Anyone who has worked in sales, account management or a client-facing role has lost a deal or a customer. Interviewers know that, so “Tell me about a time you lost a customer or deal” is not a trap to catch you out. It is a test of how you analyse a loss, how honestly you talk about your own part in it, and what you changed afterwards.
A lot of popular advice on this question is either too defensive or too confessional. Below, eight common beliefs are checked against what interviewers are actually assessing, followed by an illustrative answer and a short preparation checklist.
Myth 1: “Admitting a lost deal makes you look like a weak salesperson”
Fact: Losing is a normal part of competitive selling, and pretending otherwise is less credible than admitting it. O*NET, the US occupational database, reports that among wholesale and manufacturing sales representatives, 39% describe their level of competition as extremely competitive and 43% as highly competitive. An interviewer hiring for that kind of environment expects you to have lost business. What they cannot predict from your CV is how you respond to it, and your answer is their best evidence of how you will handle the next loss.
Myth 2: “Blame the price; everyone understands that”
Fact: “We lost on price” is the most common answer and usually the least useful. Price may genuinely have been a factor, but it rarely explains the whole loss. Strong candidates ask a second question: why did the buyer not see enough value to justify the price difference? Was it the wrong decision-maker, a weak business case, a late start, or a competitor who understood the problem better?
O*NET’s task list for sales representatives includes monitoring market conditions, product innovations and competitors’ products, prices and sales. If you lost to a competitor, show that you found out why, rather than just recording the outcome.
Myth 3: “Pick a loss that was entirely someone else’s fault”
Fact: An answer in which the product team, the delivery team or the customer caused everything tells the interviewer nothing about you, and it can sound like blame-shifting. Choose a loss where at least part of the cause was within your control: a missed signal, a stakeholder you did not meet, a follow-up you delayed, an assumption you did not test.
Amazon’s published Leadership Principles describe “Earn Trust” as including listening attentively, speaking candidly and being vocally self-critical. Many employers who never mention Amazon look for exactly the same quality in this question.
Myth 4: “The bigger the loss, the more impressive the story”
Fact: Size is not the point; the lesson is. A very large loss can raise questions you may not want to answer in an interview, such as whether you were held responsible. A mid-sized deal or customer, with a clear cause and a visible change in your behaviour afterwards, is usually the stronger choice. If the loss involved a confidential client, describe the sector and size, not the name.
Myth 5: “Losing a new deal and losing an existing customer are the same question”
Fact: They test different things, so check which one the interviewer means, or prepare both.
| Lost new deal | Lost existing customer | |
|---|---|---|
| What it mainly tests | Qualification, discovery and positioning against competitors | Account care, early-warning signs and service recovery |
| Typical root causes | Wrong contact, unclear need, late entry, weak business case | Unresolved problems, silent dissatisfaction, a champion leaving, a contract renewal left too late |
| What a strong lesson sounds like | “I now map every decision-maker before proposing.” | “I now hold a review with each key account before renewal is due.” |
For retention stories, note that O*NET lists consulting with clients after sales or contract signings to resolve problems and provide ongoing support among the core tasks of sales representatives. An existing customer who leaves is often a sign that this part of the job slipped.
Myth 6: “End with the win you got back”
Fact: A comeback can be a good ending, but it is not required, and forcing one makes the answer sound rehearsed. Many real losses stay lost. What the interviewer needs is evidence that your approach changed. The best evidence is a later deal or account where you did something differently, and a result from that.
The UK Civil Service’s “Delivering at Pace” behaviour describes having a positive and focused attitude to achieving outcomes despite any setbacks. A calm, factual description of the loss followed by what you now do differently demonstrates exactly that attitude.
Myth 7: “Do not use numbers; it draws attention to the loss”
Fact: Sales interviewers trust numbers. Giving the deal value, the length of the sales cycle or the share of an account’s spend shows you track your pipeline seriously. Use ranges or approximations if exact figures are confidential, for example “a mid-six-figure annual contract” or “about 15% of my territory’s revenue”.
Numbers also help in the “after” part of your story: “Over the next two quarters, my win rate on deals where I mapped all stakeholders was noticeably higher than on those where I did not.”
Myth 8: “This question only comes up in sales interviews”
Fact: It appears in many client-facing roles: account management, customer success, agency work, consulting, recruitment, real estate, banking relationship roles and even procurement (where a “lost” supplier relationship can be the subject). Adjust the language. A recruiter might talk about a client who moved their roles to another agency; a customer success manager might describe a non-renewal.
An illustrative answer
The following answer is invented to show the technique. It is not from a real candidate.
“Two years ago I was account executive for mid-sized logistics companies, selling fleet-tracking software. I had a deal worth about a quarter of my quarterly target with a regional distributor. I had spent six weeks with their operations manager, who loved the product, and I was confident.”
“Two days before signing, the finance director joined the call for the first time and asked about total cost over three years, including installation. I had not prepared that because I had never met him. We lost the deal to a competitor whose upfront price was higher but who had already shown finance a three-year cost model.”
“Afterwards I asked the operations manager for honest feedback, and he confirmed that finance had felt left out. Looking back at my pipeline, I found three other deals where I only had one contact. I set myself a rule: no proposal goes out until I have spoken to whoever signs off the budget, and I built a simple three-year cost template I could adapt for each prospect.”
“In the next two quarters, I used that template on every deal over a certain size. I closed two of the three single-contact deals after bringing finance in earlier, and the template was later shared with the rest of the team. I still lose deals, but I rarely lose them for that reason now.”
Why it works
- Clear ownership: “I had not prepared that because I had never met him.”
- Root cause, not excuse: the loss is explained by a single-threaded relationship, not by price alone.
- Feedback sought: the candidate asked the buyer why.
- Behaviour changed: a specific rule and a template, applied to later deals.
- Honest close: “I still lose deals” sounds real.
Preparation checklist
- List two or three losses from the last few years: at least one new deal and, if relevant, one existing customer.
- For each, write the honest cause in one sentence, including your part.
- Note what feedback you got, or what you found out about the competitor.
- Write down the specific change you made afterwards.
- Find a later example where that change made a difference.
- Decide what you can say about deal size without breaching confidentiality.
- Practise a two-minute version using STAR. The National Careers Service describes the Result step as both what happened and what you learned, which fits this question well.
Follow-up questions to prepare for
- What would you do differently if you could rerun that deal?
- How did your manager react?
- How do you decide when to walk away from a deal?
- How do you know early that a customer is at risk of leaving?
- What is your current win rate, and how do you track it?
If you are updating your CV at the same time, keep losses off it but turn the lesson into a result, such as a retention improvement or a team-wide tool you created. The sales executive resume builder and the resume questions hub cover how to phrase sales results without overstating them.
Frequently asked questions
Should I name the competitor who won?
It is usually fine to name a well-known competitor in general terms, but avoid criticising them. Focus on what they did well and what you learned from it.
What if I have never worked in sales?
Use a related loss: a client who moved to another supplier in a freelance role, a sponsor who withdrew from a student event, or a proposal that was not accepted. The method is the same.
Is it all right to say the customer made a poor decision?
Avoid it. Even if you believe it, it sounds like blame. Explain what the customer valued and why your offer did not match it at the time.
How recent should the example be?
Ideally within the last two or three years, so the lesson is clearly part of how you work now.
Sources
- 41-4012.00 Sales Representatives, Wholesale and Manufacturing, Except Technical and Scientific Products, O*NET OnLine
- Leadership Principles, Amazon Jobs
- Success Profiles: Civil Service Behaviours, GOV.UK (Cabinet Office)
- The STAR method, National Careers Service