Author: Taylor Warfield, Former Bain Manager and interviewer

Last Updated: October 14, 2026

 

A fashion case interview is a consulting case set in the apparel, footwear, or accessories industry, where you diagnose a problem like falling revenue or weak sell-through and recommend an action backed by margin math. This guide gives you the six case types, the metrics interviewers expect you to know, a full walkthrough of Bain's published FashionCo case, and a worked example with the math done for you.

 

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Key Takeaways

 

Fashion cases reward candidates who understand that inventory loses value on a clock, and who can compare two commercial options with real math in under five minutes.

 

• Six case types cover almost every fashion prompt: profitability, revenue decline, pricing and markdown, market entry, channel strategy, and brand portfolio decisions

 

• Bain publishes a free fashion case called FashionCo, and its recommended answer favors intermittent sales over a rewards program by roughly $50M

 

• Gross margins vary widely by segment: Inditex reported 58.3% in FY2025 while Nike reported 42.9% in FY2026

 

• The National Retail Federation estimated that 19.3% of online sales were returned in 2025, which makes returns a live cost lever in any online fashion case

 

• Full-price sell-through is the single number that most often explains a fashion margin problem, and it rarely appears in the prompt unless you ask

 

• Naming one current shift such as tariffs, resale, or AI demand planning separates you from candidates running a generic profitability tree

 

What Is a Fashion Case Interview?

 

A fashion case interview is a consulting case set in the apparel, footwear, or accessories industry. You are asked to diagnose a business problem, such as five years of falling revenue at a womenswear brand, run the volume and margin math, and deliver a recommendation. Bain, McKinsey, and BCG all use them.

 

The skills being scored are the same ones every case measures: structure, quantitative accuracy, business judgment, and communication. What changes is the set of questions worth asking. A fashion brand and a software company can both be losing money, but almost none of the useful questions overlap.

 

Fashion sits inside the broader family of industry-specific case interviews, next to healthcare, energy, and financial services. It also overlaps with two neighbors you should not confuse it with.

 

The first is the retail case interview, which can be set in groceries or electronics, where a can of soup holds its value on the shelf indefinitely.

 

Fashion does not work that way. A spring jacket that does not sell by June is worth a fraction of its ticket price, and no amount of merchandising brings that value back. Every distinctive question in a fashion case traces back to that one fact.

 

The other neighbor is the luxury goods case interview, which shares the apparel supply chain but runs on scarcity, brand equity, and pricing power rather than volume and turns. If the prompt names a house like Dior or Hermes, you are in luxury territory. If it names a mall brand, a denim label, or a sportswear company, you are in fashion.

 

What Types of Fashion Case Interviews Will You Get?

 

Six case types cover nearly every fashion prompt you will face. Recognizing the type in the first thirty seconds tells you which branch of your structure will carry the weight, which saves you from building a tree that is balanced but useless.

 

Case type	Typical prompt	What it actually tests
Profitability	A denim brand's profits fell 30% while revenue held flat	Whether you separate price, mix, and volume instead of jumping to costs
Revenue decline	A womenswear retailer has lost sales five years running	Whether you diagnose before prescribing and check the market first
Pricing and markdown	Should the client discount earlier or hold price through the season	Whether you weigh margin per unit against inventory risk
Market entry	Should a European brand enter the US activewear market	Sizing discipline and honest treatment of brand fit
Channel strategy	Should the brand pull back from department stores and grow its own site	Whether you can compare wholesale and direct economics correctly
Brand portfolio	Should a group acquire, reposition, or shut a sub-brand	Judgment on cannibalization and brand equity, not just synergies

 

Profitability and revenue decline are the two you should over-prepare. In my time interviewing at Bain, more consumer cases opened with some version of "profits are down" than every other prompt combined, and the fashion versions almost always hid the answer in product mix rather than in a cost line.

 

The others show up often enough to matter. A pricing case interview set in fashion is really a markdown timing question in disguise, and the strongest candidates say so out loud within the first minute.

 

How Do Fashion Business Models Differ Across Segments?

 

Fashion is not one business model. A fast fashion group, a mid-market chain, an athletic brand, and a luxury house earn money in ways that are different enough to change your entire structure. The table below uses figures each company reported in its most recent full year.

 

Segment	Benchmark company	Reported figures	What the case turns on
Fast fashion	Inditex, FY2025 ended January 2026	Sales of €39.9B, gross margin 58.3%, online €10.7B	Speed of the buy and how little sits unsold at season end
Value and mid-market	H&M Group, FY2025 ended November 2025	Sales of SEK 228.3B, gross margin 53.4%, operating margin 8.1%	Operating leverage and store count, since gross margin barely moves
Athletic and athleisure	Nike, FY2026 ended May 2026	Revenue of $46.4B, gross margin 42.9%, direct sales $17.7B	The split between wholesale and direct, and product innovation cycles
Luxury	LVMH, calendar 2025	Group revenue €80.8B, fashion and leather goods operating margin 35%	Pricing power, desirability, and controlling distribution

 

Read across that table and the pattern is clear. Gross margin rises as you move upmarket, but so does the cost of being wrong, because a luxury house cannot discount its way out of a bad season without damaging the brand it took decades to build.

 

Channel mix is the other line worth memorizing. Nike reported $17.7 billion of direct sales against $46.4 billion of total revenue in fiscal 2026, which puts roughly 38% of the business in its own stores and apps and the rest through wholesale partners. That single ratio changes how you think about margin, data ownership, and who controls the markdown decision.

 

Inditex sits at the other end of the spectrum on inventory. It reported FY2025 sales of 39.9 billion euros with a 58.3% gross margin, which is what a short design-to-shelf cycle buys you. When a brand can react to demand in weeks rather than seasons, it discounts less, and the margin shows it.

 

What Fashion Industry Metrics Do You Need to Know?

 

Eight metrics carry almost every fashion case. You do not need benchmarks memorized for every brand. You need to know which lever each metric sits on, so you can ask the interviewer for the right number instead of guessing at it.

 

• Full-price sell-through: the share of units sold at ticket price before any markdown, and the number that most often explains a fashion margin problem

 

• Markdown rate: the average discount taken across the season, which tells you how much of the gross margin was given away to clear stock

 

• Average selling price: total revenue divided by units sold, which moves when the mix shifts even if no ticket price ever changed

 

• Inventory turns: cost of goods sold divided by average inventory, and a direct read on how much cash is sitting in unsold product

 

• Gross margin: revenue minus product cost, which in fashion is really a scoreboard for how well the buy matched demand

 

• Comparable store sales: growth at stores open at least a year, which strips out the flattering effect of new openings

 

• Return rate: the share of orders sent back, which in online apparel is high enough to swing the profitability of an entire channel

 

• Channel mix: the split between wholesale and direct-to-consumer, which determines both margin per unit and who owns the customer

 

Two of those deserve real numbers. H&M's FY2025 report shows SEK 228.3 billion of sales, SEK 121.8 billion of gross profit, and SEK 35.4 billion of stock at year end, which works out to inventory turning roughly three times a year. Fast fashion competitors run faster, and that gap is where a lot of case answers live.

 

Returns are the other one. The National Retail Federation estimated that 19.3% of online sales were returned in 2025, against 15.8% across all retail channels, and that 9% of all returns were fraudulent. If a case involves an online apparel business and you never ask about returns, you have skipped one of the largest cost lines in the model.

 

Customer economics matter for any brand selling directly. A customer acquisition cost that looked reasonable when paid social was cheap can quietly wreck the unit economics of a direct-to-consumer brand three years later.

 

What Framework Should You Use in a Fashion Case Interview?

 

Build a revenue tree that splits units from price, then split price into full-price and markdown. That one adjustment turns a generic structure into a fashion structure, and it is the fastest way to sound like you have worked in the industry.

 

Here is the sequence I use with candidates:

 

1. Split revenue into units and average selling price: establish which one moved before touching anything else
   
   
2. Break average selling price into full-price and markdown sales: a flat ticket price can still produce a falling average when the mix shifts
   
   
3. Break units into traffic, conversion, and units per transaction: this tells you whether fewer people came or fewer people bought
   
   
4. Test the assortment: ask which categories, price tiers, and sizes drove the change, since fashion declines are rarely spread evenly
   
   
5. Move to cost only after revenue is understood: product cost, markdown, freight, returns, store labor, and occupancy, in that order
   
   
6. Close with a market check: confirm whether the client is losing share or the whole category is shrinking, because the recommendation changes completely

 

Step two is where most candidates lose the case. They see stable prices in the exhibit, conclude that price is not the problem, and spend the rest of the interview in the cost bucket while the real answer sits in the discount mix.

 

The same discipline applies across other structures. Whether you are running a profitability case interview or a market entry problem, the fashion version always needs a branch for inventory risk that a soap or software case would not require.

 

If you want a faster way to get your structures clean, my case interview course walks through the frameworks and math drills that make this second nature in about a week.

 

How Do You Solve Bain's FashionCo Case?

 

FashionCo is a free written case that Bain publishes on its careers site, and it is the single best fashion practice case available because the people who wrote it are the people who will interview you. The client is a women's fashion company whose revenue has fallen every year for five years. The CEO wants a recommendation before a management meeting at the end of the week.

 

Bain's own setup steers you toward three questions: what is driving the decline, what customers actually care about when they buy, and which quantitative and qualitative moves could fix it. That ordering is the lesson. Diagnose the market and the customer first, then generate options, then price them out.

 

The case then narrows to two commercial options and asks which produces more revenue this year. Option A is a rewards program in which a quarter of the ten million customers join, pay a one-time activation fee, and receive a standing discount on their spend. Option B is an intermittent sales strategy that discounts for three months a year and is assumed to double purchase volume during that window.

 

Most candidates rush this math and get it wrong the same way. The trick is to segment before you calculate.

 

• For Option A, treat joiners and non-joiners as two separate populations, apply the discount only to the joiners, and remember that the activation fee is revenue too

 

• For Option B, split the year into the nine months at normal pricing and the three months on promotion, then apply the volume lift and the discount only to that window

 

• State your assumptions out loud before you start, because the interviewer is scoring the setup at least as much as the arithmetic

 

Bain's published answer recommends the intermittent sales option, which the firm projects delivers roughly $50 million more than the rewards program in year one. Bain also makes clear that the stronger answer does not stop at the number.

 

A better response flags that the rewards program may win over a longer horizon if signups grow in year two, and that neither option addresses the underlying question of whether the product itself has fallen out of step with the market. That instinct, finishing with risks and next steps rather than a bare number, is exactly what separates a pass from a strong pass. The same expectation runs through every Bain case interview I ever gave.

 

What Does a Worked Fashion Case Interview Example Look Like?

 

Here is a full example with illustrative numbers, built to look like the mid-market prompts that show up most often. Work it yourself before reading the solution.

 

The prompt

 

Your client is a US womenswear brand selling through its own stores and website. Revenue has been flat at about $540 million for three years, but gross margin has fallen from roughly 56% to 50%. The CEO wants to know why, and what to do about it.

 

The clarifying questions worth asking

 

Ask three, not eight. Has unit volume changed, has the ticket price changed, and has the share of units sold on markdown changed. Those three answers usually crack a fashion margin case on their own.

 

The data

 

The interviewer gives you the following. Ticket price has held at $60, the standard markdown is 40% off, and product cost per unit has held at $24.

 

Measure	Three years ago	Today
Units sold	10.0 million	11.25 million
Sold at full price	75%	50%
Average selling price	$54	$48
Revenue	$540 million	$540 million
Gross profit	$300 million	$270 million

 

The math

 

Three years ago, 75% of units sold at $60 and 25% at $36, giving an average selling price of $54. Against a $24 cost, that is $30 of gross profit per unit, or $300 million on 10 million units.

 

Today the mix is 50-50, which drops the average selling price to $48 and gross profit per unit to $24. On 11.25 million units, that is $270 million. Revenue looks identical, and the brand is $30 million worse off.

 

The insight

 

The brand did not lose customers. It bought volume with discount, and the volume was expensive: 1.25 million extra units moving through stores, warehouses, and returns to produce $30 million less gross profit than before.

 

Now quantify the fix. Every unit shifted from markdown to full price is worth $24 of extra gross profit, so at 11.25 million units, each percentage point of full-price sell-through is worth $2.7 million. Moving the mix from 50% to 65% recovers about $40 million.

 

The recommendation

 

"I recommend the client rebuild full-price sell-through rather than chase units. Moving from 50% to 65% is worth about $40 million in gross profit, and I would get there by cutting the seasonal buy roughly 10%, holding the first markdown two weeks later, and shifting depth toward the categories with the highest full-price rates.

 

The risk is short-term revenue: fewer units at higher prices could show as a comparable sales decline for two or three quarters, so I would set the internal target on gross profit rather than revenue. I would want two more things before committing: sell-through by category and price tier, and a read on whether competitors have moved their own promotional calendars."

 

Notice what that answer does. It leads with the number, names the specific levers, prices the downside, and asks for the two pieces of data that would change the plan. Practicing the delivery matters as much as the arithmetic, which is why 1-on-1 coaching tends to move candidates faster than another fifty solo cases.

 

What Fashion Industry Trends Should You Bring Into the Case?

 

You need three or four current facts, delivered at the right moment, not a lecture. The best time to use one is when the interviewer asks what external factors could explain the client's problem.

 

Growth is slow and executives know it. McKinsey and The Business of Fashion reported in their State of Fashion 2026 survey that 46% of executives expected conditions to worsen in 2026, up from 39% the year before, with tariffs named the number-one hurdle. Only 25% expected improvement.

 

Tariffs matter more here than in most sectors because apparel is sourced globally and produced far from where it is sold. A sourcing shift is not a spreadsheet exercise: moving production between countries takes seasons, not weeks, which is why it shows up in cases as a timing problem rather than a cost problem.

 

Resale has moved from a curiosity to a real channel. The same McKinsey report forecasts the secondhand market growing two to three times faster than the firsthand market through 2027, and found that resale tends to introduce shoppers to brands rather than cannibalize new sales.

 

Two more are worth carrying. More than 35% of fashion executives told McKinsey they already use generative AI in areas such as customer service, image creation, and copywriting, and jewelry is forecast to be the fastest-growing category by unit sales at more than four times the rate of clothing.

 

Environmental rules are tightening on unsold stock in Europe, which turns overbuying from a margin issue into a compliance one. That connection between waste and regulation is why a sustainability case interview and a fashion inventory case increasingly ask the same question from different directions.

 

How Do You Ace a Fashion Case Interview?

 

These five tips come from watching hundreds of candidates work consumer cases, and each one addresses a mistake I saw repeatedly on the other side of the table.

 

Tip #1: Ask about the discount mix before you touch costs

 

If margin is falling and ticket prices have not moved, the answer is almost always in the markdown mix. Ask what share of units sold at full price this year versus two years ago. That one question resolves more fashion cases than any other.

 

Tip #2: Treat inventory as a clock, not a number

 

A grocery chain with too much stock has a working capital problem. A fashion brand with too much stock has a countdown, because every week that passes lowers what the product will eventually sell for. Say that out loud in the case and you will sound like someone who has done the work.

 

Tip #3: Know which channel the client controls

 

Wholesale gives you volume and scale but hands the markdown decision, the customer data, and half the margin to someone else. Direct gives you control and margin but adds store leases, fulfillment, and returns. Establish the split early, because it changes which recommendations are even available.

 

Tip #4: Get the seasonal math right

 

Fashion revenue is not spread evenly across the year, so annual averages mislead. When a case gives you an annual figure and then asks about a three-month window, convert carefully, and say what you are assuming about how the spend is distributed. Careless division here is one of the most common ways candidates lose a case interview math question they could easily have solved.

 

Tip #5: Read one annual report before your interview

 

Pick a brand in the segment your target office serves and read its most recent annual report. You will pick up the vocabulary, the metric names, and a handful of real numbers in about two hours. Candidates who do this ask noticeably better clarifying questions, and interviewers notice.

 

The fastest way to get comfortable with a fashion case interview is to run the FashionCo case cold, then rebuild your structure around units, price, and markdown mix until that split becomes automatic. Do that this week and you will handle any apparel prompt an interviewer sends your way.

 

Frequently Asked Questions

 

What is a fashion case interview?

 

A fashion case interview is a consulting case set in the apparel, footwear, or accessories industry. You diagnose a business problem such as declining revenue, weak full-price sell-through, or a channel decision, then run the volume and margin math and give a recommendation. The skills tested are identical to any other case. The industry context changes which questions are worth asking.

 

Which consulting firms give fashion case interviews?

 

All three MBB firms run apparel and luxury practices, so fashion prompts show up at McKinsey, BCG, and Bain, along with Deloitte, Kearney, OC&C, and other firms with consumer practices. Bain publishes a free fashion case called FashionCo on its careers site. European and Asian offices in cities such as Milan, Paris, and Shanghai see fashion clients more often than most US offices.

 

What is Bain's FashionCo case?

 

FashionCo is a free written practice case on Bain's careers site. The client is a women's fashion company whose revenue has fallen every year for five years, and the CEO wants a recommendation before a management meeting at the end of the week. The case asks you to identify the drivers of the decline, brainstorm ways to grow revenue, then compare a rewards program against an intermittent sales strategy. Bain's published answer recommends the intermittent sales option, which it projects generates about $50 million more.

 

What metrics do you need to know for a fashion case interview?

 

Know full-price sell-through, markdown rate, average selling price, inventory turns, gross margin, comparable store sales, return rate, and channel mix between wholesale and direct-to-consumer. You do not need to memorize benchmarks for every brand. You do need to know which lever each metric sits on so you can ask for the right number instead of guessing.

 

How is a fashion case interview different from a retail case interview?

 

A retail case can involve any category, including groceries, electronics, and home goods, where products hold their value on the shelf. Fashion products lose value on a fixed clock because a spring jacket is worth far less in July than it was in March. That single difference pushes fashion cases toward assortment, markdown timing, and sell-through rather than pure traffic and basket math.

 

Do you need fashion industry experience to pass a fashion case interview?

 

No. Interviewers hire people from engineering, law, medicine, and the sciences into consumer practices every year. What they expect is that you can reason about how a brand makes money, ask for the numbers that matter, and avoid claiming knowledge you do not have. Two hours reading a fashion company's annual report will give you more than enough context.

 

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