| Office rent |
Fixed |
Use $3,000/month in the fixed overhead base from Month 1 through Month 60. |
Scaling rent with order volume when it should stay flat in the monthly break-even range. |
| General legal and regulatory |
Fixed |
Use $1,500/month as recurring overhead separate from transaction-specific compliance review. |
Blending general legal retainers with per-transaction compliance work and muddying contribution margin. |
| Platform maintenance and security |
Fixed |
Use $2,000/month as baseline platform overhead needed before incremental orders are served. |
Moving all platform spend into variable hosting and overstating margin lift from sales growth. |
| Payroll |
Semi-fixed |
Model payroll as capacity steps: $500,000 in the first year, then $620,000 in the second year as support and seller success roles start. |
Smoothing headcount evenly by month and missing the cash step when new full-time roles begin. |
| Payment processing fees |
Variable |
Apply 3.8% of revenue in the first year, improving to 2.8% by the fifth year. |
Treating high-risk processing as fixed overhead; it rises with each paid order. |
| Performance marketing and advertising |
Variable |
Apply 10.0% of revenue in the first year, falling to 6.0% by the fifth year as efficiency improves. |
Using only the annual budget and ignoring order-linked paid acquisition drag on contribution margin. |
| Transaction-specific compliance and legal |
Variable |
Apply 1.0% of revenue in the first year, falling to 0.6% by the fifth year. |
Treating compliance review as fixed overhead instead of a sales-linked burden. |
| Seller and buyer acquisition budgets |
Semi-variable |
Model as growth-linked spend: seller acquisition budget rises from $150,000 to $280,000, while buyer acquisition rises from $200,000 to $400,000 from the first to second year. |
Locking acquisition spend as fixed while CAC and growth targets change each year. |