Total addressable market
Also called: TAM, total available market
ELI5
The biggest theoretically relevant market.
Used in conversation
“The TAM must use a stated boundary and method.”
Definition
The total annual demand or revenue opportunity if a product captured every customer within a clearly defined market.
Here “Total addressable market” means: The total annual demand or revenue opportunity if a product captured every customer within a clearly defined market.
Pitch context
You will see “Total addressable market” in strategy decks, market analyses, business plans and planning workshops when the discussion reaches market sizing & growth.
Why it matters: It helps a reader interpret market sizing & growth without confusing the measure, decision, role or evidence being discussed.
Connected terms
- Serviceable available marketTAM is the broad total theoretical market; SAM narrows it to the portion the offer and business can actually serve.
Sources & evidence · 5
Supporting source families. This entry is an editorial synthesis rather than a quotation from one canonical glossary.
- Strategyzer — Business Model Canvas resourcesSupporting source family · practitioner · checked 2026-08-16
- Strategyzer — Value Proposition Canvas resourcesSupporting source family · practitioner · checked 2026-08-16
- LEANSTACK — Lean CanvasSupporting source family · practitioner · checked 2026-08-16
- U.S. Department of Justice Antitrust Division — Herfindahl-Hirschman IndexSupporting source family · primary · checked 2026-08-16
- U.S. Census Bureau — Business and economy dataSupporting source family · primary · checked 2026-08-16