---
title: The 95-5 Rule — definition | RGM® Glossary
url: https://realgrowthmatters.com/glossary/95-5-rule/
updated: 2026-06-10
source_html: https://realgrowthmatters.com/glossary/95-5-rule/
---

# The 95-5 Rule

nine·ty-five five rule/ðə 95 5 ɹul/noun

Your ads mostly reach people who aren't buying — the rule says that's the point, not the problem.

Term
:   The 95-5 Rule

Origin
:   John Dawes, Ehrenberg-Bass (2021)

Popularized by
:   LinkedIn's B2B Institute

Domain
:   B2B especially; logic generalizes

## Forms & parts of speech

95-5 · shorthand

The out-market reality.

"Remember **95-5** — the campaign's job is being remembered later, not clicked today."

## Definition in plain terms

The 95-5 rule holds that at any given moment, only about 5% of a category's potential buyers are actively in-market; the other ~95% are out-of-market and will buy in a later quarter or year. The number is an illustrative average, not a constant — its author calls it directionally true (corporate buyers of many services change suppliers roughly every five years, putting ~5% in-market in a given year) — but the strategic weight doesn't depend on the decimals.

## The mechanics

The implication inverts performance-era instinct: since most of the audience cannot respond now, advertising's main job is building MEMORY — brand links to category entry points — that activates when buyers eventually enter the market. That argues for reach over hyper-targeting 'in-market' segments (which are small, expensive, and already contested), creative built for remembering rather than clicking, and patience in measurement: the 95% can't show up in this quarter's attribution window by definition.

## When it matters

It matters most in B2B and considered purchases, where in-market windows are rare and short — and where lead-gen-only strategies compete savagely for the 5% while a rival quietly pre-builds preference with the 95%. It pairs with the 60/40 rule (the budget translation of the same physics) and mental availability (the mechanism). The honest caveat: it's an argument for brand investment, made by institutes whose research program favors brand investment — the supporting evidence (ESOV effects, the IPA databank) is the part to cite.

**Worked example.** A cybersecurity vendor spends everything on 'in-market' intent data and bottom-funnel search, and growth plateaus — the 5% pool is finite and every rival bids on it. The 95-5 rebalance holds the capture spend but adds always-on category reach (the situations CISOs face, attached to the brand, memorably). Eighteen months later, win rates rise where deals start — buyers entering the market already shortlist the brand. The expensive 5% auction didn't change; the brand stopped arriving to it as a stranger.

**Failure modes to watch.** Quoting 95-5 to abandon capture marketing entirely (the 5% still buys NOW); treating the illustrative number as measured law; and building reach campaigns nobody remembers — out-market reach only pays if it builds memory.

## Synonyms & antonyms

### Synonyms

the 95-5 ruleninety-five five

### Antonyms

in-market targeting onlybottom-funnel-only strategy

## Origin & history

Coined by Professor John Dawes of the Ehrenberg-Bass Institute in a 2021 paper for LinkedIn's B2B Institute, "Advertising effectiveness and the 95-5 rule: most B2B buyers are not in the market right now" — the institute's penetration research compressed into one teachable ratio.

Etymology: [source](https://business.linkedin.com/marketing-solutions/b2b-institute/the-95-5-rule).

## Usage trends

Search interest for this term over the last five years:

[View interest-over-time on Google Trends →](https://trends.google.com/trends/explore?q=95%205%20rule&date=today%205-y)

## Common questions

What is the 95-5 rule?
:   The finding that roughly 95% of category buyers are out-of-market at any moment — advertising mostly reaches future buyers.

Where does the 95-5 rule come from?
:   Professor John Dawes of the Ehrenberg-Bass Institute, published through LinkedIn's B2B Institute in 2021.

What does it change in practice?
:   It shifts weight toward broad reach and memorable brand creative — building memory the 95% retrieve when they enter the market.

## Related tools & calculators

- tool[Funnel drop-off analyzer](/tools/funnel-drop-off-analyzer/)

## Resources & people to follow

- referenceLinkedIn B2B Institute — "Advertising effectiveness and the 95-5 rule" (Dawes)
- referenceEhrenberg-Bass Institute
- book*The Long and the Short of It* — Binet & Field

Curated, non-competitor resources verified per term.

## Related training

- module[Marketing analytics](/training/marketing-analytics/)

## Disciplines

Areas of marketing where the 95-5 rule is a core concern:

[Measurement](/training/marketing-analytics/)[Growth strategy](/training/growth-marketing-foundations/)

## Read next

## Related terms

[Mental availability](/glossary/mental-availability/)[The 60-40 rule](/glossary/60-40-rule/)[How Brands Grow](/glossary/how-brands-grow/)[Byron Sharp](/glossary/byron-sharp/)[Jenni Romaniuk](/glossary/jenni-romaniuk/)

## Sources

1. trends[Google Trends — "95 5 rule"](https://trends.google.com/trends/explore?q=95%205%20rule&date=today%205-y)