Walk them through it line by line, in plain words, before they decide it is wrong. Then fix how the next invoice is written.

What to Say When a Customer Does Not Understand the Invoice

Go through the invoice with them line by line, saying what each charge was for in plain words, and ask which line does not make sense before you defend any of it. Confusion is not a dispute, but it becomes one when the first answer is 'that is the standard rate'. Much of this call can be prevented before the work starts: a price agreed on site, and an invoice written so a homeowner can read it without picking up the phone.

The moment they call about the invoice

Say

Happy to go through it with you. Which line is the one that does not look right?

Not

That is our standard rate.

Say

That line is the part itself, and the one under it is the time to fit it. The tech was there about two hours.

Not

It is all itemized on the invoice.

Say

If anything here is different from what the tech told you on site, tell me and I will check it with them today.

Not

The tech would not have charged for something you did not agree to.

Write the next invoice so this call does not happen

When a line on it really is wrong

Say

You are right, that should not be on there. I will send a corrected invoice today.

Not

Pay it and we will sort out a credit later.

Say

That was quoted differently on site. I will charge what you were told.

Not

The system priced it that way.

The three ways this goes wrong

An invoice the customer cannot read is a problem with the invoice, not the customer. Walk them through it, fix what is wrong, and write the next one so it explains itself.

B

I answer the phones for contractors, and when a customer calls about an invoice I pull up the job notes before I answer. callbobai.com