One Eighteen Advertising: When Reach Beats Retargeting

One eighteen advertising is a planning approach built on a simple but commercially powerful idea: for most categories, only around 5% of your potential market is actively in-market at any given time. The other 95% are not shopping, not comparing, not ready to buy. Effective advertising has to work for both groups, not just the one with their hand raised.

The ratio matters because it exposes a structural flaw in how most modern marketing budgets get allocated. Performance channels capture intent that already exists. Brand advertising creates the conditions for future intent. A 1:18 framework forces you to think about both, in proportion to how your market actually behaves.

I spent a significant part of my earlier career overvaluing lower-funnel performance. The numbers looked clean. Cost-per-click, cost-per-acquisition, return on ad spend. Everything was attributable, everything was defensible in a client meeting. What I did not fully appreciate at the time was how much of what performance was being credited for was going to happen regardless. The person who typed the brand name into Google was already most of the way there. We were taking credit for the last metre of a experience that started somewhere else entirely.

What Does the 1:18 Ratio Actually Mean in Practice?

The 1:18 framing comes from thinking about market structure rather than campaign mechanics. If you accept that a small fraction of any audience is actively shopping at any given moment, the logical implication is that the vast majority of your advertising impressions are landing on people who are not ready to buy. This is not a problem to be solved. It is a feature of how markets work.

The question is whether those impressions are doing useful work. Are they building familiarity? Are they associating your brand with the right category cues? Are they making your brand easier to recall when that person eventually enters the market six, twelve, or eighteen months from now? If the answer is no, then you are either wasting those impressions or, worse, not running them at all because your budget has been concentrated entirely on in-market signals.

Think about a clothes shop. Someone who tries something on is far more likely to buy than someone who walks past the window. But the window display is what got them through the door. Strip out the window and your fitting room traffic eventually dries up. The same logic applies to advertising. Performance captures the people who are already in the fitting room. Brand advertising fills the shop.

If you are working through how this connects to broader commercial planning, the articles across the Go-To-Market and Growth Strategy hub cover the strategic architecture that sits behind these decisions, from market entry to channel prioritisation to how growth compounds over time.

Why Performance Marketing Alone Cannot Drive Growth

There is a version of performance marketing that works beautifully as a harvesting mechanism. You build awareness and preference over time through broad reach, and then performance channels efficiently convert the demand that has been created. The two work together. The problem is that most organisations have gradually defunded the first part while celebrating the efficiency of the second.

When I was running iProspect and we were growing the team from around 20 people to closer to 100, one of the most consistent conversations I had with clients was about the relationship between brand investment and performance efficiency. The brands that had maintained consistent above-the-line presence had noticeably lower cost-per-acquisition in their paid search campaigns. The brands that had cut brand spend to fund more performance activity were seeing their CPAs creep up quarter by quarter. The correlation was not always clean, but it was there often enough to take seriously.

The mechanism is straightforward. Brand advertising increases the number of people who have your brand in their consideration set. When those people eventually enter the market, they are more likely to search for you by name, more likely to click your ad, more likely to convert. Your performance channels inherit the work that brand advertising already did. Cut the brand investment and you are slowly shrinking the pool of people who will find their way into your performance funnel.

This is not a theoretical concern. Market penetration data consistently shows that the brands with the highest market share are also the brands with the broadest reach strategies, not the most aggressive retargeting programmes. Growth comes from acquiring new customers, not from squeezing more conversion out of the audience you already have.

The Attribution Problem That Skews Budget Decisions

One of the reasons the 1:18 balance gets distorted in practice is attribution. Performance channels are measurable in ways that brand advertising is not. A paid search click has a clear audit trail. A TV spot that ran three months ago and planted a brand name in someone’s memory does not show up neatly in a last-click model. So the investment that built the demand gets no credit, and the investment that captured it gets all of it.

I have sat in enough measurement conversations over the years to know that most attribution models are telling a partial story and being treated as a complete one. Analytics tools are a perspective on reality, not reality itself. The fact that you cannot easily measure the contribution of brand advertising does not mean the contribution is not there. It means your measurement framework is not sophisticated enough to see it.

This is where the Effie Awards judging process was genuinely instructive for me. The cases that made it through to the final rounds were almost never the ones with the cleanest attribution dashboards. They were the ones that could demonstrate a coherent theory of change, show that the strategy made sense given how the category worked, and present results that were plausible rather than just precise. Precision without plausibility is not rigour. It is theatre.

The measurement challenge is real, but it is not a reason to abandon brand investment. It is a reason to develop a more honest approach to approximation. What is the likely contribution of reach activity, even if you cannot measure it exactly? What would you expect to happen to your performance efficiency if you cut brand spend for two years? These are the questions that commercially grounded marketers ask. The answers are rarely comfortable, but they are more useful than a clean-looking attribution report that is structurally incapable of seeing the full picture.

How to Think About Budget Allocation Across the Ratio

There is no universal split that works for every category, every brand, and every growth stage. Anyone who tells you otherwise is selling a framework, not solving your problem. But there are principles that hold across most situations.

First, your brand’s current position in the market changes the calculus. A challenger brand with low awareness needs to invest more heavily in reach than an established category leader. The category leader has accumulated mental availability over years of consistent advertising. The challenger is starting from a deficit and needs to close it before performance efficiency can be maximised. BCG’s work on go-to-market strategy reflects this in how they approach market entry and pricing decisions, where the investment sequencing matters as much as the total budget.

Second, the category purchase cycle affects how much time you have to build preference before someone enters the market. A category where people buy once every ten years requires a very different long-term presence strategy than one where people buy monthly. The longer the cycle, the more important it is to be building familiarity continuously rather than activating only when someone is in-market.

Third, the nature of the decision itself matters. High-consideration purchases, where someone is going to spend significant time evaluating options, give you more opportunity to influence through brand signals before the active search phase begins. Low-consideration purchases are won or lost at the shelf or in the moment, which puts more weight on availability and salience.

Early in my career, working on the Guinness brief at Cybercom, the founder handed me the whiteboard pen and walked out to a client meeting. I was not supposed to be leading that session. But standing there, I had to work out what the brand was actually trying to achieve, not just what the brief said. That discipline, of starting with the commercial objective before reaching for a channel or a format, is one I have carried into every planning conversation since. The 1:18 question is in the end the same question: what are you trying to achieve, and who do you need to reach to achieve it?

Where Growth Loops Fit Into the Picture

One of the more useful developments in growth thinking over the past decade is the concept of the growth loop, where acquisition, engagement, and retention feed each other in a compounding cycle rather than sitting in separate silos. Hotjar’s work on growth loops illustrates how feedback between product usage and acquisition can accelerate growth in ways that linear funnel models do not capture.

The 1:18 framework connects to this because it is fundamentally about building a system, not running a campaign. If your advertising only addresses the 5% who are in-market right now, you are not building a loop. You are running a conversion exercise. The loop requires that you are continuously adding new people to your brand’s consideration set, so that the pool of potential buyers is always being replenished rather than gradually depleted.

This is also where creator-led content and always-on social strategies have earned their place in media plans. Not because they are fashionable, but because they extend reach into audiences who are not yet in-market at a cost structure that is accessible to brands that cannot afford traditional broadcast. Later’s research on creator-led go-to-market campaigns shows how this can work in practice, particularly for brands trying to build familiarity with new audience segments ahead of a key purchase window.

The point is not that any one channel solves the 1:18 problem. It is that the planning framework should be oriented around building the broadest possible base of future buyers, not just optimising the conversion of current ones.

The Compounding Cost of Getting This Wrong

The consequences of over-investing in performance at the expense of reach are not immediate. That is what makes the mistake so easy to make and so hard to reverse. In the short term, cutting brand spend and redirecting to performance often looks like a good decision. CPAs stay flat or improve. Revenue holds. The CFO is happy.

But over two or three years, the pool of people who have your brand in their consideration set shrinks. Fewer people are searching for you by name. Your branded search volume declines. Your non-branded CPAs rise as you compete harder for generic intent. Your retargeting audiences get smaller. The efficiency that looked so compelling when you made the cut starts to erode, and by the time the problem is visible in the numbers, you are already two or three years into a brand deficit that will take sustained investment to recover from.

I have seen this pattern in turnaround situations more than once. A business that has been running on performance only for several years, with declining brand health metrics that nobody was watching because they were not in the attribution model. Rebuilding takes longer than the decline, because brand familiarity accrues slowly and erodes faster than most people expect.

The growth hacking examples that get celebrated in the marketing press are almost always early-stage stories, where a brand is building from zero and a clever acquisition mechanic creates rapid scale. What those stories rarely cover is what happens five years later, when the growth hack has been copied by every competitor and the brand needs to compete on something more durable than a referral loop.

Durability comes from brand equity. Brand equity comes from consistent investment in reach over time. The 1:18 framework is, at its core, an argument for that durability.

Applying This to Specific Market Contexts

The 1:18 principle applies broadly, but the way it manifests differs by market context. In B2B, the in-market window is often longer and more predictable, tied to budget cycles, contract renewals, or organisational triggers. The implication is that B2B brands have more time to build familiarity before a decision point, but also that the decision process involves more people, each of whom needs to have encountered the brand in a positive context. Forrester’s analysis of go-to-market challenges in regulated industries highlights how complex buying committees make brand familiarity even more critical, because you are not just influencing one buyer but an entire decision-making group.

In consumer categories, the challenge is different. Purchase cycles are shorter, consideration sets are built and rebuilt more frequently, and the brand signals that matter are often more emotional and less rational. But the underlying dynamic is the same: the brands that win over time are the ones that have been present in people’s lives before they needed to make a decision.

Product launches present a specific version of this challenge. When you are entering a market, you have no accumulated brand familiarity to draw on. The temptation is to go straight to performance because you need revenue quickly. But without some investment in reach and awareness, your performance campaigns are fishing in a very small pool. BCG’s work on launch strategy makes the case for sequencing investment carefully at launch, building awareness before optimising for conversion, precisely because the 1:18 dynamic is most acute when you are unknown.

There is more on how these dynamics play out across different growth stages and market entry scenarios in the Go-To-Market and Growth Strategy hub, which covers the full strategic arc from positioning to scaling.

What Good Planning Looks Like With This Framework

A planning process built around the 1:18 ratio starts by being honest about the size and shape of your potential market, not just your current customers or your retargeting audiences. Who could buy from you in the next two years? How many of those people have heard of you? How many have a positive impression? How many would consider you if they entered the market tomorrow?

From there, the budget allocation question becomes less about channel preference and more about what work needs to be done. If your brand awareness among your potential market is low, the priority is reach. If awareness is high but consideration is low, the work is different. If consideration is high but conversion is low, then yes, performance investment makes sense. The framework is diagnostic before it is prescriptive.

The planning also needs to account for time. Brand advertising does not pay back in the same period it is run. The investment you make this quarter is building the conditions for conversion next year. That is a hard case to make in a quarterly review, but it is the honest one. The businesses that have the discipline to make that case and stick to it are the ones that build durable market positions rather than efficient-looking short-term numbers.

Managing hundreds of millions in ad spend across thirty industries over twenty years has given me a fairly clear view of what separates the brands that compound from the ones that plateau. It is rarely the quality of the creative or the sophistication of the targeting. It is usually whether the business had the commercial discipline to invest in reach when the in-market signals were not there to justify it. That discipline is what the 1:18 framework is designed to support.

About the Author

Keith Lacy is a marketing strategist and former agency CEO with 20+ years of experience across agency leadership, performance marketing, and commercial strategy. He writes The Marketing Juice to cut through the noise and share what works.

Frequently Asked Questions