Latest / Interview Prep with Fexingo: Behavioral Questions, Case Studies, and Hiring Manager Insights / How to Ace the Tell Me About a Time You Made a Mistake Question
Transcript
- Lucas: Let me ask you something, Luna. You're in an interview, and the hiring manager says, 'Tell me about a time you made a mistake.' What's the first thing that goes through your head? Luna: Honestly? Panic. Because if I pick something too small, I look like I'm avoiding the question. If I pick something too big, I might disqualify myself. Lucas: Exactly. And that's why this question is so hard. It's not really about the mistake — it's about your ability to take ownership, learn, and change behavior. A lot of candidates treat it like a confession they have to survive. Luna: Right. They try to spin it into a positive, like 'my mistake was caring too much.' And the interviewer sees right through it. Lucas: Yeah, that's the classic 'my biggest weakness is that I work too hard' move — it's a cliché. So let's give our listeners a real framework. I call it the 'four-part confession.' Luna: I'm listening. Four parts? Lucas: Part one: set the stakes. Describe the situation briefly — what was the task, what was at risk. Part two: own the mistake. No blaming the system, the deadline, or a colleague. Use the word 'I' clearly. Part three: explain the consequence — what actually happened because of your error. And part four: the fix — what you did afterward to correct it and what you changed going forward. Luna: So basically a STAR method but with a specific emphasis on accountability? Lucas: Exactly. And the key is that the mistake has to be real. Not a 'I once used the wrong font in a presentation' trivial thing. But also not 'I lost the company a million dollars' if you're a junior analyst. You want something that shows you're human but also competent. Luna: Can we give an example? I think listeners need to hear how the four parts sound in practice. Lucas: Sure. Let's say you're a financial analyst, and you're interviewing for a senior analyst role. You could say: 'In my second year as an analyst, I was responsible for building a discounted cash flow model for a potential acquisition. I accidentally linked the wrong growth rate assumption — I used the industry average instead of the company-specific rate. The model overvalued the target by about 15 percent.' Luna: That's a solid mistake. It's technical, it has a clear impact, but it's fixable. Lucas: Right. Then part two: 'I caught the error during a review meeting when the managing director asked a question I couldn't answer. I immediately admitted the mistake in front of the team.' That's owning it — no deflection. Luna: And part three — the consequence? The manager probably wasn't thrilled. Lucas: Right. 'The consequence was that we had to redo the valuation, which pushed back the deal timeline by two weeks. The team had to work weekends to catch up.' That shows you understand the real cost. Luna: Then part four — the fix. Lucas: 'After that, I created a checklist for financial models that includes a cross-reference step where a second analyst verifies key assumptions before the model is used in a presentation. That checklist is now standard practice in my group.' So you institutionalized the lesson. That's gold. Luna: I love that. It shows you didn't just learn — you made the system better. Lucas: That's the whole point. The hiring manager wants to know if you're the kind of person who hides a mistake or who uses it to prevent future problems. Luna: One thing I'd add: don't pick a mistake that's more than three years old unless it's truly transformative. Recent mistakes feel more authentic. Lucas: Great point. And if you're early in your career, it's okay to pick a mistake from school or an internship. Just frame it in a professional context. Luna: What about the emotional tone? I've heard candidates sound either too flippant or too apologetic. Lucas: You want a tone of calm ownership. Not defensive, not overly dramatic. You can start with a slight pause to show you're thoughtful. Then speak with genuine reflection. Luna: And avoid the word 'unfortunately.' That's a red flag — it signals you're about to make an excuse. Lucas: Yeah. 'Unfortunately, the deadline was too tight' — you just shifted blame. Instead, say 'I underestimated the time required.' Luna: One more trap: some candidates try to use the 'I made a mistake' question to brag about a positive outcome. Like 'I made a mistake but then I saved the day.' Lucas: Right. If the mistake led to a great result, it's not really a mistake. The interviewer will see it as a disguised success story. You want a true failure — something that didn't go well. Luna: Exactly. And that's hard because we're conditioned to present ourselves as perfect. But the truth is, the most impressive candidates are the ones who can talk honestly about a screw-up. Lucas: You know, this kind of honest conversation is exactly why we keep this show ad-free. We don't want to sell you anything — we want to give you real frameworks that work. If you find value in episodes like this, one way to support the show is at buy me a coffee dot com slash fexingo. It's a small gesture that helps us stay independent. Luna: Yeah, and it really does make a difference. We don't have a big corporate sponsor, so listener support keeps the lights on. Lucas: All right, back to the question. Another common variant is 'Tell me about a time you failed.' That's essentially the same question, but the word 'failure' can feel heavier. Luna: I think the framework still works. But with 'failure,' you might want to emphasize the emotional impact a bit more — how you felt when you realized it. Lucas: Good call. And one more thing — practice your story out loud. Record yourself. If you hear yourself laughing nervously or using too many filler words, tighten it up. Luna: And time it. Your answer should be about 90 seconds to two minutes. Any longer and you lose the interviewer. Lucas: Perfect. So to recap: pick a real mistake, use the four-part structure — stakes, ownership, consequence, fix — and deliver it with calm reflection. That's how you turn a scary question into your strongest answer. Luna: And if you have a story that's worked for you, we'd love to hear it. Drop us a line on the show's social channels. Lucas: Thanks for listening. Next time we'll tackle another behavioral staple — 'Tell me about a time you had to persuade someone.' See you then.