| Shop Lease |
Fixed |
Include $2,500 per month before profit. This bill does not fall when daily visits are slow. |
Treating rent as a percent of sales, which understates losses in quiet months. |
| Payroll |
Semi-fixed |
Use $178,000 in first-year staffing, then change it only when headcount changes. |
Spreading labor as fully variable, even though staff must be paid before each extra job arrives. |
| Tailoring Supplies |
Variable |
Apply 3.0% of revenue in the first year because thread, fabric, buttons, and similar inputs rise with job volume. |
Ignoring supplies because the percentage looks small, which overstates gross margin. |
| Payment Processing Fees |
Variable |
Apply 2.5% of revenue in the first year because card fees move with paid transactions. |
Budgeting one flat monthly amount, which misses the fee increase as visits grow. |
| Performance Marketing |
Variable |
Apply 2.0% of revenue in the first year when the spend is tied to demand generation. |
Leaving it in fixed overhead while still assuming it drives new visits. |
| Utilities |
Semi-variable |
Model at $450 per month here, but review usage if longer shop hours or added equipment raise bills. |
Forgetting that pressing, lighting, and machine use can rise with operating scale. |
| Software Subscriptions |
Fixed |
Include $120 per month as stable overhead within the current planning range. |
Linking software to each sale when the subscription is billed monthly. |