The final invoice has landed and the work isn’t right. Withholding money is your most immediate, most powerful lever — and the one homeowners most often fumble, either by paying in full “to keep the peace” or by refusing to pay anything and handing the builder a claim. The law supports a middle path, and it’s precise.
The principle
Payment and performance are linked: you owe the price for the work as contracted. Where work is defective or incomplete, you’re entitled to hold back the reasonable cost of putting it right — a set-off against the price. What you’re not entitled to do is withhold sums out of proportion to the problem: a £900 snagging list does not justify sitting on a £9,000 final payment. Courts see disproportionate withholding as your breach, complete with interest running against you.
How much to withhold
Price the defects like a claim, because it may become one:
- List each item specifically.
- Put a repair figure against each — a written quote from another trade is the gold standard; benchmarked figures from the Cost Index and day rates serve for smaller items.
- Add a modest margin for investigation where the extent is unclear (opening up a suspect area).
- Withhold that total; pay the rest on time.
Paying the undisputed balance promptly is tactically vital: it demonstrates good faith, keeps you the reasonable party in the file, and removes the builder’s counter-narrative (“they just don’t want to pay”).
Put it in writing — always
Withholding without explanation is indistinguishable from not paying. Send, before or with the due date:
“Of your final invoice of £11,400, I am paying £8,650 today. I am withholding £2,750 in respect of the attached list of defective/incomplete items, calculated as shown. This will be released on satisfactory completion of those items.”
On JCT and other formal contracts, this mirrors the contractual pay less notice mechanism — served within the contract’s stated timescales, which matter: miss the notice window on a contract that has one and you may owe the full sum notified regardless of the defects (you’d claim them separately instead). Check your contract’s payment clause before the due date, not after.
Where withholding goes wrong
- The silent freeze — no notice, no breakdown. Reads as breach, invites a claim, loses the moral high ground.
- The total freeze — withholding everything over partial problems. Same result.
- Manufactured snags — inflating a list to engineer a discount. Adjudicators and judges have seen ten thousand of these and price them accurately.
- Withholding against the wrong entity — on jobs with separate trades, hold money only from the contract the defect belongs to.
- Forgetting the retention — if your contract already holds a retention, that’s your first recourse for snagging; withholding stacks on top only for matters beyond it.
What happens next
A withholding notice usually triggers one of three things: the builder fixes the items (the common case — money is the only language some disputes speak); negotiation toward a settled figure (fine — in writing, “full and final”); or escalation. If they threaten court, your notice, your list and your quotes are your defence file; if they threaten to “send the boys” or place a lien on nothing in particular, that tells you what you’re dealing with — stay written, stay calm, and follow the escalation ladder.
And if the boot is on the other foot — the work is fine and you simply can’t pay yet — none of this applies. Talk to the builder; silence converts a cash-flow problem into a dispute.
This guide is general information for homeowners in England and Wales, not legal advice.
