Last Updated on September 24, 2026
By Dr. Florian Smeritschnig, Former McKinsey Senior Consultant · Updated September 2026
Consulting firm tiers work like this: Tier 1 is McKinsey, BCG, and Bain (MBB); Tier 2 is the strategy firms just below them, such as Oliver Wyman, L.E.K., Kearney, Roland Berger, and the Big 4 strategy arms (in some cases); and the full-service Big 4 and Accenture make up what candidates call Tier 3. Boutiques and small consultancies are the fourth type. They sit beside that ladder rather than under it.
Most tier lists stop there and argue about who belongs where. That argument matters less than it looks. The tier you target decides the work you’ll do, the interview you’ll face, and the doors that open in year four, and candidates who pick by logo alone often prepare for the wrong interview.
So treat this page as the map. Every tier has its own StrategyCase guide with firm lists, pay data, and interview detail. This page shows you which tier fits your situation and where to read next. I spent five years at McKinsey and since 2020 my coaching clients have secured 700+ consulting offers. 340 of them were at MBB, which means more than half came from the other tiers on this map.
Key Takeaways
- Tier 1 is MBB, Tier 2 is the strategy firms just below them, and Tier 3 is the Big 4 and other full-service consultancies. These are candidate labels. No firm uses them.
- Tier ranks prestige within strategy work. Type describes the business model. Choose the type first, then aim for the highest tier within it.
- Boutiques sit outside the ladder rather than at its bottom. The best-paying ones start US MBA hires at $170,000 to $190,000 base, per GMAC’s salary roundup.
- Your target tier sets your interview: the hardest live cases at Tier 1 and 2, more behavioral weight at the Big 4, partner-led domain questions at boutiques.
- Most candidates should apply across two adjacent tiers. The case skills overlap, so one preparation covers both.
Consulting Firm Tiers at a Glance
Here is the whole market in one table, compared on what matters for a career decision.
| Tier or type | Example firms | The work | Entry pay vs MBB | Interview focus |
|---|---|---|---|---|
| Tier 1: MBB | McKinsey, BCG, Bain | Board-level strategy, 4 to 12 week projects | The benchmark | Hardest live cases, fit interview, online test |
| Tier 2: strategy firms | Oliver Wyman, L.E.K., Kearney, Roland Berger, Strategy&, EY-Parthenon, Monitor Deloitte | Strategy work close to MBB, more sector-led | Near parity for undergrads, a real gap post-MBA | Close to the MBB case bar, plus firm-specific tests |
| Tier 3: Big 4 and full-service | Deloitte, PwC, EY, KPMG, Accenture, IBM Consulting, Capgemini | Implementation, technology, and transformation, often 6 months or longer | Lower, except at the strategy arms | More weight on behavioral questions, lighter cases |
| Boutiques and specialists | Analysis Group, OC&C, Simon-Kucher, ZS Associates, AlixPartners | Depth in one industry or one function | Top firms near MBB on base, wide spread below | Partner-led, domain questions, “why us” |
| Small firms and in-house teams | Regional and founder-led firms, corporate strategy units | Mid-market clients, long relationships | Usually lower | Conversational, team fit |
What Are Tier 1, Tier 2, and Tier 3 Consulting Firms?
Consulting firm tiers are an informal ranking that candidates use for strategy work. Tier 1 means McKinsey, BCG, and Bain. Tier 2 means strategy firms that compete with them for clients and candidates at smaller scale. Tier 3 usually means the Big 4 and other large full-service consultancies. No firm publishes or uses these labels.
The ladder grew out of campus recruiting, MBA clubs, and candidate forums, which is why it shifts depending on who you ask. Some forums add a Tier 4 for small regional firms. Others slot the Big 4 strategy arms in at “Tier 2.5”. None of it is official.
Two caveats make the labels usable. First, tiers are regional. Roland Berger carries far more weight in Germany than in the US, so a firm that is Tier 2 in one market can be a first choice in another. Second, the entity on your offer letter matters more than the parent brand. Monitor Deloitte and Deloitte’s core consulting practice share a name and sit in different tiers.
Then there is the distinction most tier lists skip. Tier ranks prestige within strategy work, while type describes how a firm makes money. The four types of consulting firms (strategy firms, full-service firms, boutiques, and small consultancies) run different business models, so a pricing boutique and a Big 4 technology practice are not above or below each other. Use type to decide where you fit. Use tier to rank the firms within that type.
Each Tier in Brief, and Where to Read Next
Each section below gives you the short version and hands you to the guide that covers that tier in full.
Tier 1: McKinsey, BCG, and Bain
MBB sells board-level strategy: where to compete, what to acquire, how to respond when a market turns. Projects are short and intense, typically 4 to 12 weeks with small teams. The three firms set the benchmark for pay, selectivity, and exits into private equity and corporate strategy.
The price is your calendar. Expect long weeks, travel on client demand, and an up-or-out promotion clock. Among the candidates I coach, the hours are the single most underestimated part of the deal.
The Big 3 consulting firms guide covers the three as a group. If you’re choosing between them, read McKinsey vs BCG vs Bain.
Tier 2: The Strategy Firms Just Below MBB
Tier 2 splits into two groups. The independents are Oliver Wyman, L.E.K. Consulting, Kearney, and Roland Berger. The corporate-owned strategy arms are Strategy& (PwC), EY-Parthenon, Monitor Deloitte, and Accenture Strategy. The work is often genuinely comparable to MBB, usually with a sharper sector focus and narrower global coverage.
For candidates, the trade is somewhat less brand power in exchange for better odds. Once you reach the case rounds, offer rates run roughly 15 to 20 percent at Tier 2 firms against 10 to 15 percent at MBB. Firms don’t publish these numbers, so treat them as calibrated estimates; the method sits in the StrategyCase analysis of case interview success rates by firm.
The firm-by-firm ranking, pay data, and the “take the offer or hold out for MBB” decision are all in the tier 2 consulting firms list. Already at one and eyeing MBB? Read moving from Tier 2 to MBB.
Tier 3: The Big 4 and Full-Service Firms
Full-service firms sell scale. They advise, then build, implement, and run: technology rollouts, finance transformations, post-merger integrations, and multi-year change programs. This tier covers the consulting practices of Deloitte, PwC, EY, and KPMG, plus technology-led firms such as Accenture, IBM Consulting, and Capgemini.
The scale is a different order of magnitude. Deloitte reported US$70.5 billion in FY2025 revenue with more than 470,000 people, and Accenture employs close to 800,000. At the Big 4, consulting sits alongside audit and tax, so compare consulting practices, not firm totals.
This is where the offer letter matters most. The strategy arms recruit and pay closer to Tier 2, and their case interviews are harder. The core consulting practices pay less: roughly $85,000 to $130,000 in total US analyst compensation against $115,000 to $165,000 at MBB, per the Big 4 consulting firms guide. In exchange you get more predictable hours and a close view of how change actually gets implemented. The cost is slower promotion and staffing that can land you on an 18-month systems project.
For interview prep, see Big 4 case interviews. For the move upward, see switching from the Big 4 to MBB.
Boutiques and Specialists: Beside the Ladder, Not Below It
Boutiques go deep in one industry or one function instead of wide across many: economic and litigation consulting, pricing, restructuring, life sciences. They don’t fit the tier ladder, because the best of them compete with MBB on their own ground. GMAC’s boutique salary roundup shows the strongest paying US MBA hires $170,000 to $190,000 base.
A few specialists, such as Simon-Kucher, ZS Associates, and AlixPartners, show up on Tier 2 lists and boutique lists alike. Both readings are fair. The tier view compares them with MBB for strategy work, and the boutique view asks whether their niche is the one you want to build a career in. HR and human capital consulting (Mercer, Korn Ferry, WTW) belongs in this group too: specialist firms selling one function across every industry.
Which boutiques are worth joining, what each category pays, and how to vet one before you sign are covered in the guide to boutique consulting firms.
Small Consultancies and In-House Strategy Teams
This type covers the thousands of firms under roughly 100 consultants: regional strategy shops, founder-led specialist teams, and independents. They serve mid-market companies that need senior attention without global-firm rates. Projects are regional, travel is light, and juniors often carry responsibility that MBB reserves for engagement managers.
Many large companies also run in-house strategy or consulting units. They recruit consulting-style talent, pay industry salaries, and offer a steadier pace, with one catch: your only client is your employer.
Which Consulting Firm Tier Should You Target?
When I was at McKinsey, I worked alongside experienced hires who had joined from Big 4 and boutique firms. The skill transfer was real, but the operating model shock was bigger than any of them expected. A six-week strategy sprint with a four-person team runs on completely different rhythms than a year-long transformation program with 40 people. The firm type, more than the brand, had shaped what they were good at.
That’s why the order matters. Pick the type that fits how you want to work, then aim for the highest tier within it. Here is where to start, by situation:
| Your situation | Start with | Why | Read next |
|---|---|---|---|
| Student at a target school, no fixed industry | Tier 1 and Tier 2 in parallel | Same case skills, overlapping timelines, better combined odds | MBB target schools |
| Student outside the target list | Tier 2, Big 4 strategy arms, and boutiques, alongside MBB | These firms recruit from a wider set of schools | How to get into consulting |
| You already know your industry or function | A boutique in that niche, plus the MBB practice that covers it | Depth compounds fastest where it’s the whole firm’s business | Boutique guide, linked above |
| You want technology and implementation work at a steadier pace | Tier 3: Big 4 consulting or Accenture | Longer projects, more predictable hours | How many hours consultants work |
| You’re an experienced hire | The tier that values your domain most | Tier changes the level and track you enter at | Experienced hires at McKinsey, BCG, and Bain |
| PhD or strong quantitative background | Economic consulting boutiques and MBB advanced-degree tracks | Both recruit researchers on purpose | Moving from academia to consulting |
One contrarian note from the interviewer’s side of the table. “Target the most prestigious firm that will take you” is the default advice everywhere, and it’s wrong for a meaningful share of candidates. The unhappiest consultants I hear from a year after their offer are almost always the ones who picked on prestige alone.
Your Tier Decides Your Interview
This is where most candidates misallocate their prep time, because the format changes with the tier:
- Tier 1 and Tier 2 run 2 to 4 rounds of live case interviews plus fit questions, usually after an online screen such as McKinsey Solve, a BCG online case, or a firm-specific numerical test.
- Tier 3 weighs behavioral questions and motivation more heavily and uses lighter case formats. The strategy arms are the exception and interview at close to Tier 2 difficulty.
- Boutiques are partner-led and less standardized. Expect domain questions, written cases, and a hard look at why you want this firm specifically.
- Small firms and in-house teams interview conversationally. The real question is whether they can put you in front of a client next month.
When I evaluated candidates at McKinsey, the strongest ones were obvious within minutes because they had trained the underlying skills, not a script. That holds at every tier on this map. Only the format changes. StrategyCase’s Case Interview Academy trains those skills directly: case structuring, exhibit interpretation and data analysis, and case math, with thousands of practice drills.
FAQ: Consulting Firm Tiers
What are tier 1, 2, and 3 consulting firms?
Tier 1 is McKinsey, BCG, and Bain. Tier 2 is the strategy firms just below them: Oliver Wyman, L.E.K., Kearney, Roland Berger, and the strategy arms Strategy&, EY-Parthenon, and Monitor Deloitte. Tier 3 usually means the core consulting practices of the Big 4 plus Accenture, IBM Consulting, and Capgemini. The labels come from candidates, not from the firms.
Where do Deloitte and the other Big 4 fit in the consulting tiers?
They split across two tiers. Their strategy arms (Monitor Deloitte, Strategy&, and EY-Parthenon) compete in Tier 2, while their core consulting practices sit in Tier 3. Check which entity the job posting names, because that decides both the pay and the interview you’ll face.
Why isn’t McKinsey one of the Big 4?
The Big 4 are professional services networks built on audit and tax, with consulting as one business line among several. McKinsey, like BCG and Bain, is a pure management consultancy with no audit business. That’s why candidates group the three separately as MBB.
Is there a tier 4 of consulting firms?
Not in any agreed sense. Some candidate forums use “Tier 4” for small regional or founder-led consultancies, but nobody applies it consistently. Judge small firms on their clients, the work juniors actually do, and where their alumni go.
Which type of consulting firm pays the most?
Tier 1 sets the benchmark. A first-year US Business Analyst at McKinsey earns roughly $140,000 in total compensation, and a post-MBA Associate about $245,000, per the McKinsey salary breakdown. The best boutiques and Tier 2 firms come close at entry, while Big 4 core consulting pays noticeably less.
Should I apply to more than one tier?
Yes, for most candidates. Tier 1 and Tier 2 test nearly the same case skills, so one preparation covers both, and applying across two adjacent tiers raises your odds of at least one offer. Add a third tier only if you would genuinely take the job.
Related Guides
- What is management consulting? explains the job itself before you pick a tier
- How to become a management consultant covers qualifications, entry routes, and timelines
- Consulting exit opportunities helps you work backwards from where each tier can take you
- The pros and cons of a consulting career if you are still deciding whether consulting is the right move
The Bottom Line on Consulting Firm Tiers
Consulting firm tiers rank strategy prestige, from MBB through Tier 2 to the Big 4. Types describe the business underneath, and boutiques and small firms sit beside the ladder rather than on it. The candidates who end up happiest choose the type first, aim for the highest tier within it, and prepare for the interview that tier actually runs.
Whichever tier you land on, the case interview decides the offer. Start the free StrategyCase Case Interview Foundations course: 40+ videos and 7+ hours of instruction on the skills every tier on this map tests.
Dr. Florian Smeritschnig is the founder of StrategyCase.com and a former McKinsey Senior Consultant who evaluated candidates for the firm. Since 2020 he has delivered 2,200+ mock interviews and coaching sessions, and his clients have secured 700+ consulting offers, 340 of them at McKinsey, BCG, and Bain. He is the author of three books on consulting interviews and careers, including The 1%: Conquer Your Consulting Case Interview.
