For a lot of UK limited companies, the summer quarter looks deceptively quiet on the surface. Customers are on holiday, invoices drift, and directors assume the bank balance will hold. Then August arrives and it hasn't. This guide is for the director who wants to plan through Q3 — not react to it. If you want a wider look at the options available when cashflow tightens, our page on what we offer is a good starting point.
Why Q3 is the hardest quarter for cashflow
Several things collide between June and August:
- Late payment is worst in summer. Clients on holiday genuinely do delay approving invoices. 30-day terms drift to 45-60 days without a chase. If your revenue is B2B and your customers are small, this is a structural problem, not a one-off.
- Payroll doesn't pause. Your team takes their leave in July and August, but salaries still run on the last working day of each month. A company with six employees and a £30,000 monthly payroll cannot defer that to September.
- Corporation Tax falls in the summer for March year-ends. UK small companies pay Corporation Tax nine months and one day after the end of their accounting year. If your year ran April 2025 to March 2026, your CT bill was due on 1 January 2027 — but if you're on an older filing cycle, or if your year-end is September, the CT deadline lands squarely in summer.
- Q2 VAT hits in August. If you're on quarterly VAT and your stagger falls in the standard quarter (VAT return period ending 30 June), the bill is due by 7 August. For many companies that's within weeks of salaries going out.
Plan the Q3 cash map now
The most practical thing you can do in June is build a weekly cash flow projection through to the end of August. You don't need a spreadsheet model — a simple four-column table (week ending, cash in, cash out, balance) is enough to spot the pinch points before they arrive.
The inputs that matter most:
- Outstanding debtors and their realistic payment date (not the invoice terms, the date you actually expect the money).
- Confirmed orders or retainers that will generate cash in July and August.
- Fixed outgoings: rent, payroll, HMRC standing orders, loan repayments.
- Lumpy outgoings: the VAT bill, any equipment finance due, insurance renewal.
Any week where the balance dips to less than one week's fixed costs is a week you need to have a plan for. Not necessarily finance — it might be an early payment request to a client, or deferring a discretionary spend — but it needs a named plan, not hope.
What you can do before the pinch arrives
Invoice earlier. If you bill on project completion and your project finishes in late June, bill on the last day of June, not the first Monday back in July. Every week of slippage adds a week to payment.
Chase outstanding invoices now. The summer payment slow-down is predictable. If a client owes you money and your usual contact is going on leave in two weeks, phone them today, not in a fortnight. A polite "I wanted to make sure the invoice had arrived and check there are no queries" call is not aggressive — it is professional treasury management.
Check your HMRC liabilities. Log into your Business Tax Account and confirm what is due and when. HMRC also confirms arrangements for paying in instalments — the Business Payment Support Service (0300 200 3835) is the number. If you know a bill is coming and cashflow will be tight, call before the due date, not after. HMRC is significantly more helpful when approached early.
Talk to your director loan account. If you have money in the business you've drawn as a director loan, it might be worth a temporary reversal if the business needs it. Your accountant can confirm the most tax-efficient structure. This is not always an option but it is often overlooked.
When short-term finance makes sense
Short-term business lending has a specific, legitimate role in Q3 cashflow: bridging a gap you can see coming, where you know the gap closes from trading. The test is simple — if you will have the revenue to repay the loan within the loan term, it is a cashflow tool. If the underlying business isn't generating enough cash to repay it, it is not a solution, it's a deferral.
The situations where a short-term loan fits summer cashflow are:
- A confirmed order or project that will invoice in July or August, but you need cash now to fulfil it (materials, freelancers, equipment).
- A VAT bill due in August where you have the funds incoming but not yet landed.
- Payroll cover for one or two months where you know Q4 revenue will restore the position.
- A Corporation Tax bill where you have the cash in accounts receivable but not yet collected.
The situations where it doesn't fit: persistent cashflow deficit, where every month is tight and the loan just adds a repayment on top of an already-strained position. A short-term loan doesn't change the underlying economics of the business. If the problem is structural — costs too high, revenue too low, margins too thin — finance doesn't fix that. The right next step there is an accountant, not a lender.
A note on the cost
Short-term business lending costs more than a bank overdraft on a headline APR comparison. That's because the term is short and the APR calculation includes the fixed cost of underwriting spread over 30-90 days rather than 36 months. What matters is the total cost in pounds — not the APR — and whether that cost is justified by the value of solving the cashflow problem. Avoiding a late payment to HMRC, keeping a supplier relationship, or landing a new client through delivering on time can each be worth substantially more than the £ cost of the loan.
We show you the total cost in pounds before you commit. There are no hidden fees, and early repayment reduces the cost — you pay interest only for the days you hold the loan.
What to do this week
If your year-end is any month between October and March, your Q3 is the highest-risk quarter of your year. The practical checklist:
- Build the weekly cash map for July and August this week, not in July.
- Chase any invoice over 21 days old today.
- Confirm your VAT filing quarter and due date.
- Check your Business Tax Account for any CT or PAYE liabilities due before September.
- If you see a gap in the cash map, name a plan for it — whether that's a client call, a HMRC conversation, or a lending application.
The companies that manage summer cashflow best are the ones who look at it in June. The ones who look at it in August are usually in a harder position.
If you'd like to explore whether a short-term loan could help bridge a specific gap, the eligibility check gives you a quick, no-commitment answer about what your company might qualify for.