B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Current
500 hours
500 hours -- hours lost to bad prospect data for Sales reps (2026)
Sales reps lose an estimated 500 hours per year chasing bad prospect data.
- Vendor estimate
Attribution:
View source
Lighthouse Research Team
Last verified:
·
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Source verified
Evidence graded
Value
500 hours
Unit
Duration Hours
Data Vintage
2026
Entity
Evidence Quality
B
Strong, reliable evidence
Sourced from a well-regarded research firm or industry leader with transparent methodology and a reasonably large sample.
Single source - not yet corroborated
Score breakdown
Extraction
50
Source Trust
60
Citation Chain
60
Independence
30
Methodology
35
Freshness
95
Source
Apollo
Primary
Tier C
https://www.apollo.io/insights/why-is-b2b-contact-data-accuracy-so-important-for-outbound-sales-perf… ↗
Source Article
3 Signs Outbound Reps Waste Time on Stale Data (2026)
Disclosure: This article is published by Datamagnet. Vendor claims are self-reported unless otherwise noted.
Stale Contact Data: 3 Signs It's Wasting Sales Time
By Elena Cho, Sales Intelligence Lead at Datamagnet, 8+ years building outbound data workflows for B2B revenue teams. Reviewed by the Datam…
Original Research
Apollo
· Original study ↗
Methodology
Apollo estimate
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
Sales reps: 500 hours hours lost to bad prospect data. Source: Apollo (2026). Via Lighthouse Intelligence -- https://lighthousedata.io/data/reps-lost-hours-bad-data-2026
HTML Embed
<blockquote cite="https://lighthousedata.io/data/reps-lost-hours-bad-data-2026" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>500 hours</strong> -- hours lost to bad prospect data for Sales reps<br><small>Source: Apollo (2026) · <a href="https://lighthousedata.io/data/reps-lost-hours-bad-data-2026" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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