| Commercial Rent |
Fixed |
Use $25,000 per month in fixed overhead from Month 1 through Month 60. |
Spreading rent across each sale and hiding the true monthly hurdle. |
| Wholesale Inventory Purchases |
Variable |
Apply 14.5% of first-year revenue, then adjust by year as the model percentage changes. |
Treating inventory buys, freight, shrink, and markdowns as fixed overhead. |
| Payment Processing Fees |
Variable |
Apply 3.2% of first-year revenue because fees rise directly with card sales. |
Leaving processing out of contribution margin and overstating break-even progress. |
| Sales Associate Labor |
Semi-variable |
Model staffing as volume-linked, with FTE rising from 2.5 in Year 1 to 6.5 in Year 5. |
Keeping labor flat even as visitor traffic and order volume grow. |
| Utilities |
Semi-fixed |
Start with $3,200 per month, then review in steps as store hours and workshop use expand. |
Assuming utilities move dollar-for-dollar with sales. |
| Maintenance |
Semi-fixed |
Use $1,200 per month as the base, with step increases when equipment use or traffic rises. |
Ignoring heavier wear during peak selling periods. |
| Insurance |
Fixed |
Use $1,800 per month as fixed overhead across the planning range. |
Linking insurance to monthly sales instead of policy coverage. |
| Cleaning Services |
Semi-fixed |
Start at $900 per month and increase in steps if traffic requires more service days. |
Holding cleaning flat after weekend traffic scales materially. |