How to deal with late-paying customers (UK, 2026)

Updated July 2026 · a guide, not advice

Frequently asked questions

Can I charge interest on a consumer (homeowner) invoice?
Not under the Late Payment Act — that covers business-to-business debts. You can only charge a homeowner interest if it was agreed in writing beforehand and is fair. Most trades use deposits instead.
Does statutory interest apply if the customer is a partnership?
Yes. It applies to all business entities — sole traders, partnerships and limited companies. If unsure, ask for a business or VAT number.
What if the customer disputes the amount owed?
That's a quality dispute, not just a late payment, and Money Claim Online assumes the debt is undisputed. Document your work thoroughly (photos, site notes, emails) and consider mediation or a full County Court hearing.
Can I add interest to an overdue invoice retroactively?
For a business debt, yes — the Act gives you the right automatically, even if you didn't mention it originally. It's cleaner (and gets paid faster) to set it out in a formal reminder letter.

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