---
title: Total addressable market (TAM)
description: The total addressable market (TAM) represents the full revenue opportunity available for a product or service if it achieved 100% market share.
---

[B2B marketing glossary ](https://mixology-digital.com/glossary)

# [Total addressable market (TAM)](https://mixology-digital.com/glossary/tam)

 Written by [Mixology Digital](https://mixology-digital.com/glossary/author/mixology-digital) | Nov 14, 2025 12:36:18 PM

The total addressable market (TAM) represents the full revenue opportunity available for a product or service if it achieved 100% market share. It provides a high-level view of commercial potential and is often used during strategic planning, investment discussions, and product development.

In B2B marketing, understanding TAM helps organisations quantify the size of a market and identify its long-term growth opportunities. It sets the outer boundary for how large the business could potentially scale within a given category. TAM calculations may be based on number of companies, total spend, or similar macro-level indicators.

While TAM offers the broadest perspective, it’s most valuable when paired with [serviceable addressable market (SAM)](https://mixology-digital.com/glossary/sam) and [serviceable obtainable market (SOM)](https://mixology-digital.com/glossary/som). Together, these metrics help teams distinguish between theoretical potential, realistic opportunity, and achievable market share, resulting in more grounded, data-driven planning.

[View full post](https://mixology-digital.com/glossary/tam)

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