How to reply to a client disputing your invoice

Updated November 12, 2026

Reply within one business day, after you check the invoice against the agreement and your own records. Ask which line they dispute if they did not say. Then either correct the error, explain the charge with proof, or hold firm politely. Stay factual and calm. Most disputes are a misunderstanding about scope, hours, or a missing purchase order.

Reply

Within 1 business day. While the dispute is open, payment stops. A quick, factual reply shortens that and shows you are willing to listen.

What your reply should say

1. Thank them for raising it and say you will check the specific invoice and lines.
2. Compare the invoice to your agreement, emails and time or work records before replying.
3. State your finding: a correction, or an explanation with the proof attached.
4. Say what happens next, including the new amount and due date.

3 replies you can copy

Pick the one that matches what you want to say, copy it, and change everything in [brackets].

Hi [Name],

Thank you for flagging this. I checked invoice [number], and you are right about [line item]. That was my error.

I have attached a corrected invoice for [new amount]. The new due date is [date].

Sorry for the confusion. Please let me know if anything else looks wrong.

Best,
[Your name]

Hi [Name],

Thanks for raising your question. I understand the [line item] charge may look unclear.

It covers [explanation]. This was agreed in [contract section or email on date], and I have attached it, along with [records, such as the timesheet].

If you still see it differently, I am happy to go through it on a short call. Does [time] work?

Best,
[Your name]

Hi [Name],

Thank you for telling me about your concern. I have checked invoice [number] against our agreement, and I believe the amount of [amount] is correct.

I can see where we may read it differently. Could we talk for ten minutes on [day]? I would rather settle it together than let it drag on.

Please pay the undisputed amount of [amount] by [date] in the meantime.

Best,
[Your name]

Already late? Send this instead

For when you are several days late or more. Own the delay in one line, then do the job.

Hi [Name],

Sorry for the slow reply about invoice [number]. I wanted to check everything before answering.

My finding: [correction or explanation]. I have attached [corrected invoice or proof].

Could you pay [amount] by [date]? If you still have a question, reply here and I will answer it quickly.

[Your name]

Mistakes to avoid

• Replying with anger or hinting that they are trying to avoid paying.
• Defending the invoice before you have checked it against your own records.
• Threatening collections or fees in your first reply.
• Disputing it back without attaching the agreement, timesheet or emails that support you.

Questions people ask

What if they refuse to pay the disputed part?

Ask them to pay the part they agree with now, and keep working on the rest. Put every decision in writing. If it stays stuck, check your contract for what to do, and ask a lawyer before taking any formal step. Keep the tone calm throughout.

Should I pause work while an invoice is disputed?

Check your contract first, since it may say. If it does not, be careful about stopping suddenly. Tell the client honestly what you can continue with and what needs the dispute to be solved. Ask an adviser if the amount is large.

More reply guides

• How to reply to a request for a quote
• How to reply to a supplier's price increase email
• How to reply to a payment confirmation email
• How to reply to a client saying the budget was cut
• How to reply to a vendor's follow-up email
• How to reply to a partnership proposal email

How this page was made

Written by Westward, who make Orbit, as starting points you edit before sending. The replies use placeholders, not real people or real mail. Nothing here is legal, tax or medical advice; for contracts, money or health, check the document or ask a professional. All reply guides.