B
Evidence Grade B
Graded
under review
Safe to Cite
Current
4%
4% -- selling cost increase from rep attrition for sales organizations (2026)
Attribution:
View source
Lighthouse Research Team
Last verified:
·
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Source verified
Evidence graded
Value
4%
Unit
Percentage
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
20
Independence
30
Methodology
45
Freshness
95
Source
Forbes
Primary
Tier C
https://www.sales30conf.com/blog/sales-training-roi-how-to-maximize-revenue-engagement-and-results/ ↗
Source Article
Sales Training ROI: How to Maximize Revenue, Engagement, and Results
You have no sales process. Your sellers aren’t hunting, they’re complacent. Your company has just acquired another or been gobbled up by private equity. Customer budgets are tight and your team isn’t making quota.
These are just a few reasons sales organizations invest in training. Selling can be ch…
Original Research
Forbes
· Original study ↗
Methodology
Range 4-6% selling cost increase per 5% attrition increase; attributed to Forbes
Methodology documented
Segmentation
Industryhr
Cite this stat
Plain Text
sales organizations: 4% selling cost increase from rep attrition. Source: Forbes (2026). Via Lighthouse Intelligence -- https://lighthousedata.io/data/rep-attrition-5pct-raises-selling-costs-4-6
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<blockquote cite="https://lighthousedata.io/data/rep-attrition-5pct-raises-selling-costs-4-6" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>4%</strong> -- selling cost increase from rep attrition for sales organizations<br><small>Source: Forbes (2026) · <a href="https://lighthousedata.io/data/rep-attrition-5pct-raises-selling-costs-4-6" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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