| Office lease |
Fixed |
Include $12,000/month in fixed operating overhead from Month 1 through Month 60. |
Spreading rent across orders and making break-even look easier at low volume. |
| Software subscriptions and CRM |
Fixed |
Include $2,500/month as fixed overhead for the relevant monthly planning range. |
Treating core tools as optional even though the team needs them before scale. |
| Buyer and seller acquisition budgets |
Semi-variable |
Model first-year spend at $650,000/year, then tie added spend to buyer CAC and seller CAC. |
Treating paid acquisition as fully fixed when CAC moves with growth targets. |
| Server hosting and cloud infrastructure |
Semi-variable |
Use 4.5% of revenue in the first year, with the rate declining to 2.5% by Year 5. |
Budgeting one flat hosting bill while traffic, tracking, and deal feeds expand. |
| Payment gateway transaction fees |
Variable |
Apply 3.5% of revenue in the first year because fees move with transaction volume. |
Leaving gateway fees below the contribution line and overstating margin per order. |
| Affiliate partner commissions |
Variable |
Apply 5.0% of revenue in the first year, falling to 3.0% by Year 5. |
Counting gross commission revenue without subtracting partner payouts tied to sales. |
| Customer support outsourcing |
Variable |
Apply 3.0% of revenue in the first year as support tickets rise with buyers and orders. |
Treating moderation and support as fixed even when ticket volume follows usage. |
| Payroll |
Semi-fixed |
Use $820,000/year in the first year, then step up as senior developers, marketing, and sales headcount grow. |
Scaling revenue without adding people, which understates the break-even revenue needed. |