| Fixed operating overhead |
Fixed |
Carry $11,100/month: office rent $4,500, professional liability $1,200, legal and compliance $2,500, software and CRM $800, utilities and internet $600, and accounting and tax $1,500. |
Treating stable admin overhead as a percent of revenue. |
| Transaction processing fees |
Variable |
Deduct 3.5% of revenue in Year 1, easing to 3.0% by Year 5, before calculating contribution margin. |
Using gross revenue as contribution and missing payment drag. |
| Equipment insurance premiums |
Variable |
Deduct 6.0% of revenue in Year 1, falling to 4.0% by Year 5. |
Burying inspection, repair, delivery fuel, replacement reserve, or fleet depreciation in margin without separate inputs. |
| Cloud hosting and API infrastructure |
Variable |
Model 4.0% of revenue in Year 1, declining to 2.0% by Year 5 as scale improves. |
Calling hosting fixed when usage rises with orders, sessions, and transactions. |
| Customer support outsourcing |
Variable |
Use 5.0% of revenue in Year 1, dropping to 3.0% by Year 5. |
Understaffing support in the model while order volume grows. |
| Payroll |
Semi-fixed |
Model Year 1 staffing at $380,000 annually, then step up when the Customer Success Lead starts in Year 2. |
Spreading payroll as a revenue percentage instead of using hiring steps. |
| Marketing |
Semi-variable |
Model first-year spend at $165,000 total: $45,000 for seller acquisition and $120,000 for buyer acquisition. |
Treating all marketing as fixed when spend is tied to acquisition volume. |