New: Practice Investment Banking Interview Questions Online

You can read every article on this site, download the full PDF guide, and still freeze when an interviewer asks you to walk through a DCF out loud. That gap between knowing a concept and being able to produce it under pressure is where most interviews are won or lost, and it is the exact gap that reading alone never closes. Recognition feels like mastery when you are reviewing an answer you already agree with, but recognition is not recall, and interviews test recall.

That is why we built a dedicated practice platform on IB Interview Questions, and it went live this week. It is not another library of explanations. It is a place to actually practice: pull up a question, answer it before you see the solution, compare your version to a model answer, and honestly rate how close you were. Do that a few hundred times across technicals, brainteasers, and behavioral questions, and the material stops being something you have read and becomes something you can deliver.

This post covers what the platform is, why practice beats passive review, how each of the four practice modes works, what is free versus what Premium unlocks, and how it fits alongside the guides, the blog, and the iOS app. No hype, just what it does and how to start.

At its core, the platform is a structured way to test yourself on everything banks ask, then see your progress build over time. It lives at the practice area of this site and works in any browser, on a laptop or a phone.

Four Ways to Practice in One Place

The practice area is organized into four modules, each mapped to a distinct part of the interview:

The point of putting all four in one place is that real interviews mix them. A single first-round can move from "Why investment banking?" to a napkin LBO to "How many golf balls fit in a school bus" in fifteen minutes, and practicing them in isolation across four different tools makes that whiplash harder to rehearse.

Built Into the Site You Already Use

The practice area is not a separate app or a separate login from the rest of the website. It sits alongside the articles, the sector and product guides, and the deal-focused content you may already be using to learn. When a blog post explains a concept, the practice area is where you drill the questions that concept generates, and your account carries your progress between the two.

The case for a practice platform is not a marketing claim, it is one of the most replicated findings in learning science. Decades of research show that the act of retrieving information from memory strengthens it far more than reviewing the same information again.

Retrieval Practice and the Testing Effect

In a landmark set of experiments, students who studied a passage once and then tested themselves on it repeatedly dramatically outperformed students who simply re-read the same passage four times, when both groups were assessed a week later. The extra reading produced a comforting sense of familiarity that faded fast; the retrieval produced durable memory. Later work confirmed that testing yourself even improves how well you learn material you study afterward, an effect researchers call the forward effect of testing. The practical takeaway is blunt: an hour spent answering questions is worth more than an hour spent re-reading answers.

Retrieval Practice

A study method where you actively pull information out of memory, by answering a question or explaining a concept from scratch, rather than reviewing it passively. Also called the testing effect, it produces stronger long-term retention than re-reading, highlighting, or re-watching the same material, which is why practicing interview questions beats rereading interview guides.

Feedback Turns Practice Into Progress

Retrieval alone is powerful, but it compounds when paired with honest feedback. Research on how experts are actually made, summarized in Harvard Business Review's work on the making of an expert, points to deliberate practice: focused repetition on tasks just beyond your current ability, with immediate feedback that tells you what to fix. A model answer is that feedback loop in miniature. You commit to your version, see the polished one, and the gap between them is precisely the thing to work on next time.

From Learning Science to an Interview Bank

The platform is built to make that loop as frictionless as possible. Every technical question hides its solution until you ask for it, then asks you to rate your recall so the system knows what to resurface. Behavioral questions give you a blank field to draft your own answer before you study the framework. Brainteasers walk through the reasoning, not just the number. The design is deliberately simple because the hard part is not the interface, it is doing the practice itself, and the tool should get out of the way.

Practice is the part of interview prep most candidates skip: Drill technical questions, brainteasers, and behavioral answers in one place with worked solutions, start practicing interview questions for free and find out what you can actually recall under pressure.

Each of the four modules is designed around how that specific part of the interview is tested, so the practice format changes to match.

Technical Questions: The Core of Every Interview

The technical bank is the flagship, with more than 1,900 questions in total. Roughly 360 sit across the four core topics that every candidate faces, accounting, valuation, M&A, and private equity and LBO, and more than 1,500 more are drawn from the ten sector and product guides on the site, from FIG to real estate to capital markets.

You do not grind through them as one endless list. Instead, you build a focused session: choose a topic or a guide, set a difficulty, pick a length, and start. Each question shows the prompt first. You think through your answer, reveal the model answer when you are ready, and rate whether you got it. A question counts as solved once you have answered it correctly at least once, and mastered after three correct answers, so your standing reflects durable recall rather than a single lucky guess.

Behavioral: The Stories Every Interview Opens With

Almost every interview starts with the same handful of questions: walk me through your resume, why investment banking, why our firm, tell me about a failure, what would you ask me. The behavioral module covers the ten that open most interviews, and for each one it explains what the interviewer is actually probing for beneath the surface.

The format here is different because behavioral answers are personal. Rather than a single model response, each question gives you a framework plus a text field to draft your own answer, which saves to your account so you can refine it over weeks instead of writing it from scratch the night before. When an answer feels ready, you mark it, and your progress shows how many of your stories are interview-ready.

Brainteasers: How You Think Under Pressure

Brainteasers are less about the right number and more about whether you can reason out loud without panicking. The brainteaser module includes forty of the classics, the mental-math drills, probability puzzles, and lateral-thinking questions that bankers use to watch how a candidate handles being stuck. Each one comes with a full worked solution that shows the reasoning pattern, so you learn the method rather than memorizing a trivia answer.

Brainteaser

A short logic, probability, or mental-math puzzle used in interviews to test how a candidate reasons under pressure rather than what they have memorized. Interviewers care more about your structured thought process and composure than the final answer, so talking through your approach clearly matters as much as getting the number right.

Interview-Ready Guides: One Focused Read Per Area

The tenth thing candidates need is a way to get technically fluent in a coverage area without reading dozens of articles. The full guides on the site go deep and stay free, but they are a lot to absorb before a single interview. The interview-ready guides distill each of ten sectors and product groups into one focused read, followed by quick multiple-choice checks that confirm the material stuck. Think of them as the concentrated version you review the week before a superday, when preparing for the day itself matters more than depth.

The practice platform runs on a freemium model. A meaningful amount is genuinely free and stays that way, and Premium unlocks the full technical practice system on top. Here is the split at a glance.

What Is Free

Behavioral questions, all forty brainteasers, and the entire guides library are free for everyone, no account required to read them. Create a free account and you also get a twenty-question sample of the technical bank, five per core topic, one full interview-ready guide, and, importantly, your progress saved to the cloud across every device you use. No card is required for any of that.

What Premium Unlocks

Premium opens the entire technical system: all of the more than 1,900 questions across the four core topics and all ten sector and product guide banks, every one of the ten interview-ready guides, and the session modes that make targeted practice possible, including weak-spot sessions and drilling your bookmarked questions. Progress tracking and accuracy analytics extend across the whole bank rather than just the free slice.

Pricing is straightforward. Premium is $19.99 per month, or $39.99 for three months, which works out to about $13.33 a month and covers a full recruiting season. There is also a launch lifetime option at a one-time $99.99, available for a limited window, that unlocks everything permanently including whatever gets added later. Billing runs through Stripe, and you can cancel anytime from your account.

Want the frameworks on paper too: Download our comprehensive 160-page PDF, access the IB Interview Guide covering the technical questions and frameworks banks test in interviews.

The practice area is one piece of a larger toolkit, and it works best when you use the pieces for what each does well rather than treating any one as complete on its own.

The Guides and the Blog Teach, the Platform Drills

The full sector and product guides and the blog are where you learn concepts from the ground up: what enterprise value is, how a merger model works, why bank valuation breaks the usual rules. That conceptual grounding matters, because drilling questions on a topic you have not learned yet just teaches you to memorize answers. The natural workflow is to learn a concept in a guide or article, then move to the practice area to test whether it holds up when you have to produce it. Reviewing the mistakes that get candidates auto-dinged alongside your practice sessions is a good way to catch bad habits early.

The iOS App

If you prefer practicing from your phone, the IB Interview Questions iOS app carries the question bank, brainteasers, and AI mock interviews. For now it is a separate product with its own subscription, and we cover what shipped in the latest app release in its own post. A web Premium subscription unlocks the website, not the app, until we unify accounts across the two, which is on the roadmap.

Getting into your first practice session takes about a minute, and you can do everything below on the free tier before deciding whether Premium is worth it.

The habit to build is small and repeatable: a short session most days beats a marathon the night before an interview, because retrieval works best when it is spaced out over time. Ten minutes of drilling on the subway adds up faster than most candidates expect.

Every candidate who has ever bombed a question they "knew" understands the problem this platform is built to solve. Understanding a concept and performing it on demand are different skills, and only one of them gets you an offer. Reading builds the first; practice builds the second.

The new practice platform gives you a structured, low-friction way to do the kind of tested, repeated practice that actually moves you from familiar to fluent, backed by the same retrieval-practice principles that show up everywhere from medical licensing exams to elite performance. The free tier is enough to build the habit and see whether it works for you, and it costs nothing to find out. Open the practice area, create an account, and run your first session tonight. Your future interviewer will be able to tell whether you have practiced, and now you have a place to do it.