Download · £12

Chase a late business invoice with the right numbers and the right words

A calculator for statutory late-payment interest and the fixed recovery sum, an invoice log, five chaser emails, an invoice clause, a checklist and a one-page guide to the rules. For invoices to other businesses in the UK.

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Instant download · £12 one-off · Excel and Google Sheets

Cover image: the late payment calculator with example data, and a list of what is included

Images show the real files with example data.

What's in the download

Late-payment calculator (XLSX): enter the invoice amount and dates and it works out the due date, days late, the statutory rate, interest so far, the fixed sum (£40, £70 or £100) and the total. Includes a log for up to 200 invoices.
Rates tab: Bank of England Bank Rate on each 30 June and 31 December reference date, checked on 1 November 2026, with steps for updating it.
5 chaser emails (Word and plain text), from a friendly reminder to a final request, written to sound like a person.
Invoice and quote clause (Word and plain text) so your payment terms are clear from the start.
Chasing checklist (PDF and Word) and a one-page guide to the rules (PDF) with GOV.UK links.

No macros. It works in Excel, LibreOffice and Google Sheets (upload the file to Google Drive and open it with Google Sheets).

How the numbers work

Under the Late Payment of Commercial Debts (Interest) Act 1998, when another business pays you late you can usually claim interest at 8% a year above the Bank of England base rate, plus a fixed sum for each invoice: £40 for debts under £1,000, £70 for £1,000 to £9,999.99 and £100 for £10,000 or more. The rate for a debt is fixed by the base rate on 30 June or 31 December before the payment became late. You can't use statutory interest if your contract sets its own late-payment interest. See GOV.UK: late commercial payments.

The Commercial Payments Bill would change some of these rules. It is a proposal, not law, so the kit works on the current rules and tells you where to check for changes.

Who it's for

Sole traders, freelancers and small firms in England, Wales, Scotland and Northern Ireland who invoice other businesses. It isn't for invoices to consumers (members of the public). The statutory interest rules don't cover those.

General information to help you, not legal advice. For a large or disputed debt, get advice, for example from Citizens Advice, a solicitor or your trade body.

The calculator and the Rates tab with example data

Two of the five chaser emails

UK Late Payment Chaser Kit

£12 one-off

Buy · £12

Prices in pounds sterling (GBP), one-off, no subscription. If VAT applies, it will be shown before you pay. Checkout on this site is for buyers in the UK. Secure card payment by Stripe; after paying you go straight to your download page. By ordering you agree to our terms, including that you lose the 14-day right to cancel once the download is made available.

FAQ

Does it work in Google Sheets?

Yes. Upload the XLSX to Google Drive and choose Open with, then Google Sheets. All the formulas are standard ones.

What happens when the Bank Rate changes?

The rate for each debt is fixed by the reference date before it became late. Add the new Bank Rate to the Rates tab after each 30 June and 31 December; the steps are on that tab.

Will it get me paid?

We can't promise that. It helps you work out what you can ask for and gives you clear wording. Whether and when you are paid depends on your customer.

How do I get the files?

Straight after payment, Stripe takes you to your download page. Save the ZIP to your computer. If anything goes wrong, email hello@rhinehartstudio.com with the email address you used at checkout.

Can I get a refund?

Because it's a digital download, you agree at checkout to get it straight away and that you then lose the 14-day right to cancel. If a file is faulty or not as described, email us and we'll fix it, replace it or refund you. See our terms.

How was it made?

We wrote and built it with help from AI tools, then checked every rate, rule and threshold against GOV.UK and the Bank of England. The sources are listed in the files.