| Fixed payroll |
Fixed |
Use $530,000 per year, or about $44,167 per month, as recurring overhead in the first year. |
Treating headcount as variable just because transaction volume rises. |
| Office rent |
Fixed |
Use $1,500 per month from Month 1 through Month 60 in the fixed overhead base. |
Spreading rent across orders and hiding the true monthly nut. |
| Software subscriptions |
Fixed |
Use $800 per month as fixed platform overhead for the planning range. |
Linking core software spend to sales without a usage trigger. |
| Legal and accounting services |
Fixed |
Use $1,000 per month as recurring compliance and back-office overhead. |
Leaving it below the break-even line because it feels administrative. |
| Server Hosting & CDN |
Variable |
Apply 3.0% of revenue in the first year, falling to 2.0% by the fifth year. |
Modeling hosting as flat when traffic and order volume drive usage. |
| Payment Gateway Fees |
Variable |
Apply 2.5% of revenue in the first year, falling to 2.0% by the fifth year. |
Forgetting payment fees in contribution margin, which overstates break-even progress. |
| Affiliate Marketing Payouts |
Variable |
Apply 4.0% of revenue in the first year, falling to 3.0% by the fifth year. |
Putting affiliate payouts in fixed marketing instead of per-sale expense. |
| Platform audits and compliance workflows |
Semi-fixed |
Keep the listed $500 monthly security audit base fixed, then model added compliance layers only when scale forces a step-up. |
Using one flat audit number forever and ignoring scale-driven review work. |