Where the 95:5 rule actually comes from
The claim is everywhere: only 5% of your buyers are in market at any time, so 95% of your audience cannot buy from you today.
The derivation is simpler than most citations suggest. If the average B2B purchase cycle is around five years, then roughly 20% of the market is in market in any given year. With a sales cycle of around 90 days, that resolves to approximately 5% in any given quarter.
It is arithmetic from assumptions, not a measured study. John Dawes, who published it with the LinkedIn B2B Institute, states plainly that the 95% figure is not meant to be a precise rule.
There is also direct counter-evidence. NetLine analysed more than 24,000 individual responses and over 72,000 first-party buyer-intent records, finding that around 30.8% of B2B professionals were looking to move within twelve months, with roughly 7.6% ready to decide within the quarter and another 7.6% within three to six months. That points to something nearer 15% actively approaching a decision. NetLine sells buyer-intent data, which is worth naming, and their sample is people who downloaded content — a group more likely to be in market than the general population.
So the honest position: the exact figure is unknown, category-dependent, and calculable from your own purchase frequency. Reported ranges run roughly from 98/2 to 93/7.
The structural point survives all of it. The large majority of the people you reach cannot buy from you now, and you cannot make them. Buyers move themselves in-market when a need arises. That is the finding, and it does not depend on the number being 5.
Which changes what advertising is for
If most of the audience cannot act, persuasion is the wrong objective for most of the budget.
The job becomes memory. Being the brand that comes to mind when the need eventually arrives — which is what mental availability means, and it is measurable rather than a metaphor.
Jenni Romaniuk's framing is the useful one: you cannot push buyers through a funnel, but you can catch them as they fall.
Category entry points
Mental availability is measured through category entry points — the situations, needs, and cues that lead someone into buying in a category.
Not demographics. Not attitudes. Situations.
For coffee: needing to wake up, wanting something warm, meeting someone, getting through an afternoon, having something to offer a guest. For accounting software: hiring the first employee, year-end approaching, outgrowing spreadsheets, a bookkeeper leaving.
Romaniuk's method for surfacing them works through a set of questions about the buying occasion — when, where, why, with whom, with what, while doing what, and how the buyer was feeling. Each answer is a potential entry point, and each is a separate route into memory.
The strategic implication is a reframe. A brand does not compete for a segment of people. It competes for a share of buying situations. Growth comes from being linked to more of them, among more people.
What mental availability actually looks like
This is where the realism arrives, and it is rarely quoted.
Dawes describes getting to double-digit mental availability as a multi-year task. Many well-established brands are linked to a category entry point by no more than 20 to 30% of respondents. Even market leaders often reach only around 50%.
Read that against the typical brand plan, which assumes the audience knows who you are and needs only to be persuaded. For most brands, the majority of category buyers do not connect them to any buying situation at all.
Two consequences.
The ceiling on short-term tactics is low. If seven in ten category buyers do not think of you when the need arises, no amount of conversion optimisation reaches them.
Progress is slow and worth measuring anyway. Mental availability moves over years, not quarters. A brand that does not measure it cannot tell whether its brand investment is working, which is precisely why brand budgets are vulnerable to the next efficiency review.
How to build the links
Identify the entry points. Research the buying occasions in your category, using the situational questions rather than demographic ones. Most categories have somewhere between five and fifteen that matter.
Assess your position on each. Which entry points are you already linked to, by how many buyers, and which are unclaimed. Established competitors usually own the obvious ones.
Prioritise by size and openness. A large entry point already owned by a leader is expensive. A moderate one nobody has claimed is often the better target.
Attach consistently. The link is built by repeatedly presenting the brand alongside the situation. Consistency is the mechanism, and it is why rebuilding the campaign annually is so costly — it discards the accumulation.
Use distinctive assets to make the link stick. Recognition is what converts exposure into an association attributed to you rather than to the category or a competitor.
Where this goes wrong
Entry points are written as demographics. "Young urban professionals" is not a buying situation. If it does not describe a moment, it is not an entry point.
One entry point is claimed and defended forever. Growth comes from breadth. A brand linked to a single situation has capped itself at that situation's size.
They are invented internally. Entry points come from research into how buyers actually experience the need. Generated in a workshop, they describe how the company thinks about its product.
Measurement is skipped. Mental availability is measurable through survey work linking brands to entry points. Without it, brand investment cannot be defended and gets cut.
The concept is used to justify anything. Not all spending builds mental availability. Work that is unrecognisable, inconsistent, or reaches too few people does not, and calling it brand building does not change that.
A note on how this relates to customer jobs
Category entry points and jobs to be done describe overlapping territory from different traditions, and it is worth being precise.
Jobs to be done asks what the customer is trying to accomplish, and is used to decide what to build.
Category entry points asks which situations trigger category buying, and is used to decide what to attach the brand to in memory.
The same underlying situation often appears in both. The difference is what each is for. One informs the product; the other informs the memory structure.
Diagnostic: is mental availability being built?
Six tests.
Category entry points have been identified from buyer research, and they describe situations rather than people.
The brand's link strength to each has been measured, not assumed.
More than one entry point is being targeted.
Distinctive assets are used consistently enough that exposure is attributed correctly.
Brand measurement runs on a multi-year horizon, and someone owns the trend.
The proportion of category buyers who link the brand to any entry point is known.
Test six is the number that reframes the plan. If it sits at 20%, the priority is not persuading the people who know you.
What this produces
A growth objective that can be worked on before anyone is ready to buy.
That is the practical value. Without it, marketing splits into demand capture, which is measurable and capped by how many people are in market, and everything else, which is unmeasurable and therefore permanently at risk in a budget review.
Category entry points make the second half concrete. What are the situations, which do we own, how strongly, and is that improving. Those questions have answers, and the answers move slowly and legibly.
The brand that gets remembered is the brand that gets bought. Everything else is a bet on catching people in the small window when they were going to buy anyway.
Frequently asked questions
Is the 95:5 rule accurate?
It is a rough approximation derived from average purchase-cycle arithmetic, and Dawes states it is not meant to be a precise rule. Intent-data research suggests a higher in-market share in some categories. Reported ranges run roughly from 98/2 to 93/7, and the figure is calculable from your own purchase frequency.
What is a category entry point?
A situation, need, or cue that leads someone into buying in a category — described as a moment rather than a person. Mental availability is measured through how strongly a brand is linked to these situations.
What is mental availability?
The probability that a brand comes to mind in a buying situation. It is measured through survey work linking brands to category entry points, not through unprompted awareness alone.
How strong is mental availability for a typical brand?
Lower than most plans assume. Many well-established brands are linked to an entry point by only 20 to 30% of respondents, and even market leaders often reach around 50%. Building it is a multi-year task.
How is this different from jobs to be done?
They describe overlapping situations for different purposes. Jobs to be done informs what to build. Category entry points inform what to attach the brand to in memory. The same situation can appear in both.
How many entry points should a brand target?
More than one, and usually several. Most categories have between five and fifteen that matter. A brand linked to a single situation has capped its growth at that situation's size.
Can performance marketing build mental availability?
Only incidentally. Performance tactics reach people already searching, which is the small in-market group by definition. The people who are not in market do not see them, which is the structural limit on that spend.
Sources
Dawes, J., The 95:5 Rule, with the LinkedIn B2B Institute, including the author's own note on its imprecision
Romaniuk, J. and Sharp, B., How Brands Grow Part 2, on category entry points and mental availability measurement
Romaniuk, J., Building Distinctive Brand Assets
NetLine, buyer-intent analysis across 24,000-plus responses and 72,000-plus first-party intent records — a vendor of intent data, sampling content downloaders
Structure your next phase
Zerologic identifies the buying situations a category actually runs on, and builds the campaign systems that attach a brand to them consistently.
Talk to us: partners@zerologic.io · zerologic.io
