How to get paid as a builder: dealing with late and non-paying clients

Late payment is one of the most common pressures on small building businesses, and it tends to hit hardest at the end of a project. Final invoices get queried, reduced, or simply ignored – and the knock-on effect on your cashflow can be serious.

We're hearing from more FMB members who are spending time chasing payments that should already be in the bank, with 90% of calls to our member helplines relating to payment issues. With costs rising and margins tight, even a single delayed payment can put real strain on your business.

This guide covers what you can do to keep control of your money before, during, and after a job.

Get the basics right before you start

Most payment problems don't start when an invoice is ignored. They start before a spade goes in the ground. Getting a process in place for contracts and payments is essential.

Using a robust contract is the single most important step. Even on smaller jobs, it gives both sides a clear understanding of what’s been agreed. Your contract should cover:

• Payment stages and specific amounts.
• Invoice due dates.
• What happens if payments fall behind.

Builders who rely on handshake agreements are more likely to find themselves in difficulty if a client disputes a figure later on.

 

FMB members have exclusive access to easy-to-use building contract templates – covering domestic and commercial work in England, Wales, Scotland and Northern Ireland.

They offer flexible payment schedules and options defects stage payments (sometimes called a retention clause) and outline a clear process for defects and dispute resolution. Giving both you and your client peace of mind.

Find out more about FMB contracts → 

Use 'short-interval' stage payments

To keep cash flowing, avoid waiting until the end of a long project to invoice. Our webinar on getting paid recommend breaking the total into smaller, more frequent instalments.

• Shorter intervals: Consider invoicing every seven to 14 days rather than monthly.
• Limit your risk: If a payment is missed, you are owed a smaller amount and can spot the problem earlier.
• Variable terms: You can vary your payment terms in your contract from 14 days down to seven days to keep money moving faster.

See also: Why builders run into cashflow trouble and how to avoid it →

Do your due diligence

Taking a moment to understand who you are working with can prevent issues later.

• Commercial checks: If the client is another business, always run a formal credit check.
• Consumer checks: Homeowners may have a digital footprint. Search for patterns of complaints online or check if they have a history of negative reviews on various platforms.
• Trust your gut: Pay attention to early ‘red flags,’ such as a client who constantly changes their mind or produces overly elaborate drawings after a price is already agreed.

Manage quality expectations

One of the most common causes of end-of-project disagreements are clients who use small ‘snagging’ issues as a reason to withhold the final payment.

To prevent this, be specific about the scope and quality from day one:

• Use industry benchmarks: Reference recognised industry tolerances, such as those set out in Building Regulations (which must be met) or British Standards (representing industry ‘best practice’), to define what ‘high quality’ actually looks like.
• Visual proof: Share photos of previous jobs or a ‘quality standard’ document so the client knows exactly what to expect.

What to do if a client won't pay

If a payment is overdue, don't leave it. Late payments that aren't chased promptly tend to stay late. Use the following steps to manage the situation professionally:

1. Check the basics and open a dialogue

Before escalating, ensure the invoice is accurate and was sent to the right person. If the due date passes, send a clear reminder setting out the original date and the amount owed. Pick up the phone—a direct conversation can often cut through in a way that email cannot.

2. Request details of any dispute

If a client is withholding payment due to a disagreement over quality or "snagging," ask them to provide specific details in writing. Review your own records, photos, and the original contract to see if their claim has a legitimate basis. Having a clear "benchmark" for quality established at the start makes this process much easier to resolve.

3. Gather your evidence

If a client goes quiet or continues to refuse payment, you must pull together your audit trail. A strong position relies on having the following organized:

• The signed contract: This should detail the agreed payment stages and terms.
• Written records of variations: Proof that any extra work was priced and approved in writing.
• Communication logs: A record of emails, notes from site meetings, and decision dates.
• Photo and video evidence: Visual proof of the work completed at various stages.

4. Consider pausing work

Continuing to work while payments are overdue increases your financial exposure. Politely informing the client that you will be pausing work until the account is brought up to date often prompts a response and prioritizes your invoice.

5. Charge interest on late payments

If it's in your contract, you're entitled to charge interest on overdue amounts for domestic projects. Include a clear late payment interest rate in every contract before work starts, state the due dates explicitly, and make sure the client signs to confirm they've read the terms. Keep it reasonable (rates that look unreasonable can be challenged), reference it on every invoice, and if you need to enforce it, your signed contract is your evidence.

If you carry out commercial work, the Late Payment of Commercial Debts (Interest) Act 1998 gives you additional statutory rights on top of whatever your contract says. While many of our members choose not to enforce interest in either case, having the clause in place gives you a stronger negotiating position and encourages clients to pay on time. FMB contracts include interest on overdue payments as standard and are available to all our members.

 

Your payment protection checklist

Download and start using this checklist on every new project to ensure your business remains resilient and your cashflow stays protected.

Download this checklist

Before the job starts

• Run a background check:  Google the client or check their online reviews for any patterns of complaints.
• Trust your gut:  If a client seems difficult or unrealistic during the quoting stage, consider if the project is worth the risk.
• Sign an FMB Contract:  Ensure you have a written agreement that specifies payment stages and dates.
• Set quality benchmarks:  Show examples of your work and ensure the client knows what to expect.
• Secure a deposit:  Confirm the client's commitment before starting work.

During the project

• Invoice frequently:  Use short-interval payments to keep cash moving.
• Record every variation:  Never carry out extra work without a written price and client approval.
• Capture visual evidence:  Take regular photos and videos of the work completed at each stage.
• Communicate often:  Keep the client updated on progress to catch any potential misunderstandings early.

If a payment is late

• Act immediately:  Chase the payment the day it becomes overdue; don't wait for it to become a "long-term" debt.
• Pause work politely:  If an invoice remains unpaid, stop work to limit your financial exposure.
• Check your audit trail:  Ensure you have your signed contract, approved variations, and photo logs ready if you need to escalate.

Support for FMB members

If you're dealing with a late or non-paying client, you don't have to work through it alone. As an FMB member, you have access to professional resources designed to help you take the next steps with confidence:

• FMB contracts: Secure your work with professional templates.
• Member helplines: Access our legal advice helpline for guidance on your specific situation.
• Dispute Resolution: We offer an impartial mediation service to help find common ground between you and your client.

For a deeper dive into these proactive business steps, you can also watch our help getting paid webinar.

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FAQs about getting paid on time for builders