The Most Expensive Thing in Marketing Is Changing Your Mind

Most businesses think the biggest cost in marketing is what they spend on ads. It is not. The biggest cost is the strategy they abandoned six months in, the agency they replaced after one bad quarter, and the channel they stopped investing in two weeks before it would have started working.

The average marketing agency-client relationship sees 40% of clients churn within the first six months. Nearly half of all businesses pull the plug before the learning phase is even over. They walk away thinking the strategy failed. In most cases, they never gave it long enough to succeed.

This is not a discipline problem. It is a decision-making problem. And it has been studied extensively by psychologists, behavioural economists, and marketing scientists. What they found should change how every business owner thinks about their next marketing decision.

You Have More Options Than Ever. That Is Not Helping.

In 2000, researchers Sheena Iyengar and Mark Lepper set up a tasting booth at an upscale grocery store in California. On alternating days, they displayed either 24 varieties of jam or 6. The 24-jam display attracted more browsers. But when it came time to buy, only 3% of visitors purchased from the large display, compared to 30% from the small one. A 10x drop in conversion, driven entirely by the number of options.

This is what psychologist Barry Schwartz calls the paradox of choice. His research showed that expanding options past about 5 to 9 items reduces both purchase rate and post-purchase satisfaction. People do not just struggle to choose. They struggle to feel good about whatever they chose.

Now apply this to the marketing decisions facing a business owner in 2026.

You have Google Ads, Meta Ads, LinkedIn, TikTok, SEO, local SEO, email marketing, AI tools, chatbots, programmatic, YouTube, influencer marketing, podcasts, review management, CRO, landing page optimisation, and half a dozen agencies telling you that their channel is the one that will change everything. The options are not 24 jams. They are hundreds.

And just like in Iyengar's study, more options are not producing better outcomes. They are producing paralysis, regret, and premature switching.

Satisficers Beat Maximisers. The Research Is Clear.

Nobel Prize-winning economist Herbert Simon introduced a concept in the 1950s that explains exactly what is happening. He called it satisficing, a combination of "satisfy" and "suffice." It describes the decision-making strategy of finding a solution that meets your criteria, rather than exhaustively searching for the theoretically perfect one.

Simon argued this was not laziness. It was rational behaviour in the face of limited information and cognitive capacity. You cannot evaluate every possible marketing strategy, compare all agencies, test every channel, and weigh every trade-off. Your brain is not built for that. Neither is your business.

Schwartz extended this into a framework that divides people into maximisers (those who search for the best possible option) and satisficers (those who search for a good-enough option that meets their standards). His research across multiple studies found something counterintuitive:

Satisficers, on the other hand, pick something that meets their criteria and commit. They spend less time agonising, experience less regret, and are more likely to stay the course long enough for their decision to compound.

Rory Sutherland makes this point elegantly in Alchemy. He argues that in uncertain environments, "satisficing" is not a compromise. It is often the optimal strategy, because the cost of continued searching exceeds the marginal benefit of finding something slightly better. The Eurostar analogy is instructive: engineers spent six billion pounds building new tracks to cut 40 minutes off the London-to-Paris journey. Sutherland suggested WiFi and better food service would have achieved more perceived value for a fraction of the cost. The point: spending more time and money searching for the "best" solution often costs more than the improvement is worth.

For SME marketing, this means something specific. The business that picks Google Ads, hires a competent agency, commits to a 12-month strategy, and optimises within that framework will almost certainly outperform the business that spends three months on Google, switches to Facebook, tries SEO for a quarter, then hires a new agency to "start fresh."

Not because Google Ads is necessarily the perfect channel. But because commitment allows compounding, and switching resets the clock.

Why Commitment Compounds (and Switching Destroys)

Les Binet and Peter Field analysed approximately 1,000 IPA Databank case studies spanning several decades of advertising effectiveness data. Their central finding: the total number of business effects rises steadily as campaign length increases. Short-term campaigns (6 to 12 months) can drive volume, but they almost never impact pricing power, loyalty, or profit margin.

The implication is stark. If you switch strategies every 6 months, you are permanently trapped in the short-term layer of marketing. You pay the learning costs over and over. You never break through to the long-term effects where the real business value lives.

Byron Sharp's research at the Ehrenberg-Bass Institute tells the same story from a different angle. Mental availability, the likelihood your brand comes to mind when someone enters a buying situation, is built through consistent, repeated exposure over time. It is not a switch you flip. It is a signal you strengthen. Every time you change your message, your channel, your visual identity, or your positioning, you weaken that signal and force your audience to start recognising you again from scratch. As Sharp puts it: "Both mental availability and physical availability need ongoing investment."

The practical data backs this up. Google Ads campaigns typically need 90 days of proper setup before they deliver meaningful, consistent performance. Businesses that commit to this window see 60 to 80 percent lower cost per lead by month four compared to month one. But if you quit at month two because the numbers look rough, you never reach that improvement curve. And when you start with a new agency, you pay for the learning phase all over again.

We have written before about how your marketing works in quarters but your customers think in years. The data from Binet and Field is the reason why. The effects that matter most, brand equity, pricing power, reduced price sensitivity, only emerge after sustained investment.

Here is what the compounding timeline actually looks like:

Loss Aversion Is Making You Switch at the Wrong Time

If commitment compounds, why do so many businesses keep switching? Daniel Kahneman and Amos Tversky's prospect theory provides the answer. Their research showed that losses feel approximately twice as painful as equivalent gains feel good. A bad month in your Google Ads account does not just disappoint you. It feels like a crisis. A good month? That just feels like "about right."

This asymmetry creates a predictable pattern in marketing decisions:

The result is exactly backwards. Businesses hold onto failing strategies too long and abandon succeeding ones too quickly. Kahneman's research predicts this, and agency churn data confirms it. 40% of clients leave in the first six months, well before most campaigns have had time to optimise. Meanwhile, the clients who stay average 56 months with retainer-based agencies, the tenure where real compounding occurs.

This connects to something we have explored before: the tendency to ruin marketing just as it starts working. The impulse to tinker, change, and "optimise" is strongest precisely when you should be leaving things alone.

The Optionality Tax

Brian Halligan, co-founder of HubSpot, spent 20 years as CEO before becoming Sequoia's in-house CEO coach. Working with dozens of fast-growth companies, he identified a pattern he calls the optionality tax: "There's a massive tax on optionality when you can move this fast and try a lot of things."

His argument is that keeping your options open feels safe, but it has a real cost. Every decision you defer is a decision that is not compounding. Every strategy you keep "on the table" dilutes the one you are supposed to be executing. The CEOs who succeed, Halligan observed, are the ones who walk through one-way doors faster than their competitors.

The same principle applies to marketing. Every week you spend debating whether to switch from Google Ads to Facebook is a week where neither platform is being optimised. Every month you spend interviewing new agencies is a month where your current campaigns are on autopilot. The search for the perfect strategy has a cost, and that cost is the compounding you missed while searching.

This is not an argument for blind commitment. Some strategies genuinely do not work, and some agencies genuinely are not delivering. But the threshold for switching should be much higher than most businesses set it. A bad month is not a reason to switch. A bad quarter might not be either, if the underlying metrics are trending correctly. We covered the distinction between measuring how hard your marketing is working versus whether it is working, and it is the same principle here. The question is not "did last month feel good?" It is "are we on the right trajectory?"

When to Stay and When to Go

None of this means you should stay with a failing strategy forever. The science of satisficing is not the science of stubbornness. Here is a practical framework for distinguishing between the two.

• The strategy is less than 6 months old and you have not yet completed a full optimisation cycle
• Month-on-month trends are improving even if absolute numbers are not where you want them
• Your agency can explain what they are testing and why, and can show you the data
• You are comparing your results to realistic benchmarks, not to your best-case fantasy
• The fundamentals are sound (targeting, offer, landing page, tracking) and you are iterating within the framework

• You are past the 6-month mark and there is no measurable improvement in the metrics that matter
• Your agency cannot explain their strategy or show you what they have tested
• The data shows a fundamental mismatch between your offer and your audience (not a tactical problem, but a strategic one)
• You have clear evidence that the channel itself is wrong for your business model (not just that results are slow)

What This Means for Your Business

The science points to a clear set of principles.

The most uncomfortable truth in marketing is that the right strategy executed with patience will almost always outperform the perfect strategy executed in six-month bursts. Herbert Simon won a Nobel Prize for proving that "good enough" decisions made quickly and committed to fully tend to outperform theoretically optimal decisions that take forever to make and get abandoned at the first setback.

Your marketing does not need a better strategy. It needs a decision you are willing to stand behind.

Further Reading

• The Long and the Short of It (Binet & Field, IPA) - The foundational research on why long-term campaign commitment outperforms short-term activation
• Maximizing Versus Satisficing: Happiness Is a Matter of Choice (Schwartz et al.) - The original research showing satisficers outperform maximisers on wellbeing despite "worse" objective decisions
• Satisficing (The Decision Lab) - A clear explanation of Herbert Simon's concept and its practical implications
• Prospect Theory: Why Losses Hurt 2x (Kahneman & Tversky) - How loss aversion distorts business decisions, including marketing strategy changes
• Average Marketing Agency Churn: 2026 Report - Current data on how quickly businesses switch agencies and the cost of doing so