Cash flow management: a practical routine for limited companies
October 23, 2026
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Cash flow management means knowing when money will come into and leave your business, and acting early so you can pay staff, suppliers, and HMRC on time. For a UK limited company, it comes down to a short routine: a rolling forecast, firm payment terms, planned tax payments, and a cash buffer.
Only 26% of small business owners forecast their cash flow monthly, according to iwoca's survey of 1,005 owners (April 2026). A forecast you update often is how you see a tight week coming, and iwoca's free Cash Flow Resilience Benchmark shows how your position compares with similar UK small businesses.
What cash flow management means for a limited company
Cash flow management helps you see whether your company will have enough cash to pay its bills. You track when you expect customer payments and when wages, supplier bills and tax payments are due.
Reviewing those timings week by week can help you spot a gap earlier and plan how to respond. It won’t prevent every shortfall, but it gives you a clearer view of what’s ahead.
If you’re already struggling to cover payments, our guide to identifying and addressing cash flow problems explains where to start.
Profit doesn't guarantee cash in the bank
Your company can make a profit and still struggle to pay its bills. Your accounts may include sales that customers haven’t paid for yet. If a supplier bill falls due before that money arrives, you could face a cash gap.
That’s why your profit and loss account and bank balance can tell different stories. To plan ahead, look at the cash you have now, when you expect payments and when your bills are due.
A cash flow routine in seven steps
Most of the work fits into seven habits: keep a rolling forecast, agree payment terms and chase on a schedule, match supplier terms to when you get paid, plan tax payments, hold a buffer, line up funding options, and review on a fixed rhythm.
Keep a rolling 13-week cash flow forecast
A 13-week cash flow forecast lists the cash you expect in and out each week for the next quarter, so a tight week shows up while there's still time to act. Each week, you add a new week at the end and replace last week's estimates with what actually happened.
To build one:
- List your opening bank balance and every payment you know is coming: wages, rent, suppliers, loan repayments, and tax.
- Add the cash you expect from customers in the week you expect them to pay, not the week you invoice.
- Work out each week's closing balance and mark the lowest balance you're comfortable with, your floor.
- Each week, compare the forecast with your bank account and update the next 13 weeks.
A spreadsheet works, or you can start from a cash flow forecast template. One in five owners in iwoca's survey forecast annually or never. 'Forecasting regularly can help you spot pressure points early and feel much more confident in your financial decisions,' says Seema Desai, COO at iwoca.
Worked example: a 13-week forecast
In this illustrative forecast, a company starting with £30,000 sees its balance fall to £18,000 in week 8, below the £20,000 floor its owner set, because a VAT payment and two payroll runs land within three weeks of each other. The figures are made up to show the method.
Every week the company pays £4,000 of running costs. Rent of £3,000 goes out in weeks 1, 5, and 9, payroll and PAYE of £14,000 in weeks 4, 8, and 13, and a £12,000 VAT bill in week 6.
| Week | Cash in | Cash out | What's going out | Closing balance |
|---|---|---|---|---|
| 1 | £8,000 | £7,000 | Running costs, rent | £31,000 |
| 2 | £9,000 | £4,000 | Running costs | £36,000 |
| 3 | £7,000 | £4,000 | Running costs | £39,000 |
| 4 | £10,000 | £18,000 | Running costs, payroll | £31,000 |
| 5 | £8,000 | £7,000 | Running costs, rent | £32,000 |
| 6 | £9,000 | £16,000 | Running costs, VAT | £25,000 |
| 7 | £4,000 | £4,000 | Running costs | £25,000 |
| 8 | £11,000 | £18,000 | Running costs, payroll | £18,000 |
| 9 | £9,000 | £7,000 | Running costs, rent | £20,000 |
| 10 | £8,000 | £4,000 | Running costs | £24,000 |
| 11 | £10,000 | £4,000 | Running costs | £30,000 |
| 12 | £9,000 | £4,000 | Running costs | £35,000 |
| 13 | £9,000 | £18,000 | Running costs, payroll | £26,000 |
Closing bank balance by week, £ thousands
- W1
- W2
- W3
- W4
- W5
- W6
- W7
- W8
- W9
- W10
- W11
- W12
- W13
Your £20,000 floor
- Week 6: £12,000 of VAT goes out. Week 8: payroll takes the balance to £18,000, below the floor.
- An illustrative limited company.
Sources: the worked example in this article.
The forecast shows the dip six weeks ahead, which gives the owner options. They could chase the invoices due in week 7, ask a supplier to move a payment by a fortnight, or hold back a planned purchase until week 11, when the balance recovers.
Agree payment terms and follow up consistently
Agree payment terms in writing and make the due date clear on your invoice. Send the invoice promptly, then follow up if payment hasn’t arrived.
Your follow-up schedule could include:
- Before the due date: check that the customer has received the invoice and has everything needed to pay.
- On the due date: check whether payment has arrived and follow up if it hasn’t.
- If payment is overdue: ask whether there’s a query and confirm when you can expect payment.
Keep a record of your conversations and any revised payment date.
Gov.uk's late-payment guidance here.
Ask suppliers about terms that fit your cash flow
If you need to pay a supplier before your customer pays you, your company has to cover the gap. For example, a supplier bill due in seven days may fall well before a customer payment expected in 30 days.
Ask whether your supplier can agree a payment date that better fits your expected income. Confirm any change in writing rather than assuming you can pay later.
Keep the agreed date in your cash flow forecast and allow for customers paying late. Better-aligned terms can help reduce the gap, but they won’t remove every shortfall.
This keeps the practical benefit without promising that suppliers will extend terms or customers will pay as expected. It also avoids repeating legal detail that belongs in one checked explanation elsewhere.
Plan ahead for VAT, PAYE and Corporation Tax
Put your company’s expected tax payments into your cash flow forecast, alongside wages and supplier bills. Check the amounts and payment dates with your accountant so you can see what cash you’ll need and when.
If you use a separate account to set money aside, base the amount on an estimate of what your company will owe – not an assumed share of every receipt.
The dates below are the usual ones for a small limited company, from gov.uk:
| Tax | When it's usually due | How to plan for it |
|---|---|---|
| VAT | Returns usually every three months; the online deadline is usually one calendar month and seven days after the period ends | Move the VAT part of each receipt into a separate account |
| PAYE and National Insurance | By the 22nd of the next tax month if you pay monthly | Treat it as part of each payroll run in the forecast |
| Corporation Tax | Nine months and one day after your accounting period ends, for taxable profits up to £1.5 million | Estimate it from your management accounts and save towards it monthly |
Build a cash buffer you can draw on
A cash buffer is money you keep aside for slow months and unexpected costs, usually measured in months of essential costs. There's no single right size, because it depends on how uneven your income is.
iwoca's research found that 28% of small businesses have two months or less of cash in reserve. Desai's view is that a reserve should ideally cover 'several months of essential costs': 'That reserve creates vital breathing space if revenues fall or unexpected costs arise.'
To size and build yours:
- Add up one month of essential costs from your forecast: wages, rent, loan repayments, and key suppliers.
- Decide how many months you'd want to cover, given how much your income moves from month to month.
- Build it with a fixed transfer each week or month into a separate account.
Line up funding options before you need them
Researching funding while trading is steady gives you time to compare options, because arranging finance can take weeks. In iwoca's survey, 38% of owners said they'd need more than 30 days to secure extra funding, and 11% weren't sure how to access it at all.
'Line up your options while things are stable, so you're able to make faster and more informed decisions when you need to access finance,' says Desai. A forecast also shows what kind of gap you're dealing with: a short one with a clear end, such as stock before a busy season, or a longer one where costs run ahead of income every month. Borrowing can bridge the first kind, but it doesn't fix the second, where the steps for fixing cash flow problems come first.
Review on a weekly, monthly, and quarterly rhythm
A short weekly check of your bank balance against the forecast, a monthly look at who owes you money, and a quarterly review of your terms and buffer cover most of what a small company needs.
| When | What to check |
|---|---|
| Weekly | Bank balance against the forecast; roll the forecast on by a week; chase anything overdue |
| Monthly | Who owes you money and for how long; tax set aside; the transfer into your buffer |
| Quarterly | Customer and supplier terms; the size of your buffer; how close the forecast came to what happened |
What lenders look for in your cash flow
Many lenders judge a small company's cash flow from its recent bank transactions as much as from its filed accounts. iwoca asks for recent bank statements, or a connection to your bank, for most loans, and the amount it can offer depends on your turnover, trading history, and performance.
A steady routine tends to show in that data: regular customer payments, tax paid on time, and fewer weeks where the balance runs very low. Before you apply, iwoca Credit Compass, a free tool, shows your Equifax business credit score, four more scores, and the key factors affecting them.
For a short gap your forecast has shown, an iwoca Flexi-Loan is a business loan with flexible repayment options for UK limited companies. You can borrow from £1,000 to £1m and repay early with no fee. Every Flexi-Loan needs a personal guarantee from at least one director.
The numbers worth watching
A few cash numbers tell you more than a long list of ratios: your closing balance against your floor, how long customers take to pay, how long cash is tied up in your working capital cycle, and operating and free cash flow over the year.
Each one answers a different question, so the table says what it tells you and how often to look:
| Number | What it tells you | How often |
|---|---|---|
| Closing balance against your floor | Whether a tight week is coming | Weekly |
| Days customers take to pay | Whether your chasing is working | Monthly |
| Cash conversion cycle | How many days cash is tied up between paying suppliers and being paid, the core of your working capital cycle | Quarterly |
| Operating cash flow | Whether day-to-day trading brings in more cash than it uses | Quarterly or yearly |
| Free cash flow | What's left after investing in equipment and other long-term assets | Yearly |
The cash conversion cycle is days stock is held, plus days customers take to pay, minus days you take to pay suppliers. A shorter cycle means less cash tied up in running the business.
Tools that help you manage cash flow
A spreadsheet is enough to start a forecast, and accounting software with bank feeds saves time keeping it up to date. An accountant or bookkeeper can build and review the forecast with you if you'd rather not do it alone.
The main options are:
- A spreadsheet, which is free and flexible but has to be updated by hand
- Accounting software with bank feeds, such as QuickBooks, Sage, or Xero, which pulls in transactions automatically
- Forecasting add-ons that connect to your accounting software and roll the forecast forward
- An accountant, bookkeeper, or part-time finance director, who can run the routine with you
Cash flow management questions
What are the three main types of cash flow?
Cash flow is usually split into three types on a cash flow statement: operating cash flow from trading, investing cash flow from buying or selling long-term assets, and financing cash flow from loans, repayments, share capital, and dividends.
How do you manage cash flow in a fast-growing business?
A fast-growing business often uses cash before it brings any in, because staff, stock, and materials are paid for before customers pay. Forecasting each large new contract or order separately shows how much cash it ties up and for how long, so you can agree deposits or staged payments where you need them.
How do you manage seasonal cash flow?
Seasonal businesses usually plan the whole year ahead: building cash in the busy months, timing stock and staff costs, and arranging any borrowing before the quiet months start.
Chris Billingham, founder of Muscle Squad, an online fitness equipment business, borrows and repays in step with his sales cycle: 'We go through waves of borrowing a significant amount and paying back a significant amount. You need the conviction that a good period is only around the corner.'
About iwoca
iwoca is one of Europe's leading non-bank lenders. Since 2012, we've lent over £4.5 billion to 100,000 small and medium-sized businesses in the UK and Germany.
iwoca has won a number of awards, including Moneynet's best small business lender (2024) and best small business provider (2025). We've also been featured in major media outlets including The Independent, Forbes and the Financial Times.
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