Customer disputes the invoice: how to keep recovery on track
How to handle a disputed invoice
Four steps for a creditor whose customer says the invoice is wrong.
- Ask for the complaint in writing Request a specific written statement of what is wrong, which invoice lines it affects and what they say it is worth.
- Gather your evidence Pull together the contract or quote, change requests, delivery or sign-off records and every message about the work.
- Separate the disputed from the undisputed Ask for payment of the undisputed part now and keep the rest open with a date to resolve it.
- Escalate if it stalls If there is no specific reply by your deadline, send a letter before action and consider an agency to take it forward.
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When a customer says “we’re not paying because…”, it can mean two very different things. Either there is a genuine problem with the work or the invoice, or the customer has found a reason to delay. Both sound the same in an email. Your job is to find out which, in writing and quickly, so the debt doesn’t stall while everyone argues.
Why disputes appear when you chase
Few customers raise a complaint when they receive the work. Many raise it when the first reminder lands. That timing proves nothing, but it is worth noting. A real problem usually has a date, a person and a detail attached. A stalling tactic usually has none of those: “we weren’t happy”, “it wasn’t what we expected”, “we’ll look into it”.
Pin the dispute down in writing
Reply politely and ask for three things: what exactly is wrong, which invoice lines it affects, and what they believe is a fair figure. Give a date, and keep it short. Phone calls are fine for the relationship, but follow each one with an email saying what was agreed.
This does two jobs. It forces a vague complaint to become specific, which is where many of them fall away. And it creates the record a court or agency will want to see. A clear paper trail helps you whichever route follows, including the steps in the pre-action protocol if the debtor is an individual or sole trader.
Common types of dispute
- Quality. “The work was substandard.” Look for sign-off, acceptance emails, or use of the work. A customer who has used what you delivered is in a weaker position to say it was worthless.
- Scope or price. “That’s not what we agreed.” Your quote, change requests and the emails around them settle most of these.
- Delivery. “We never received it.” Proof of delivery or access logs answer this.
- Set-off. “You owe us something too.” That is closer to a counterclaim, covered in what to do when a debtor threatens a counterclaim.
Collect the undisputed part first
Few disputes cover the whole invoice: a complaint about one line, one delivery or one stage of a project rarely justifies withholding everything. Ask for payment of the undisputed amount now, in writing, and treat the balance separately. It brings money in, shows good faith and narrows the argument to what actually matters. Keep a simple schedule showing the invoice total, what is agreed, what is paid and what is still contested, and send it with each message so nobody can say they lost track. If the customer pays part, say in writing that it is received on account of the undisputed sum, and that you are not accepting it in full settlement.
Don’t let the clock run
Delay helps the debtor, not you. Set a date for their written response, and say what happens if it doesn’t come. Waiting rarely resolves things, as we explain in why “I’ll give them another few days” is a mistake, and the time limit for a claim in England and Wales is six years, restarted only by a signed written acknowledgement or a part payment made before it expires. A part payment is therefore worth having for more than the cash.
When it won’t settle
If there is no specific reply by your deadline, send a letter before action. If the complaint is real but the customer won’t engage, a debt collection agency can negotiate between the two positions without a court claim, and those with a litigation arm can take it further. Small claims in England and Wales generally cover up to £10,000, so many disputed invoices can be tested there without a large legal bill, though it is worth taking advice first.
The short version
Ask for the complaint in writing, collect what isn’t disputed, and set a date. A real dispute can be answered with evidence; a fake one rarely survives being written down. When it stalls, compare vetted UK debt recovery agencies on Collect Compare, with names hidden until you choose, or let us match you to a suitable fit. Whether an agency takes a case can depend on how strong the dispute looks, so be upfront about it. It is free for creditors: the agency you choose pays for the introduction, and no agency can pay to rank.
This is general information, not legal advice. How a dispute should be handled depends on your contract and the facts, so take advice before issuing a claim.
Frequently asked questions
Can a customer withhold payment just by disputing an invoice?
A dispute does not make a debt disappear, but a genuine one gives the customer something to argue, and it is better dealt with early than left to harden. A vague complaint that appears only after you chase carries far less weight than a specific one raised when the work was delivered.
Should I stop chasing while an invoice is disputed?
No. Keep going on the part that is not in dispute and ask for the rest of the dispute in writing with a date to respond. Silence from you can look like agreement that the complaint was fair.
Can I charge statutory interest on a disputed invoice?
Interest at 8% plus the Bank of England base rate applies to business-to-business debts. Keep your calculation by invoice, so that if part of the invoice is later agreed to be wrong you can update the figure cleanly.
What if the customer pays part and disputes the rest?
Accept the part payment in writing, say that it is received on account of the undisputed sum only, and keep the disputed balance open. Do not describe it as full and final settlement unless you mean it.
