| Office rent |
Fixed |
Use $3,500/month in the fixed cost base before calculating required contribution. |
Spreading rent across orders and missing the cash hurdle in slow months. |
| Software subscriptions |
Fixed |
Use $1,200/month as recurring platform overhead across the planning range. |
Treating core software as if it rises with each order. |
| Fixed payroll |
Fixed |
Use about $33,333/month in the first year for founder, operations, support, marketing, tailor coordination, and tech support roles. |
Forgetting payroll when testing whether gross margin covers the monthly burn. |
| Tailor labor |
Variable |
Deduct $7.00 to $10.00 per order before measuring contribution margin. |
Treating remake labor and rush fixes as general overhead. |
| Fabric and minor materials |
Variable |
Apply the product-level amount per order, from $0.80 to $3.00 depending on service type. |
Using one blended material rate without checking product mix. |
| Shipping label |
Variable |
Deduct $0.50 per order as direct fulfillment drag. |
Hiding shipping inside overhead and overstating order profitability. |
| Payment gateway fee |
Variable |
Apply 0.2% of revenue as a sales-linked transaction charge. |
Modeling payment processing as flat despite revenue growth. |
| Customer Service Lead staffing |
Semi-fixed |
Step staffing from 1.0 FTE to 1.5 FTE and then 2.0 FTE as volume scales. |
Treating support as fully fixed when higher order volume needs more coverage. |