Beyond TAM/SAM/SOM

Building investor-ready financial models

WITH SYDNEY RANKIN

Many founders misuse TAM/SAM/SOM by treating market sizing as the foundation of their financial model. This often leads to unrealistic forecasts, weak go-to-market assumptions, and investor pushback or outright declines.

This session will show you:

Why relying on TAM/SAM/SOM as the starting point creates fragile financial plans.
How to build a bottom-up forecast grounded in your pricing, sales cycles, and customer assumptions.
The role of TAM/SAM/SOM as a validation tool to test assumptions and highlight scalability.
How to turn defensible numbers into a stronger investor story and more credible go-to-market strategy.

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September 24, 2025
12:00PM MST / 2:00PM EST

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This session is for early-stage founders preparing to raise capital who want to turn market sizing into a credible, investor-ready financial model.

This session will show founders how to move beyond the common pitfall of building financial models around TAM/SAM/SOM by starting with a bottom-up forecast rooted in their own pricing, sales cycles, and customer assumptions.

We’ll then demonstrate how to use market sizing as a validation tool to strengthen both the credibility of their numbers and the defensibility of their investor story.

What this session

will cover

About the Speaker

Sydney Rankin

Head of Growth, Profitual

Connect with Sydney on LinkedIn.

Sydney Rankin is the Head of Growth at Profitual, the fintech making financial modeling fast, simple, and investor-ready for early-stage founders. Coming from venture captial, she’s reviewed hundreds of startup financial models and seen firsthand what gets investors to say “yes" and non-accountants to understand their numbers. Sydney is especially passionate about helping women founders gain the financial confidence to raise capital and scale on their own terms.

WITH BRETT THALMANN AND ARTHUR LAM

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