The 95:5 Rule and B2B Buying Groups: Why Brand Still Wins Deals

A typical B2B purchase is no longer a conversation between one buyer and one salesperson. Forrester's 2026 buyer research found that the average buying decision involves 13 internal stakeholders and nine external influencers ¹. Gartner, surveying buyers in late 2025, found that 67% prefer a buying experience with no sales rep at all ².

That raises a hard question: if a large group researches on its own, long before anyone fills in a form, how does a brand reach the shortlist? The 95:5 rule, developed by the LinkedIn B2B Institute with Professor John Dawes of the Ehrenberg-Bass Institute, offers a large part of the answer ³.

What the 95:5 rule says

In a 2021 Marketing Week column, Peter Weinberg and Jon Lombardo of the B2B Institute set out the rule: only about 5% of B2B buyers are in the market at any given time, while the other 95% will not buy for months or years ³. The idea came from research by Dawes carried out with the two authors ³.

Their example is business banking. If 80% of companies switch business banks once every five years, then roughly 20% are in the market over the next year, about 2% over the next month and about 1% over the next two weeks ³. Yet the same article notes that 95% of B2B marketers expect significant sales within two weeks of a campaign ³.

The authors draw three conclusions ³:

• Objectives: there is "a low ceiling on your short-term sales potential", so targets should reflect that.
• Creative: advertising aimed at the 95% should be memorable rather than built only around buy-now calls to action.
• Distribution: reach the whole category, not only in-market buyers, and spread budgets over long periods.

Marketers cannot push out-of-market buyers into the market; buyers enter when their needs change. Marketing's job is to raise the odds that the brand comes to mind when they do, because, as Dawes puts it, "people largely use their memories when buying, rather than searching" ³.

Buying groups are bigger and more self-directed

Recent research makes the 95:5 rule more pressing, not less. Forrester's State of Business Buying 2026, based on its survey of nearly 18,000 business buyers worldwide, reports that buying groups for purchases with generative AI features are roughly double the size, at 14 members against seven for purchases without them ⁴. Procurement acts as a decision-maker in 53% of buying cycles, and 94% of buyers say they use AI during their buying process ⁴.

Gartner's figures show how much of that work happens without suppliers present. In its March 2026 release, based on 646 buyers surveyed in August and September 2025, 67% preferred a rep-free experience and 45% reported using AI during a recent purchase ². A further Gartner release in May 2026 found buyers used an average of seven information sources in a recent purchase, and 70% preferred a fully digital, self-service buying experience ⁵. The same research found that 69% of buyers want to check AI-generated insights with a sales rep ⁵, so sellers still matter, but later and in a different role.

Finding	Figure	Source
Internal stakeholders in a typical decision	13	Forrester 2026 1
External influencers in a typical decision	9	Forrester 2026 1
Buyers preferring a rep-free experience	67%	Gartner 2026 2
Buyers preferring fully digital self-service	70%	Gartner 2026 5
Average information sources per purchase	7	Gartner 2026 5
Buyers avoiding suppliers with irrelevant outreach	73%	Gartner 2025 6

That last figure comes from Gartner's 2025 survey of 632 buyers, which also found that 69% saw inconsistencies between a supplier's website and what its sellers told them ⁶. Badly targeted outreach can remove a brand from consideration, and every digital touchpoint is part of the sales conversation.

Why mental availability decides the shortlist

If most of the buying group researches alone, often starting with search or AI tools, the brands they look up first are the ones already in their heads. The Ehrenberg-Bass Institute calls this mental availability, defined as "being easily thought of in buying situations" ⁷.

In a 2022 paper for the B2B Institute, Professor Jenni Romaniuk explained that mental availability is built around category entry points (CEPs): "the cues that category buyers use to access their memories when faced with a buying situation" ⁷. These can be needs, triggers or circumstances, such as a funding round, a compliance deadline or a failing legacy system. In her business insurance research, each additional CEP linked to a brand lowered a customer's probability of defection by about 5% ⁷.

Search behaviour reinforces the point. LinkedIn B2B Institute research published in December 2025 cited Dreamdata analysis showing branded search returned $12.99 for every dollar invested, against $0.68 for non-branded search ⁸. The same work noted that only 46% of B2B telecoms searches included a brand name, compared with 87% in B2C telecoms, and cited Google and Bain research suggesting most buyers keep a shortlist of about three brands formed on day one of the purchase journey ⁸.

Balancing brand and demand budgets

None of this means abandoning lead generation. The 5% who are in market today still need to be converted. The question is proportion.

The most widely quoted guidance comes from Les Binet and Peter Field's report for the B2B Institute, The 5 Principles of Growth in B2B Marketing ⁹. In 2019 LinkedIn summarised its finding that B2B businesses grow best when they put "46% of budget to brand-building activity and 54% to activation marketing" ¹⁰. The report also found that share of voice correlates with share of market, with 10% extra share of voice (ESOV) growing market share by 0.7% in B2B ¹⁰.

The five principles themselves are ⁹:

1. Invest in share of voice.
2. Balance brand and activation.
3. Expand your customer base.
4. Maximise mental availability.
5. Harness the power of emotion.

Two practical points follow. First, 46:54 is a starting benchmark, not a fixed law; category, growth stage and sales cycle length all affect the right mix. Second, "brand" spending should still be accountable. LinkedIn's 2025 research argues that paid placements are "a short-term lease" on visibility, and that their value increases significantly when paired with strong, distinctive branding ⁸. Spend on reach works best when the creative is clearly identifiable as yours.

What to measure

Short-term revenue alone will undervalue brand work, because most of the market is not ready to buy when a campaign runs. In a discussion summarised by Dreamdata, Dawes recommends monitoring unaided brand recall, category entry points and distinctive brand assets, plus the percentage of total potential buyers reached over time ¹¹.

Romaniuk's paper adds three specific mental availability metrics ⁷:

• Mental market share: the brand's share of all CEP-brand links in the category.
• Mental penetration: the share of category buyers who link the brand to at least one CEP.
• Network size: the average number of CEPs linked to the brand among those buyers.

Pair these with demand metrics such as pipeline, win rate and branded search volume, reviewed over quarters and years rather than campaign weeks. Given Forrester's buying group figures ¹, it is also worth tracking reach across the full group, including finance, procurement and IT, not only the job titles that fill in forms.

Key takeaways

• The 95:5 rule holds that only about 5% of B2B buyers are in market at any time ³.
• Forrester puts the typical buying decision at 13 internal stakeholders and nine external influencers ¹.
• Gartner research published in 2026 found 67% of buyers prefer a rep-free experience and 70% prefer fully digital self-service ²⁵.
• Binet and Field's B2B guidance suggests a 46:54 brand-to-activation split as a starting point ¹⁰.
• Measure mental availability through CEPs, recall and reach alongside pipeline ⁷¹¹.

What this means for your brand

Map the category entry points that trigger purchases in your market and make sure your content and advertising link your brand to them. Plan reach across the whole buying group, not just likely leads, and keep it running between campaigns. Use the 46:54 split as a sense check on your current budget rather than a target to hit exactly. Make your website and sales messaging consistent, since buyers notice the gaps. And add at least one brand health measure, such as unaided recall or mental market share, to the dashboard leadership already reviews.

Sources

1. Forrester's 2026 Buyer Insights: GenAI Is Upending B2B Buying As Leaders Face Mounting Pressure To Justify Every Dollar Spent - Forrester, January 2026
2. Gartner Sales Survey Finds 67% of B2B Buyers Prefer a Rep-Free Experience - Gartner, March 2026
3. The 95:5 rule is the new 60:40 rule - Marketing Week, September 2021
4. The State Of Business Buying, 2026 - Forrester, January 2026
5. Gartner Survey Finds 69% of B2B Buyers Turn to Sales Reps to Validate AI-Generated Insights - Gartner, May 2026
6. Gartner Sales Survey Finds 61% of B2B Buyers Prefer a Rep-Free Buying Experience - Gartner, June 2025
7. Category Entry Points In A B2B World: Linking Buying Situations To Brand Sales - The B2B Institute at LinkedIn, June 2022
8. Why LinkedIn says building "owned prominence" beats rented ads in B2B marketing - PPC Land, December 2025
9. Five Principles of Growth in B2B Marketing - IPA, updated March 2025
10. How B2B marketing really drives growth - LinkedIn Marketing Solutions, October 2019
11. The 95:5 Rule: Why B2B Growth Starts Long Before the Purchase - Dreamdata, accessed October 2026

Figures and product details are as reported by the sources listed, at the time of writing. Platforms change quickly, so check the latest documentation before acting on any single number.