What Would You Do If You Didn't Know the Answer to a Customer's Question?

If an interviewer asks what you would do when you don't know the answer to a customer's question, say you would be honest that you need to check, find the right answer from a trusted source, and follow up exactly when you promised. Never guess.

This is one of the most common customer service questions for call center, retail, chat support and tech support jobs. Below is why it matters, a four-step shape with hold and callback manners, three sample answers, phrases to avoid and a short drill.

Why interviewers care so much about this one

New agents do not know everything, and nobody expects them to. What hurts a business is the wrong answer said with confidence: a customer acts on it, calls back angry, and in banking, insurance or healthcare it can become a compliance problem. The interviewer wants to hear that you use the knowledge base, ask the right person, keep the customer informed while you check, and close the loop.

Admit, ask, answer, assure

1. Admit without apologizing too much: "I want to give you the right answer, so let me check."
2. Ask a trusted source: the knowledge base, account notes, your team lead, or floor support (the experienced agents who help new hires on the floor).
3. Answer clearly once you know, in plain words.
4. Assure: confirm it solved the problem, or set a callback with a real time.

Hold and callback manners: ask permission before placing someone on hold, say roughly how long it will take, and come back to update them if it runs longer. Follow your center's own hold rules. For callbacks, give a time you can keep and write it in the account notes.

Sample answers for three backgrounds

Call center

"I'd say, 'Let me check that so I give you the right answer. May I place you on a short hold?' Then I'd search the knowledge base, and if it isn't there, message floor support. If it takes longer than a couple of minutes, I'd come back on the line to update them. If a specialist team owns it, I'd explain the transfer first so they don't repeat themselves."

Retail

"At my hardware store job, a customer asked if a paint was right for a bathroom ceiling. I wasn't sure, so I told him I'd rather check than guess. We read the label together and then asked our paint lead, who suggested a product made for damp rooms. He came back the next week and asked for me by name."

Entry level

"I'd tell the customer I'm still learning that topic and find out right away, from our system or a senior colleague. Volunteering at my school library, I learned that 'let me find out' followed by a real answer earns more trust than a quick guess."

Phrases to drop and phrases to use

The other big mistake is a long silent hold. If you need more time, go back on the line and say so.

Two-minute "I don't know" drill

Ask a friend to fire three product questions you cannot possibly know, such as "Does this plan work in Canada?" For each, give the admit line, ask permission to place them on hold, and offer a callback time, all in under 30 seconds. Then answer one more in chat style, typed, since chat support interviews test the same habit in writing. Finish by reading what good customer service means and our guide to difficult customers.

Getting ready for service questions with CoPilot Interview

Our AI interview assistant is useful long before interview day. Its free AI mock interviews read customer service questions aloud and score each spoken answer out of 10 with what worked, what to improve and a model answer, so you can hear whether you sound calm and honest. See our customer service interview page for more questions. Live help is meant only for interviews where it is allowed: follow your employer's rules.

Disclosure: CoPilot Interview is our product, so weigh what we say about it accordingly.

Frequently asked questions

What should you say when you don't know the answer to a customer's question?

Say you want to give the right answer, so you will check. Ask permission before a hold, look in the knowledge base or ask a senior colleague, then answer clearly. If it takes longer, set a callback time and keep it.

Is it okay to put a customer on hold to find an answer?

Yes, if you ask first and say roughly how long it will take. Come back on the line to update them if it runs longer. Follow your company's hold rules, since many call centers set limits on hold time.

What is a warm transfer?

A warm transfer is when you explain the customer's issue to the next agent or team before connecting the customer, so they do not have to repeat everything. It is usually better than a cold transfer, where the call is passed with no context.

Should I admit in the interview that I would not know everything?

Yes. Interviewers expect new hires to have gaps. Admitting it, then showing how you would find the right answer and follow up, sounds more trustworthy than claiming you would always know.