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What to do if…
a client disputes your work and stops payment while deadlines are still approaching

Produced and maintained by PanicStation.org Published: Last reviewed: Editorial policy UK guide

Short answer

Move the dispute into writing today, avoid starting extra unpaid work, and check the contract before stopping any work you are already committed to deliver. Send one calm message that records what was delivered, what is disputed, what payment is overdue or withheld, and how this affects the next deadline.

Do not do these things

  • Do not take on extra unpaid work, new scope, or rushed revisions just to prove yourself.
  • Do not send angry, sarcastic, or threatening messages; assume anything you write may be read later by an adviser, mediator, or court.
  • Do not agree in writing that the work was not delivered, not usable, or outside scope unless you genuinely accept that.
  • Do not hand over extra source files, admin access, credentials, or new deliverables unless it is part of the agreed scope or a clear written settlement.
  • Do not delete client materials, shut systems down, change passwords, or lock anyone out in panic.
  • Do not let the client’s deadline force you into live negotiation; ask for the disputed points in writing first.

What to do now

  1. Stop the informal back-and-forth.
    Use one written channel for the dispute. Tell the client you will respond in writing so there is a clear record of scope, delivery, payment, and deadline impact.

  2. Collect the core documents in one place.
    Save the contract or statement of work, quote, estimate, emails, messages, change requests, approvals, delivery links, file versions, invoices, payment terms, and any notes showing what was agreed.

  3. Check the contract before making a hard stop.
    Look for sign-off steps, acceptance criteria, dispute wording, change-control wording, payment dates, rights to suspend work for non-payment, and any deadline obligations you still have. If the contract is thin, use the written trail that shows what was quoted, accepted, changed, delivered, and invoiced.

  4. Send a dispute clarification message today.
    Keep it factual and short. Include:

    • what you delivered, with dates and links or attachments
    • what was previously approved or confirmed
    • the invoice or milestone payment now unpaid or withheld
    • a request for a written, itemised list of the disputed issues
    • a request for the client to identify which amount is disputed and which amount is not disputed
    • the immediate deadline impact if payment and scope remain unclear

  5. Ask for the undisputed amount to be paid.
    If the client disputes only part of the work, ask them to pay the part they do not dispute now. Ask that the disputed items be put into a clear punch list with acceptance criteria, owners, and dates.

  6. Protect proof of delivery.
    Export or screenshot delivery messages, shared-drive upload logs, repository commits, ticket closures, approvals, comments, and any client feedback acknowledging receipt or completion. Save a clean copy of the exact files, versions, and links you delivered.

  7. Make a narrow decision about the next deadline only.
    Do not decide the whole relationship today. Decide whether the next piece of work can safely continue under the contract, or whether you need to pause new or extra work until the client confirms payment, scope, and acceptance criteria in writing.

  8. If you are a small business dealing with a larger private-sector business, check whether the Office of the Small Business Commissioner may help.
    The OSBC may be relevant where a small business has a payment dispute with a larger business. It cannot investigate every dispute, and some areas, including certain construction disputes, may sit outside its remit, but it can provide guidance or signposting.

  9. Keep late-payment remedies and court steps as later options.
    If a business-to-business invoice or an undisputed part of it is overdue, statutory interest and fixed compensation may be relevant. If the debt remains disputed, narrow the dispute first. Before any claim, use the correct pre-action process for the client and the correct court route for the UK legal system that applies.

What can wait

  • You do not need to decide today whether to sue, mediate, discount, or write off the debt.
  • You do not need to redesign your whole contract, pricing, or business model now.
  • You do not need to answer every message instantly; one calm written update is safer than rapid replies.
  • You do not need to negotiate scope live on a call; you can ask for a written, itemised issues list first.

Important reassurance

A sudden payment dispute can feel personal, but it is also a common pressure point in commercial work. Slowing the exchange down, asking for specifics, preserving proof, and avoiding extra unpaid work are normal professional steps.

Scope note

These are first steps only, to stabilise the situation and prevent rushed mistakes. Later decisions may need specialist help, especially if the amount is large, the deadline is critical, the client threatens a counterclaim, or different UK legal systems may apply.

Important note

This is general information, not legal advice, financial advice, or professional advice. The right next step depends on the contract, the client type, the disputed amount, the work delivered, and the applicable UK legal system.

Additional Resources

Closely connected guides that may be useful during the same situation or its immediate aftermath.

About this guide

This guide was produced and is maintained by PanicStation.org using its published editorial process. Official and specialist sources are checked where relevant, and AI-assisted tools may be used for drafting, organisation, and consistency checks. The site operator remains responsible for publication, revision, and removal decisions.

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