Data decay is the rate at which your customer and prospect records become outdated. People change jobs, companies close or get acquired, email addresses get deactivated, and phone numbers change. The average B2B database decays at roughly 30% per year, meaning nearly a third of your contacts become unreachable annually.
Why It Matters
Decayed data kills campaigns. Emails bounce. Calls go to the wrong person. Your sales team wastes time chasing dead leads. Even worse, high bounce rates damage your sender reputation, which hurts deliverability for everyone in your domain. Data decay isn't a minor inconvenience — it directly costs you revenue.
How It Happens
- Job changes: Professionals switch roles every 3-4 years on average, invalidating their work email and title
- Company changes: Businesses close, merge, rebrand, or restructure, making company-level data obsolete
- Contact updates: Phone numbers get reassigned, email addresses get deactivated after someone leaves
- Role changes: Promotions and internal moves change decision-making authority and contact information
- Technology changes: Companies migrate CRMs, change domains, or adopt new communication tools
Example
You built a database of 10,000 contacts in 2023. By early 2024, 3,000 of those contacts have changed jobs or companies. By 2025, another 3,000 decay. If you don't clean and re-enrich, more than half your database is worthless within two years.