Cost Modeling: Full‑Time Salary vs Monthly Subscription vs Fractional Hours

AI · 6 min read

A rigorous cost model starts with all direct expenses: salary, benefits, recruiting fees, equipment, and overhead for a full‑time hire; versus monthly retainer fees, project surcharges, and transition costs for subscription teams; and per‑hour rates for fractional engagements. Don’t forget indirect costs like onboarding time, lost opportunity during ramp, and the cost of delayed launches when capacity is constrained.

Build scenarios for steady state work, bursty demand, and a pivot situation. For example, if a startup needs 60–80 design hours a week steady for a year, a full‑time hire may be cheapest. But if the workload is 20 hours/week steady with 6–8 week bursts of 200 hours for major releases, subscription or fractional models often win. Include sensitivity analysis: what happens if you double discovery needs or if the product roadmap stalls?

Finally, incorporate qualitative multipliers: access to senior expertise, responsiveness, and recruiting risk. These are hard to monetize but often decisive. Present the board or leadership team with a simple dashboard that shows break‑even points, best‑case/worst‑case outcomes, and recommended contracts to match your product rhythm. Cost is important, but matching capability to cadence and risk tolerance is the real win.