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How to chase an unpaid invoice

A calm, step-by-step approach to getting paid, from the first friendly reminder to your options if a customer still won't pay.

Late payment is one of the most stressful parts of working for yourself. The good news is that most unpaid invoices get paid after a polite reminder or two. Here's a step-by-step approach that keeps things friendly for as long as possible.

Step 1: Check your own side first

Before you chase, make sure the invoice was right:

If there's a genuine problem, fix it first. It's usually the quickest route to being paid.

Step 2: Send a friendly reminder

A few days after the due date, send a short, polite reminder. Assume they forgot. Give the invoice number, the amount, the original due date and a new pay-by date, usually about 7 days away. Include your bank details again.

Our late payment letter has three ready-written stages. The first reminder is the friendly one.

Step 3: Pick up the phone

If there's no reply after a week or so, call. A conversation often uncovers what a letter can't: a cash-flow problem, a dispute about the work, or an invoice stuck with someone else. Make a note of what was said and any date they promise.

Step 4: Send a second reminder and offer a plan

The second reminder says how many days the invoice is overdue and offers to agree a payment plan. Splitting a large bill into weekly or monthly payments is often better than waiting months for nothing. Confirm any plan in writing.

Step 5: The final reminder

If you've still heard nothing, send a final reminder. It's firm and clear, and says you may need to consider other ways to recover the debt if you don't hear back by a set date. Stay polite. Anything you write may be read later by someone else, including a judge.

Your rights with business customers

If your customer is a business, GOV.UK explains that you can usually claim statutory interest on late commercial payments. It's 8% plus the Bank of England base rate for business-to-business transactions, unless your contract sets a different rate. You may also be able to claim fixed debt recovery costs:

These rules apply to business customers, not homeowners. Read the GOV.UK guide to late commercial payments before claiming them.

If they still won't pay

You have a few options:

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Frequently asked questions

How long should I wait before chasing?

A few days after the due date is normal for a first reminder.

Can I charge interest to a homeowner?

The statutory interest rules on GOV.UK are for business-to-business transactions. For consumers, check your own terms and get advice before adding charges.

Should I keep working for a customer who owes me money?

Be cautious. Many tradespeople pause new work until the account is up to date, and tell the customer politely why.

This guide is general information, not tax or legal advice. Rules change, so check GOV.UK for the latest position.

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