| Commercial Rent |
Fixed |
Include $10,000 per month in overhead before calculating visit volume needed to break even. |
Tying rent to daily visits instead of treating it as a monthly commitment. |
| Scheduled Staffing Roles |
Semi-fixed |
Model salaries by full-time equivalent ramp, since manager, stylist, nail technician, and receptionist coverage rises in steps. |
Ignoring FTE ramps and making payroll look too smooth. |
| Professional Product Use |
Variable |
Apply 5.0% of revenue as service volume grows from cuts, color, and nail work. |
Treating salon product use as a one-time supply buy. |
| Retail Product Cost |
Variable |
Apply 3.0% of revenue tied to retail add-on sales. |
Counting retail add-on revenue without matching product spend. |
| Marketing Promotions |
Variable |
Apply 4.0% of revenue so discounts and promotions scale with sales activity. |
Burying launch promotions in fixed overhead. |
| Payment Processing Fees |
Variable |
Apply 2.5% of revenue, since card fees rise with paid transactions. |
Forgetting that higher card volume raises fees. |
| Utilities |
Semi-variable |
Start with the $1,200 monthly baseline, then watch usage pressure as visits climb. |
Assuming water, power, and laundry usage never change. |
| Software Subscriptions |
Fixed |
Include $250 per month in fixed overhead for the planning range. |
Spreading a fixed subscription across visits as if it varies per booking. |