A client of mine, a sole trader running a small landscaping business in Sevenoaks, came into the office a few weeks ago looking shattered. ‘I’ve got more work than ever,’ he said, ‘but I can’t pay my supplier invoices this month.’ His profit and loss statement looked healthy. His bank account told a completely different story.
Cash flow problems in UK small businesses are more common than many owners realise. Research from the Chartered Institute of Credit Management shows that more than eight in ten SMEs have experienced cash flow difficulties, with the average business running into trouble almost eight times a year. Approximately 50,000 small businesses close annually because of cash flow, often despite being technically profitable.
The good news is that most cash flow problems give you warning signs before they become a crisis. Here are seven to watch for – and what to do about each one.
1. You’re profitable on paper but always short of cash
This is the most disorienting cash flow problem a UK small business can face. Your profit and loss statement looks fine, but your bank balance is perpetually low. The gap is almost always caused by timing: you’ve invoiced for work but haven’t been paid yet, or you’re holding stock you’ve paid for but not yet sold.
The fix: Set up a rolling 13-week cash flow forecast so you can see payment gaps before they hit. Cloud accounting software such as Xero, QuickBooks or FreeAgent can generate this automatically. Knowing a shortfall is coming six weeks out gives you options; discovering it on the day your supplier payment is due does not.
2. Customers are regularly paying late
Late payments are the single most common trigger for cash flow problems in UK small businesses, cited by more than a third of SMEs. The average payment delay currently stands at 32 days, meaning even customers who eventually pay are often doing so a month beyond your agreed terms.
The fix: Review your aged debtors report weekly, not monthly. Invoice promptly on the day work is completed, not at the end of the month. Set clear payment terms upfront and follow up the moment an invoice becomes overdue. Automated reminders through your accounting software remove the awkwardness and actually work. You also have the statutory right to charge interest on overdue invoices which can deter late payers and help get money owed into your bank account.
3. You’re relying on your overdraft as standard
An overdraft facility is a sensible safety net for occasional short-term gaps. When it becomes your default working capital, that’s a sign of a structural cash flow problem rather than a temporary one. The interest charges compound the issue, and it leaves you with no headroom for genuine emergencies.
The fix: Identify whether the root cause is late customer payments, overly generous supplier payment terms, or costs growing faster than income. Each needs a different response. If it’s a temporary seasonal issue, consider invoice finance to bridge the gap without the cost of a permanent overdraft.
4. You’re taking on more work but margins are shrinking
Revenue rising while cash flow stays flat or worsens is a classic sign that growth is being funded by cash rather than generating it. You might be taking on bigger jobs that require upfront costs, extending credit to win customers, or underpricing to compete.
The fix: Track your gross profit margin by job or customer, not just overall. Our blog on 7 essential KPIs to track walks through exactly how to do this. If certain customers or job types are consistently low-margin, you have a pricing conversation to have – or a decision to stop taking that work.
5. You’re not setting aside money for tax
Tax bills are the most predictable large expense a small business faces, which makes it all the more painful when they cause a cash flow crisis. Self Assessment payments on account, quarterly VAT bills, PAYE liabilities, and corporation tax deadlines are all known in advance. Missing them because the cash isn’t there is a warning sign that day-to-day cash management needs attention.
The fix: Set up a separate ‘tax pot’ account and transfer a percentage of every payment you receive into it automatically. A rough guide: if you’re a sole trader earning around £50,000, setting aside 25–30% covers most scenarios. If you run a limited company, talk to your accountant about the right split between salary, dividends and pension contributions to keep your overall tax liability as low as legitimately possible. If you are unable to pay your tax bill, contact HMRC to discuss a Time to Pay arrangement.
6. You have no visibility of what’s coming in and out next month
Running a business without a cash flow forecast is a bit like driving without a windscreen – you can see where you’ve been, but not what’s coming. If the question “will we be able to pay our bills next month?” makes you genuinely uncertain, that uncertainty is itself a warning sign.
The fix: A basic cash flow forecast doesn’t need to be complicated. List your expected income by week, list your committed outgoings – rent, payroll, loan repayments, supplier payments, tax – and look at the gaps. Reviewing this weekly takes twenty minutes and gives you early warning of problems when you still have time to act. Our spring cleaning your finances guide covers this as part of a broader financial health check.
7. You’re delaying payments to your own suppliers
When a business starts stretching its supplier payment terms to manage its own cash position, it’s usually a sign that cash flow problems in that UK small business have already reached a serious level. Beyond the practical risk of damaged supplier relationships, late payments can affect your credit rating and your ability to negotiate terms in the future.
The fix: Be proactive with suppliers rather than going quiet. Most will work with you on extended terms if you communicate early and honestly. At the same time, use this as a trigger to revisit your pricing, your payment terms with customers, and whether your cost base has crept up without a corresponding increase in revenue.
Getting cash flow back under control
Cash flow problems in UK small businesses rarely appear out of nowhere – the warning signs are almost always there first. The businesses cope best are the ones watching their numbers regularly, acting early, and talking to their accountant before things get critical rather than after.
At Adams Accountancy we help small businesses across Kent build financial systems that give them real visibility and early warning of potential problems. Whether you need help setting up cash flow forecasting, reviewing your pricing, or understanding your tax position for 2026/27, we’re here for a free, no-obligation chat. Call us on 01322 250001 or get in touch online.
About the author
Michelle Adams is a qualified accountant and director at Adams Accountancy, a friendly all-female practice based in Dartford, Kent. With over 15 years’ experience helping sole traders, landlords and limited companies manage their finances across Kent and beyond, Michelle specialises in turning financial complexity into practical, plain-English action. Call us on 01322 250001 or contact us online for a free consultation.
Frequently asked questions about tax rates for 2026/27
What are the income tax rates and thresholds for 2026/27?
For England, Wales and Northern Ireland, the income tax rates and thresholds for 2026/27 are unchanged from 2025/26. The personal allowance remains frozen at £12,570 – the amount you can earn before paying any income tax. The basic rate of 20% applies to taxable income between £12,571 and £50,270. The higher rate of 40% applies between £50,271 and £125,140, and the additional rate of 45% applies above £125,140. All thresholds are frozen until at least April 2031, which means fiscal drag continues to push more people into higher bands as wages rise. Scottish taxpayers pay income tax at different rates set by the Scottish Parliament.
What is the corporation tax rate for small businesses in 2026/27?
Corporation tax rates are also unchanged for 2026/27. Limited companies with profits of £50,000 or less pay at the small profits rate of 19%. Companies with profits above £250,000 pay the main rate of 25%. If your profits fall between those two thresholds, marginal relief applies, giving a gradual increase in the effective rate between 19% and 25%. For most small limited companies in Kent, the 19% rate will apply unless you’ve had a particularly strong year. Understanding your likely corporation tax bill well before it’s due is one of the most effective ways to manage your cash flow – take a look at our 2026/27 tax rates guide for the full picture.
Have dividend tax rates changed in 2026/27?
Yes – this is an important one for limited company directors who pay themselves through dividends. From April 2026, dividend tax rates increased for basic and higher rate taxpayers. Basic rate taxpayers now pay 10.75% on dividend income above the £500 annual allowance (up from 8.75%). Higher rate taxpayers now pay 35.75% (up from 33.75%). Additional rate taxpayers are unaffected at 39.35%. The £500 dividend allowance itself is unchanged. If you pay yourself a combination of salary and dividends, it’s worth reviewing your remuneration strategy with your accountant for this tax year, as the increased dividend rates may change the optimal split.
How do employer National Insurance changes in 2025 affect my cash flow planning for 2026/27?
From April 2025, employer National Insurance increased to 15% and the secondary threshold – the point at which employers start paying NI on each employee’s earnings – dropped from £9,100 to £5,000 per year. These rates are unchanged for 2026/27. The practical effect is that the employer NI cost per employee has risen, particularly for businesses with lower-paid or part-time staff. The Employment Allowance, which offset the first £10,500 of employer NI for eligible businesses, provides some relief, but many small employers are still carrying a higher payroll cost than before April 2025. If you’re feeling that pressure on cash flow, revisiting your payroll structure and checking your Employment Allowance eligibility is a sensible first step.