The consulting interview process is a sequence of filters, not a single “case interview.” You can pass the case and still die on the test, the PEI, or a partner’s “why this office.” This page walks the shared funnel — resume → online assessment → first round → final → offer — and the fit formats that actually differ: McKinsey’s Personal Experience Interview (PEI), BCG’s fit questions, and Bain’s experience / “Bainie” screen. Case technique belongs in case guides. Timing of applications belongs in the deadlines planner.
Stage 1: Resume screen
A human or an ATS decides whether you exist. MBB is harsher on school, GPA band, and brand internships; Big 4 and many Tier 2 screens are higher volume and more practice-specific. Referrals move you from algorithm to person — that mechanism is in how to get into MBB and the networking guide.
What the screen is scoring: can we staff you without embarrassment. Quantified bullets, one page, no objective statement. Details: consulting resume guide. A beautiful case prep plan does not help if this stage never fires.
Cover letters are firm-specific when required. Recycled “I want to solve problems” letters fail faster than no letter in processes that do not ask for one.
Stage 2: Online assessment
If you clear the resume, many firms send a one-attempt test before a live interview.
| Firm pattern | Typical tool | What it is for |
|---|---|---|
| McKinsey | Solve (game modules) | Process, not trivia; fail and the live round never happens |
| BCG | Casey chatbot (and sometimes other screens) | Mini case under time; you cannot rewind |
| Bain | Sova (verbal, numerical, logical, SJT) | Percentile cut plus consistency on judgment |
| Big 4 / others | HireVue, numerical, or firm chatbot | Volume filter; format varies by practice |
Pass rates for MBB tests are discussed with sources in how to get into MBB (Solve often cited around ~30% of invitees at cutoff). Do not invent a Deloitte percentage from that number.
Treat the invite like an interview: quiet room, charged laptop, one sitting. Prep the named test, not a generic aptitude app.
Stage 3: First round
Usually two interviews, each 30–45 minutes, mixing a case and a fit block. Interviewers are often associates, engagement managers, or consultants — people who still do the work.
Case. First round is a competence gate: structure, math you can narrate, a recommendation that matches the evidence. McKinsey is more interviewer-led. BCG and Bain are more candidate-led. Big 4 first rounds can be shorter and more operational. You are not expected to sound like a partner. You are expected not to get lost.
Fit — this is where the three MBB brands diverge.
McKinsey PEI. A dedicated Personal Experience Interview, often 10–15 minutes, scored on dimensions such as entrepreneurial drive, inclusive leadership, and personal impact. They want one story, deep: what you did, what resistance you hit, what changed because of you. Surface-level “we as a team” stories fail. Prep guide: McKinsey PEI.
BCG fit. Usually shorter, paired with the case, more conversational. They still want specificity — why BCG, why this office, a conflict, a time you changed your mind. BCG fit is not a soft PEI. It is a check that you can work with the interviewer for a week. Generic prestige answers (“best training”) are weak.
Bain experience / teamwork. Bain interviews treat collaboration as a hiring criterion, not a personality extra. Stories should show you making the team better, not just winning the case club. Bain also cares that you have talked to Bainies and can say something true about the office. The Bain internships guide shows how this shows up even for intern hiring.
Big 4 / Tier 2. Fit is often “why this practice” (Monitor vs core, Parthenon vs EY consulting) plus teamwork and client-service stories. Using a McKinsey PEI script without translating it is a tell.
First-round rejects are frequently uneven scores: strong case + empty fit, or clean math + no recommendation. Both halves count.
Stage 4: Final round
Same ingredients, higher bar, senior interviewers (principals, partners). Cases get messier. Synthesis is expected earlier. Fit is re-tested with new people, so one memorized PEI story told identically four times sounds canned. Have two or three stories that can stretch.
Final round is also a staffing and office conversation. Partners ask why this city, this practice, this travel model. Weak answers here sink people who already “passed the case.” Save real questions for the end of the interview — see questions to ask your interviewer. That is not the same skill as a coffee chat.
Written cases, group cases, or presentation rounds show up at some firms and some experienced-hire processes. If the invite names a format, practice that format.
Stage 5: Offer (and the wait)
Decisions often land in one to four weeks after finals, sometimes faster on campus. Silence is not always a no; it is also not a yes. One polite recruiter check after the window they named is enough.
The letter is a cohort package more often than a negotiation playground. Campus MBB base is typically class-wide. Signing, start date, and office are the usual levers. Read offer negotiation and sanity-check numbers against the salary guide. Do not negotiate a verbal.
Intern processes follow the same five stages with a shorter case and a conversion mindset — internship interviews. Returning from a summer is return offers, not this funnel.
How to prepare for the process, not just the case
Map your firms to stages. If BCG is on the list, Casey is a stage-2 problem before you grind partner cases. If McKinsey is on the list, PEI stories need as much rehearsal as profitability trees.
Run first-round simulations as two interviews back to back, including fit. Final-round simulation means a harder case plus a partner-style “why us” that is not your first-round script.
If you are rejected, diagnose which stage. Resume vs test vs first-round case vs fit vs final is five different comeback plans. Reapplying without that diagnosis repeats the same failure.
The process is boring on purpose. Firms are trying to compare hundreds of people on the same gates. Your job is to show up ready for the gate you are actually in — not to treat every conversation as a case lecture.
Sources
- CoachNed, How to get into MBB (five-gate funnel, assessments, PEI weight)
- Firm interview pages (McKinsey, BCG, Bain) for live format names — confirm on the invite
- CoachNed, Consulting offer negotiation (what happens after the letter)