Total Addressable Market (Step-by-Step Guide to Market Sizing)
Total Addressable Market is one of the most misunderstood concepts in B2B strategy. Too many founders inflate their TAM with generic industry reports, while others undersell their opportunity by thinking too narrowly. In this video, TK Kader demystifies market sizing with a practical, step-by-step approach that produces numbers you can actually defend in investor meetings and board presentations. He covers the three core methodologies --- top-down, bottom-up, and value-theory --- and explains when to use each. More importantly, he shows you how to derive your TAM from real customer data rather than analyst reports, making your market sizing both credible and actionable. Kader also addresses the common trap of conflating TAM with SAM and SOM, and explains how to present each layer of the market sizing pyramid clearly. This is essential viewing for founders preparing fundraising decks, product marketers building business cases, and GTM leaders sizing new market opportunities.
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About This Video
Total Addressable Market is one of the most misunderstood concepts in B2B strategy. Too many founders inflate their TAM with generic industry reports, while others undersell their opportunity by thinking too narrowly. In this video, TK Kader demystifies market sizing with a practical, step-by-step approach that produces numbers you can actually defend in investor meetings and board presentations. He covers the three core methodologies --- top-down, bottom-up, and value-theory --- and explains when to use each. More importantly, he shows you how to derive your TAM from real customer data rather than analyst reports, making your market sizing both credible and actionable. Kader also addresses the common trap of conflating TAM with SAM and SOM, and explains how to present each layer of the market sizing pyramid clearly. This is essential viewing for founders preparing fundraising decks, product marketers building business cases, and GTM leaders sizing new market opportunities.
What You'll Learn
- ♦The three TAM calculation methodologies and when to use each one
- ♦How to build a bottom-up TAM model using actual customer data instead of generic reports
- ♦The critical distinction between TAM, SAM, and SOM --- and how to present all three
- ♦Common TAM mistakes that cause investors to dismiss your market sizing
- ♦How to validate your market sizing assumptions with primary and secondary research
- ♦A repeatable process for updating TAM as you learn more about your market
- ♦How to translate TAM analysis into a compelling narrative for your pitch deck