Billing error apology email
The rule for billing errors: fix first, email second. The message should describe a correction that has already happened, not a promise to look into it. Charging someone the wrong amount and then asking them to wait compounds the error.
Subject: We charged you incorrectly — here's the correction
Hi [first name], We made a billing mistake on your account, and I want to be upfront about it. What happened: on [date], you were charged [wrong amount] instead of [correct amount] — a difference of [difference]. This was caused by [plain-language reason, e.g. "a plan change that applied twice"]. What we've already done: the difference of [difference] was refunded to [payment method] today. It should appear within [timeframe]. Your next invoice will show the correct amount of [correct amount]. This was our error, not anything you did. We've [specific prevention step, e.g. "added a check that blocks duplicate plan changes"] so it doesn't happen again. If the refund hasn't appeared by [date], or if anything on your invoice still looks off, reply here and I'll sort it personally. [your name]
Replace every [bracketed] placeholder before sending — the brackets are there so an unfilled field is impossible to miss.
How to use this template well
- Refund before you write. "We've already refunded the difference" is a different email from "we will refund the difference".
- Show both numbers and the difference — making the customer do invoice arithmetic erodes the trust you're trying to rebuild.
- Say explicitly that it wasn't something they did. Billing errors make people quietly wonder if they misclicked.
Related templates
Refund approval emailConfirm the amount, the card, and the arrival window — the three things they'll ask otherwise.Service outage apology emailWhat broke, how long it was down, what you fixed, and what changes so it doesn't repeat.Subscription cancellation confirmation emailConfirm the cancellation cleanly — the last email is the one they remember.
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