Complete Definition
Serviceable Addressable Market (SAM) is the segment of TAM that your product or service can actually reach and serve. It accounts for practical limitations like geography, technology, and business model constraints.
How to Calculate SAM
SAM = TAM × Percentage You Can Actually Serve
Factors That Define SAM
- Geographic reach - Language and localization - Regulatory constraints - Technology requirements - Pricing accessibility - Channel availability - Product capabilities
SAM vs TAM
If TAM is "everyone who could possibly need this," SAM is "everyone we could realistically sell to with our current or planned capabilities."
Example
- TAM: Global CRM market = $50B - Your product: Cloud-based, English-only, SMB-focused - SAM: US/UK SMB cloud CRM = $5B
Why SAM Matters
- More realistic opportunity sizing - Better for strategic planning - Shows market understanding - More credible to investors - Guides go-to-market strategy