Serviceable addressable market (SAM)
Also known as: SAM, serviceable available market
In short
Serviceable addressable market (SAM) is the portion of the total addressable market that your product and sales model can actually serve. It applies limits such as region, language, company size, and product fit.
SAM sits between TAM, the theoretical ceiling, and SOM, the share you can realistically win. It is the number most useful for planning coverage because it reflects who you can sell to today.
How to calculate SAM
Start with TAM and remove what you cannot serve.
Bottom-up example
Say TAM is 20,000 companies. Your product supports only two languages, which covers 12,000. Your sales team covers only mid-market and enterprise, leaving 7,000. At $15,000 average annual contract value, SAM is about $105 million.
Common filters
Geography, language, compliance requirements, integrations supported, company size, and channels you operate in.
TAM vs. SAM vs. SOM
- TAM: Everyone who could buy. A ceiling.
- SAM: The part you can serve with your current product and go-to-market.
- SOM: The share of SAM you can realistically win in a set period.
How GTM teams use SAM
- Coverage planning: Decide how many reps and accounts are needed to work the market.
- Prioritization: Compare segments inside SAM before investing.
- Roadmap decisions: See how much new SAM an integration or new region would unlock.
- Goal checks: Test whether a revenue target is plausible against the serviceable market.
Common mistakes
- Copying TAM: Calling the whole market serviceable ignores real constraints.
- Using top-down only: A generic report percentage hides who the accounts are. Build from real account counts.
- Not updating: SAM grows as your product, regions, and channels expand.
Serviceable addressable market FAQs
What is serviceable addressable market (SAM)?
Serviceable addressable market is the part of the total addressable market that your product and go-to-market model can actually serve, after limits such as region, language, company size, and product fit. It is a subset of TAM.
How do you calculate SAM?
Start with your TAM, then remove accounts you cannot serve because of geography, language, size, compliance, or missing features. Multiply the remaining account count by your expected annual contract value to get SAM in revenue terms.
How do TAM, SAM, and SOM differ when planning coverage?
TAM is the total market if every possible customer bought. SAM is the portion you can serve with your current product and sales model. SOM is the share of SAM you can realistically win within a given period.
Why does SAM matter more than TAM for planning?
TAM is a theoretical ceiling, while SAM reflects who you can actually sell to today. Coverage, hiring, and target decisions based on SAM are more realistic because they account for real product and go-to-market limits.
