A profitable month and an empty bank account are not contradictions - they happen all the time to early-stage UK businesses. If you are feeling cash flow pressure right now, the problem is almost certainly timing, not profitability. Money is owed to you. Bills are due. The gap between the two is causing real stress. This guide gives you a structured set of actions to close that gap - organised by how quickly they take effect.
Why Small Businesses With Profitable Months Still Run Out of Cash
Cash flow and profit measure different things. Profit tells you whether your business model works. Cash flow tells you whether you can pay your bills today.
You could invoice a client for a substantial amount in March, record it as income, and show a healthy profit for the month - but if that client pays in 60 days, the cash does not land until May. Meanwhile, your supplier wants paying in April, your VAT return is due, and your rent does not wait.
Cash flow vs profit
Profit is the difference between your income and your costs over a period. Cash flow is the movement of actual money in and out of your business account. A business can be profitable on paper and still be unable to meet its obligations if the timing of receipts and payments is out of sync.
The UK's late payment culture makes this worse for small businesses. Large clients routinely take 60 or 90 days to pay, even when your invoice terms say 30 - a 2025 GoCardless/FSB survey found nearly a quarter of UK small businesses regularly receive payments up to 60 days late. You delivered the work. You are owed the money. But the cash is not in your account.
The good news is that most early-stage cash flow problems are solvable without outside finance. The steps below start with what you can do this week and build toward changes that protect you long-term.
Short-Term Fixes: What You Can Do This Week to Improve Cash Position
When cash is tight right now, the first priority is accelerating money that is already owed to you. This is not about chasing awkwardly - it is about having a clear, systematic process.
Pull a list of every outstanding invoice. Know exactly who owes you, how much, and how overdue it is.
Contact the most overdue accounts first. A direct, polite email or call referencing the invoice number and due date is professional - not aggressive.
Offer a short-term payment plan for clients who genuinely cannot pay in full. Some cash now is better than none.
Send a statement of account to clients with multiple unpaid invoices. Sometimes invoices get lost in accounts payable queues.
For invoices significantly overdue, reference your statutory right to charge interest under the Late Payment of Commercial Debts Act 1998. You do not need to enforce it, but mentioning it can prompt faster payment.
The Late Payment of Commercial Debts Act
Under UK law, you have a statutory right to charge 8% above the Bank of England base rate on late commercial invoices (the base rate is currently 3.75%, giving an effective total rate of 11.75% - this will vary as the base rate changes).
You can also claim a fixed sum compensation - £40 for debts under £1,000, £70 for debts between £1,000 and £9,999, and £100 for debts of £10,000 or more - and reasonable recovery costs. You do not have to enforce these rights - but knowing you have them, and letting clients know you are aware of them, is a useful prompt for faster payment.
Late payment reform coming: In March 2026, the government announced plans to introduce a 60-day cap on payment terms, make statutory interest mandatory in all commercial contracts, and give the Small Business Commissioner new powers to fine persistent late payers. Legislation is expected in late 2026 or 2027. The current rights under the 1998 Act remain in force in the meantime — and are worth using now.
Invoicing and Payment Terms: The Changes That Have the Biggest Impact
The single biggest invoicing mistake early-stage business owners make is delay. Work gets delivered, life gets busy, and the invoice goes out three days - or a week - later. Every day of delay is a day added to when you get paid.
Send your invoice the moment the work is delivered or the milestone is reached. Not tomorrow. The same day.
State your payment terms clearly on the face of the invoice - not buried in terms and conditions. "Payment due within 14 days" in a visible position.
Use a specific due date, not just "14 days net". "Payment due [specific date]" is harder to ignore than an abstract terms period.
Include multiple payment methods - bank transfer details, and optionally a payment link if you use accounting software with that feature.
Follow up on day one after the due date, not after two or three weeks. A short, professional reminder the day after the due date is entirely reasonable.
Set a follow-up sequence: day 1 overdue (polite reminder), day 7 (firmer email), day 14 (phone call or formal notice).
Shortening your payment terms is also worth reviewing. If you currently offer 30 days, consider whether 14 days is workable for your client base. Many clients will simply pay within whatever terms you set.
How to Negotiate Better Terms With Suppliers Without Damaging the Relationship
Improving cash flow is not only about speeding up what comes in - it is also about managing the timing of what goes out. Extending payment terms with your suppliers gives you more breathing room without costing anything, if handled well.
The key is to ask proactively rather than waiting until you are already struggling. A supplier you have paid reliably is usually willing to extend terms for a good customer.
How to frame the conversation
Be direct and specific. Something like: "We have a timing issue in our cash cycle at the moment and I wanted to ask whether you would consider moving our terms to 45 days. We value the relationship and this would help us manage our payments more reliably." Suppliers respect directness. Vagueness creates more anxiety than a clear ask.
Prioritise asking suppliers you have a good payment history with - this is your leverage.
Offer something in return if you can - a longer contract commitment, consolidated orders, or early payment on other invoices.
Start with a modest ask. Moving from 30 to 45 days is easier to agree than 30 to 90 days.
Get any agreed change confirmed in writing - an email is sufficient.
Also review whether all your outgoings are timed sensibly. If several direct debits hit on the 1st of the month and your clients typically pay around the 15th, moving some payment dates can smooth the gap significantly - many suppliers will accommodate a simple date change.
Pricing and Deposits: Structural Changes That Prevent Cash Flow Problems
Once the immediate pressure is managed, it is worth making structural changes that reduce the risk of the same problem recurring. Two of the most effective are upfront deposits and staged payments.
A deposit - the amount varies widely by sector and project size, but upfront payments before work begins are common practice - does two things: it confirms the client's commitment, and it means you receive cash before you have incurred the full cost of delivery. For project-based businesses, this is one of the most powerful cash flow tools available.
Stage payments break larger projects into milestones, with a payment triggered at each. Instead of one invoice at completion, you might invoice 30% upfront, 40% at a defined midpoint, and 30% on delivery. This smooths your cash flow across the life of the project.
Pricing is a cash flow lever too
If your prices have not been reviewed in the past year, they may be contributing to cash flow pressure in a less obvious way. Underpriced work leaves less margin to absorb timing gaps. A modest price increase - where your market supports it - creates more buffer between your costs and your receipts, and can ease cash flow without any change to payment terms.
For service businesses with recurring clients, moving from project-by-project billing to a monthly retainer model is worth serious consideration. Retainers provide predictable monthly cash in, which makes planning and managing outgoings considerably easier.
VAT Cash Accounting: The HMRC Scheme That Helps Small Business Cash Flow
If your business is VAT-registered, there is an HMRC scheme that is specifically designed to help with the cash flow problem created by VAT - and many small businesses do not know it exists.
VAT cash accounting scheme
Under standard VAT accounting, you pay VAT to HMRC based on the date you invoiced the customer - not the date they paid you. This means you can end up paying VAT on money you have not yet received.
The VAT cash accounting scheme, available to businesses with VATable turnover of £1.35 million or less (and you must leave the scheme if turnover exceeds £1.6 million), lets you account for VAT based on when payment is actually received and made. You only pay HMRC the VAT when your customer pays you.
For any VAT-registered business with clients who regularly pay late, this scheme removes a significant cash flow risk. Without it, you could be paying VAT to HMRC on invoices that are 60 days overdue.
You can join the scheme at the start of a VAT period - there is no complex application process. Check HMRC's guidance or ask your accountant whether it is appropriate for your business. If you are under the threshold and have late-paying clients, it almost certainly is.
Building a Cash Reserve: The Long-Term Protection Every Small Business Needs
Every measure above improves your cash position - but they all still leave you exposed if a major client pays late or a large unexpected cost hits. The structural protection is a cash reserve: money set aside that you do not touch for operations.
Building a reserve while cash is tight feels counterintuitive. But the method is simple: treat a small percentage of every payment received as non-operational. Move it to a separate account the day it arrives. Even a modest buffer, built consistently, changes how the business feels to run.
Open a separate business savings account specifically for your reserve. Keep it out of your current account view.
Set a target - as a general rule of thumb, one to three months of fixed operating costs is often cited as a practical starting goal for an early-stage business, though the right level will depend on your revenue stability and sector.
Transfer a fixed percentage of every payment received - even if it is small to start. Consistency matters more than size.
Define the rules for when you can draw on it - for example, only when a specific account balance threshold is breached.
The Fair Payment Code is also worth knowing about if you work with larger businesses. Launched in December 2024 and administered by the Office of the Small Business Commissioner, it replaced the old Prompt Payment Code.
It uses a tiered Gold, Silver, and Bronze award structure, with the Gold tier requiring signatories to pay at least 95% of all invoices within 30 days. Checking whether your clients have signed up - and referencing it when discussing payment terms - gives you a concrete, non-confrontational basis for pushing for faster payment.
When to talk to an accountant
The steps in this guide address the most common causes of small business cash flow problems. If your cash flow difficulties are severe - you are missing payroll, you cannot meet HMRC obligations, or you are considering borrowing to cover operating costs - speak to your accountant or a business finance specialist before taking further action. This article is practical guidance, not financial advice.
Cash flow management is a discipline, not a crisis response. The businesses that handle it best are not necessarily the most profitable - they are the ones with systems: consistent invoicing, clear terms, structured follow-up, and a small reserve that buys them time when the timing does not work out. Start with the week-one actions and build from there.
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