The 95-5 rule says that at any one time, up to 95% of business buyers are not in the market for what you sell. It gets quoted as a fixed law, but the researcher who wrote it called it a heuristic, meaning a rough guide rather than a measurement, and he showed how to work out the number for your own category.
My position is simple: stop repeating the 5% and work out your own figure. Once you know what share of your buyers can realistically buy this quarter, you know how much of your website should be aimed at the ones who cannot.
Key Takeaways
- The 95-5 rule holds that at any one time, up to 95% of business buyers are not in the market for what you sell, so lead generation alone only ever reaches the small share who are.
- The Ehrenberg-Bass Institute published it with the words “up to” in its May 2021 B2B report, and those two words get dropped in most places the rule is repeated, including Google’s own AI Overview.
- The 5% is a figure for a single quarter, and John Dawes got it by assuming a five-year switching cycle. It is not a constant that applies to every category.
- You can calculate your own share: divide 100 by your category’s replacement cycle in years for the annual figure, then divide that by four for the quarter.
- Published in-market figures disagree because each one measures a different thing over a different window; Forrester reports about 15.6% a year for marketing technology, 6Sense reports about 40% at a point in time under a much wider definition.
- A keyword tool can only count people who are searching, so thin B2B search volume is usually the tool counting the in-market slice correctly, not the tool being broken.
- Pages aimed at the out-of-market majority need distribution and a reason to be remembered, because those buyers will not go looking for them.
What does the 95-5 rule actually say?
The 95-5 rule says that at any given moment, up to 95% of the businesses that could buy from you are not in the market for your product or service, and only the remaining slice, roughly 5%, is actively looking to buy. It comes out of B2B research at the Ehrenberg-Bass Institute, and you will see it written as the 95-5 rule, the 95/5 rule and the 95:5 rule, all meaning the same thing.
The split itself is the part everyone agrees on, and it is worth stating in plain terms before we argue about the number:
- The in-market 5%. Buyers with a live need, a budget and a decision to make. These are the people who compare vendors, read pricing pages and fill in demo forms, and they are the only ones your bottom-funnel pages can convert this quarter.
- The out-of-market 95%. Buyers with no immediate need, who are perfectly happy with their current supplier or have not thought about the category at all. They are next year’s revenue rather than lost revenue, and the only thing you can do for them today is make sure they know who you are before that day arrives.
That second half is why brand building sits next to demand capture in almost every discussion of this rule. Marketers call it mental availability, which just means being the company a buyer thinks of first when the need turns up, and category entry points, which are the situations that trigger that thought.
The Ehrenberg-Bass Institute presents the 95:5 rule as the successor to the 60:40 rule from Les Binet and Peter Field, the older advice to put about 60% of a budget into brand building and 40% into short-term response.
Here is the exact wording, from the institute’s own publication: “It might surprise you to learn that up to 95% of business clients are not in the market for many goods and services at any one time.” Notice the words “up to”. Almost nobody repeats them, and the rest of this article is about what that costs you.
Where does the 95/5 rule come from?
It comes from a May 2021 B2B report by John Dawes
John DawesProfessor and Associate Director, Ehrenberg-Bass InstituteMarketing researcher at the Ehrenberg-Bass Institute who wrote the 2021 B2B report that introduced the 95-5 rule.johndawes.infoEhrenberg-Bass Institute at the Ehrenberg-Bass Institute, titled “Advertising effectiveness and the 95-5 rule: most B2B buyers are not in the market right now”. Dawes wrote it for LinkedIn that year and it was co-published in Marketing Week, which is how it reached the wider marketing world.
Almost nobody met the 95-5 rule through that report, though. They met it through LinkedIn’s B2B Institute, which has promoted it hard since 2021, and a company that sells advertising has its own reasons to state the number as boldly as it can.
One correction worth making while we are on origins. 6Sense, which ranks on page one for this term, writes that the rule “was derived from B2C contexts and maps poorly to the long, complex purchase cycles of B2B”. You can see where that reading comes from, because Ehrenberg-Bass is best known for consumer-goods research and WARC has argued that the 95:5 pattern is not exclusively a B2B thing.
But the specific document is labeled “B2B Report May 2021” by the institute, its title says B2B buyers, and its 5% is worked out from corporations changing their principal bank or law firm. So the institute’s wider reputation is a consumer one. The report that defines this rule is not.
Is the 5% figure a constant?
No. The 5% is a quarterly figure that John Dawes got by assuming one specific cycle length, and he said so plainly in the same piece that gave us the rule: “The 95% figure is not meant to be a precise rule. We’re using it as a heuristic to get the idea across that the vast majority of businesses, for a large proportion of products, are not in the market in particular time periods.”
Two things go missing when the rule gets passed along. First, the words “up to” get dropped. Dawes and Ehrenberg-Bass both wrote them, and LinkedIn’s B2B Institute states the rule as “the 95-5 rule, which shows that 95% of your potential buyers aren’t ready to buy today”.
Second, and this is the one that costs you money, the time period gets dropped. Dawes’ 5% is what is left in a single quarter, once you assume a five-year switching cycle. Over a full year, that same cycle gives you 20%, which is a very different planning number.
You can watch both words disappear in Google’s own summary. Its highlighted extract on “95-5 rule” reads “at any given time, only about 5% of potential customers are actively in-market to buy, while 95% are out-of-market”, credited to Ehrenberg-Bass. No “up to”, no quarter, and no cycle length.
To be clear about what I am correcting here: I am not saying the 95-5 rule is wrong or that it is a myth. The pattern holds and the point behind it is sound. What is wrong is treating 5% as a number you can lift and apply to your own business without checking it.
How do you calculate your own in-market share?
Take your category’s average replacement or renewal cycle in years, divide 100 by it to get the percentage of buyers who are in the market across a full year, then divide that by four for a single quarter. That is the whole method, and it is Dawes’ own, not something anyone has invented on top of him.
Working out your own in-market share
- Find your category’s average replacement or renewal cycle, in years. If you sell an annual contract, it is your renewal period; if you sell equipment, it is how long the last one lasted.
- Divide 100 by that number of years. That is the share of your addressable buyers who come into the market at some point across a full year.
- Divide that annual figure by four for a quarterly view, which is closer to the window a campaign or a landing page actually works in.
- Compare it against 5%. If your cycle is shorter than five years, the standard number is understating your opportunity; if it is longer, it is overstating it.
Here is Dawes doing it himself, in his own words: “If you know the average interpurchase time for your category you can readily calculate the proportion of potential buyers who are in-market. Suppose a category has an average interpurchase time of two years. That means 50% are in the market over the course of a (whole) year, or around 13% in any quarter.”
And here is where the famous 5% comes from: “Corporations change service providers such as their principal bank or law firm around once every five years on average. That means only 20% of business buyers are ‘in the market’ over the course of an entire year; something like 5% in a quarter.”
| Replacement cycle | In-market over a year | In-market in a quarter | Where the cycle figure comes from |
|---|---|---|---|
| 2 years | 50% | about 13% | Dawes’ own worked example |
| 4 years (computers) | 25% | about 6% | LinkedIn and Ehrenberg-Bass report this cycle for 75% of companies; both percentages here are my arithmetic applied to it |
| 5 years (banking services) | 20% | about 5% | Dawes’ own worked example, and the source of the familiar 5% |
| 10 years | 10% | about 2.5% | My arithmetic, shown so you can see what a long cycle does to the number |
The sourced cycle lengths are worth having, because most people do not know their own. LinkedIn’s B2B Institute, quoting joint “How B2B Brands Grow” research with Ehrenberg-Bass, reports that 75% of companies buy computers once every 4 years and 80% of companies change banking services once every 5 years.
Two honest caveats on the arithmetic. It assumes buyers come into the market evenly across the year, which they rarely do if your category has a budget season. It also assumes the decision itself is shorter than a quarter, which is not true of every enterprise purchase.
So treat the result as a ceiling rather than a forecast. If you do not know your cycle length at all, Dawes’ own fallback is the obvious one: “If that sort of information is not at your fingertips, a straightforward survey can yield the information.” Ask a couple of dozen existing customers how long they had their previous supplier, and you will have a usable figure by the end of the week.
If you have sized a market before committing to it, this will feel familiar. It is the same instinct I walked through for stores in how to validate an eCommerce niche.
Why do published in-market numbers disagree so much?
Because each published figure measures a different thing over a different window, and almost nobody says so when they quote one. Once you line them up with their definitions attached, the disagreement mostly disappears.
| Source | Figure | What it measures | Window |
|---|---|---|---|
| Dawes / Ehrenberg-Bass | about 5% | Buyers in the market, from a five-year switching cycle | A quarter |
| Dawes / Ehrenberg-Bass | about 20% | The same buyers, the same cycle | A year |
| Forrester, marketing technology only | about 15.6% | Organizations planning to change their primary provider | A year |
| 6Sense, 594 companies, most of them technology firms | about 40% | Accounts showing any of the buying signals 6Sense tracks, which is a much wider definition of in-market | A point in time |
| 6Sense, same study | 2.3% | Accounts in immediate buying mode | A point in time |
Look at the Forrester row against the two Dawes rows for a moment. Forrester published “The 95-5 Rule Is Not A Rule, But It’s Not A Myth Either” in May 2025 and argues that 5% is too low, reporting a figure it labels as in market each year.
On the annual window, though, Dawes’ own number for a five-year cycle is 20%, which sits above Forrester’s 15.6% for marketing technology. I am not claiming Forrester is wrong; its data is its own and covers categories the rule was never fitted to. I am saying the two figures are closer than the headline suggests once you put them on the same clock.
6Sense is the more interesting case, because it corrects the rule upward to about 40% and then reports its own strict figure at 2.3%, below the 5% it is correcting. To its credit, it explains exactly why: as 6Sense puts it, “at the heart of the disconnect is the term ‘in-market'”.
Why does your B2B keyword tool show so little volume?
Because a keyword tool can only count people who are typing something into a search box. If only the in-market slice searches your category, then the tool is counting that slice correctly; it was never counting your whole market in the first place.
So a couple of dozen searches a month on a term your whole business depends on is usually a fact about timing, not a fault in the tool.
This is the part of Dawes’ piece that our industry has never really picked up, and it is a claim about search made by a researcher the search industry only ever quotes second-hand. His words:
The trouble with this tactic is that people largely use their memories when buying, rather than searching. And when they do search they strongly prefer brands they’re familiar with. Familiarity is built over time, with consistent messaging.
I want to be careful with the second half of that, because it is the half people quote hardest. Dawes follows it with a line about click-through rates being lower for unfamiliar brands, and the reference under that line is Dahlen 2001, “Banner advertisements through a new lens”, published in the Journal of Advertising Research.
That is a banner advertising study from 2001, so it tells you nothing reliable about organic search click-through in 2026. The memory-versus-search point stands on its own reasoning and on his other citations, but I would not lean on that click-through line.
Google’s own summary reaches the same place. Under “For the 5% (Demand Capture)” it tells you to optimize high-intent search terms, clear pricing pages and easy demo requests, which puts search squarely in the small group rather than the large one.
If that is where you are right now, staring at a keyword tool returning almost nothing, I wrote the runnable version of this problem separately: a B2B SEO audit for low-volume keywords. That post is the checklist; this one explains why the volume is low to begin with.
What should you publish once you know your number?
Split your page plan in two and judge the halves differently. One half is the pages the in-market slice searches for, which a keyword tool can size and which you hold to ranking and conversion targets. The other half is for buyers who will never search for you, and those pages need a distribution plan rather than a keyword.
In practice that means three decisions, and each one changes what you measure:
- Build the in-market pages properly and stop expanding them. Your pricing page, your comparison pages, your integration and use-case pages, your demo request. These serve the people your calculated share says are actually shopping this quarter, so give them the searchable commercial terms and judge them on conversions.
- Size that half against your own number, not against 5%. If your cycle is ten years, about 2.5% of your addressable buyers are in the market this quarter, and no amount of extra bottom-funnel pages will move that ceiling. As Dawes puts it, you need realistic expectations of what any single campaign can do.
- Give the other half a distribution plan, not a keyword. The out-of-market 95% are not searching, so a well-optimized page waiting for them does nothing. Push that material to where they already are: your newsletter, LinkedIn, a podcast, a partner’s audience, an event. Judge it on reach, on your branded search volume in Search Console, and on how often a new enquiry says they have been reading you for a while. Give it years, not quarters.
There is one more reason to say B2B out loud on every page you write about this, and it is a small thing with a real cost. The phrase is shared with several unrelated subjects.
Half the related searches on that term belong to a restaurant book, a diet and a food usage. If your page does not say B2B in its title and its opening line, you are asking Google to work out which 95-5 rule you mean, and there are at least three other meanings in play.
So, is the 95-5 rule worth planning around?
Yes, as long as you run it as a calculation instead of quoting it as a statistic. The idea underneath it is one of the more useful things in B2B marketing, because it explains why a page can be technically perfect and still convert almost nobody in a given quarter.
Where I part company with the way it usually gets used is the 5% itself. Dawes gave that number a cycle, a window and the words “up to”, and all three of them usually disappear before it reaches anyone’s slide.
So do the division. Five minutes with your renewal data gives you a figure that is actually yours, and that figure is a far better argument for a content budget than any borrowed percentage, because your finance director cannot wave away a number that came out of your own contracts.
Common questions about the 95-5 rule
Does the 95-5 rule apply to B2C as well?
The arithmetic does, because it only depends on how often a category gets repurchased, and WARC has argued the same pattern shows up outside B2B. The defining report is a B2B one, though, and consumer categories with short repurchase cycles produce a very different in-market share.
What if my product has no clear replacement cycle?
Use whatever period your customers actually re-decide in: the contract renewal, the budget cycle, or the point at which the last supplier gets reviewed. If none of those exist, Dawes’ fallback is a short survey of existing customers asking how long they stayed with their previous provider.
Should I cut lead generation if only 5% of buyers are in the market?
No. That 5% is where this quarter’s revenue comes from, so the pages serving it still need to be your best ones. What the rule tells you is where the ceiling sits, so you stop expecting more from those pages than your own cycle length can deliver.
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Update Logs
17 Aug 2026
- First published. Built from the Ehrenberg-Bass B2B report and John Dawes’ own page, with the Forrester and 6Sense positions checked against them and Google’s AI Overview captured on 16 August 2026 to show where the “up to” qualifier goes missing.
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