The AI Startup CFO Playbook: Token COGS, R&D Capitalization, and the New SaaS Metrics
Written by Harry Prabandham
Curated by Rubric Financial
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Why AI Companies Need a Different Finance Setup
- SaaS gross margins are 70-85% because the marginal cost to serve a customer is near zero. AI companies have REAL COGS: inference compute scales linearly with usage.
- Implication: 'flat-tier pricing' breaks at AI companies. A $99/mo tier that includes unlimited usage becomes loss-making when one customer hits 100x normal usage.
- Margins range wildly: pure inference resellers (OpenAI wrappers) often run 20-40% gross margin. Companies with proprietary models can hit 60-75%. Edge inference + smaller models can approach SaaS-like 80%+.
- Most early-stage AI startup financial models DON'T model token costs properly; they apply a flat 'COGS %' assumption that breaks at scale. Get this right early.
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About the author
Harry PrabandhamFounder & CEO
Founder and CEO of StartupCFO. MBA from Wharton, MS in Computer Science, and decades of experience building and advising venture-backed startups.
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