Why solo practice is harder, but still worth doing
Practicing with a partner is valuable because they can play interviewer, feed you information at the right pace, and give real-time feedback. Without one, you lose that dynamic exchange, but solo practice still builds two things you genuinely need: comfort with structuring under time pressure, and fluency talking through your logic out loud, both of which you can develop without another person in the room. Many candidates undervalue solo practice simply because it feels less realistic, but the underlying skills it builds transfer directly into live cases.
The self-case method
Pick a case from a casebook or online source, but instead of reading the full prompt and information at once, cover the parts you haven't reached yet, revealing information incrementally as you'd get it in a live interview. Read only the initial question, build your structure, then reveal the next piece of data only after you've stated what you'd ask for. This forces you to practice the actual skill of working with partial information rather than solving a fully visible puzzle where all the answers are sitting in front of you from the start.
Recording yourself and reviewing it
Record yourself talking through a full case out loud, from clarifying the question through to a final synthesis, then watch it back. This is uncomfortable the first few times but extremely useful, since you'll notice habits you can't catch while you're in the middle of thinking, like filler words, silent math, or a synthesis that trails off instead of landing clearly. Compare recordings over a few weeks to see concrete improvement, which also helps with motivation during a long prep process that can otherwise feel like it's not producing visible progress.
Using written cases and casebooks
Many university consulting clubs publish casebooks online that include both the case prompt and a suggested approach or solution. Work the case yourself first, fully, before looking at the suggested approach, then compare your structure against theirs to see what you missed or where your framework was weaker. This comparison is often more instructive than the practice attempt itself, since it directly shows you the gap between your instinct and a strong answer, which is hard to see clearly without something to compare against.
When you eventually need a real partner
Solo practice builds structure and fluency, but it can't replicate the unpredictability of a real interviewer who pushes back, asks a question you didn't anticipate, or gives you data that doesn't match your assumption. Once you're comfortable with the mechanics solo, prioritize finding even a few live practice sessions, whether with a friend, a study group, or a peer also preparing for interviews, since that's the only way to practice reacting to something outside your own control.
Building a realistic solo practice schedule
Spread solo practice across several weeks rather than cramming it into a few days before an interview. A reasonable rhythm might be math drills a few times a week, one or two full self-case attempts weekly, and periodic review sessions where you watch back recordings and compare against casebook solutions. This spacing lets skills like narration and structuring actually settle in as habits, rather than being freshly memorized techniques that fall apart the moment a live interviewer asks something unexpected.
Where to eventually find a live practice partner
Once you're ready to move beyond solo practice, look for a university or alumni consulting club, an online community specifically built around case interview preparation, or peers going through the same recruiting process who have an equal incentive to practice seriously. Trading sessions where you each take turns interviewing the other is efficient, since both people get practice on both sides of the table, and playing interviewer for someone else is itself a useful exercise, since it sharpens your sense of what a strong versus weak answer actually sounds like from the outside.
Using conversational AI tools as a practice partner
A newer option worth considering alongside the traditional solo methods is practicing a case out loud with a conversational AI tool that can play interviewer, feed you information incrementally, and ask follow-up questions. This can approximate some of the back-and-forth unpredictability of a live partner, particularly for candidates who don't have easy access to peers also preparing for the same kind of interview. It's not a full replacement for practicing with an experienced human interviewer, since it may not catch every subtlety a trained case interviewer would notice, but it fills a real gap in solo preparation between static self-case practice and a genuine live session.
Tracking your progress without external feedback
Without a partner giving you feedback after each attempt, it helps to build your own simple rubric to self-assess: did I clarify the question, did I build a MECE structure, did I narrate my math, did I reach a clear recommendation within a reasonable time. Score yourself honestly against this short checklist after each practice case, and look for patterns across several attempts rather than judging any single case in isolation. This turns solo practice into something closer to structured deliberate practice, rather than just repetition without a clear sense of whether you're actually improving.
Avoiding a plateau in your solo practice
It's common to see fast improvement in the first several solo practice cases, followed by a plateau where each additional case feels like it's producing diminishing returns. When this happens, deliberately vary what you're practicing rather than repeating the same type of case, try an unfamiliar industry, a case type you haven't focused on yet, or a stricter time limit than usual. Introducing this kind of variation tends to break through a plateau far more effectively than simply doing more of the same practice that got you to that plateau in the first place.