Hi, when I had this situation, I researched what to do and I found this on a UK governmet web site :
Late commercial payments - interest and debt recovery costs you can charge businesses for late payments
www.gov.uk
Here is an extract. It is for companies only I think but not sure. Mine was company to company.
Interest on late commercial payments
The interest you can charge if another business is late paying for goods or a service is ‘statutory interest’ - this is 8% plus the Bank of England base rate for business to business transactions. You cannot claim statutory interest if there’s a different rate of interest in a contract.
And here is an example of how to work it out:
If your business were owed £1,000 and the Bank of England base rate were 0.5%:
- the annual statutory interest on this would be £85 (1,000 x 0.085 = £85)
- divide £85 by 365 to get the daily interest: 23p a day (85 / 365 = 0.23)
- after 50 days this would be £11.50 (50 x 0.23 = 11.50)
Send a new invoice if you decide to add interest to the money you’re owed.
I mailed the accounts dept. of the company and told them a new invoice would be written after 30 days using these calculations and this worked for me. Did not have to action the threat.
Hope this helps
JohnC