®
For millions of UK small businesses, late payment is not an occasional inconvenience — it is a structural threat. The Federation of Small Businesses estimates that late and non-payment costs UK SMEs approximately £23.4 billion every year in lost cash flow, with the average small business owed around £25,000 in overdue invoices at any one time. Around 50,000 businesses are thought to close annually because of poor payment practices by larger clients. Understanding your rights and having a clear action plan is essential.
1. The scale of the late payment problem
Research from Xero and the British Business Bank consistently shows that the average invoice is paid 18 days late in the UK, despite standard payment terms of 30 days. Construction, recruitment, and professional services are among the worst-affected sectors. For a sole trader or micro-business with a small cash reserve, a single late payment of £5,000 or £10,000 can make it impossible to meet payroll, pay suppliers, or cover HMRC obligations.
The harm compounds over time: chasing debt consumes management time, strains client relationships, and forces businesses into expensive overdraft facilities or emergency borrowing — all costs that the late payer never sees.
2. Your legal rights: the Late Payment of Commercial Debts Act 1998
UK law gives businesses meaningful statutory rights when a commercial client pays late. Under the Late Payment of Commercial Debts (Interest) Act 1998, as amended, you are entitled to:
- Statutory interest at 8% over the Bank of England base rate, calculated daily from the day after the payment deadline passes.
- Fixed compensation of £40 for debts up to £999.99, £70 for debts between £1,000 and £9,999.99, and £100 for debts of £10,000 or more — automatically, per invoice.
- Reasonable recovery costs beyond the fixed sum if your actual costs of recovering the debt exceed the fixed amount (for example, solicitor or debt recovery agency fees).
These rights apply automatically to business-to-business transactions unless you have contractually agreed different terms — and even then, courts can override terms that are grossly unfair to the smaller party. You do not need to have stated these rights in your original contract for them to apply.
3. Practical steps before the debt becomes a problem
Prevention is always cheaper than cure. Before you raise an invoice:
- Agree payment terms in writing before work begins — ideally 14 or 21 days rather than 30, since larger clients frequently take the full term as a minimum.
- Include your bank details, a unique invoice reference, and the exact due date on every invoice. Vague invoices ("due within a reasonable time") create disputes.
- Set up automatic email reminders at 7 days before the due date and on the due date itself. Most accounting packages (Xero, QuickBooks, FreeAgent) do this for free.
- For larger projects, invoice in stages — never deliver 100% of the work before receiving any payment.
4. What to do when payment is late: the escalation path
If payment is missed, move through a clear escalation sequence rather than waiting indefinitely.
- Friendly payment reminder (day 1 overdue). A brief, polite email referencing the invoice number and amount. Most late payments are administrative rather than deliberate and resolve at this stage.
- Formal written demand (7–14 days overdue). A letter or email on headed paper stating the amount owed, the due date, the statutory interest now accruing, and your intention to pursue the debt if payment is not received within a specified period (7 days is reasonable).
- Statutory demand (for debts over £750). A formal statutory demand served under the Insolvency Act 1986 can pressure a solvent debtor: if they do not pay within 21 days, you may apply to wind up a company or bankrupt an individual. This step is best taken with brief legal advice.
- Small Claims Court (debts up to £10,000 in England and Wales). Online claims can be filed at gov.uk/make-court-claim-for-money for a relatively modest fee (scaled to the debt size). A court judgment, if unpaid, can be enforced through bailiffs, charging orders, or attachment of earnings.
- Debt recovery agency or solicitor. For larger or more complex debts, a specialist commercial debt recovery firm will pursue the debt on a fixed-fee or commission basis. Reasonable recovery costs can be added to the statutory interest and compensation claim under the 1998 Act.
5. Bridging the cash-flow gap while you wait
Even with the strongest legal position, recovering a debt takes time. In the meantime, your business still has obligations to meet. Several short-term finance options can bridge the gap:
- Invoice finance: Rather than waiting for a client to pay, an invoice finance provider advances you up to 90% of the invoice value within 24–48 hours of raising it. The remaining balance (minus fees) is released when the client pays. This is one of the most effective tools for businesses with slow-paying commercial clients, particularly in B2B sectors.
- Selective invoice discounting: A variant of invoice finance where you choose which invoices to advance against, rather than your entire ledger — useful if only one or two clients are causing the problem.
- Short-term business loans: A cash flow loan secured against your business's turnover or assets can tide you over a difficult period. Terms are typically 3–18 months and can be arranged quickly compared to traditional bank lending.
- Business overdraft or revolving credit facility: If your bank relationship allows it, a pre-agreed overdraft facility is the cheapest bridge for short gaps — but is often unavailable to newer businesses.
Whichever route you use, the cost of short-term finance is almost always lower than the cost of missing your own payments to suppliers or HMRC.
6. Prevention: improving payment terms for future clients
The most durable solution is to make late payment structurally harder for clients. Consider:
- Requiring a deposit of 30–50% upfront for new clients or project-based work.
- Shortening standard terms to 14 days and making 30-day terms a negotiated exception rather than a default.
- Including a clause in your contracts making the Late Payment Act's statutory interest and compensation amounts explicitly payable — this removes any ambiguity and signals that you will enforce your rights.
- Running basic credit checks on new business clients before extending credit terms.
- Removing payment friction: offer bank transfer, faster payments, and card payment options to eliminate the "I haven't had time to set up the payment" excuse.
Frequently asked questions
Can I charge interest on a late invoice without having stated this in my contract?
Yes. Statutory interest under the Late Payment of Commercial Debts Act 1998 applies automatically to business-to-business transactions from the day after the due date, regardless of whether it appears in your contract. The rate is 8% above the Bank of England base rate, applied daily.
What if my client disputes the invoice?
A genuine dispute over the quality of work or the amount owed is a separate matter from late payment and must be resolved on its merits — courts will not enforce a disputed debt without evidence. However, a client who raises a dispute only after the due date has passed, or disputes only part of the invoice, must still pay the undisputed portion on time. Document all communications carefully in case the matter proceeds to court.
Is invoice finance available to very small businesses?
Yes. Many UK invoice finance providers work with businesses turning over as little as £50,000 per year, and some specialist lenders have no minimum turnover requirement. Eligibility is primarily based on the creditworthiness of your debtors (your clients) rather than your own balance sheet, which makes it accessible to early-stage businesses that might not qualify for a traditional loan. See our guide to invoice finance for more detail.