How Long Before You Know If Marketing Is Working?

The Gist

Most of your buyers aren't in the market right now. Decades of advertising research say how long it takes to register depends on how familiar your brand is, how complex your offer is, and how new the category feels. For most B2B companies and credit unions, all three point the same direction.

Went to an outdoor concert recently. Rain had been in the forecast for days. Not a maybe. The percentage kept climbing all week.

Almost nobody was prepared.

Then it opened up. Not a drizzle, a downpour. Everybody piled into the concourse soaked. And then the real show started. People asking the janitorial staff for trash bags. People stealing trash bags when the staff turned around.

Grown adults in garbage bags, at a stadium, because the forecast said rain for five straight days and nobody looked.

I don’t think anybody’s dumb. It was beautiful all day. You’re thinking about parking, whether you’re eating first, what time the opener goes on. Rain was later, and later isn’t now.

The forecast was free, accurate, repeated for five days, and sitting in everybody’s pocket. It still didn’t land.

This is what your marketing is up against

Your prospective customers are not evaluating you. They’re running their own companies, dealing with their own problems, and thinking about the twenty-one things on their plate this week.

Your message can be accurate. It can be in front of them repeatedly. It can be free to consume and genuinely useful. And it will still not register, because they don’t have the problem yet.

People don’t notice you when things are fine. They notice when something hurts.

That’s not a flaw in your marketing. That’s how attention works, and it works that way for all of us.

What the research actually says

You’ve probably heard that a buyer needs to see your message seven times before they act. That one is worth being careful with. The rule of seven traces back to a 1930s movie industry maxim, and the familiar escalating list that starts with “the first time people look at any given ad, they don’t even see it” comes from an 1885 advertising guide by Thomas Smith. Neither is research.

But there is a real body of research here, and it’s been argued over for decades. It’s called effective frequency.

Michael Naples’ 1979 book of that name, published by the Association of National Advertisers, established the concept for the industry and produced the “three plus” rule of thumb that dominated media planning for two decades. According to Jones, that three-plus strategy was implemented by 90% of packaged-goods advertisers in the US.

Then John Philip Jones pushed back hard. In When Ads Work (1995), using single-source data on purchases within a week of exposure, he found that a single exposure produced the majority of the positive share effect, with additional exposures adding only small gains. His conclusion was that effective frequency is one, and that consistency of presence matters more than concentration.

So one camp says three or more. The other says one is enough. Both have real data behind them.

Why both camps are right, and what that means for you

The paper that resolves this is Gerard Tellis in the Journal of Advertising Research (1997), and it’s the one worth knowing.

Tellis argues that neither the minimalists nor the repetitionists are correct, because effective frequency isn’t a single number at all. It depends on three things: how familiar your brand already is, how complex your message is, and how novel it is. The contradictory findings in the literature are explained by researchers studying different products under different conditions on those three factors.

Which means the question isn’t how many times. It’s what are you selling, to whom, and how well do they already know you.

Now run your own business through those three factors.

If you’re a B2B services company or a credit union, your brand is probably not well known outside your immediate market. What you sell is not a simple product someone understands at a glance. And for a lot of buyers, the category itself is unfamiliar, which means they’re learning what this kind of solution even is at the same time they’re evaluating you.

All three point the same direction: toward the high end, not the low one.

A soda company running a familiar message about a familiar product might genuinely get what it needs from one exposure. You are not that.

What this means for how you judge marketing

Here’s where it goes wrong in practice.

You run ads for 30 days. Or you do one campaign. Or you sit through a focus group. Nothing much happens, so you conclude it doesn’t work and move on to the next thing.

That was one forecast on a sunny afternoon.

The people you reached weren’t in the market. Not because your message was wrong, but because they weren’t standing in the rain yet. Six months from now some of them will be, and what determines whether they think of you is whether you were familiar before the problem showed up.

This is also why the thing that finally produces a lead almost never deserves the credit. Somebody fills out a form after a webinar and the webinar looks like the winner. But they’d been reading your stuff for eight months and finally had a reason to act.

What to do instead

None of this is an argument for spending forever without checking. It’s an argument for judging things on the right timeline with the right measures.

Know your own sales cycle. If it takes six months from first contact to closed deal, then this quarter’s results reflect last spring’s marketing. That one fact should reframe how you read every report you get.

Watch the KPIs that move first. Engaged visits, clicks, replies, people getting to the right page and staying. Those show up long before qualified leads do. If those are moving and leads haven’t landed, that’s usually timing.

Ask your customers directly. “How did you first hear about us” answered by a human beats any dashboard you own, and it’s usually the only way you’ll ever learn about the stuff you can’t track.

And be honest about the difference between something that’s slow and something where nothing is happening at all. Those need opposite responses. 

 

The Bottom Line

Most of the people you want as customers are not in the market today. They’re having a beautiful afternoon and not thinking about you at all.

The work is being familiar before that changes.

That’s what all the showing up is buying you. Recognition on the day they finally need an umbrella.

If your marketing keeps getting judged on a 30-day window and killed before it can work, that’s usually a leadership problem, not a channel problem. Let’s talk.

Frequently Asked Questions

It depends on your sales cycle, but decide before you launch. At 30 days you’re looking for movement in early KPIs like engagement and traffic quality, not closed deals.

There is no single number, and the research has argued about it for decades. Tellis (1997) found it depends on three things: how familiar your brand is, how complex your message is, and how novel it is. Unfamiliar brand, complex offer, unfamiliar category all push the number higher.

No. It’s an argument for measuring on the right timeline. Plenty of marketing should be cut. Just not because it didn’t produce revenue in month one.

Look at whether the early indicators are moving, ask new customers how they first heard about you, and watch whether your name shows up in inbound conversations unprompted.

Tara Lilly

Founder, Tara Lilly & Co. · Fractional Marketing Leader

Tara Lilly is the founder of Tara Lilly & Co. and a fractional CMO for B2B companies. She leads strategy and brings a senior team of specialists who use AI to execute. Before starting the company, she spent 15+ years leading marketing teams across credit unions, agencies, and startups, including work on Volvo Trucks North America.

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