Margin Erosion

Margin Erosion: Your Best Seller Might Be Killing Your Profit

Merchandising Solves This | Week 2

There's a question I ask when I first start working with a brand, and it never fails to create an uncomfortable pause in the room.

"Which products in your line are the most profitable?"

Not the best sellers. Not the highest revenue drivers. The most profitable.

Most teams can't answer it. Not because they don't care about margin. They care deeply. But because the data to answer that question clearly is rarely sitting in one place, in a format that's easy to act on.

And so brands keep investing in products that look healthy on the surface while quietly experiencing margin erosion: a slow, season-by-season leak that's hard to see until it becomes hard to ignore.

The Margin Problem Nobody Wants to Admit

Here's what I hear most often: "We need better margins, but we can't raise prices without scaring off customers."

It's a real tension. In outdoor, cycling, and snowsport, customers are price-aware, performance and value-driven. But here's what that framing gets wrong: margin erosion isn't just a pricing problem. It's a product mix problem. And that's where merchandising comes in.

The brands that figure this out stop asking "how do we charge more?" and start asking "are we building and supporting the right products in the first place?"

The Symptoms Worth Paying Attention To

You might have margin erosion hiding in your product line if any of these are familiar:

Sales are up but profit is flat. Volume is moving but the bottom line isn't growing with it. That gap is almost always a mix problem.

Your "hero" products are the ones getting discounted. If the products you're leading with are the same ones ending up on markdown, that's not a sales strategy. That's a warning sign.

Markdowns feel inevitable. If you're planning for clearance before the season even starts, the product mix or the buy wasn't right to begin with.

More volume, same profit. Growing the top line without growing the bottom line means complexity is eating what growth is producing.

The Trap: High Revenue ≠ High Profit

Here's the scenario I see play out more than almost any other.

A brand has a $400 jacket. It looks incredible on the line sheet. It wins at trade shows. The sales team loves pitching it. It shows up strong in the revenue report.

And then end of the season hits. The jacket is sitting. Thirty percent off. Then forty. The markdown that felt like a necessary evil has become a predictable one. It happens every year.

Meanwhile, there's a $150 fleece. Nobody talks about it much. It's not the product anyone leads with at a sales meeting. But season after season, it sells through at full price. Quietly. Consistently. No hand-holding, no markdowns, no clearance rack.

That fleece is printing profit. The jacket is eroding it.

This is the trap. High revenue does not always equal high profit. And until a brand sees their line through that lens, they'll keep celebrating the wrong products.

Understanding Realized Margin (and Why Most Brands Can't Measure It Yet)

To really understand where margin is going, it helps to know the difference between gross margin and realized margin.

Gross margin is the number most brands track: the difference between what a product sells for and what it costs to make. It's a clean, accessible number and it matters. But it's calculated at full price, before the commercial reality of a season plays out.

Realized margin is what's left after a product has run its full life in the market. It accounts for the average selling price after markdowns, the return rate, the co-op marketing and retail support dollars spent against it, and the cost of carrying inventory that didn't sell through. A product with a 55% gross margin that ends up 30% on clearance isn't a 55% margin product. It's something considerably lower, and the gap compounds season after season.

Here's the truth: most brands don't have the data infrastructure to calculate realized margin easily. Pulling together sell-through rates, markdown depth, return rates, support spend, and inventory carrying costs into a single product-level number requires reporting sophistication that most teams, even at established brands, simply aren't operating with yet. And that's okay.

The concept still matters, because it reframes how you think about your line. But the practical work of improving margin doesn't require a perfect number. It requires better questions, asked consistently, using the data you have.

What Merchandising Actually Does Here

Margin improvement through merchandising is about getting clear on where the real value in your line lives, and making decisions that protect and amplify it.

Identifying your margin heroes and clean sellers. Every line has them, the products that sell-through consistently at or near full price, season after season, with minimal markdown and minimal hand-holding. They're often not the flashiest products in the line. They're the workhorses. They deserve more support, more inventory investment, and more real estate in the assortment than they typically get.

Naming your margin killers and markdown magnets. Some products look busy. They generate activity, fill space on a line sheet, give reps something to talk about. When you follow the dollars through, they're costing more than they're contributing. Every season you run a markdown magnet is another season you're subsidizing underperformance.

Aligning investment with margin potential. Not every product deserves the same level of development spend, marketing support, or inventory commitment. Merchandising creates the framework to make those decisions deliberately instead of by default.

The Truth About Profitability

Profitability isn't a finance problem. It's a product problem. And it's a solvable one.

The brands building consistently healthy margins aren't doing it by raising prices across the board. They're doing it by being frank about which products earn their place in the line, and having the discipline to act on that clarity season after season.

Bigger isn't better. Profitable is better.

Where to Start

You don't need perfect data to start improving margin. You need to ask better questions with the data you already have.

Pull your full-price sell-through by model. What percentage of each product sold at full price versus on markdown? This single metric is the most accessible proxy for margin health that most brands can pull today. Sort your line from highest to lowest full-price sell-through. The picture becomes clear quickly.

Look at your markdown pattern over time. Is it the same products ending up on clearance every season? That's a buy problem, a product problem, or both. A pattern that repeats isn't bad luck. It's information.

Compare your top revenue models to your top sell-through models. They won't be the same list. The gap between those two rankings is where margin erosion is hiding. Products that rank high in revenue but low in full-price sell-through are your markdown magnets. Products that rank high in sell-through but lower in revenue are often underinvested and under scaled.

Find your clean sellers and ask why they aren't bigger. If you have products that consistently sell through at full price with minimal support, the question isn't why they're successful. It's why you haven't doubled down on them. More inventory, more colors in the right silhouettes, more real estate in the assortment. Clean sellers deserve to be supported.

The goal isn't a perfectly lean line with zero markdowns. Markdowns are a normal part of retail. The goal is a line where margin is earned intentionally. Know which products are doing the heavy lifting and build the assortment to support them.

You might be surprised how much profitability is already sitting in your existing line, waiting to be unlocked. Not by charging more. By seeing more clearly.

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The Outdoor Merchant is a product merchandising consultancy specializing in outdoor, cycling, and snowsport industries. Each week in this series, we explore a real business problem that smart merchandising was built to solve.

Follow along for Week 3, and reach out to sarah@theoutdoormerchant.com if any of this is hitting close to home.