| Office Rent |
Fixed |
Include $3,500 per month in the fixed overhead hurdle. |
Spreading rent per book and hiding the monthly cash burn. |
| Software Subscriptions |
Fixed |
Include $800 per month before calculating break-even units. |
Linking subscriptions to sales volume without a usage trigger. |
| Core Editorial and Admin Payroll |
Fixed |
Include Publisher CEO $150,000, Managing Editor $80,000, Production Coordinator $60,000, and Administrative Assistant $45,000 per year. |
Treating salaried staff as variable because output rises. |
| Printing & Binding |
Variable |
Deduct per unit sold, from $0.50 to $2.00 depending on title. |
Using one blended rate when the title mix changes. |
| Author Royalties Fees |
Variable |
Deduct per unit where applicable, such as $0.70 for Fiction Novel and $1.00 for Business Guide. |
Treating royalties as fixed overhead instead of sales-linked margin drag. |
| Distributor Commission |
Variable |
Deduct 0.8% of revenue across each product line. |
Leaving distribution out of contribution margin. |
| Marketing & Promotion |
Semi-variable |
Model as revenue-linked spend, starting at 3.0% of revenue in the first year. |
Locking marketing at one monthly amount despite sales growth. |
| Sales & Distribution Manager |
Semi-fixed |
Add as a staffing step after launch, starting Month 13 and ramping from 0.5 FTE in Year 2. |
Adding the full salary in Month 1 before the role starts. |