List Decay
List Decay: The natural invalidation of contact data over time as people change jobs, companies restructure, and addresses die — roughly 22–30% per year in B2B.
Definition
The natural invalidation of contact data over time as people change jobs, companies restructure, and addresses die — roughly 22–30% per year in B2B.
List Decay: The natural invalidation of contact data over time as people change jobs, companies restructure, and addresses die — roughly 22–30% per year in B2B, per the B2B Data Index glossary (2026).
#Why it matters in practice
The reason verification is recurring, not one-time: any list older than a quarter needs re-verification before sending.
Related terms
Data Enrichment · Firmographics · Technographics · full glossary
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Browse LeadsBlue databasesFrequently asked questions
What is list decay?
The natural invalidation of contact data over time as people change jobs, companies restructure, and addresses die — roughly 22–30% per year in B2B.
Why does list decay matter?
The reason verification is recurring, not one-time: any list older than a quarter needs re-verification before sending.
APA
B2B Data Index Research Team. (2026). What Is List Decay? Definition & Why It Matters (2026). B2B Data Index. https://b2bdataindex.com/glossary/list-decay/
Markdown
[What Is List Decay? Definition & Why It Matters (2026)](https://b2bdataindex.com/glossary/list-decay/) — B2B Data Index, 2026