B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Current
86%
86% -- ab test failure rate for A/B testing industry (2026)
A/B tests have an 86% failure rate, with only 1 in 7 reaching statistical significance.
Attribution:
View source
Lighthouse Research Team
Last verified:
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Source verified
Evidence graded
Value
86%
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
kirro.io
Primary
Tier C
https://kirro.io/testing-methodology ↗
Source Article
A/B testing methods: pick the right one | Kirro
Only 1 in 7 A/B tests reach statistical significance. That’s an 86% failure rate. And yet 58% of companies have no framework for deciding what or how to test.
Those two stats are connected. Bad methodology is why most tests fail. Not bad ideas.
This section covers the science behind reliable testing…
Original Research
kirro.io
· Original study ↗
Methodology
Derived by author from 1-in-7 significance rate
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
A/B testing industry: 86% ab test failure rate. Source: kirro.io (2026). Via Lighthouse Intelligence -- https://lighthousedata.io/data/ab-test-failure-rate-86
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<blockquote cite="https://lighthousedata.io/data/ab-test-failure-rate-86" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>86%</strong> -- ab test failure rate for A/B testing industry<br><small>Source: kirro.io (2026) · <a href="https://lighthousedata.io/data/ab-test-failure-rate-86" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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