What IBFlash Is
IBFlash is an AI-powered finance interview-prep platform that grades your actual answers -- not just whether you clicked the "right" multiple-choice box. When you answer a technical question, the AI scores your response on a structured 0-25 rubric calibrated against real Managing Director feedback, evaluates how you structured your reasoning, and returns specific, line-by-line feedback on what to fix. For behavioral questions, it scores your story against the STAR framework. The result is a practice loop that behaves like a demanding interviewer who tells you exactly why you lost points.
This page explains how that grading actually works, where the questions come from, who builds the platform, and what it costs. We keep it transparent on purpose -- finance interview prep is high-stakes, and you deserve to know how the engine under the hood reaches its scores.
How the AI Grading Works
Most interview-prep tools stop at a flashcard flip: here is the question, here is the model answer, decide for yourself how you did. IBFlash does the opposite. You type or speak a full answer, and the AI grades it the way a real interviewer would -- on both content and structure.
The 0-25 technical rubric
Every technical answer is scored on a 0-25 rubric. The rubric is not arbitrary. It is calibrated against feedback patterns from real Managing Directors and senior bankers -- the kind of corrections that get written on a candidate's superday scorecard. Points are distributed across dimensions like:
- Technical accuracy -- Are your numbers, formulas, and definitions correct? If you say enterprise value adds cash instead of subtracting it, you lose points exactly where an interviewer would catch it.
- Completeness -- Did you cover the components a strong answer requires, or did you stop halfway through the walk-through?
- Structure and clarity -- Did you answer in a logical order an interviewer can follow, or did you ramble? On a real desk, a disorganized "walk me through a DCF" reads as a candidate who does not understand the mechanics.
- Precision of language -- Finance has a vocabulary. Saying "profit" when you mean "EBITDA" or "free cash flow" signals you have not internalized the concepts.
Crucially, the AI does not just hand you a number. It returns specific improvement feedback: which step you skipped, which definition you got wrong, where your logic broke, and how a top-decile answer would have phrased it. A 14/25 with no explanation teaches you nothing. A 14/25 that says "you correctly built unlevered free cash flow but forgot to subtract the change in net working capital, and you never discounted the terminal value back to present" tells you precisely what to drill next.
Behavioral grading with STAR
Behavioral answers -- "tell me about a time you led a team," "why investment banking," "walk me through your resume" -- are graded against the STAR framework (Situation, Task, Action, Result). The AI checks whether you set up context, defined your specific responsibility, described concrete actions you personally took, and quantified the outcome. It flags the most common failure modes: stories that drift into "we" instead of "I," answers with no measurable result, and motivations that sound generic. Then it shows you a tightened version of your own story.
Because the grading covers structure as well as substance, you are not just learning the right answer -- you are learning to deliver it the way interviewers expect to hear it. For a deeper walk-through of the technical side, see our investment banking interview prep guide for 2026.
Voice Mock Interviews
Reading a model answer is not the same as saying it out loud under pressure. IBFlash's voice mock interviews put you across the table from an AI interviewer that listens, responds, and -- most importantly -- asks follow-ups based on what you just said.
If you give a vague answer on the cost of equity, it probes deeper: "And how would you estimate beta for a private company?" If your DCF walk-through skips the terminal value, it asks you to come back to it. This branching behavior is what makes a mock feel real. You cannot script your way through it, because the next question depends on your last answer -- exactly like a live superday.
At the end of the session, the AI scores your performance and gives you the same structured feedback you get on written questions: where you were strong, where you stumbled, and what to rehearse before the real thing. Voice reps are how you close the gap between "I know this" and "I can say this fluently when a VP is staring at me." You can find the voice mock and our other practice tools on the tools page.
Spreadsheet Modeling Tests
Investment banking, private equity, and many buyside roles increasingly test modeling live -- sometimes in a timed Excel case during a superday. IBFlash lets you build real DCF, LBO, and M&A models directly in the browser, and then grades every cell.
This is not a fill-in-the-blank quiz. You construct the model the way you would on the job: revenue build, operating assumptions, debt schedule, returns. The grader checks both the values and the formulas behind them. That distinction matters. Hardcoding 1,200 in a cell where the answer should be a formula linking revenue to a growth rate might give you the right number this time, but it would get marked down by any banker reviewing your work -- because a hardcode breaks the moment an assumption changes. IBFlash catches it, just like a staffer would when they audit your model.
You get feedback on circular reference handling, sign conventions, the structure of your debt waterfall, and whether your returns actually tie out. It is the closest thing to a real modeling test you can practice on repeat. To brush up on the underlying mechanics before you model, work through the core finance concepts library.
Where the Questions Come From
IBFlash is built on a library of 5,000+ questions spanning all five roles we cover: investment banking, private equity, hedge funds, venture capital, and consulting. The questions are modeled on the real technical and behavioral interviews candidates face at:
- Bulge bracket banks -- the large, full-service investment banks.
- Elite boutiques -- the advisory-focused shops known for tough, deal-heavy technicals.
- Top buyside firms -- private equity megafunds, growth equity shops, and hedge funds with rigorous modeling and stock-pitch screens.
Coverage runs from accounting fundamentals and the three-statement linkage, through valuation, DCF, LBO, and merger models, into role-specific territory like PE returns math, hedge fund stock pitches, VC market-sizing, and consulting case frameworks. The library is maintained and expanded as recruiting processes evolve, so what you drill reflects how firms actually screen candidates today. If you are early in the journey, start with our guide on how to break into investment banking.
Who Builds IBFlash
IBFlash is built and maintained by its Founders -- current finance professionals who have sat on both sides of the interview table. They have answered "walk me through a DCF" as candidates and graded it as interviewers. That experience is what makes the rubric credible: the 0-25 scoring, the follow-up logic in voice mocks, and the modeling-test grading all come from people who know what a real superday scorecard looks like.
The Founders keep their identities anonymous for employment reasons. People who work in finance generally cannot put their names on an outside product without creating conflicts with their employers. That anonymity is a constraint of the industry, not a lack of accountability -- it is precisely because they are still active in the field that the content stays current and accurate. We would rather give you a platform built by practitioners who must stay anonymous than a polished brand fronted by people who left the industry years ago.
Pricing
IBFlash offers two plans, both with a 7-day free trial so you can grade your first answers before paying anything:
- Starter -- USD 40 per month, or USD 300 per year.
- Pro -- USD 70 per month, or USD 500 per year.
The trial gives you full access to test the AI grading, voice mocks, and modeling tools on your own answers. You can compare the plans in detail on our pricing page, and see the complete capability breakdown on the features page.
Frequently Asked Questions
Is IBFlash accurate?
The grading is calibrated against real Managing Director feedback and built by Founders who are current finance professionals, so the rubric reflects how interviewers actually score answers. No AI grader is infallible, and we are transparent about that -- the value is in the consistency and the specificity of the feedback, which lets you find and fix weaknesses far faster than self-grading. The question library is modeled on real bulge bracket, elite boutique, and buyside interviews and is updated as recruiting evolves.
How is IBFlash different from a video course?
A video course is one-directional: you watch someone explain a concept and hope it sticks. IBFlash grades your answers. It tells you that your DCF walk-through skipped working capital, that your behavioral story drifted into "we," and that your LBO model hardcoded a value that should have been a formula. Watching is not the same as being tested, and being tested -- with specific feedback on follow-ups, structure, and content -- is what actually moves your interview performance.
What roles does IBFlash cover?
Five: investment banking, private equity, hedge funds, venture capital, and consulting. Each role has its own question set, modeled on the technical and behavioral interviews specific to that path -- PE returns and LBO depth, hedge fund stock pitches, VC market-sizing, consulting case frameworks, and the full IB technical core.
Is there a free trial?
Yes. Every plan starts with a 7-day free trial, so you can run your own answers through the AI grading, do voice mock interviews, and try the in-browser modeling tests before deciding whether to subscribe.
Do I practice modeling, or just answer questions?
Both. Beyond written and spoken questions, IBFlash includes spreadsheet modeling tests where you build real DCF, LBO, and M&A models in the browser and have every cell graded on both values and formulas -- the same way a staffer would review your work on the desk.
Try IBFlash
The fastest way to understand how IBFlash grades is to let it grade you. Answer one technical question, watch the 0-25 breakdown come back with specific feedback, and you will see the difference between flipping a flashcard and being interviewed. Start your free trial at https://www.ibflash.com and put your prep on a feedback loop that behaves like the real thing.
Practice what you just learned
Reinforce these concepts with free interactive tools built for IB interview prep.