TAM, SAM, SOM worksheet.
A bottom-up TAM, SAM, and SOM worksheet for building a market estimate from customers, pricing, reach, and realistic capture assumptions.
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Inside the file
Market size without fantasy maths
Clarity earns the next conversation.
A giant industry report number says almost nothing about your business. Bottom-up sizing shows who can buy, what they pay, which segment you can serve, and what share is plausible.
Built for
Founders preparing a pitch deck, strategy memo, or market entry plan that needs defendable market-size logic.
The parts investors expect.
Make it yours. Make it true.
Define the paying customer precisely
Find credible volume inputs
Apply realistic serviceability filters
Show the assumptions beside the result
Three mistakes that kill confidence.
Calling an industry report your TAM
Mixing users, customers, and transactions
Claiming an obtainable market without a distribution plan
Related founder templates.
Stop staring at a blank file.
Download the template, replace the examples with evidence, and get the round moving.