How to Write an Effective Overdue Invoice Letter

An overdue invoice letter is the point where a late payment stops being an oversight and starts being a decision. The 30-day terms passed a fortnight ago. The customer has gone quiet on email, and your accounts receivable ledger is carrying money you have already spent on materials and wages.

Getting the wording right matters more than most people expect, because a clear payment reminder that states the invoice number, the outstanding balance, the original due date and a specific new deadline gets paid far more often than a vague nudge.

Below we set out what to include at each stage of chasing, when to add statutory interest, and how to escalate once the letters stop working.

How to Write an Overdue Invoice Letter

Every business in the UK is affected by non-paying customers. Companies of all sizes in every industry must face this challenge daily, from freelancers to global corporate enterprises.

If a customer has not paid for goods or services that you have provided, it is important to act as soon as possible. If a debt recovery task is left for too long after an overdue invoice, your business’s cash flow could be affected.

Large corporate entities have dedicated accounts teams to handle matters when an invoice is overdue. Smaller businesses and those that are self-employed may not have the time or resources to do this themselves.

For businesses of this size, the managing director performs several job roles at once. If there are any overdue payments, it may not be an option for them to spend the necessary time chasing customers.

If this happens, the debt may be abandoned and the customer’s money will be lost. A good step that may help to ensure that you receive payment is to write an overdue invoice letter.

Our debt collection experts have listed the most effective piece of information you should include in your overdue invoice letter.

Top 5 Tips for Writing an Overdue Invoice Letter

If you have overdue payments from a customer, the best thing to do is to contact them. The best way you can do this is by sending a polite payment reminder letter.

Here are some tips from our debt collection experts to help you write an effective overdue invoice letter. Creating an invoice email template or letter template is a good idea, as this will help speed up your process.

Step 1 – Remain Calm and Composed

If you have not been paid for goods or services, you may be feeling annoyed and frustrated. This is completely understandable, but despite this, you must remain calm and composed.

Acting rashly at this point may make the debt collection process more difficult or give your customer grounds to withhold payment entirely. Instead, you should remain calm and work towards resolving the issue in the most professional manner possible.

A good overdue invoice letter should be a friendly reminder to the debtor that the invoice is overdue. A payment reminder email is also appropriate, but you should make sure to use a read receipt to ensure that the message has been seen.

Step 2 – Send the Letter at the Appropriate Time

The timing of the letter is important and can help the entire process if done properly. Sending it too early (as in, moments after the invoice is due) may antagonise the debtor as they may pay as soon as you have posted it.

Sending it too late may make the collections process harder. Instead, a good time to send the first letter is the next business day after the invoice is due.

In some cases (especially when dealing with larger companies), sending a follow-up letter a week after this is necessary. You should also follow this reminder letter at 30 days, 60 days and 90 days overdue.

Step 3 – Make Sure That All Invoice Details Are Easy to Understand

Many non-paying customers will go to great lengths to avoid paying an invoice. One tactic that is sometimes used is the claim that details on the overdue invoice letter were unclear, and so they cannot make a payment.

To prevent this from happening, make sure that the following details are clear and easy to understand:

• Invoice Number
• The amount that is owed
• The due date of the invoice (to help them pay on time)
• Your contact details
• Invoice payment terms
• Your payment details

Step 4 – Make it Easy for the Debtor to Pay

This may sound like a simple step, but include information on all possible ways that a debtor will be able to pay you on time. Include this information in your overdue invoice letter.

There are certain circumstances in which a debtor may not be able to pay. For instance, they may simply have fallen into financial difficulty and have no money to pay.

If this happens, setting up an alternative option such as a payment plan will help to resolve the matter amicably.

Step 5 – Seek Professional Help

If your overdue invoice letters are having little effect, it is time to escalate the matter to a professional.Taking legal action is one course of action, but a far more cost-effective and productive option is to instruct a professional debt collection agency.

If you choose to do this, you should provide the debtor notice of intent in the last letter that you send to them.

Overdue Invoice Letter Template You Can Use Today

Keep the letter on one page and lead with the numbers. The debtor should be able to see the invoice number, the amount and the deadline without reading a paragraph first.

Address it to a named individual with authority to release payment, not to “Accounts”. Send it by email and post on the same day, then keep the delivery confirmation because that record matters if you later issue a claim.

First, Second and Final Reminder: How Many Letters to Send

Three letters is the practical limit, and each one should sound different from the last. A first reminder around seven days past due can stay friendly and assume an administrative slip, because that is what it usually is.

The second reminder, at roughly 21 days, drops the assumption. State the total outstanding, reference the earlier letter and put a firm date on payment.

A final demand at 45 to 60 days should name the consequences explicitly: interest applied, the credit account suspended and the file placed with a collection agency.

Beyond three letters, you are simply telling the debtor that nothing happens when they ignore you. In our experience, recovery rates start dropping noticeably once an invoice passes 90 days.

Adding Statutory Interest and Compensation to an Overdue Invoice

On business-to-business invoices, you are entitled to charge statutory interest at 8% above the Bank of England base rate, calculated daily from the day after payment fell due. That entitlement exists whether or not your contract mentions it.

You can also add fixed compensation for the cost of chasing: £40 on debts under £1,000, £70 on debts between £1,000 and £9,999.99, and £100 on debts of £10,000 or more. This applies per invoice rather than per account.

Set the figures out in the letter with the daily rate shown, so the debtor can see the balance increasing while payment remains outstanding.

Consumer debts work differently and only carry interest where your terms and conditions provide for it, so check the agreement before applying anything.

Mistakes That Weaken Your Position Before Court

The wording that feels satisfying to write is often the wording that costs you later. Threatening bailiffs, court action you have no intention of taking, or credit blacklisting you cannot deliver undermines every letter that follows.

It may also breach consumer protection law where an individual is involved.

Two other errors come up repeatedly on files placed with us. The first is sending reminders to a general inbox with no named recipient.

The second is quietly writing off part of the balance to encourage payment, which hands the debtor an argument that the sum was always in dispute.

Where the debtor is an individual or sole trader, the Pre-Action Protocol for Debt Claims applies before you issue proceedings. A standard reminder letter will not satisfy it.

Get that stage wrong and the court can penalise you on costs even when you win.

When the Overdue Invoice Letter Has Not Worked

Silence after a final demand tells you something useful. A customer who cannot pay usually makes contact and asks for time, while a customer who will not pay stops answering altogether.

A late dispute is the other common response, typically raised for the first time weeks after the work was signed off.

Ask for the objection in writing with specific details. A genuine dispute is often resolvable, while a manufactured one usually collapses once it has to be put on paper.

Either way, further letters from you carry no additional weight. To discuss an unpaid invoice and what is realistically recoverable, call our new business team on 0333 043 4425.

How to Recover Money from an Overdue Invoice – Instruct a Debt Collection Agency

If you have sent a letter requesting payment of an overdue invoice multiple times to no effect, the best course of action is to instruct a debt collection agency. A professional agency will be able to recover your unpaid invoice promptly and at a low cost.

Frontline Collections is one such agency, and since 2005 we have helped businesses recover money that is owed to them. This allows small business owners and those who are self-employed to focus on activities that grow their businesses.

If you are having issues with overdue payments, speak to one of our friendly debt collection experts for a free pre-action debt assessment.