Free McKinsey Solve practice: what is actually available
The short version
- McKinsey does not publish an official practice test. The firm's stated position is that you do not need to prepare at all.
- Free preparation does exist, but it falls into distinct types that train very different things, and most of them do not train the thing Solve actually scores hardest.
- Reading guides teaches you mechanics. Only a timed run at the real interface teaches you pacing, and pacing is what most candidates lose on.
- Our free Redrock case is a full timed run through all three phases, no card required, so you can find out where your clock breaks before it counts.
- Most candidates have one to two weeks between invitation and deadline, which is enough time if you spend it on the right things.
Searching for a free McKinsey Solve practice test turns up a lot of pages and not much clarity, mostly because the assessment is proprietary and nobody outside McKinsey has the real thing. What exists instead is a set of free resources that each cover part of the problem. Knowing which part is the whole game.
Here is what is genuinely available at no cost, what each type is good for, and where each one stops.
What McKinsey gives you for free
Less than you would hope. McKinsey maintains an official page describing the assessment and its rules, and the firm's position is that candidates do not need to prepare.[1] Candidates the firm has interviewed about the experience describe reading the official guidance and getting a good night's sleep as their entire preparation.[2]
Your invitation email is the other free resource, and it is the important one. It tells you your deadline and your time allocation, which is how you know whether you are sitting the sixty-five minute two-game version or the eighty-five minute version that adds Sustainable Futures Lab.[3] Read it carefully before you plan anything.
That elimination rate is the reason this question gets asked so often. Estimated pass rates cluster around 20 to 30 percent.[4] Free practice is worth doing, as long as you know what each kind buys you.
The five types of free practice
Detailed explanations of each module: what Redrock asks you to do, how Sea Wolf's constraints work, what Sustainable Futures Lab presents. Ours are free to read, including the complete Solve guide and per-game breakdowns.
Percentage change, weighted averages, growth rates and quick estimation, practiced until they are automatic. Our consulting math drills are free and unlimited.
The free numerical and logical reasoning tests used for graduate schemes generally. Widely available and genuinely free.
Recent accounts from people who just sat it, on Reddit and similar communities.
An actual playthrough on the real clock, in the real phase structure, with the constraints that lock behind you. This is the only category that produces the specific feedback you need.
Why the timed run matters more than the reading
Solve does not only mark your answers. It also builds a score from behavioral data captured while you play: which data you opened, how you navigated, the order you made decisions in, and how you spent the clock.[5] Two candidates submitting identical answers can score differently.
You cannot rehearse that by reading. It is closer to a motor skill, and the only free resource that touches it is a full timed playthrough. That is why our free tier is a complete Redrock case rather than a sample question or a locked demo.
A free-only prep plan
Most candidates get roughly one to two weeks between invitation and deadline.[4] If you are working entirely from free resources, this ordering gets the most out of it.
One rule that survives any prep budget
Finish every module. An unanswered item is a guaranteed zero on the product side, and the pacing failure behind it is a negative signal on the process side. A rushed estimate beats a blank field every time.
What free practice will not give you
Being straight about this matters more than a sales pitch. A single free run diagnoses your problem. It does not fix it. Repetition does, and repetition across all three modules is where free tiers everywhere run out, ours included.
Free practice also cannot tell you your real score. McKinsey does not release score reports, percentiles or feedback by default, and you get one attempt per application cycle.[6] No practice tool can predict a decile ranking that depends on who else sat the assessment in your pool.
And no amount of practice changes the integrity rules. McKinsey's assessment page prohibits external applications, websites, AI tools and pre-prepared notes during the assessment, and requires you to sit it alone.[1] Practicing formats beforehand is ordinary preparation. Bringing anything into the live assessment is not, and the stated consequences run as far as rescinded offers.
Frequently asked questions
Is there an official free McKinsey Solve practice test?
No. McKinsey does not publish a practice version of the assessment, and its stated position is that candidates do not need to prepare. The official page describes the format and the rules, not sample gameplay.
What free McKinsey Solve practice actually helps?
Written guides for mechanics, mental math drills for Redrock arithmetic, and at least one full timed simulator run for pacing. The timed run matters most, because Solve scores how you work and not just your answers.
Can I practice Redrock for free?
Yes. Our free tier includes a complete timed Redrock case through all three phases, with no card required, so you can see where your clock breaks before it counts.
How long do I have to prepare after getting the invitation?
Most candidates get roughly one to two weeks between invitation and deadline, though this varies by office. Check your invitation email, which also tells you your time allocation and therefore which format you are sitting.
Is practicing on a simulator against McKinsey's rules?
No. Practicing formats beforehand is ordinary interview preparation. What the rules prohibit is using external applications, websites, AI tools or pre-prepared notes during the live assessment, and sitting it with assistance.
Is free practice enough to pass?
For some people, yes. A free run diagnoses your weak point, but fixing it takes repetition across all three modules, which is where free tiers generally end. Roughly 70 to 80 percent of candidates do not clear this stage.
Sources
- McKinsey & Company, "Solve, McKinsey's assessment game," official assessment page, accessed August 2026. No-preparation position and assessment integrity rules.
- McKinsey & Company Careers Blog, "My experience with the McKinsey Problem Solving Game." Candidate accounts of how they prepared.
- IGotAnOffer, "McKinsey Solve: 2026 Guide," August 2026. Sixty-five and eighty-five minute formats and the phased Sustainable Futures Lab rollout.
- Hacking the Case Interview, "McKinsey Solve: The Complete Guide," June 11, 2026. Reported pass rate range and typical invitation-to-deadline window.
- CaseBasix, "McKinsey PSG Scoring Explained," January 16, 2026. Behavioral data captured during the assessment.
- Prepmatter, "McKinsey Solve Walkthrough," December 23, 2025. Absence of score reports and one attempt per cycle.
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