| Shared Office Space |
Fixed |
Include $3,500/month in base overhead from Month 1 through Month 60. |
Treating workspace as sales-linked because headcount may rise later. |
| Legal Maintenance and Trademark Filing Fees |
Fixed |
Include $1,200/month in fixed overhead for the monthly break-even floor. |
Modeling it as a one-time filing instead of a recurring monthly expense. |
| External Research Database Subscriptions |
Variable |
Apply 6% of first-year revenue, then use the lower modeled percentages by year. |
Treating percentage-based research subscriptions as Fixed when the model applies them to revenue. |
| Freelance Creative Proofreading |
Variable |
Apply 4% of first-year revenue, falling to 2% by the mature year. |
Budgeting a flat retainer instead of tying review work to sales volume. |
| Sales Commissions and Referral Fees |
Variable |
Apply 8% of revenue in the first two years, then the modeled lower rates. |
Leaving commissions inside payroll, which overstates contribution margin. |
| Payment Processing Fees |
Variable |
Apply 3% of revenue in every model year. |
Forgetting processing fees on retainers, workshops, and package payments. |
| Core Staffing Payroll |
Semi-fixed |
Add capacity in steps as FTE levels rise across strategist, copywriter, coordinator, and business development roles. |
Spreading payroll as a smooth revenue percentage instead of modeling hiring steps. |
| Annual Marketing Budget |
Semi-variable |
Manage spend against CAC: $45,000 budget and $850 CAC in the first operating year. |
Treating all marketing as Fixed when spend changes with lead volume targets. |