| CRM and Project Management Software |
Fixed |
Use $450 per month in fixed overhead for the full planning period. |
Tying software spend to each client order. |
| Coworking Space Membership |
Fixed |
Use $1,200 per month as stable monthly overhead. |
Spreading workspace across billable hours as if it flexes monthly. |
| Legal and Accounting Retainer |
Fixed |
Use $800 per month below gross margin in break-even math. |
Treating the retainer like a transaction fee. |
| Contractor Writing Fees |
Variable |
Apply 15.0% of revenue in the first year, declining to 13.0% in the mature year. |
Treating contractor pay as fixed overhead. |
| Plagiarism and Grammar Tooling |
Variable |
Apply 2.0% of revenue in the first year, declining to 1.2% in the mature year. |
Ignoring usage-linked review tools in gross margin. |
| Referral and Partnership Commissions |
Variable |
Apply 8.0% of revenue in the first year, declining to 6.0% in the mature year. |
Putting commissions in marketing overhead instead of per-sale expense. |
| Merchant and Payment Processing Fees |
Variable |
Apply 3.5% of revenue in the first year, declining to 2.7% in the mature year. |
Forgetting card fees when calculating contribution margin. |
| Staff Salaries |
Semi-fixed |
Model salaries in hiring steps as FTEs increase by year and role. |
Smoothing hiring as a perfect percentage of revenue. |