The 95:5 rule: why most of your buyers are not ready to buy yet

MIKE BISCOE

Jul 3

5 min read

Only about five percent of your potential buyers are ready to purchase at any one time. Here is where that number comes from, how to work it out for your own category, and what it means for where you put your budget.

The 95:5 rule states that, at any given moment, only about five percent of your potential buyers are actually in the market to buy. The other ninety-five percent, although they may be exactly the right kind of customer, are out of market and not ready to purchase. It is a simple idea with significant consequences for how you spend your marketing budget.

IN BRIEF

Only about 5% of buyers are in-market at any one time. The other 95% are in-target but out of market.
The ratio depends on how often people buy. As a rough guide, the in-market share is one divided by four times the number of years between purchases.
It applies to B2C as well as B2B. Automotive sits near 88:12, and even toothpaste is slower for the buyer than it looks.
The implication is to invest in long-term, broad-reach brand building, so buyers remember you when they enter the market.

What is the 95:5 rule?

The 95:5 rule is a marketing heuristic which says that only around five percent of a category's buyers are ready to purchase at any one time. The remaining ninety-five percent are not. They will buy eventually, but not today. The rule is most useful as a way of explaining to non-marketing colleagues why a brand cannot rely solely on reaching the small group of people who happen to be ready to buy right now.

Where does the 95:5 rule come from?

The rule comes from research by the Ehrenberg-Bass Institute for Marketing Science, carried out with LinkedIn's B2B Institute. The maths behind it is elementary. In the categories studied, the average replacement purchase cycle was about five years. That means only twenty percent of buyers would be in market in any one year. If sales targets are set quarterly, then only a quarter of that twenty percent, which is five percent, would be in market in any one quarter. Hence 95:5.

How is the 95:5 rule calculated?

You can work out the ratio for your own category from a single number: how often your customers buy. As a rough guide, the share of buyers in market at any one time is one divided by four times the number of years between purchases, assuming you measure against quarterly sales targets.

Worked through for a few common cycles:

A five-year cycle gives about 5% in market, so roughly 95:5.
A two-year cycle gives about 12.5% in market, so roughly 88:12.
A one-year cycle gives about 25% in market, so roughly 75:25.

The longer the gap between purchases, the larger the out-of-market majority you need to keep reaching.

Does the 95:5 rule apply to B2C?

Although the 95:5 rule was developed in a B2B context, the same thinking applies to B2C. Take automotive. If you assume a repurchase cycle of around two years, which is often longer in reality, and quarterly sales targets, which are often shorter, you arrive at a ratio close to 88:12. Only about twelve percent of buyers are in market at any one time.

Even fast-moving consumer goods follow the pattern. A category can be fast moving for the retailer but slow for the individual shopper. Think about how often you actually buy toothpaste or shampoo. For any one household the gap between purchases is longer than the shelf turnover suggests, so most buyers are still out of market on any given day.

Why does the 95:5 rule matter for marketing?

The rule has a clear implication: to protect your future sales, you need to reach the out-of-market majority, not just the in-market few. Tightly targeted, short-term activity captures the small group ready to buy now. Broad-reach, long-term brand building plants the associations that make the other ninety-five percent think of you when their time comes.

This supports the wider case for brand building set out by Les Binet and Peter Field in The Long and the Short of It. Their analysis suggests splitting budgets roughly sixty percent to brand building and forty percent to short-term activation, or closer to 45/55 in B2B. The 95:5 rule and the 60/40 rule reach the same conclusion from different directions. Neither is an argument for brand building instead of activation. Both make the case for not neglecting it.

The goal is mental availability: being easy to recall, so that when a buyer finally enters the market, your brand is already a candidate.

Does the exact ratio matter?

No. Whether the real figure for your category is 95:5, 88:12, 80:20 or 70:30 makes little practical difference. The strategic point is the same in every case. Most of your target audience is not ready to buy right now. If you wait until they are, you risk being too late, because the brands that built awareness earlier will already be front of mind.

What should you do about it?

A few practical conclusions follow from the 95:5 rule:

Spend at least as much attention and budget on future buyers as on those ready to buy today.
Favour broad reach over narrow targeting for brand building, so you build awareness across the whole category.
Invest in distinctive brand assets and a clear position, so you are easy to remember and recognise.
Keep some short-term, targeted activation for the minority who are in market now. It is not either or.
When you make the case to your CEO or CFO, use the 95:5 logic alongside the 60/40 rule to justify longer-term investment.

FREQUENTLY ASKED QUESTIONS

What is the 95:5 rule in marketing?

The 95:5 rule states that at any one time only about five percent of potential buyers are in the market to buy, while the other ninety-five percent are not yet ready. It explains why marketing aimed only at ready buyers reaches a small fraction of the people who will eventually purchase from the category.

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Who created the 95:5 rule?

The 95:5 rule was developed by the Ehrenberg-Bass Institute for Marketing Science, in research carried out with LinkedIn's B2B Institute. It is based on how often buyers in a category make a purchase, known as the interpurchase or replacement cycle, which for the categories studied averaged around five years.

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Does the 95:5 rule apply to B2C as well as B2B?

Yes. Although it was developed for B2B, the same logic applies to B2C. In automotive, a repurchase cycle of about two years gives a ratio near 88:12. Even everyday categories such as toothpaste are bought far less often by each consumer than retailers might assume, so most buyers are out of market.

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What does the 95:5 rule mean for marketing budgets?

It supports investing more in long-term, broad-reach brand building rather than only in short-term, tightly targeted campaigns. The aim is to build mental availability, so that when the out-of-market majority eventually buy, they already recognise your brand. This echoes Binet and Field's case for a roughly 60/40 brand-to-activation split.

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Getting the balance right between long-term brand building and short-term performance is one of the hardest judgements in marketing, and one of the most consequential. If you would like help making that case in your business, or building a strategy around it, that is what Marketing Means More does. Get in touch for a free thirty-minute conversation.

Written by Mike Biscoe, Fellow of the Chartered Institute of Marketing and founder of Marketing Means More, a brand and strategic marketing consultancy based in London.