Payment reminders that actually get you paid

Why most payment reminders fail

You have done the work. The invoice went out weeks ago. And now you are typing yet another "just a friendly reminder" email, half-expecting it to vanish into the same void as the last three.

Here is the uncomfortable truth: most payment reminders fail because they are too polite, too vague, or too late. A 2024 survey by the Federation of Small Businesses found that 62% of UK small businesses experienced late payment in the previous quarter. The average overdue period? 23 days past terms.

That is not a cash flow inconvenience. For a sole trader plumber or electrician, 23 days of unpaid invoices can mean choosing between buying materials for the next job or paying your own bills.

The 4-stage reminder sequence that works

After analysing payment patterns across thousands of invoices, a clear pattern emerges. Businesses that follow a structured reminder sequence get paid 11 days faster on average than those who send ad-hoc chases.

Stage 1: pre-due reminder (3 days before)

This is the one most tradespeople skip, and it is arguably the most powerful. A brief, professional note that says "your invoice is coming up for payment" does two things: it puts the payment back on their radar, and it removes any excuse of "I forgot."

Example: "Hi [Name], just a heads-up that invoice #1042 for £2,850 is due on Friday 14th March. If you have already arranged payment, please disregard this. Otherwise, bank details are on the invoice. Thanks, [Your name]"

Stage 2: due date reminder (day of)

Short and direct. No waffle. State the facts: invoice number, amount, that it is due today, and how to pay.

Stage 3: first overdue (7 days late)

This is where tone shifts from informational to expectant. You are no longer reminding, you are chasing. Reference the Late Payment of Commercial Debts (Interest) Act 1998, which entitles you to charge interest at 8% plus the Bank of England base rate on overdue B2B invoices.

You do not need to threaten. Simply mentioning your right to charge interest is usually enough to prompt action. At the current base rate of 4.5%, that is 12.5% annual interest, which on a £5,000 invoice works out to £1.71 per day.

Stage 4: formal demand (14+ days late)

If three reminders have not worked, it is time for a formal letter before action. This is a legal prerequisite before you can take someone to the small claims court for debts up to £10,000. The letter should state the total owed including any statutory interest, give 14 days to pay, and state that you will begin court proceedings if payment is not received.

Use our late payment interest calculator to work out exactly what you are owed, including the fixed compensation amount (£40-£100 depending on the debt size).

Writing reminders that get read

The subject line matters more than you think. "Payment reminder" gets a 12% open rate. "Invoice #1042 overdue - action required" gets 47%. Be specific. Include the invoice number and a clear call to action.

Keep the body short. Three to five sentences maximum for the first two stages. Your customer is busy too, and a wall of text is easier to defer than a punchy three-liner.

Always include the payment amount, invoice number, original due date, and your bank details or a payment link. Every piece of friction you remove increases the chance of same-day payment.

Automate the sequence

Setting up automatic reminders through your invoicing software means you never forget to chase, and it removes the emotional awkwardness of asking for money you have already earned. Configure your reminder schedule once and let it run.

What the law says about late payment

Under the Late Payment of Commercial Debts (Interest) Act 1998, you can charge:

This applies to all B2B transactions. If you are invoicing another business (not a consumer), you have these rights automatically. You do not need to include them in your terms, though doing so makes enforcement smoother.

When to pick up the phone

Email reminders work for most situations, but some customers need a call. If an invoice hits 14 days overdue and your emails have gone unanswered, a two-minute phone call often resolves things faster than another week of emails.

Keep it professional. "Hi [Name], calling about invoice #1042 which is now two weeks overdue. Is there an issue with the payment?" Most of the time, the answer is either "I forgot, I will do it now" or "there is a cash flow issue, can we arrange a payment plan?"

Both of those outcomes are better than silence. And if someone is genuinely struggling to pay, agreeing a payment plan in writing protects both parties.

Preventing late payment in the first place

The best reminder is one you never have to send. Here are practical steps that reduce late payment before it starts:

• Agree payment terms before starting work. Put them in your quote. 14 days is standard for trade work; 30 days for larger commercial jobs.
• Invoice on completion, not next week. Every day you delay invoicing adds a day to when you get paid. Use a mobile invoicing tool to send invoices from site.
• Take deposits on larger jobs. 25-50% upfront is normal for jobs over £1,000. It also filters out clients who were never going to pay. Our quote generator lets you specify deposit amounts clearly.
• Offer multiple payment methods. Bank transfer, card payment, even a payment link in the invoice. The easier you make it, the faster it happens.
• Check credit before big jobs. For commercial contracts over £5,000, a basic credit check through Companies House takes five minutes and can save you months of chasing.

Frequently asked questions

Can I charge interest on late invoices from day one?

For B2B invoices, statutory interest starts from the day after the agreed payment date. If no date was agreed, it starts 30 days after the invoice date or delivery of goods/services, whichever is later.

How many reminders should I send before taking legal action?

There is no legal minimum, but courts look favourably on businesses that have made reasonable attempts to collect before issuing proceedings. Three to four reminders over 30 days, followed by a formal letter before action with 14 days notice, is considered good practice.

Do I need a solicitor to send a letter before action?

No. You can write and send it yourself. It needs to state the amount owed, reference the original invoice, set a deadline (usually 14 days), and state your intention to issue court proceedings. Templates are available on the gov.uk money claims page.

What is the small claims court limit in 2026?

For England and Wales, the small claims track handles claims up to £10,000. You can file online through Money Claims Online for a fee starting at £35 for claims up to £300, scaling up to £455 for claims between £5,001 and £10,000.

Should I stop work if a client has not paid a previous invoice?

You are within your rights to. If you have a contract, check the terms around suspension of services. If there is no written contract, you can still refuse to continue work until outstanding invoices are settled. Put it in writing so there is a clear record.