01
A link, not a lecture
Generate a live clock for that invoice and send it. The client sees interest accruing at the statutory daily rate — 11.75% a year on a newly overdue invoice (Bank Rate 3.75% as at 3 Sep 2026, held since 18 Dec 2025).
England & Wales · B2B invoices
Send them a clock.
Watch the invoice get more expensive.
StillOwed is a live statutory-interest clock for overdue UK business invoices. 8% + Bank of England Bank Rate (30 June / 31 December rule), plus £40 / £70 / £100 compensation. You email the link. They see the total moving. Then you download the chase emails and the Letter Before Action. £19 once. Not a law firm. Not legal advice.
How it works
A link, not a lecture. The number ticks. Then you send the letter.
02
The number the 1998 Act actually uses
8% above Bank Rate frozen from 30 June or 31 December, not this morning’s headline. Compensation £40 under £1,000, £70 to under £10,000, £100 at £10,000+. B2B only.
03
The letter with the right deadline
Company client: 14-day Letter Before Action. Sole trader / individual: 30-day Letter of Claim (Debt Claims Protocol). Wrong clock, wrong letter, you can lose costs. Templates for England & Wales. Starting point, not legal advice.
Always free
The calculator, working, and live clock — every invoice.
£19 once
Unlock full letters, no watermark, print-ready.
Offline rates
Bank Rate history is embedded. No live feed required.
What you can claim
For qualifying commercial debts in England and Wales, the Late Payment of Commercial Debts (Interest) Act 1998 sets a default — unless your contract already provides a substantial remedy.
Statutory interest
8% above the Bank of England Bank Rate in force on the 30 June or 31 December before the debt became overdue. Calculated daily, 365-day year, from the day after the due date.
Fixed compensation
£40 if the invoice is under £1,000; £70 from £1,000 to £9,999.99; £100 at £10,000 and above. One sum per overdue invoice, not per day.
Late invoices are not a personality test. They are a number that goes up every day the Act already named. Send the clock. £19.
Questions
Short answers. This is a tool, not a solicitor.
Is this legal advice?
No. StillOwed is not a law firm and does not give legal advice. The calculator applies the statutory formula as commonly understood; the letters are starting drafts. If the amount is large, the facts are messy, or court is likely, speak to a solicitor.
Who can use the statutory scheme?
It is aimed at business-to-business contracts for the supply of goods or services, in England and Wales. Consumer debts and many private individuals are outside this tool. Scottish and Northern Irish rules can differ — do not rely on this app there.
What if my contract already charges interest?
A contractual interest or late-payment clause that is a substantial remedy may replace the statutory scheme. StillOwed calculates the statutory figures only. Check the contract before you demand statutory interest.
How is Bank Rate chosen?
The reference rate is the Bank Rate in force on the 30 June or 31 December immediately before the debt became overdue (the day after the due date). We embed an offline history, current as of 3 September 2026 (18 December 2025 decision: 3.75%). Dates before our earliest rate use that earliest rate, and the working says so.
The debtor is a sole trader or an individual. Is 14 days enough?
The Letter Before Action defaults to 14 days, which is a common starting point for company debtors. If the debtor is an individual, including a sole trader, the Pre-Action Protocol for Debt Claims may require a letter of claim, a 30-day response period, and extra enclosures. This template does not claim protocol compliance. Take advice and lengthen the deadline if needed.
Do I need a lawyer to send these?
You can calculate the figures and send a draft yourself. Starting a claim in court is a separate decision, with fees, procedure, and risk. StillOwed does not file anything and does not represent you.
Where is my data stored?
In this browser only (localStorage). There is no account and no server. Clearing site data deletes your invoices. Demo invoices load the first time so you can see the maths — they are labelled.
Send the clock
See the interest crawling on an overdue invoice. Pay £19 for the letters, or £39 and I’ll write the chase for you.