Fernhollow Fitness: Profitability Case Study with Answer

Why did a growing boutique fitness chain lose 70% of its operating profit in two years, and should it keep opening new studios? A free medium profitability case study with 6 questions, 3 exhibits and a model answer for every question. About 30 minutes. No login to read.

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Consumer services / Boutique fitness studios · Interviewer-led · McKinsey style

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The case

Our client, Fernhollow Fitness, runs 24 boutique studios offering indoor cycling and reformer pilates across the US Pacific Northwest. Since 2023 it opened 6 new studios and revenue grew from $32.4 million to $36.6 million, but operating profit fell from $5.4 million to $1.6 million. The CEO wants to know why, and whether to go ahead with 6 more openings planned for 2026.

Fernhollow sells monthly memberships, class packs and, since 2022, single visits through two third-party fitness aggregator apps. Every studio has the same format: one room, 25 bikes or reformers, about 64 classes a week, open from 6 a.m. to 9 p.m.

The 18 original studios opened between 2016 and 2021 in dense city neighborhoods. The 6 new studios opened in 2024 and 2025 in newer suburbs. The CEO believes the new studios simply need more time to fill up. The CFO worries that the aggregator apps are eating into the core business. The board has pre-approved 6 more openings for 2026, pending this review.

Interviewer's data, shared if asked
  • Each studio runs about 64 classes a week for 50 weeks, with 25 spots per class: 80,000 bookable spots per studio per year.
  • Membership costs $300 a month and has not changed since 2022. Members average 10 visits a month, so Fernhollow earns about $30 per member visit.
  • Class packs work out to about $40 per class.
  • The aggregator apps pay Fernhollow a flat $10 per visit. Fernhollow decides which classes appear on the apps.
  • Building out a new studio costs about $1.5 million.

Question 1 · Structure

How would you structure your analysis of why Fernhollow's profit fell while revenue grew, and whether it should keep opening studios?

Hint: With 6 new studios, split the problem into the mature studios and the new ones, then break each studio's revenue into visits times revenue per visit.

Model answer

Profit is revenue minus costs, and the studio count jumped from 18 to 24, so I would first look at the economics per studio rather than the chain totals. A studio makes money when visits times revenue per visit beats its mostly fixed costs: rent, instructors who are paid per class whether it is full or not, staff and upkeep.

I would then split the chain into two cohorts: the 18 mature studios, to see whether the core business got worse, and the 6 new studios, to see whether they are on track to pay back. Finally I would check central costs (marketing and head office) and use what I find to judge the 2026 openings.

  • Revenue per studio: visits (bookable spots x fill rate) x revenue per visit, split by channel (memberships, class packs, aggregator apps).
  • Costs per studio: instructor pay, studio staff, rent and occupancy, other studio costs, mostly fixed per class or per site.
  • Central costs: marketing (including launch promotions) and head-office overhead.
  • Hypotheses to test: new studios still ramping (CEO); aggregator apps diluting revenue per visit at mature studios (CFO).
  • Expansion decision: break-even fill for a new studio, and whether the new cohort is on a path to reach it.

What the interviewer is looking for

  • Good: a revenue and cost split specific to a fitness studio (spots, fill, price per visit, fixed costs per site), not a generic profitability tree.
  • Strong: separates mature studios from new ones so that growth does not hide a problem in the core.
  • Excellent: turns the CEO's and CFO's views into testable hypotheses and links the analysis back to the 2026 openings decision.

Push-back: Fixed costs are fixed. Why not just look at revenue and stop there?

Question 2 · Math

Using Exhibit A, how much operating margin did Fernhollow lose, and is this a cost problem or a revenue problem?

Exhibit A: Fernhollow Fitness P&L, 2023 vs 2025
Exhibit A: Fernhollow Fitness P&L, 2023 vs 2025
Line2023 ($M)2025 ($M)
Revenue32.436.6
Instructor pay5.87.7
Studio staff4.35.8
Rent and occupancy8.611.5
Other studio costs2.93.8
Marketing1.82.6
Head-office overhead3.63.6
Operating profit5.41.6
Number of studios18.024.0

$ millions except number of studios. Studio costs are instructor pay, studio staff, rent and other studio costs.

Interviewer's data, shared if asked
  • Instructor pay has been $100 per class since 2023, and rents on the original studios have been flat under long leases.
  • Marketing rose mainly because of launch promotions for the new studios.

Hint: Compute the margin in both years, then divide revenue and studio costs by the number of studios.

Model answer

Operating margin fell from 16.7% (5.4 / 32.4) to 4.4% (1.6 / 36.6), a loss of about 12.3 points. Every studio cost line rose as a share of revenue, with rent (+4.9 points) and instructor pay (+3.1 points) the largest, which looks like a cost problem at first sight.

Per studio it is the opposite. Studio costs were $1.2 million per studio in both years ($21.6 million / 18 and $28.8 million / 24), but revenue per studio fell 15% from $1.8 million to about $1.53 million. Costs did not rise; revenue per studio fell, so the same fixed costs eat a bigger share. Marketing added another 1.5 points, and head-office overhead stayed flat in dollars.

Model answer for question 2
Line2023 % of revenue2025 % of revenueChange (points)
Rent and occupancy26.5%31.4%+4.9
Instructor pay17.9%21.0%+3.1
Studio staff13.3%15.8%+2.6
Marketing5.6%7.1%+1.5
Other studio costs9.0%10.4%+1.4
Head-office overhead11.1%9.8%-1.3
Operating margin16.7%4.4%-12.3

Changes computed before rounding the shares.

What the interviewer is looking for

  • Good: computes both margins correctly and states the drop of about 12 points.
  • Strong: normalizes by studio count and sees that studio costs per studio are flat at $1.2 million.
  • Excellent: reframes the case as a revenue-per-studio problem before the interviewer does, and asks how that splits between mature and new studios.

Push-back: Rent went up by $2.9 million. How can you tell me this is not a cost problem?

Question 3 · Exhibit

Here is Exhibit B. What does it tell you about the CEO's and the CFO's theories? Walk me from $5.4 million of profit to $1.6 million.

Exhibit B: Studio economics by cohort, per studio per year
Exhibit B: Studio economics by cohort, per studio per year
MetricMature studios 2023 (18)Mature studios 2025 (18)New studios 2025 (6)
Bookable spots (thousands)80.080.080.0
Visits (thousands)60.068.040.0
Revenue per visit ($)30.025.025.0
Studio costs ($M)1.21.21.2

Averages per studio. Studio costs exclude marketing and head-office overhead.

Interviewer's data, shared if asked
  • Four of the new studios opened in early 2024 and two in early 2025.
  • When the 18 mature studios opened, they averaged about 65% fill in their first full year.

Hint: For each column compute fill (visits / spots), revenue (visits x revenue per visit) and contribution (revenue minus studio costs), then multiply by the number of studios.

Model answer

Both theories hold, but the CFO's is the bigger one. At mature studios, fill actually rose from 75% to 85%, yet revenue per visit fell from $30 to $25, so revenue per studio fell from $1.8 million to $1.7 million and contribution from $0.6 million to $0.5 million. Across 18 studios that is $1.8 million of lost profit inside the core business.

The new studios are only 50% full. At $25 per visit they bring in $1.0 million against $1.2 million of costs, so each loses $0.2 million, or $1.2 million for the six. That is well behind the roughly 65% fill the mature studios reached in their first year, so time alone may not fix it. Add $0.8 million of extra marketing and the bridge closes: $5.4 million minus $1.8 million, $1.2 million and $0.8 million leaves $1.6 million.

Model answer for question 3
Per studioMature 2023Mature 2025New 2025
Fill rate75%85%50%
Revenue ($M)1.81.71.0
Contribution ($M)0.60.5-0.2
Cohort contribution ($M)10.89.0-1.2

What the interviewer is looking for

  • Good: computes fill, revenue and contribution for each column correctly.
  • Strong: builds a profit bridge that ties exactly to Exhibit A and sizes each driver ($1.8 million, $1.2 million, $0.8 million).
  • Excellent: spots the paradox that mature studios are fuller but earn less, and questions the CEO's 'just wait' view using the 65% first-year benchmark.

Push-back: Mature studios are fuller than ever. Isn't that a sign the core business is healthy?

Question 4 · Math

Exhibit C shows the channel mix at the mature studios. Why did revenue per visit fall from $30 to $25, and what did the shift cost each studio?

Exhibit C: Visit mix by channel at the 18 mature studios
Exhibit C: Visit mix by channel at the 18 mature studios
ChannelRevenue per visit ($)2023 share of visits2025 share of visits
Memberships3070%45%
Class packs4020%20%
Aggregator apps1010%35%

Revenue per visit is what Fernhollow receives, unchanged from 2023 to 2025.

Interviewer's data, shared if asked
  • Average members per mature studio fell from 350 in 2023 to 255 in 2025.
  • Exit surveys show about a third of members who cancelled still come to Fernhollow through an aggregator app.

Hint: Compute the blended revenue per visit in each year, then turn the shares into visits per channel using 60,000 and 68,000 visits per studio.

Model answer

The blended revenue per visit is 70% x $30 + 20% x $40 + 10% x $10 = $30 in 2023, and 45% x $30 + 20% x $40 + 35% x $10 = $25 in 2025. Prices did not change; the mix did. App visits pay a third of a member visit.

In visits per studio: member visits fell from 42,000 to 30,600 (minus 11,400, worth $342,000), class-pack visits rose from 12,000 to 13,600 (plus $64,000) and app visits rose from 6,000 to 23,800 (plus 17,800 visits, but only $178,000). Net, each mature studio lost about $100,000 a year even though it served 8,000 more visits. Member numbers fell from 350 to 255 per studio, and exit surveys suggest some members simply switched to the cheaper app route: the apps are cannibalizing memberships, not just filling empty spots.

Model answer for question 4
Channel2023 visits2025 visitsRevenue change ($)
Memberships42,00030,600-342,000
Class packs12,00013,600+64,000
Aggregator apps6,00023,800+178,000
Total60,00068,000-100,000

What the interviewer is looking for

  • Good: computes the blended $30 and $25 correctly and says the mix, not price, drove the drop.
  • Strong: converts shares into visits and shows that 17,800 extra app visits did not make up for 11,400 lost member visits.
  • Excellent: uses the member count and exit surveys to argue cannibalization, and notes that Fernhollow controls which classes appear on the apps, so the lever is in its own hands.

Push-back: The apps brought 17,800 extra visits per studio. Wouldn't those studios be emptier without them?

Question 5 · Math

The COO has two proposals for 2026. First, take peak-hour classes off the apps at the 18 mature studios. Second, a local marketing push at the 6 new studios. What fill does a new studio need to break even, and what would the two moves add to profit?

Interviewer's data, shared if asked
  • In a two-studio pilot, removing peak classes from the apps cut app visits by 12,000 per studio a year. Half of those visits came back as member or class-pack visits at an average of $32; the other half were lost.
  • Taking classes off the apps does not change studio costs: the same classes still run.
  • The marketing push costs $0.1 million per new studio per year. The COO expects it to lift new studios to 65% fill, in line with the mature studios' first year.
  • Revenue per visit at the new studios stays at $25.

Hint: Break-even visits = studio costs / revenue per visit. For the app move, net the lost app revenue against the visits that come back at a higher price.

Model answer

Break-even: a new studio needs $1.2 million / $25 = 48,000 visits a year, or 60% fill. Today it runs at 50%. With the marketing push it also has to cover $0.1 million more, so break-even rises to 52,000 visits, which is exactly the 65% fill the COO expects. In other words, the push at best brings each new studio from a $0.2 million loss to break-even: worth $1.2 million for the six.

App move: each mature studio gives up 12,000 app visits at $10 ($120,000) and wins back 6,000 visits at $32 ($192,000), a gain of $72,000 per studio with no extra cost. Across 18 studios that is about $1.3 million.

Together the two moves add about $2.5 million, taking operating profit from $1.6 million to about $4.1 million, still below the $5.4 million of 2023.

What the interviewer is looking for

  • Good: gets the 60% break-even fill and about $1.3 million from the app move.
  • Strong: includes the cost of the push and sees that 65% fill only gets the new studios to break-even, not to a profit.
  • Excellent: concludes that new studios in this format need well above 65% fill to earn back a $1.5 million build-out, which undermines the case for 6 more openings now.

Push-back: What if only a quarter of the lost app visits come back instead of half?

Question 6 · Synthesis

The CEO has two minutes before the board meeting. What do you recommend?

Hint: Answer first (fix the core, pause the openings), then the two drivers with numbers, then the value of the moves, risks and next steps.

Model answer

Pause the 6 openings planned for 2026 and fix the existing studios first. Profit fell from $5.4 million to $1.6 million for two reasons. First, aggregator apps cannibalized memberships at the mature studios: revenue per visit fell from $30 to $25, costing $1.8 million. Second, the 6 new studios are only half full and lose $0.2 million each, $1.2 million in total, with $0.8 million of launch marketing on top.

Taking peak classes off the apps adds about $1.3 million, and a marketing push that lifts new studios to 65% fill brings them to break-even, adding $1.2 million. That takes profit to about $4.1 million. The main risks are that fewer app users come back as members and that the new suburbs never reach 65%; we should test the app change in a few studios for one quarter and set 65% fill as the bar before any new opening is approved.

What the interviewer is looking for

  • Good: gives a clear answer on both the profit drop and the 2026 openings.
  • Strong: quantifies both drivers and both levers with numbers that tie to the analysis.
  • Excellent: makes the expansion decision conditional on a measurable trigger (65% fill) and names what would change the recommendation.

Model recommendation

Show the recommendation

Pause the 6 studio openings planned for 2026 and fix the existing 24 studios first.

Operating profit fell from $5.4 million to $1.6 million because aggregator apps diluted revenue per visit at mature studios from $30 to $25 (minus $1.8 million), the 6 new studios run at 50% fill and lose $0.2 million each (minus $1.2 million), and launch marketing added $0.8 million.

Taking peak classes off the apps adds about $1.3 million a year, and a marketing push that lifts new studios to the 65% fill they need to break even adds $1.2 million, taking profit back to about $4.1 million.

Next steps: test the app change in a few studios for one quarter, track fill and member count by studio every month, and approve new openings only once the current new studios hold 65% fill or better.

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Written by Road to Offer. Updated November 6, 2026. Every client and number in this case is made up for practice.