How to chase a late invoice without losing the client

Waiting for a client to pay is the absolute worst part of running a business in the UK. Whether you are a solo freelancer or scaling a small agency, late payments throttle your cashflow and force you into the awkward role of debt collector. The challenge is chasing that cash without sounding desperate or nuking a valuable relationship that might yield more work down the line.

The psychological barrier: Why we hate chasing money

Most UK founders suffer from a terminal case of politeness. We worry that asking for the money we have already earned will make us look unprofessional or difficult to work with. In reality, the opposite is true. Professional outfits pay on time, and they expect their suppliers to have robust credit control processes in place.

Late payments are rarely personal. It is usually a case of a lost PDF, an overwhelmed accounts department, or a simple oversight. Approaching the situation with the assumption that it was a mistake—rather than a malicious act—allows you to be firm but fair. If you act like your invoice is optional, your client will treat it like it is.

"I used to wait weeks before sending a reminder because I didn't want to annoy my biggest clients. Now I send an automated nudge the day after it’s due. It hasn't lost me a single contract, but it has saved my bank balance."

Setting the stage: Prevention is better than a cure

The chase starts before you even send the invoice. Clear terms of service are your best friend. In the UK, if you do not agree on a payment date, the law sets a default of 30 days. However, as a small business, you are well within your rights to request 7, 14, or even 'due on receipt' terms.

• Include your bank details (sort code and account number) clearly on every invoice.
• State the exact 'Due Date' in bold, not just the 'Invoice Date'.
• Ask for a specific PO (Purchase Order) number if the client is a larger organisation.
• Mention your right to charge interest under the Late Payment of Commercial Debts (Interest) Act 1998.

To keep your finances segregated and easily trackable, many UK founders use a Tide business account. It's free to set up, and you can get a £200 bonus when you use the code REFER200 and spend £1,000 within your first 30 days. Having a dedicated business account makes it much easier to spot when a payment hasn't hit your balance on the deadline.

The Escalation Ladder: Three email templates

You need a standard operating procedure for late payments so you don't have to rewrite these emails from scratch every time. We recommend a three-stage approach that builds pressure over a 14-day window.

Reminder 1: The 'Just checking in' (1-3 days late). This should be short and helpful. 'Hi Team, just checking you received Invoice #123 sent on the 1st? It was due yesterday. Let me know if you need any further info to process this!'

Reminder 2: The 'Formal nudge' (7 days late). This is firmer. 'Hi [Name], our records show that Invoice #123 is now one week overdue. Please confirm when we can expect the payment of £[Amount] to reach our account. Many thanks.'

Reminder 3: The 'LBA Lite' (14 days late). Here, you mention the law. 'Dear [Name], Invoice #123 is now 14 days overdue. Please note that under the Late Payment of Commercial Debts (Interest) Act 1998, we are entitled to charge statutory interest and debt recovery costs. We would prefer to settle this cordially, so please ensure payment is made within 48 hours to avoid these charges.'

Calculating statutory interest and compensation

UK law is actually very supportive of small businesses here. You have a legal right to charge interest at 8% above the Bank of England base rate, plus a fixed sum for the cost of recovering the debt. For the 2025/26 tax year, let's look at how this works in practice.

You don't always have to actually charge this, but mentioning that you have the right to do so is often the 'silver bullet' that gets an invoice paid instantly. It signals that you are not a hobbyist, but a professional organisation that understands British commercial law.

When to pick up the phone

If emails are being ignored, it's time for a 'friendly' phone call. Screens make it easy for people to hide; voices make it much harder. Do not call the CEO immediately if it's a large company; call the accounts payable department first. They are usually just following a system and will be happy to move your invoice to the top of the pile if you are polite.

If you're a solo founder, you might find it helpful to create a 'Finance Manager' alias. Sending a chaser from 'accounts@yourcompany.com' instead of your personal name can take the 'sting' out of the interaction. It creates a barrier between the creative work you do and the cold mechanics of getting paid.

The Nuclear Option: Money Claim Online (MCO)

If you’ve reached the 30-day overdue mark and your calls are being dodged, it’s time for a Letter Before Action (LBA). This is a formal letter sent via recorded delivery stating that you will take legal action if the debt isn't cleared within 7 days. If that still fails, you head to the government's Money Claim Online portal.

• Claims can be made for amounts up to £100,000.
• Fees start from £35 for small claims and scale based on the debt amount.
• The mere act of a court summons arriving in the post is usually enough to make even the most stubborn client pay up immediately.
• If you win, the debtor will also be ordered to pay your court fees.

Managing your cashflow in the meantime

A late invoice can be more than an annoyance—it can be a threat to your ability to pay your own bills or your HMRC Self Assessment. While you wait for that bank transfer to land, you need a buffer. Some founders use business credit cards to bridge the gap between finishing a project and receiving the funds.

Capital on Tap offers a business credit card specifically for UK SMEs with 1% cashback on all spend. If you sign up using code SETTINGUP, you can get 7,500 bonus points (worth £75) when you make your first transaction. This can be a tactical way to manage expenses like software subscriptions or VAT payments while you wait for a slow-paying client to get their act together.

The bottom line

Getting paid on time is a right, not a privilege. By setting clear terms, automating your reminders, and knowing your rights under the Late Payment Act, you take the emotion out of the transaction. If a client consistently pays late despite your new system, they aren't a 'great client'—they are a liability. Focus your energy on the clients who value your time as much as you do, and don't be afraid to use the legal tools provided by UK law to protect your livelihood.