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Myth Busting

Myth: "the Rule of 7" — why seven touches is a rule of thumb, not a finding

The claim:
A prospect needs to hear from you seven times before they will buy.
Unsourced

The Rule of 7 is one of the most repeated ideas in sales and marketing. A prospect has to hear from you seven times before they'll buy, so don't give up after two emails. You'll find it in outreach playbooks, social media courses and plenty of sales team slide decks, often with a story about 1930s Hollywood attached. The advice behind it, to be patient and stay visible, is mostly sensible. But the number seven gets treated as a measured fact. We wanted to know who measured it.

Where the claim comes from

Two origin stories come up again and again.

The first is that Hollywood studios in the 1930s found moviegoers needed to see a film's poster or advert seven times before buying a ticket. A typical version, from a New Zealand marketing agency's blog, puts it down to "film industry executives". It doesn't name a studio, a study or a document.

The second credits the American marketing author Dr Jeffrey Lant. His version says you must connect with a prospect at least seven times within 18 months. This one we could trace to Lant's own words.

What we could actually find

The Hollywood story. We looked for a named studio, a research report, a trade paper or even a named executive behind the 1930s poster claim, and found none. Every version we read repeats the story without a citation. Stephen Shaw at An Artful Science reached the same conclusion in his own look at the rule. He argues that the number was never measured, and that earlier advertising writers suggested quite different figures. We can't prove there was never an internal studio study. We can only say we couldn't find one, and that nobody repeating the story links to one.

Jeffrey Lant. This part is real. Lant's book How to Make a Whole Lot More Than $1,000,000 Writing, Commissioning, Publishing and Selling "How-To" Information is copyright 1990, with a revised second edition in 1993. A PDF of it is on his website, and it sets out what he calls the Rule of Seven. He says you need to send a prospect focused, benefit-led messages at least seven times before there's a reasonable chance they've really taken your message in. He says those contacts should happen within 18 months at most. Two things stand out.

The 1990 book is the earliest version of the sales "Rule of Seven" we could read. We can't rule out Lant or someone else using it earlier.

What the advertising research said. The number of exposures needed has been studied properly, and the answer wasn't seven. In 1972 the advertising researcher Herbert Krugman published "Why Three Exposures May Be Enough" in the Journal of Advertising Research. He argued that psychologically there are only three kinds of exposure, and that later ones repeat the effect of the third. The Wikipedia summary of effective frequency quotes the key passage. In 1979 Michael Naples of Lever Brothers reviewed the published studies for the Association of National Advertisers in Effective Frequency. His conclusions were that one exposure within a purchase cycle usually has little effect, and that two exposures is an effective level. He found it was often hard to tell the difference between two and three. He was also careful to say the finding wouldn't hold for every brand or category. Going the other way, the same Wikipedia article notes that Thomas Smith's 1885 book Successful Advertising described a sequence of twenty exposures.

So the documented figures range from two or three to twenty, and none of them is seven. They're also about advertising exposures in a purchase cycle, not sales conversations with a named prospect. Taken together, we've marked the claim Unsourced. There's a real author behind the rule, but not a study behind the number.

What the evidence does support

The research does back the broad idea that a single exposure rarely does much, and that repetition within a sensible window helps. Naples's review, though decades old and about TV advertising, is clear on that. In sales specifically, Velocify's study of nearly 3.5 million inbound leads from 2012 found that more than half of the prospects who converted were first reached after the first call attempt. It also found that 93% were reached by the sixth attempt. That's a vendor's analysis of its own clients' leads, and it's about reaching people rather than closing them, but it does support making more than one attempt.

What none of it supports is a single magic number that works for every buyer, product and channel.

What to do instead

Sources we checked

Spotted a mistake or a number we can't back up? Tell us and we'll fix it.