Advertising Is Not a Fixed Cost. Here’s Why That Matters.
Advertising is not a fixed cost in the traditional accounting sense, though many businesses treat it like one. Unlike rent or salaries, advertising spend is discretionary: it can be cut, scaled, redirected, or restructured based on business conditions, market opportunity, and commercial objectives. Whether it should be treated as fixed, variable, or something in between is one of the more consequential decisions a business can make about its growth model.
The classification matters more than most finance teams acknowledge. How you categorise advertising spend shapes how you budget it, how you defend it in a downturn, and whether you ever build the kind of sustained market presence that compounds over time.
Key Takeaways
- Advertising is technically a variable cost, but businesses that treat it as purely discretionary tend to cut it at precisely the wrong moment in the economic cycle.
- The fixed vs. variable framing is less useful than thinking about advertising as an investment with a time horizon: some spend builds assets, some captures short-term demand.
- Performance marketing captures existing intent. Brand advertising creates it. Most businesses underinvest in the latter because it is harder to measure, not because it delivers less value.
- A percentage-of-revenue budgeting model ties advertising to business performance, but it also means you spend less when conditions are hardest and competitors are quietest.
- The businesses that grow through downturns are usually the ones that maintained or increased advertising investment when others pulled back.
In This Article
- What Does Fixed vs. Variable Actually Mean Here?
- Why the Budgeting Model You Choose Has Real Consequences
- The Performance Marketing Trap
- How Sector Context Changes the Calculation
- What Happens When You Cut Advertising in a Downturn
- The Investment Frame: A More Useful Way to Think About It
- Practical Implications for Budget Planning
- The Measurement Problem That Distorts the Decision
This question sits at the heart of go-to-market planning, and it comes up more often than you might expect in commercial strategy conversations. If you want a broader framework for how advertising fits into growth planning, the Go-To-Market and Growth Strategy hub covers the full picture.
What Does Fixed vs. Variable Actually Mean Here?
In accounting, fixed costs do not change with output volume. Rent, depreciation, and most salaries are fixed. Variable costs move with production or sales: raw materials, fulfilment, commissions. Advertising sits in neither category cleanly.
Some businesses treat advertising as a fixed line in their annual budget, committing a set spend regardless of revenue performance. Others tie it directly to sales, spending a percentage of revenue or a fixed cost-per-acquisition. Most businesses do something in between, with a base budget that is relatively stable and a variable layer that flexes with campaigns, seasons, or commercial priorities.
The honest answer is that advertising is a semi-variable cost with strategic properties that neither accounting category captures well. It is discretionary in the short term, but its effects often extend well beyond the period in which it is spent. That mismatch between when you spend and when you benefit is what makes the classification genuinely complicated.
Why the Budgeting Model You Choose Has Real Consequences
I have sat in enough budget reviews across enough industries to know that how you frame advertising spend determines how it gets treated when pressure arrives. If it is a fixed cost, it is protected. If it is variable, it is the first thing cut when a CFO needs to find savings.
The percentage-of-revenue model is the most common approach I have seen in mid-market businesses. It has an intuitive logic: spend a proportion of what you earn. The problem is that it creates a procyclical dynamic. When revenue falls, you spend less on advertising at exactly the moment when maintaining visibility might help you stabilise or recover. When revenue grows, you spend more, often chasing demand that is already there rather than building for the next cycle.
The businesses I have seen grow most consistently tend to treat a meaningful portion of advertising as a capital allocation decision rather than an operating expense. They ask: what does sustained presence in this market deliver over three years, not just this quarter? That framing changes the conversation entirely.
It also changes how you evaluate channels. If you are running pay per appointment lead generation, the cost structure is inherently variable and tied to output. That is a different animal from a brand awareness campaign that you expect to pay dividends over 18 months. Treating both as the same category of spend leads to bad decisions about both.
The Performance Marketing Trap
Earlier in my career, I overvalued lower-funnel performance channels. Paid search, retargeting, conversion-focused display: these felt clean because you could see the numbers. Click, conversion, cost per acquisition. The attribution model said it was working, so you kept spending.
What I understand now, and what I think the industry is slowly coming to terms with, is that a significant portion of what performance marketing gets credited for was going to happen anyway. The person who was already searching for your product, already in-market, already close to a decision: you did not create that demand. You captured it. That is valuable, but it is not the same thing as growth.
Think about a clothes shop. Someone who picks something up and tries it on is far more likely to buy than someone who walks past the window. But the shop did not create the desire for new clothes. Something upstream did that. If you only invest in the fitting room and never in the window display, you will eventually run out of people walking through the door.
This is why go-to-market execution feels harder than it used to for many businesses. They have optimised the bottom of the funnel to within an inch of its life and starved the top. The pipeline looks fine until it does not, and by then the problem is 12 months old.
Performance budgets tend to be treated as variable costs, adjusted monthly or quarterly based on return. Brand budgets, when they exist at all, are often treated as fixed, protected lines. The irony is that the spend with the longer-term compounding effect is the one that gets cut first when leadership wants to see a number move quickly.
How Sector Context Changes the Calculation
The right answer to whether advertising should be fixed or variable depends heavily on the category you are operating in. A fast-moving consumer goods business with high purchase frequency and short decision cycles operates differently from a B2B technology company with 9-month sales cycles and a handful of enterprise accounts.
In B2B, advertising often functions more as a conditioning tool than a direct response mechanism. You are building familiarity, credibility, and category presence over time so that when a buyer enters the market, you are already on the shortlist. That kind of spend resists variable treatment because its value is cumulative. Cutting it for two quarters and then restarting does not just pause the effect, it can set you back further than the saving was worth.
I have written about this dynamic in the context of B2B financial services marketing, where trust and regulatory context make the brand-building case even stronger. In regulated categories, the cost of rebuilding lost credibility is almost always higher than the cost of maintaining it.
The BCG framework for understanding financial needs across an evolving population makes a similar point about the importance of sustained presence in financial services markets, where needs shift over time but brand relationships are built over years.
Channel context matters too. Endemic advertising, where you place ads in environments that are directly relevant to your category, operates with different efficiency assumptions than broad reach media. The cost-per-relevant-impression is different, and so is the appropriate budget model.
What Happens When You Cut Advertising in a Downturn
This is where the fixed vs. variable debate becomes genuinely consequential. The historical pattern is consistent: businesses that maintain or increase advertising investment during economic contractions tend to emerge with higher market share than those that cut. The mechanism is straightforward. When competitors go quiet, share of voice increases without requiring proportionally higher spend. The audience is still there. The category still exists. You are just one of fewer voices.
I have seen this play out directly. During the period when I was growing an agency from a loss-making position to one of the top five in the country, some of the most effective client work we did was during periods when their categories were contracting. Competitors pulled back. We kept spending, often with tighter targeting and sharper creative. The results were disproportionate to the investment because the competitive landscape had temporarily thinned.
None of that is possible if advertising is treated as a pure variable cost that gets cut whenever revenue softens. The businesses that benefit from downturns are the ones that had the commercial conviction to treat advertising as an investment with a time horizon, not just a dial to turn up and down with the quarterly numbers.
That conviction requires good underlying data. Before you can make the case for maintaining spend, you need to understand what your advertising is actually doing, which means proper attribution, honest measurement, and a clear view of what digital marketing due diligence looks like in your specific context.
The Investment Frame: A More Useful Way to Think About It
The fixed vs. variable framing is in the end a finance question. The more useful marketing question is: what is the time horizon of this spend, and what does it build?
Some advertising spend is genuinely short-term and transactional. A promotional campaign, a product launch, a seasonal push. This spend has a clear output, a defined window, and a measurable return. It makes sense to treat this as variable, scaling it with opportunity and pulling back when the window closes.
Other advertising spend is building something that compounds: brand recognition, category association, audience trust. This spend does not return cleanly in the quarter it is made. Its value accrues over time and shows up in pricing power, conversion rates, and customer lifetime value rather than in a direct attribution report. Treating this as a variable cost that can be cut when the quarter is tight is a category error.
The businesses that get this right tend to have a clear framework for how corporate and business unit marketing budgets interact. If you are operating across multiple product lines or markets, the corporate and business unit marketing framework for B2B tech companies is worth reading for how to structure those decisions without creating internal competition for budget that undermines both levels.
Growth hacking approaches, which tend to focus on rapid experimentation and short-cycle optimisation, can work well at the variable layer. Semrush’s breakdown of growth hacking examples shows how the model applies across different business types. But growth hacking does not replace the sustained investment layer. It supplements it.
Practical Implications for Budget Planning
If I were advising on how to structure an advertising budget today, I would suggest thinking in three layers rather than one.
The first layer is a base investment in brand and category presence. This should be treated as close to fixed as your business model allows. It is the spend that maintains your position in the market regardless of short-term commercial fluctuations. The amount will vary by category and competitive intensity, but it should be defined by strategic logic, not by what is left after everything else is funded.
The second layer is campaign-based spend tied to specific commercial objectives: launches, promotions, seasonal peaks, pipeline generation. This is genuinely variable and should be evaluated on return. It scales up when opportunity exists and contracts when it does not.
The third layer is experimental, a smaller allocation for testing new channels, formats, or audiences. This should be explicitly ring-fenced from both layers above so that it does not cannibalise base investment when results are uncertain, and so that it does not get cut when the experimental results are mixed.
Before you can make these decisions well, you need a clear picture of your current commercial position. A rigorous analysis of your company website for sales and marketing strategy is often the most practical starting point, because it surfaces the gaps between what your advertising is promising and what your commercial infrastructure can actually deliver.
There is also a useful parallel in how growth hacking frameworks approach resource allocation: the principle of separating experiments from core operations applies equally to advertising budgets. You cannot learn anything useful about new channels if you are drawing from the same pool as your proven spend.
The Measurement Problem That Distorts the Decision
One reason advertising gets treated as a pure variable cost is that brand investment is genuinely harder to measure than performance spend. If you cannot show the CFO a clear return, the argument for protecting the budget is harder to make.
I judged the Effie Awards for several years. The Effies are the closest thing the industry has to a rigorous effectiveness standard, requiring entrants to demonstrate actual business outcomes rather than creative merit. What struck me consistently was how few entries could clearly articulate the mechanism by which advertising had driven the commercial result. The data was often there. The story connecting it was not.
That gap between what advertising does and what businesses can prove it does is a real problem, and it has consequences for how budgets get classified and protected. The answer is not to abandon brand investment because it is hard to measure. It is to get better at honest approximation: tracking leading indicators like brand awareness, share of voice, and search volume trends alongside lagging commercial metrics, and building a coherent narrative that finance teams can follow.
Marketing does not need perfect measurement. It needs honest approximation and the intellectual honesty to distinguish between correlation and causation when presenting results internally.
The broader question of how advertising fits into your overall growth model is one worth revisiting regularly, not just at annual planning time. The Go-To-Market and Growth Strategy hub is where I work through these questions in more depth, covering everything from channel strategy to commercial positioning.
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.
