| Co-working Space Rent |
Fixed |
Use $3,500/month from Month 1 through Month 60 in fixed overhead. |
Scaling rent with revenue instead of treating it as a monthly commitment. |
| Professional Services Legal and Accounting |
Fixed |
Use $2,000/month as recurring fixed overhead across the model period. |
Dropping it after launch even though the assumption runs through Month 60. |
| Internal Software Licenses |
Fixed |
Use $1,200/month in fixed operating expense for the relevant planning range. |
Tying the full license spend to customer count without a usage trigger. |
| Insurance and Admin |
Fixed |
Use $800/month as baseline overhead before calculating break-even revenue. |
Omitting small admin items that still raise the monthly break-even point. |
| Payment Processing Fees |
Variable |
Deduct 3.0% of revenue before calculating contribution margin. |
Putting card fees in fixed overhead instead of linking them to sales volume. |
| Affiliate and Referral Commissions |
Variable |
Deduct 5.0% of revenue in the first year, rising to 7.0% by the mature year. |
Using the first-year rate forever and overstating later contribution margin. |
| Cloud Infrastructure and Hosting |
Semi-variable |
Model as usage-linked delivery expense: 8.0% of revenue in the first year, declining to 6.0% by the mature year. |
Treating hosting as purely fixed and missing the load tied to active accounts. |
| Customer Success Manager |
Semi-fixed |
Add salary in staffing steps: $65,000/year per FTE, from 0.5 FTE in the first year to 4.0 FTE by the mature year. |
Treating all support labor as variable, which understates the monthly revenue needed before customer volume is high. |