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Data hygiene

Why your lead list decays — and what to do about it

DR
Written by
Daniel Reyes · Data Quality Lead
Jun 12, 2026 · 4 min read

That list you built last year isn't the list you have today. People change jobs, switch numbers, and abandon inboxes. Left alone, a contact list quietly rots — and takes your deliverability with it.

Data decays around 2% a month

Industry estimates put B2B contact decay between roughly 22% and 30% per year — and some segments far higher. Every month, a slice of your list becomes undeliverable without you doing anything wrong.

Where the rot comes from

  • Job changes abandon work emails and direct lines.
  • Phone numbers get reassigned or disconnected.
  • Free inboxes go dormant and start bouncing.
  • Duplicate records pile up across imports and tools.

Stay ahead of it

Treat list hygiene as routine, not a one-time cleanup. Re-verify before every major send, validate new contacts at capture, and re-check anything older than a quarter. A flat-priced tool makes this affordable to do regularly instead of dreading the cost.

See how clean your list really isFree preview of your first 100 contacts — no credit card.
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