| Facility Rent |
Fixed |
Use $4,500 per month as a base operating load from Month 1 through Month 60. |
Spreading rent across each sale and making gross margin look worse than it is. |
| Owner, Instructor, Assistant, and Part-time Instructor Payroll |
Fixed |
Model planned full-time equivalent staffing as monthly overhead, not a per-order charge. |
Treating payroll as variable and missing the sales level needed to cover staffed hours. |
| Wholesale Ceramic Pieces |
Variable |
Apply 12% of revenue in the first year, then reduce by year as modeled. |
Booking inventory purchases as fixed overhead and hiding product-level margin pressure. |
| Studio Materials & Utilities |
Variable |
Use 7% of revenue in the first year for clay, glaze, and usage tied to classes and studio activity. |
Treating class supplies as fixed, which hides underfilled sessions. |
| Utilities Fixed Portion |
Fixed |
Use the $500 monthly base charge as fixed facility overhead. |
Treating all utilities as fixed, which hides firing waste. |
| Kiln-heavy Firing Usage |
Semi-variable |
Split the base utility load from usage that rises with firings and studio demand. |
Blending kiln usage into rent-like overhead and missing high-usage periods. |
| Cleaning Services |
Fixed |
Use $300 per month as a stable operating expense within the planned store setup. |
Moving cleaning into variable expense even when the monthly service contract is stable. |
| Software Subscriptions |
Fixed |
Use $150 per month as recurring overhead for the break-even base. |
Dropping small subscriptions from the model and understating monthly overhead. |