Late payment interest

Charge interest on late payments in the UK

When a business client pays late, UK law lets you charge statutory interest and a fixed compensation on top of the invoice. Here’s what you’re owed, and how Sendinvo works it out and drafts the invoice for you.

Your first 3 invoices are free to send, no card needed.

The law

What you’re entitled to

If you run a UK business and another business pays you late, the Late Payment of Commercial Debts (Interest) Act 1998 is on your side. It entitles you to charge interest on the overdue amount, plus a fixed sum to cover the cost of chasing it. It covers business-to-business invoices, not sales to consumers.

Statutory interest

You can charge the Bank of England base rate plus 8% a year. It’s simple interest on the amount still owed, and it runs from the day after payment was due right up until the invoice is paid. So a debt that’s twice as old, or twice as large, is owed twice the interest.

Fixed compensation

On top of the interest, the Act lets you add a fixed sum for the trouble of a late payment, set by the size of the debt:

  • £40 for a debt under £1,000
  • £70 for a debt of £1,000 up to £10,000
  • £100 for a debt of £10,000 or more

You don’t have to charge any of this, and many people waive it for a good client. But it’s yours to claim, and knowing the figure changes the conversation. This page is general information, not legal advice.

How Sendinvo does it

The maths, done for you

Working this out by hand means counting days, applying a rate, and finding the right compensation band. Sendinvo does it the moment an invoice goes overdue.

It shows what you’re owed

Open an overdue sterling invoice in Sendinvo and you’ll see the statutory interest accrued so far, updated to today, alongside the fixed compensation for that debt’s size. It’s there to help you decide whether to charge it; it isn’t printed on the original invoice.

One click drafts the interest invoice

Decide to charge it and one click drafts a separate invoice to the same client, with two lines, the interest and the compensation, referencing the original invoice number. It’s a fresh draft you review and send. Your original invoice is never touched.

You set the base rate

The Bank of England base rate is a setting you keep in step yourself, not a live feed, so the figure Sendinvo uses is always one you’ve chosen. Update it in settings whenever the base rate moves.

Worked example: a £4,000 invoice, 60 days late
Outstanding balance £4,000.00
Days overdue 60
Interest rate (4% base + 8%) 12% a year
Statutory interest to date £78.90
Fixed compensation £70.00
You can invoice £148.90

Figures update to today’s date, using the base rate you’ve set.

Questions

Good to know

Can I legally charge interest on a late invoice in the UK?

Yes. When another business pays you late, the Late Payment of Commercial Debts (Interest) Act 1998 entitles you to statutory interest plus a fixed compensation sum, on top of the amount owed. It applies to business-to-business invoices, not to consumers. This is general information, not legal advice.

How much interest can I charge on a late payment?

Statutory interest is the Bank of England base rate plus 8% a year. It’s simple interest on the amount still owed, running from the day after payment was due until it’s paid.

What is the fixed compensation for a late payment?

On top of interest, the Act allows a fixed sum by debt size: £40 for a debt under £1,000, £70 for £1,000 up to £10,000, and £100 for £10,000 or more.

Does Sendinvo track the Bank of England base rate for me?

No. The base rate is a setting you keep in step with the Bank of England yourself, not a live feed. Sendinvo uses whatever rate you’ve set to work out the interest, so you stay in control of the figure.

Does charging interest change my original invoice?

No. On an overdue sterling invoice, Sendinvo shows the interest accrued so far and the compensation due, and one click drafts a separate interest invoice to the same client. It’s a fresh draft you review and send; your original invoice is left exactly as it went out.

Late payment has a price. Charge it.

Let Sendinvo work out the interest and compensation you’re owed, and draft the invoice in a click.