Almost every invoice dispute is a scope dispute that arrived late. The client is not usually claiming the work was not done. They are claiming it was not what they agreed to pay for.
Which means the document that settles it is the quotation, not the invoice.
An invoice dispute has two separate questions
- Is the invoice wrong? A figure, a quantity, a rate. If so, issue a credit note and reissue. This is administrative, not a dispute.
- Is the scope disputed? The client believes something was included that you priced separately, or vice versa. This is the real one.
Establish which you are dealing with before responding, because the correct answer to the first is an apology and a corrected document, and the correct answer to the second is not.
Working a scope dispute
- Go back to the accepted quotation. What did it say, what did it exclude, and what did the client accept in writing?
- Find the moment it changed. Additional work almost always has a moment: a phone call, a decision on site, a request by message.
- Check whether you confirmed it. If extra work was agreed verbally and never confirmed in writing, you are in a weaker position and it is better to know that now.
- Decide what the relationship is worth. A R2,000 dispute with a client who spends R80,000 a year is not a legal question.
Responding
Written, factual, unemotional. Set out what was quoted, what was accepted, what changed and when. Attach the quotation and the invoice. Propose a resolution rather than demanding one.
Where you are partly wrong, say so and credit that portion immediately. Conceding the defensible part strengthens your position on the rest, and clients who are argued with on every point stop paying anything at all.
Preventing the next one
| Cause | Prevention |
|---|---|
| Vague scope on the quotation | Write exclusions, not just inclusions |
| Extra work agreed verbally | One message confirming it, before you do it |
| Invoice wording differs from the quote | Match the text |
| Client did not see the total until invoicing | Send interim updates on longer jobs |
Common questions
Should I stop work while a dispute is open?
Say so in writing before you do, and give a date. Stopping without warning escalates a dispute into a breakdown.
Do I have to credit the whole invoice?
No. Credit the disputed portion if it is justified and leave the rest standing.
What if we cannot agree?
The usual routes are mediation, a collections agent or legal action, and which is worth it depends on the amount.
A quotation with clear scope and exclusions is the document that settles this. Free to use.
Create a professional quotationDisclaimer: This content is for general information only and does not constitute legal, tax, accounting or financial advice. Always confirm important requirements with SARS, the relevant authority or a qualified professional.
