Late Payment Interest Calculator is a practical tool built to help individuals, professionals, and small businesses in England & Wales navigate a specific legal or administrative task. Statutory interest (Bank of England base + 8%) and fixed compensation (£40 / £70 / £100) under the Late Payment of Commercial Debts (Interest) Act 1998.
The calculator produces a defensible numerical estimate grounded in the statutory framework that applies to this scenario. It is intended to give users an educated ballpark before they engage a solicitor, attorney, or paid adviser. This tool does not replace professional advice, but it lets you walk into a mediation, negotiation, or filing prepared and informed.
Every output on this page is anchored to primary sources: statutes, regulations, and official government publications. The Official Sources block further down enumerates the exact citations used, so you can verify the underlying rule against the authority itself.
When to use this tool
- ▸Preparing a pre-action or pre-litigation matter before engaging counsel.
- ▸Verifying the deadlines, dollar amounts, or thresholds referenced in a letter you have received.
- ▸Modeling alternative scenarios (different rates, different dates, different classifications) to evaluate strategy.
- ▸Drafting supporting documentation for a filing, an insurance claim, or a settlement negotiation.
Methodology & statutory basis
The calculator applies the formulas and drafting conventions that flow from currently effective UK legislation and appellate authority. The citations appear in the Official Sources section below.
The output is a starting point. English case law leaves discretion to the trial judge, and county-court practice can vary.
Frequently asked questions
Does the output have legal force?
No. It is provided for information only and does not create a solicitor-client relationship. For a binding opinion, consult a licensed practitioner in your jurisdiction.
Are the sources current?
Our editorial team reviews the underlying statutes and regulations periodically. For matters in flux — active rulemaking, pending appellate decisions — verify the citation directly on the government website linked in the Official Sources block below.
Can I use the output in court?
The generated text is a draft. Before filing or serving, have it reviewed by counsel, particularly if it commits you to obligations or waives rights.
How is my data protected?
All calculations and document generation happen in your browser. No data you enter is transmitted or stored on our servers.
This resource is provided by The Legal Reference for informational purposes only and does not constitute legal advice. For complex or contested matters, retain a solicitor licensed in the relevant jurisdiction.