Author: Taylor Warfield, Former Bain Manager and interviewer

Last Updated: October 7, 2026

 

A restaurant case interview is a consulting case set in the restaurant industry, where you diagnose a problem such as falling profits, a new location decision, or a pricing change using the industry's own revenue and cost drivers. This guide gives you the restaurant economics interviewers expect you to know, two fully worked cases, and the errors that separate a passable structure from a great one.

 

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Key Takeaways

 

Restaurant cases reward candidates who translate the generic profit equation into restaurant drivers: covers, average check, food cost, labor cost, and occupancy.

 

• Food and labor each absorb roughly a third of every sales dollar, leaving a typical restaurant near a 5% pre-tax margin

 

• Build revenue from seats, table turns, and average check instead of a vague price times quantity

 

• Split any sales change into traffic and average check before you touch the cost side

 

• Third-party delivery commissions of 15% to 30% can erase the margin on an otherwise healthy order

 

• Franchised and company-owned units have completely different economics, so ask which one the client runs

 

• New location decisions turn on cannibalization and payback period, not on projected sales alone

 

What Is a Restaurant Case Interview?

 

A restaurant case interview is a consulting case interview in which the client operates in the restaurant industry. You are typically asked to fix declining profits, evaluate a new location, set menu prices, improve kitchen throughput, or size a market. Interviewers use restaurants because the business model is intuitive and the math stays clean.

 

The case itself follows the same shape as any other case: a prompt, clarifying questions, a structure, quantitative work, a brainstorm, and a recommendation. What changes is the vocabulary. A strong candidate stops saying "units sold" and starts saying "covers," "average check," and "table turns" within the first two minutes.

 

Restaurants show up across every firm and every round. Because they sit inside the consumer and retail practice, they behave like any other industry-specific case interview, where the framework is standard but the drivers are not.

 

Why Do Consulting Firms Use Restaurant Cases So Often?

 

Firms use restaurant cases because the industry is enormous, genuinely troubled, and easy to explain in one sentence. The National Restaurant Association projects total restaurant and foodservice sales of $1.55 trillion in 2026, with industry employment reaching 15.8 million jobs.

 

The trouble is what makes it a good case. In the same 2026 report, 42% of operators said their restaurant was not profitable in 2025, and 60% reported softer customer traffic. That is a real consulting problem, not a hypothetical one.

 

There are three reasons interviewers reach for restaurants specifically. Every candidate has been inside one, so nobody is disadvantaged by industry knowledge. The cost structure is simple enough to hold in your head and specific enough to reward candidates who prepared.

 

In my experience at Bain, restaurant prompts also worked well because they scale in difficulty without changing the setup. The same client can support a two-minute market sizing warm-up or a full 40-minute profitability case with a chart and a recommendation.

 

What Restaurant Economics Do You Need to Know Before Your Interview?

 

You need four numbers: food is about a third of sales, labor is about a third of sales, other operating costs are about 29%, and pre-tax profit is about 5%. Those figures come from the National Restaurant Association's breakdown of a typical independent restaurant before the pandemic. Knowing them means you can spot an abnormal cost line the moment the interviewer hands you data.

 

Cost line	Share of sales	What to probe in the case
Food and beverage	About 33%	Ingredient inflation, portion sizes, waste, menu mix, supplier contracts
Labor	About 33%	Wage rates, hours scheduled, turnover, manager pay, overtime
Occupancy and other operating costs	About 29%	Rent, utilities, insurance, repairs, card processing fees, marketing
Pre-tax profit	About 5%	How little room the client has before a cost increase erases the whole margin

 

Source: National Restaurant Association cost breakdown for a typical independent restaurant.

 

Food and labor together are called prime cost, and they run near two-thirds of sales. That single idea explains why restaurants are so fragile. A five point swing in prime cost wipes out the entire pre-tax margin, which is why understanding fixed and variable costs matters more here than in almost any other industry.

 

Costs have moved sharply. The National Restaurant Association estimates that food costs and labor costs each rose about 35% since 2019. Menu prices rose roughly 36% between February 2020 and May 2026 to cover it, which is exactly why traffic has been soft.

 

What is the difference between four-wall margin and net margin?

 

Four-wall margin, also called restaurant-level operating margin, is store revenue minus food, labor, occupancy, and other store costs. It excludes corporate overhead, depreciation, and pre-opening costs, so it is always much higher than net margin. Mixing the two up is the fastest way to lose credibility in a restaurant case.

 

Chipotle makes the gap concrete. In its full year 2025 results, the company reported a restaurant-level operating margin of 25.4% on $11.9 billion of revenue, but a net income margin of 12.9%. Food, beverage, and packaging ran 29.6% of revenue and labor ran 25.1%.

 

Chipotle also shows why you must split sales into traffic and check. Full year comparable sales fell 1.7%, but that was transactions down 2.9% partly offset by average check up 1.2%. A candidate who only reports the 1.7% has missed the actual story.

 

Why does franchising change the entire case?

 

A franchisor and a restaurant operator are different businesses wearing the same brand. The franchisor collects royalties and rent on somebody else's sales, so its margins look nothing like a store P&L. Ask which one your client is before you build any structure.

 

McDonald's is the clearest example. Its 2025 Form 10-K reports 45,356 restaurants worldwide, about 95% of them franchised, producing $139.4 billion of systemwide sales but only $26.9 billion of company revenue. Its operating margin was 46.1%, roughly nine times what a typical independent restaurant earns pre-tax.

 

What Are the Most Common Types of Restaurant Case Interviews?

 

Seven case types cover almost everything you will see. Profitability declines are by far the most common, followed by new location decisions and pricing questions.

 

Case type	Typical prompt	What the interviewer is testing
Profitability decline	A chain's profits fell from $50M to $35M over two years	Whether you isolate the driver before recommending anything
New location decision	Should the client open a store in a new suburb	Payback math and whether you catch cannibalization
Menu pricing	Should the client raise prices 5% across the menu	Price elasticity and the traffic tradeoff
Operations and throughput	Drive-thru times have slipped by 40 seconds	Bottleneck logic and capacity math
Delivery channel	Should the client stay on third-party delivery apps	Channel-level margin instead of top-line thinking
Acquisition screening	Should a fund buy a 40-unit regional chain	Unit economics, growth runway, and diligence priorities
Market sizing	How large is the burger market in this city	Clean assumptions and a sanity check at the end

 

Each of these maps to a case type you have already practiced. A new location prompt is a market entry case interview with a real estate decision bolted on, and a menu question is a standard pricing problem with a mix effect.

 

The delivery channel case deserves special attention because it is new and it trips people up. DoorDash publishes its merchant rates openly: 15%, 25%, or 30% commission on delivery orders depending on the plan, and 6% on pickup. On a restaurant carrying a 5% pre-tax margin, a 25% commission turns a profitable order into a loss unless prices or costs change.

 

That is why smart operators treat delivery as a separate profit and loss statement rather than incremental revenue. In a case, the right move is to compute the contribution margin on a delivery order and compare it to a dine-in order side by side.

 

How Do You Structure a Restaurant Profitability Case?

 

Start with profit equals revenue minus costs, then rebuild both sides with restaurant-specific drivers before you ask for any data. This takes about 60 seconds and it is the single highest return habit in a restaurant case. Interviewers can tell immediately whether your structure was built for this client or pulled off a shelf.

 

Here is the sequence that works.

 

1. Quantify the problem: ask how much profit fell, over what period, and whether it is a dollar or margin decline
   
   
2. Split revenue from costs: find out which side moved before building any issue tree deeper
   
   
3. Break the moving side into drivers: revenue into locations, covers, and check, or costs into food, labor, occupancy, and other
   
   
4. Isolate the driver: keep narrowing until one line item explains most of the gap
   
   
5. Ask why that driver moved: the number tells you where, the qualitative discussion tells you why

 

Your revenue tree should read like a restaurant operator wrote it. For a full service concept, revenue equals seats times table turns per day times average check times days open. For a quick service concept, swap seats and turns for transactions per day.

 

The cost tree is simpler because the industry uses four standard buckets: food and beverage, labor, occupancy, and other operating costs. Keeping those four separate is what makes your structure MECE without any effort on your part.

 

Notice that this is the standard profitability case interview logic with restaurant vocabulary layered on top. You are not learning a new method, you are learning which nouns to use.

 

If you want to learn case structuring quickly, my case interview course walks you through proven approaches in as little as 7 days.

 

Worked Example: Why Are a Fast Casual Chain's Profits Falling?

 

Every number below is illustrative and chosen to keep the arithmetic clean. Work through it out loud before reading the answer.

 

Interviewer: Your client is a fast casual chain with 200 locations in the United States. Profits have fallen from $50M to $35M over two years. What is going on and what should they do?

 

You: Before I structure this, three quick questions. Has the store count changed over those two years, is the decline in dollars or in margin percentage, and is this concentrated in certain markets or across the whole fleet?

 

Interviewer: Store count is flat at 200. Revenue has held steady at $500M, so average unit volume is $2.5M. The decline is fleet-wide.

 

Revenue flat with profit down $15M means the entire problem sits on the cost side. That is worth saying out loud, because it lets you drop the revenue branch and spend your remaining time where the answer actually is.

 

Suppose the interviewer then gives you the cost lines as a share of revenue. Food moved from 29% to 30.5% and labor moved from 25% to 26.5%. Both increases are worth $7.5M on a $500M base, which accounts for the full $15M gap.

 

Now go one level deeper on each. Ask whether food cost rose because of ingredient inflation, portion changes, waste, or menu mix, and whether labor rose because of wage rates, hours, or turnover. Clean case interview math gets you to the right branch, but the diagnosis is what earns the offer.

 

There is a trap here worth catching. Revenue was flat, but ask how it stayed flat: if transactions fell 6% and average check rose 6%, the chain is quietly losing customers while raising prices. That is a much worse story than flat revenue suggests.

 

Sample recommendation: The chain should protect margin by renegotiating its top five ingredient contracts and re-engineering the menu toward higher margin items, while testing labor scheduling against actual traffic patterns. Both moves attack the $15M cost increase directly. The risk is that further price increases accelerate the traffic loss, so I would validate elasticity before raising menu prices again.

 

Worked Example: Should the Client Open a New Restaurant Location?

 

New location cases look like simple math and then punish you for skipping one adjustment. The adjustment is cannibalization.

 

Let's say the client can build a new store for $1.5M. The site is projected to do $2.4M in first-year sales at a 20% four-wall margin, which is $480K of annual store profit. On those numbers alone, payback looks like 3.1 years.

 

Now add the piece most candidates miss. If 20% of the new store's sales come from an existing location three miles away, that existing store loses $480K of revenue and $96K of profit at the same 20% margin.

 

Incremental profit is therefore $480K minus $96K, or $384K. Payback becomes $1.5M divided by $384K, which is 3.9 years rather than 3.1. If the client's hurdle is a three-year payback, this site fails, and the answer flips on a number the prompt never mentioned.

 

Then pressure test it. At 10% cannibalization, incremental profit rises to $432K and payback falls to 3.5 years, still short of the hurdle. Running that sensitivity out loud is how you show the interviewer you understand what actually drives the decision.

 

The same logic powers restaurant breakeven analysis questions. Instead of asking when the store pays back, the interviewer asks how many covers per day the store needs to cover its fixed costs.

 

One more thing to raise: a new store also carries pre-opening costs, a ramp period before it reaches mature volume, and a lease term that may run 10 or 20 years. Naming those without being asked signals real commercial judgment.

 

How Do You Answer a Restaurant Market Sizing Question?

 

Build the estimate from population and visit frequency, then cross-check it from the supply side. The second step is what separates a good answer from an average one, and almost nobody does it.

 

Suppose you are asked to size the annual burger quick service market in a city of one million people. Assume the average resident makes four quick service visits per month, or 48 per year, and that roughly a third of those go to burger chains. That is 16 burger visits per person per year.

 

Sixteen visits times one million people gives 16 million transactions. At a $10 average ticket, the market is $160M per year. State the answer, then immediately test it.

 

The supply-side check works like this. If a typical burger quick service restaurant does $2.5M in annual sales, a $160M market supports 64 locations, or about one per 15,600 residents. That feels right for a US city, so the estimate holds.

 

Restaurants are one of the best settings for market sizing precisely because this cross-check exists. You can always convert a dollar market back into store counts and ask whether that number passes the smell test.

 

What Restaurant Metrics Should You Know for Your Case Interview?

 

Eight metrics cover nearly every restaurant case. Learn what each one means and, more importantly, which question it answers.

 

Metric	What it means	How it shows up in a case
Average unit volume	Annual sales at a typical single location	Sizing a chain, or comparing a new store to the fleet average
Comparable sales	Sales growth at stores open at least a year	Separating real performance from growth by opening new units
Traffic and average check	The two components of comparable sales	The first split you should make in any revenue decline
Prime cost	Food plus labor as a share of sales	A single number that tells you whether the kitchen is healthy
Four-wall margin	Store profit before corporate overhead	Judging whether individual locations work before blaming headquarters
Table turns	How many times a seat is sold per day	Capacity questions in full service restaurants
Unit payback period	Build cost divided by annual store profit	The go or no-go test for new location cases
Cannibalization	Sales a new store steals from nearby existing stores	The adjustment most candidates forget in expansion cases

 

Prime cost is the one to memorize. If the interviewer says food is 31% and labor is 32%, you should immediately know prime cost is 63% and that the client is running slightly hot against a two-thirds benchmark.

 

These metrics also carry across neighboring industries. The same unit economics logic applies whether the four walls contain a kitchen, a store, or a hotel room.

 

What Tips Help You Stand Out in a Restaurant Case Interview?

 

The following six habits are the ones I saw separate strong candidates from average ones during interviews at Bain. None of them require extra knowledge, only discipline.

 

Tip #1: Ask which restaurant segment the client operates in

 

Quick service, fast casual, casual dining, and fine dining have different check sizes, labor models, and margins. A $12 average check and a $90 average check lead to completely different recommendations. Ask in your first round of clarifying questions.

 

Tip #2: Split any sales change into traffic and average check

 

Comparable sales is a blended number that hides the real story. Rising check with falling traffic means the client is pricing its way out of a volume problem, which works right up until it does not. Make this split every single time.

 

Tip #3: Separate fixed labor from variable labor

 

A general manager's salary does not change when the dining room is half empty, but hourly crew hours should. Candidates who treat all labor as variable miss the deleveraging effect that explains most margin declines when traffic slips.

 

Tip #4: Treat delivery as its own profit and loss statement

 

A delivery order and a dine-in order have different revenue net of commission, different packaging cost, and different labor intensity. Blending them together hides whether the channel is helping or quietly destroying margin.

 

Tip #5: Confirm whether the units are franchised or company-owned

 

If the client is a franchisor, your levers are royalties, franchisee profitability, and unit growth. If the client operates its own stores, your levers are food, labor, and occupancy. The wrong assumption here invalidates your entire structure.

 

Tip #6: Sanity check every number against a restaurant you know

 

If your math implies a 40-seat restaurant serving 900 people a day, something is wrong. Saying "that seems high, let me revisit my turns assumption" is a strength, not a weakness. Interviewers notice self-correction more than they notice speed.

 

If you want feedback on how you actually perform under pressure, my interview coaching gives you live practice with a former Bain interviewer.

 

What Mistakes Do Candidates Make in Restaurant Case Interviews?

 

Five mistakes account for most weak performances. All five are avoidable with preparation rather than talent.

 

• Using a generic profit tree: saying "price times quantity" instead of "covers times average check" signals you did not prepare for this industry

 

• Ignoring cannibalization: new location cases are often designed so the recommendation flips once you account for lost sales at nearby stores

 

• Confusing four-wall margin with net margin: a 20% store margin and a 5% company margin can describe the same business

 

• Recommending price increases reflexively: menu prices already rose about 36% between February 2020 and May 2026, and traffic has been soft as a result

 

• Skipping the qualitative why: finding that food cost rose 1.5 points is halfway, and the offer goes to whoever explains the cause

 

The fix for all five is repetition on realistic prompts. Working through case interview examples until the restaurant vocabulary feels automatic is worth far more than reading another framework guide.

 

It also helps to practice adjacent industries, since interviewers rarely tell you the sector in advance. A hospitality case interview uses nearly identical capacity and occupancy logic, so the reps carry over.

 

Master the restaurant case interview by learning the four cost buckets, building revenue from covers and check, and splitting every sales number into traffic and price. Do that consistently and you will out-structure most of the room before you touch a single calculation. The one action to take today is to solve one restaurant profitability case out loud, start to finish, without looking at a framework.

 

Frequently Asked Questions

 

What is a restaurant case interview?

 

A restaurant case interview is a consulting case interview where the client operates in the restaurant industry. Common prompts include a profit decline at a chain, a decision about opening a new location, a menu pricing question, or a kitchen throughput problem. Interviewers use restaurant cases because the business model is intuitive and the math stays clean, which lets them focus on how you think rather than what you already know.

 

Which framework should you use for a restaurant case interview?

 

Start with the profit equation and then rebuild it with restaurant drivers. Revenue becomes locations times covers per location times average check, and costs split into food, labor, occupancy, and other operating expenses. Avoid pulling a memorized framework off the shelf, because interviewers can tell within 30 seconds whether your structure was built for this client or copied from a template.

 

What profit margin does a restaurant make?

 

A typical restaurant ran a pre-tax profit margin of roughly 5% before the pandemic, according to the National Restaurant Association. Margins have been squeezed since then, and 42% of operators reported that their restaurant was not profitable in 2025. Public chains report a different and much higher number called restaurant-level operating margin, which excludes corporate overhead, so always confirm which margin the interviewer means.

 

How do you calculate revenue for a restaurant in a case interview?

 

For a full service restaurant, multiply seats by table turns per day by average check by days open per year. For a quick service or fast casual restaurant, multiply transactions per day by average ticket by days open. Then multiply by the number of locations to get chain revenue. Building revenue this way gives you five separate levers to test instead of one vague price times quantity.

 

Are restaurant cases harder than other case interviews?

 

Restaurant cases are not harder, but they punish shallow structures more than most industries. The business is familiar enough that a generic answer sounds obviously thin, and the cost lines are specific enough that interviewers expect you to name them. Candidates who know that food and labor each absorb roughly a third of every sales dollar start two steps ahead.

 

How do you practice restaurant case interviews?

 

Pick three restaurant scenarios and solve each one out loud in 30 to 45 minutes: a profit decline at a fast casual chain, a new location decision, and a delivery channel question. Build the revenue tree before you ask for a single data point, and force yourself to split comparable sales into traffic and average check every time. Practicing with a partner who pushes back on your assumptions is worth more than reading another framework.

 

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