How to write an apology email to a client, with examples

Everyone makes mistakes with clients. What clients remember is how you handled it. A good apology owns the mistake, fixes it and says what changes. Handled well, it can leave a client trusting you more than before.

The four parts

• Say what went wrong, specifically.
• Take responsibility. No excuses, no blaming others.
• Say how you are fixing it, and when.
• Say what you will do so it does not happen again.

Give one sentence of explanation if it helps. More than that sounds like an excuse.

Template: a mistake in your work

Hi Fatima,

I made a mistake in the report I sent on Monday. The sales figures for March were copied from February, so the totals on page 3 are wrong. I am sorry. You may already have shared it, which makes it worse.

The corrected report is attached, with the changed figures highlighted.

From now on, I check every table against the source before I send a report, not after.

If it would help, I am happy to explain the changes to your team on a short call.

Template: a missed deadline

Hi Victor,

I missed the deadline we agreed for the new homepage. It was due yesterday, and it will be ready on Thursday. That is my responsibility, and I am sorry.

I underestimated the work on the booking section. I should have told you as soon as I saw the risk, not on the day.

To make up for it, I have taken the extra two days off the final invoice. And from now on, I will send you a short progress note every Friday.

Template: a slow reply

Hi Grace,

I am sorry for taking a week to reply to your email about the contract. That is not the response you should get from us.

The answer to your question: yes, the second phase can start in January, at the same rate.

For small things, apologise in one line and get to the answer.

Phrases to avoid

These all avoid saying who did what. "Mistakes were made" is the classic. "I made a mistake" is the version clients trust.

Call or email?

For a serious mistake, one that costs the client money, time or face, call first. Then confirm in writing what you agreed. For smaller ones, a clear email is enough.

Offer something fair

If your mistake cost them time or money, offer something fair: a reduced invoice, extra work at no cost, a faster delivery next time. Fix the problem first. A discount without a fix feels like paying them to go away.

Then follow through

The apology is only finished when the promised change is real. If you said you would send weekly updates, send them. That is what turns a mistake into trust.

For complaints that come from the client first, see how to respond to a customer complaint. For other hard messages, there are more customer service email templates.