CMOs: Stop Misjudging Ad Spend by 30% in 2026

Most CMOs are working with bad intel on what their competitors are spending, and those flawed assumptions get in the way of building a strategy that actually works. We’re going to debunk the biggest myths in competitive intelligence to help you make better, more informed decisions.

Myth 1: You Already Know What Your Competitors Are Spending

The belief that you already know what your rivals are spending is a dangerous one. I’ve seen way too many marketing teams run on gut feelings, old reports, or just pure guesswork. The reality is messy. Public companies might give a broad marketing number, but they won’t break down spend by channel or campaign. Private companies? Forget it. Without actual competitive intelligence tools, your estimates are likely way off. A classic mistake is overestimating digital spend. You might see a competitor’s display ads everywhere and assume they’re dropping millions, when they could just be buying cheap remnant inventory or getting a great deal on programmatic. On the other hand, that quiet competitor might be pouring cash into a niche channel you aren’t even watching. According to a 2024 IAB report on digital ad spend trends, companies that actively track competitor investment across channels had market share projections that were 25% more accurate than those just using general benchmarks. Getting real ad spend insights means you have to go deeper than just looking at the surface, digging into impression volumes, estimated CPMs, and spending history on platforms like Google Ads, Meta, TikTok, and even new CTV providers.

Myth 2: Focusing Only on Direct Competitors Is Sufficient

It’s another myth that you only need to watch companies with identical products. That narrow view creates huge blind spots. The market is always changing, with new companies, adjacent industries, and random disruptors all fighting for the same customer’s attention and wallet. Just look at a car company. Their direct competitors are other car brands, sure, but they’re also competing with ride-sharing apps, e-scooters, and even the city bus system for people’s transportation spend. Your intelligence strategy has to go beyond your immediate rivals to include “indirect competitors” (who solve the same need differently) and “substitute competitors” (who offer a completely different solution). If you sell coffee, you shouldn’t just track other coffee brands. You need to watch energy drinks, tea companies, and even fast-food chains selling breakfast drinks. What if an energy drink brand suddenly triples its TikTok advertising spend in a quarter? That’s a huge signal about where your shared demographic is spending their time. A 2025 eMarketer analysis found almost 40% of consumers look at options outside a product’s direct category when making purchase decisions, so you need a wider competitive view. If you ignore this broader field, you’re going to miss the next big threat or opportunity.

Myth 3: Creative Strategy Is Separate from Spend Analysis

Too many CMOs treat ad spend data like it’s just a spreadsheet, totally separate from the creative. This is a big mistake. Knowing *how much* a competitor is spending is only part of the story. You need to understand *how* they’re spending it, their messaging, their visuals, their calls to action, to get the full context. A competitor could be burning millions on digital video, but if the creative is boring or off-target, that spend will yield a lot less. At the same time, a smaller competitor with a tiny budget can get huge results with a smart, resonant campaign. Analyzing their creative next to their spend data can tell you a lot. For example, if you see a competitor suddenly pour money into social campaigns filled with user-generated content (UGC), that tells you they’re betting on authenticity to reach their audience. You don’t have to copy them, but you should understand their strategy and see if it makes sense for your brand too. Are they constantly testing new creative? The ones they stick with are probably their winners. HubSpot’s 2026 State of Marketing report found that brands combining creative analysis with spend data see a 1.8x higher return on ad spend (ROAS). This approach helps you find underserved audiences, spot gaps in messaging, and make creative that actually gets noticed. It’s not enough to know they’re on CTV. You need to see *what* they’re showing.

Myth 4: Historical Data Is Enough for Strategic Planning

Using only historical ad spend data for future planning is like trying to navigate a city with last year’s map. Things change too fast. Sure, past performance gives you some context on long-term trends, but the ad world moves at a speed where that data is often obsolete by the time you’re using it. Budgets can shift overnight, especially when a competitor launches a new product or the market takes a turn. Think about the Q4 holiday shopping season. Your competitor’s data from Q4 of last year might show a huge investment in traditional display. But if you’re only looking at that 2025 data, you’ll completely miss their massive 2026 shift to influencer marketing on TikTok and Instagram Reels or a big new investment in retail media networks. Real-time competitive intelligence shows you these changes as they happen, so you can react now, not next quarter. If a rival suddenly doubles down on a new podcast advertising network, that’s a signal you need to investigate. I’ve personally seen brands pivot mid-campaign based on this kind of real-time data, saving tons of money that would have been wasted on the wrong channels. Seeing a competitor’s spend shift within a 24 to 48-hour window isn’t a nice-to-have anymore. It’s a requirement for survival.

Myth 5: Ad Spend Data Directly Correlates to Market Share

It’s a common misconception that just outspending your competitors will guarantee you win market share. A bigger budget can get you more visibility, but it doesn’t automatically mean more sales. So many other factors are in play: your product quality, pricing, distribution, customer service, and how effective your ads actually are. You can burn through a ton of cash on bad campaigns or by targeting the wrong people, it’s just an expensive way to fail, and much of that spend will be wasted. On the flip side, a smaller brand can have a huge impact with a sharply targeted message in the right channels. This is where you have to connect ad spend data with other market intelligence. For example, if you see a competitor’s ad spend go up in a particular region but their sales data (from third-party market research firms) shows no corresponding lift, it means their advertising isn’t working or they have a distribution problem. A Nielsen report on advertising effectiveness in 2025 showed that while spend is linked to brand recall, things like creative quality and targeting precision have a much bigger impact on actual purchase intent and market share. So think of competitive spend data as one piece of the puzzle. It shows you their strategic intent and resource allocation, not a direct prediction of their market dominance. Getting a handle on competitive ad spend means you have to throw out these old assumptions and start looking at the data. Once you debunk these myths, you can get a much clearer picture of the field you’re playing on, which leads to smarter, more effective advertising campaigns.