revenue needed to break even. |
Treating rent as if it falls when class occupancy drops. |
| Utilities |
Fixed |
Add $800/month as fixed overhead because the model gives one monthly amount. |
Spreading it per class without a usage driver in the forecast. |
| Fixed Studio Overhead Bundle |
Fixed |
Add $1,450/month for software, insurance, cleaning, music licensing, office supplies, and maintenance. |
Leaving small monthly bills out because each line feels minor. |
| Base Staff Payroll |
Semi-fixed |
Use $18,751/month in the first year for manager, lead instructors, front desk, and marketing coordinator payroll. |
Calling all payroll variable when staffing steps up with the schedule. |
| Specialized Workshop Materials |
Variable |
Apply 3.0% of revenue in the first year, declining to 1.5% by the fifth year. |
Budgeting materials as a flat monthly number despite sales-linked use. |
| Payment Processing Fees |
Variable |
Apply 2.5% of revenue across all forecast years. |
Forgetting that card fees rise with every paid membership. |
| Marketing and Advertising |
Variable |
Apply 10.0% of revenue in the first year, then step down to 4.0% by the fifth year. |
Locking marketing as fixed when the forecast ties it to sales. |
| Instructor Contractor Fees Workshop Specific |
Variable |
Apply 4.0% of revenue in the first year, declining to 2.0% by the fifth year. |
Mixing workshop contractors into salaried instructor payroll. |