| Rent |
Fixed |
Include $3,500 per month in fixed overhead from Month 1 through Month 60. |
Treating rent as sales-linked when it must be covered even on slow days. |
| Utilities |
Semi-fixed |
Start with $800 per month, then test higher usage as refrigeration, production, and store hours increase. |
Holding utilities flat while traffic and equipment load rise. |
| Payroll |
Semi-variable |
Use about $20.6k per month in first operating year wages; manager, head role, and owner pay are steadier, while barista and kitchen staffing rises with traffic. |
Modeling all labor as fixed and missing the step-up in hourly coverage. |
| Coffee and beverage ingredients plus food ingredients and paper goods |
Variable |
Apply 15.0% of sales in the first operating year, falling to 11.0% by the mature year based on the model. |
Using a flat dollar amount instead of tying inputs and packaging to sales. |
| Payment processing fees |
Variable |
Apply 2.5% of sales in the first operating year, declining to 2.1% by the mature year. |
Leaving card fees out of contribution margin. |
| Marketing and promotions |
Variable |
Model as 2.0% of sales in the first operating year, declining to 1.6% by the mature year. |
Putting every promotion in fixed overhead instead of linking spend to sales activity. |
| Subscriptions, insurance, internet, cleaning, accounting, and legal |
Semi-fixed |
Start with $1,000 per month and increase only when service needs, operating scale, or outside support clearly step up. |
Ignoring small recurring bills because each line looks minor on its own. |