Consulting interviews

What the job is, and why the interview looks like this

The Occupational Outlook Handbook is blunt about the work: “Management analysts recommend ways to improve an organization’s efficiency”, and the occupation is one “often called management consultants”. The duties it lists are the interview in miniature: gather and organise information about the problems to be solved, interview personnel and conduct onsite observations, analyse financial and other data, develop solutions or alternative practices, and recommend new systems, procedures or organisational changes.

That is why cases exist. A case interview compresses a piece of client work into 30 minutes to see whether you can define the problem, pick the data that matters and commit to a recommendation. The handbook also notes that “most work as consultants on a contractual basis”, which explains the second theme of the interview: can you be put in front of a client next month.

The practical side gets tested too. The UK National Careers Service describes a management consultant’s work as speaking “to staff, managers and customers to understand issues”, collecting and analysing data “to pinpoint areas for improvement”, preparing “reports and present recommendations to the client” and supporting businesses “as they put plans into action”. It also says plainly: “You’ll travel often and may spend nights away from home.” Expect a question about that, and answer it honestly rather than enthusiastically.

On credentials, the handbook notes that analysts “are not required to get certification, but having a credential may give jobseekers a competitive advantage”. For graduate entry, no certificate is expected.

The stages of a consulting recruitment process

Processes vary by firm and country, but the shape is consistent. A CV and cover letter screen, often with a numerical or situational online assessment. A first round of one or two interviews, each mixing a short fit conversation with a case. A final round with senior consultants, partners or directors, usually more cases, sometimes a written case or a group exercise. Offers often follow within days of the final round.

MIT’s career office states the obvious but important thing: “Case interviews are a common part of the process when interviewing for consulting positions.” If your process has no case, check what replaces it. In specialist and implementation firms it is often a technical interview or a presentation on your own past work.

Two stage-specific points are worth knowing. In the written case, the scoring is as much about prioritisation as analysis: you will be given more material than you can read, so decide early what question you are answering. In the group exercise, the assessors are watching whether you build on other candidates’ points, not whether you dominate.

The final round is different in kind. Senior interviewers test commercial instinct and whether a client would take advice from you. Expect looser cases, more challenge to your numbers, and questions about your motivation that assume you have already told the recruiter the polished version.

Fit questions for consultants

The fit questions repeat across firms: why consulting, why us, what would you do if you disagreed with a client, tell me about a time you persuaded someone without authority, describe working with incomplete information, tell me about a team conflict, and what will you do if you do not enjoy the travel.

For why consulting, give two reasons with evidence behind them: the variety of problems with an example of a time you learned a new domain quickly, and the client-facing work with an example of your own. Avoid phrases about steep learning curves and smart colleagues, which every candidate uses.

For why this firm, use what the firm publishes about itself: its practice areas, the sectors it says it serves, the type of work its public case studies describe, and anything you learned from people you spoke to. Specific and modest beats flattering and vague.

The behavioral answers should be short and structured, since the interviewer has a case to get to. Keep setup to two sentences and spend the time on what you did.

Interviewer: Tell me about a time you changed someone’s mind without any authority over them.

Candidate: On a student consulting project for a small retailer, the owner wanted us to recommend opening a second shop.

I led the analysis and had to present the finding, which did not support that.

Instead of opening with the disagreement, I asked what the second shop was meant to achieve and heard that the real goal was weekday revenue. I rebuilt the model around that goal, showed the cost of a second site next to two cheaper options, and used her own footfall data rather than ours so the numbers were hard to dismiss.

She chose a weekday catering offer, which was running within a month, and asked us back for a second project. What made it work was asking about the goal before arguing about the conclusion.

The main consulting case types

Most cases you meet in practice fall into a handful of families. Profitability cases ask why profit fell and what to do. Market entry cases ask whether a client should move into a new country, segment or product. Market sizing cases ask you to estimate a quantity from a few assumptions. Cost reduction cases ask where cost can come out without damaging the business. Growth cases ask how to increase revenue with the assets the client has. Acquisition and due-diligence cases ask whether the target is worth the price. Operations cases ask why a process is slow, expensive or inconsistent.

The type matters less than the habit. Confirm the objective, restate the problem in a form you can decompose, lay out your structure before you dive in, pick the branch that is most likely to hold the answer, do the arithmetic out loud, and end with a recommendation plus the risk you would monitor.

Interviewer: A regional bakery chain has seen profit fall for two years while sales are flat. What would you look at?

Candidate: To confirm the goal: we want profit back to its earlier level within about a year, and closing stores is off the table unless nothing else works.

Profit is revenue minus cost. Sales are flat, so the fall is either cost rising or revenue mix shifting at the same volume, and I would check both.

On cost I would separate variable items, ingredients, packaging and labour hours per store, from fixed ones such as rent and utilities, and I would look at waste separately because bakery waste scales with forecasting quality.

On revenue I would check average price per item, the mix between high and low margin lines, and how much discounting has grown.

My first hypothesis is input cost and waste. Could I see cost per store for the last three years?

For the full method, including how to handle the maths and the final synthesis, use the case interview page. The page on the large strategy firms covers how their rounds differ.

What differs outside the large strategy firms

The strategy firms set the template, but most consulting jobs are elsewhere, and their interviews are not identical.

At the large accounting and advisory firms, the process usually includes competency interviews scored against a published framework, so prepare structured examples for teamwork, client focus and resilience alongside the case. Technology and implementation practices add questions about delivery: how you handled a slipping workstream, how you worked with a client’s own staff, and what you did when the solution you were told to implement was wrong for the client.

Boutique and specialist firms interview more narrowly. A restructuring, economic, pricing, pharma or public-sector practice will test the sector and often the technical skill directly, with a case drawn from its actual work. Here, reading the firm’s published insight pieces pays off, because the case may be a sanitised version of one of them.

Smaller firms also ask the practical questions larger ones leave to HR: how quickly you could start, whether you can travel this quarter, how comfortable you are writing client-ready material unsupervised, and sometimes how you would handle a client relationship on your own. Say what you can actually do.

Internal strategy, transformation and business improvement teams run a quieter version of the same interview. The case is usually about their own organisation, and the fit question becomes why you want to go deep on one business rather than across many.

When "consultant" is not a management consultant

Many jobs titled consultant have nothing to do with cases, and preparing for the wrong interview is a real risk. Leasing consultant, sales consultant, IT consultant, recruitment consultant and retail or beauty consultant roles are customer-facing jobs, and their interviews test product knowledge, targets and how you handle people.

For a leasing consultant interview, expect questions about showing a property to someone who is unsure, how you handle an applicant whose paperwork is incomplete, what you do about a late rent payment, how you keep records of viewings and enquiries, and how you would follow the letting policy and tenancy rules you are given. Prepare one example of turning an enquiry into a signed agreement and one of calming an unhappy resident.

For sales or retail consultant roles, expect targets, objection handling, a role-play, and questions about working on commission. For an IT consultant role, expect a mix of technical screening and client-handling questions: explaining a fault to a non-technical user, scoping a small piece of work, and handling a client who wants something out of scope.

The tell is in the job advert. If it mentions cases, structure or clients plural, prepare the management consulting interview above. If it mentions targets, viewings, tickets or customers, prepare a role-play and your numbers instead.

How to prepare

Practise cases out loud with another person, not in your head. Ten cases spoken under time, with someone interrupting your structure, is worth more than fifty read silently. Record one and listen to how long you spend before your first structure appears.

Drill the arithmetic separately. Percentages, breakeven, ratios, growth over several years and unit economics should run without a calculator and without long silences. Learn to round deliberately and say that you are rounding.

Write three fit stories you can tell in 90 seconds: persuading someone, leading under pressure, and a failure you learned from. Then tailor the why-this-firm answer to each firm using its own published material, and note one question you want to ask each interviewer.

Finally, decide in advance what you will say about travel, hours and location. The National Careers Service gives typical hours for the role as 37 to 42 a week with evenings and weekends away from home, and the firms know the lifestyle is a common reason people leave. A candid answer about what you can sustain reads better than an implausible one.