The Hidden Value Killer: Slow-Paying Customers

Ask most business owners why cash is tight, and they’ll assume it’s because they don’t have enough capital.

In reality, it’s much more often a working capital problem. The money is coming, just too slowly, or going out too fast.

That’s good news, because working capital problems are usually fixable without borrowing a penny. In this post, we’ll look at why cash gets stuck, how big the problem really is, and the three habits that free it up.

Capital Problem or Working Capital Problem?

The two sound similar, but they’re very different issues.

A capital problem means your business genuinely doesn’t have enough money to operate or grow. It might need investment, a loan or new funding.

A working capital problem means the money exists on paper, but it isn’t in your bank account when you need it. You’ve done the work and sent the invoice. Meanwhile, your suppliers, staff, landlord and HMRC all expect to be paid on time.

The gap between money going out and money coming in is where many profitable businesses get into trouble. You can be making a healthy profit and still struggle to make payroll at the end of the month.

The Scale of the Problem

This is bigger than most people realise. Research commissioned by the UK’s Small Business Commissioner found:

• Late payment costs the UK economy around £11 billion a year.
• Roughly £26 billion sits owed to businesses in unpaid invoices at any given time.
• Affected businesses lose an average of 86 hours a year simply chasing money they’re already owed.

Think about that last figure. Eighty-six hours is more than two full working weeks spent on awkward emails and phone calls. That is time you could have spent serving customers, improving your service or winning new work.

And the hours are only part of the cost. Every day an invoice sits unpaid is a day you’re effectively giving your customer an interest-free loan, funded by your business.

How a Small Delay Becomes a Big Cash Gap

Here’s a simple example.

You finish a job on the 3rd of the month but wait until month-end to send the invoice. Your customer’s terms are 30 days from receipt, and they pay a week late.

That means you receive your money around 5 to 6 weeks after finishing the work. During that time you’ve paid for materials, wages and overheads out of your own pocket.

Multiply that across a dozen customers, and you have a serious gap between cash out and cash in. It isn’t caused by a lack of sales or profit. It’s caused by timing, and timing is something you can control.

Invoice the Moment the Work Is Done

The single easiest improvement is to stop waiting for month-end.

Many businesses batch their invoicing into a monthly admin session because it feels tidier. But every day you wait to invoice adds a day before you get paid. The payment clock doesn’t start until the invoice lands in your customer’s inbox.

To speed things up:

• Invoice on completion. Send the invoice the same day the work is finished, or the goods are delivered.
• Use accounting software. Tools such as Xero, QuickBooks or Free Agent let you create and send invoices in minutes, straight from your phone.
• Make invoices easy to pay. Include your bank details, a clear due date and, where possible, an online payment link.
• Get the details right. Include the correct purchase order number, contact name and address. A wrong reference is a common reason for delays.

If you bill for ongoing work, consider stage payments or deposits, so you’re not funding an entire project before seeing a penny.

Agree Payment Terms That Suit Your Cash Cycle

Many owners simply accept whatever terms a customer proposes, especially with a larger client. But payment terms are a negotiation, and they should reflect your costs, not just the customer’s convenience.

Ask yourself: when do my own bills fall due? If you pay suppliers and staff within 14 days but wait 60 days to be paid, you’re carrying a permanent funding gap.

Some practical steps:

• Set your standard terms in advance. State them clearly on quotes, contracts and every invoice.
• Shorten where you can. Terms of 14 days rather than 30 can transform your cash position.
• Ask for deposits or upfront payment on new customers and larger projects.
• Consider early payment incentives. A small discount for paying within a week can be cheaper than the cost of waiting.
• Check new customers. A quick credit check before you agree generous terms can save a lot of pain later.

Remember that terms agreed at the start are far easier to enforce than terms you try to tighten halfway through a relationship.

Chase Overdue Accounts Promptly and Assertively

This is the habit most owners find hardest. Chasing money can feel awkward, especially with customers you like. So invoices slide, and a few days late becomes a few weeks.

But you’re not being pushy. You’re simply asking for what you’re owed, under terms you both agreed.

A simple credit control routine helps take the emotion out of it:

1. Before the due date: Send a friendly reminder a few days ahead, confirming the invoice has been received and there are no queries.
2. On the due date: If payment hasn’t arrived, follow up the next working day.
3. One week overdue: Phone the customer. A real conversation often uncovers the problem quickly, whether it’s a missing PO number or a stuck approval.
4. Two to three weeks overdue: Send a formal written reminder, referencing your terms and your right to charge interest.
5. Beyond that: Pause further work or supply until the account is settled, and consider a formal letter before action.

The key is to be consistent. Customers quickly learn which suppliers chase and which don’t, and they tend to pay the ones who do first.

Know Your Rights on Late Payment

UK businesses have legal protection here that many owners don’t use. Under the Late Payment of Commercial Debts (Interest) Act 1998, you can claim statutory interest on overdue commercial invoices, plus a fixed sum in compensation for the cost of recovery.

You don’t have to exercise these rights every time, and sometimes goodwill matters more. But simply stating on your invoices that you reserve the right to claim them often encourages faster payment. Check the current rates and rules on GOV.UK before quoting figures to a customer.

Build a Simple Weekly Cash Routine

Good habits stick when they’re part of a routine. Set aside 30 minutes each week to:

• Review your aged debtors report, which shows who owes you what, and for how long.
• Send reminders and make chasing calls.
• Check your cash flow forecast for the next 8 to 12 weeks.
• Flag any large payments coming up that you’ll need to cover.

Half an hour a week is a small investment compared with 86 hours of reactive chasing.

The Bottom Line

None of this costs anything. All of it adds up.

Most cash problems aren’t a shortage of money. They’re a shortage of good invoicing and credit control habits. UK late payments cost businesses an estimated £11 billion a year, and fixing your own habits is free.

Start with one change this week. Invoice the moment the next job is done, and see how quickly your cash position improves.

How H&Hendricks Can Help

Fixing invoicing, payment terms and credit control is exactly the kind of practical, fast-payback improvement covered under H&Hendricks’ Optimising Performance service.

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Ashley Bancroft is a founding Partner of H&Hendricks. A qualified Chartered Accountant and specialises in finance, strategy and entrepreneurship, with particular focus on value creation.