News

At OMBA we believe that strong sales are only valuable when they translate into cash. For Irish SMEs, keeping a close eye on debtor days can provide an early warning that customer payments are taking too long and working capital is becoming stretched. A business can appear profitable on paper while still facing significant cash flow pressure if too much money remains tied up in unpaid invoices.

What Are Debtor Days?

Debtor days, also known as days sales outstanding, measures the average number of days it takes a business to receive payment from its customers.

The calculation can vary depending on the information available, but the basic principle is straightforward. If customers are taking longer to pay, more of your business’s money is sitting outside the business.

For example, a business with debtor days of 30 may generally expect to receive payment within around a month. If that figure gradually increases to 45 or 60 days, the difference can have a significant effect on working capital.

The important point is to monitor the trend. A single late payment may not indicate a problem, while a consistent increase in debtor days could signal that action is needed.

1. Strong Sales Can Create Cash Flow Pressure

One of the most common misconceptions among business owners is that increasing sales automatically improves cash flow.

Imagine an SME securing several large new contracts. Turnover increases, profits appear healthy and the sales pipeline looks promising. However, if those customers have payment terms of 60 days, the business may need to fund wages, suppliers, VAT, rent and other expenses long before the sales revenue arrives.

Rapid growth can therefore increase working capital requirements.

This is why debtor days should be considered alongside turnover and profitability. A business needs to understand not only how much it is selling, but how quickly those sales are converted into cash.

2. Review Your Debtor Days Regularly

Debtor days should not only be reviewed when cash becomes tight.

A monthly review can reveal whether customer payment behaviour is changing. Compare your current debtor days with previous months and, where possible, with your normal trading pattern.

Look for warning signs such as:

• The average time taken to receive payment is increasing

• More invoices are becoming overdue

• A small number of customers account for a large proportion of outstanding debt

• Customers are regularly exceeding agreed payment terms

• Credit notes and invoice disputes are taking longer to resolve

• Cash flow forecasts increasingly depend on customers paying on time

These trends can provide an opportunity to act before the problem becomes more serious.

3. Examine Your Payment Terms

Your payment terms have a direct impact on working capital.

Some SMEs continue using the same payment terms they established when the business was much smaller. As the business grows, these arrangements may no longer be appropriate.

Consider whether your payment terms reflect the size and nature of your business, the level of work involved and your own supplier payment obligations.

It is also worth reviewing whether customers clearly understand when payment is due.

Long payment terms may be commercially necessary in certain industries, particularly where larger customers have established procurement processes. However, they should form part of your financial planning.

If you regularly have to wait 60 or 90 days for payment while your own suppliers require payment within 30 days, the resulting working capital gap needs to be funded somehow.

4. Make Invoicing Faster and More Accurate

The payment clock cannot start properly until an invoice has been issued.

Delays in invoicing can therefore create unnecessary pressure on cash flow. If completed work sits waiting to be invoiced, the business is effectively providing credit to its customers without receiving any benefit for doing so.

Review your invoicing process and consider:

• How quickly invoices are issued after work is completed

• Whether invoices contain all required information

• Whether purchase order requirements are being followed

• How invoice disputes are handled

• Who is responsible for following up overdue accounts

• Whether customers receive reminders before and after the due date

Small improvements can make a meaningful difference when repeated across hundreds of invoices.

5. Identify Which Customers Create the Greatest Risk

Not all debtors present the same level of risk.

A customer who consistently pays within agreed terms is very different from one who regularly pays late or disputes invoices.

Review your debtor ledger by customer rather than looking only at the total figure. Ask whether a significant proportion of outstanding money is concentrated among a small number of customers.

Customer concentration can create additional exposure. If one major customer is responsible for a substantial share of outstanding invoices and begins taking longer to pay, the impact on cash flow can be considerable.

This does not necessarily mean that businesses should avoid large customers. It means the financial implications of customer concentration should be understood and managed.

What Should You Do If Debtor Days Are Rising?

If debtor days are increasing, start by identifying why.

There may be straightforward administrative problems, such as delayed invoicing or incorrect invoice details. In other cases, customers may be experiencing their own cash flow difficulties.

Review your aged debtor report and categorise outstanding balances by age. Pay particular attention to amounts that have moved significantly beyond agreed terms.

You may also need to revisit credit controls, payment terms and internal responsibility for debt collection.

The aim should be to create a consistent process rather than relying on occasional intervention when cash becomes tight.

Cash Flow Starts With Visibility

For Irish SMEs, debtor days are an important part of understanding working capital. They provide insight into how effectively revenue is being converted into cash and can highlight potential pressure before it appears in the bank account.

The key is to treat debtor days as a management measure rather than an accounting statistic.

A business that monitors payment behaviour, invoices promptly, follows up overdue balances and understands its working capital requirements is better positioned to manage growth and unexpected changes in trading conditions.

Strong turnover can create opportunities, but those opportunities need to be supported by cash. Reviewing debtor days regularly can help ensure that the money your business has earned arrives when you need it.

If you would like to discuss your business, contact us by email dm@omf.ie or visit omba.ie.

Disclaimer

This article is based on publicly available information and is intended for general guidance only. While every effort has been made to ensure accuracy at the time of publication, details may change and errors may occur. This content does not constitute financial, legal or professional advice. Readers should seek appropriate professional guidance before making decisions. Neither the publisher nor the authors accept liability for any loss arising from reliance on this material.