What is a working capital cycle?

You’ve made the sale, the profit looks great on paper, and the team is busy. But as you look at your bank account, you’re left wondering: where’s the cash? If your money feels stuck in the gap between buying materials and finally getting paid by your customers, you’re experiencing the reality of your working capital cycle.

The working capital cycle measures the time it takes to turn the money you’ve invested back into actual, spendable cash in your bank. With the cost of doing business remaining high and interest rates still a significant factor, a slow cycle can be an expensive drain on your growth.

In this article, we’ll explain what the working capital cycle is, how it works, how to calculate it, how to improve it, and more.

What is the working capital cycle?

The working capital cycle (also called ‘working capital period’ or ‘cash conversion cycle’) measures how long it takes for your business to turn the money you spend on inventory and operations back into cash in the bank – if you’re new to the concept of working capital, you might find it helpful to first read: “What is working capital and how do you calculate it?”.

In simple terms, it’s the time between paying for the goods or services you sell and getting paid by your customers.

For example, imagine you run a clothing store. You buy stock from suppliers, which sits on your shelves or in your warehouse until it’s sold. Meanwhile, you still need to pay your suppliers, rent, and staff. The working capital cycle tracks how long your money is tied up in that process.

The working capital cycle is an important metric because it shows how efficiently your business turns its day‑to‑day operations into cash, affects your ability to cover costs, invest in growth, and handle unexpected expenses.

How does the working capital cycle work?

The working capital cycle is made up of three simple stages:

1. Buy or create inventory using cash or supplier credit

2. Sell that inventory and create receivables if customers pay later

3. Collect cash from customers and use some of it to pay suppliers

Each stage is measured in days, showing how long your money is tied up before it returns to you:

• Days inventory outstanding (DIO) measures how long your stock sits before it’s sold

• Days sales outstanding (DSO) measures how long customers take to pay you after a sale

• Days payables outstanding (DPO) measures how long you take to pay your suppliers

How do you calculate your working capital cycle?

Once you know your DIO, DSO, and DPO, you can calculate your working capital cycle to see how efficiently your business turns operations into cash.

To do this, you’ll need to know your Cost of Goods Sold (COGS), also referred to as cost of sales, which is the total cost of producing the goods your business sells in a year.

What is the working capital cycle formula?

To work out how many days, on average, your cash is tied up between buying stock and getting paid by customers, you can use the following working capital cycle equation:

Here’s what each part means:

• DIO + DSO = The total time your money is “out of pocket” from buying inventory to collecting payment

• Subtract DPO = The extra time you gain by delaying payments to suppliers

The higher the result, the longer your cash is tied up in operations and the more you may need to rely on savings or short-term finance to cover the gap. A lower (or even negative) number means your business is converting sales into cash more quickly.

Working capital cycle calculation example

Let’s say you run a small manufacturing business. Here’s how you’d put the formula of the working capital cycle to use:

1. Calculate DIO: Your average inventory is £30,000 and your annual Cost of Goods Sold (COGS) is £120,000

   1. DIO = (30,000 / 120,000) x 365 = 91 days

2. Calculate DSO: Your accounts receivable is £15,000, and your annual credit sales are £180,000

   1. DSO = (15,000 / 180,000) x 365 = 30 days

3. Calculate DPO: Your accounts payable is £25,000, and your COGS is £120,000

   1. DPO = (25,000 / 120,000) x 365 = 76 days

4. Put it all together: Your working capital cycle is 46 days

   1. Working capital cycle = 91 + 30 - 76 = 46 days

What this means in practice is that your cash is tied up for 46 days between buying materials and getting paid by customers. To cover that gap, you’ll need either cash in the bank or access to short-term finance, like an overdraft or invoice finance.

What is a good working capital cycle period?

There’s no single ‘ideal’ number, but a shorter cycle is usually better. It means you’re getting your cash back faster, reducing your need for borrowing, and improving your financial flexibility.

What are the benefits of a shorter working capital cycle?

• More cash on hand: Less money tied up in stock or unpaid invoices means you’re better placed to cover costs and seize opportunities

• Lower borrowing costs: You’ll be less reliant on credit cards, business loans, and working capital loans, saving you money on interest and fees

• Faster growth: Cash that isn’t stuck in the cycle can be used for growing and expanding your business

• Stronger supplier relationships: Paying suppliers on time (or even early) could earn you discounts and better payment terms

• Better resilience: A short cycle acts as a buffer if sales drop or costs rise, helping you weather tougher periods

What are the downsides of a long working capital cycle?

• Cash flow problems: Even if your business is profitable, too much cash tied up in inventory or unpaid invoices could leave you struggling to pay bills

• Higher financing costs: You might need to rely on overdrafts or loans to plug the gap, which adds interest and fees

• Missed opportunities: Cash stuck in the cycle isn’t available for growth, bulk discounts, or emergencies

• Strained relationships: Late payments can frustrate suppliers, while slow-moving stock risks going out of date or becoming unsellable

• Less flexibility: If a customer pays late or costs suddenly rise, a long cycle gives you less room to manoeuvre

How to improve the working capital cycle

If your working capital cycle is longer than you’d like, you could take the following steps to shorten it.

1. Reduce the number of days inventory is outstanding (DIO)

The longer stock sits on your shelves or in your warehouse, the longer your cash is tied up. To reduce your DIO, try these steps:

• Order only what you need, just in time: Instead of holding lots of stock, order inventory closer to when you’ll actually use or sell it. This should help avoid overstocking and reduce storage costs.

• Use data to predict demand: Look at your sales history to forecast what you’ll need and when. This should help you avoid buying too much stock that might not sell quickly.

• Move slow-selling stock faster: If some items aren’t flying off the shelves, consider running a promotion, bundling them with popular products, or discounting them to turn them into cash.

2. Get paid by customers more quickly (DSO)

Waiting for customers to pay could leave you short on cash. So to shorten the number of days sales are outstanding (DSO), focus on making it easier and more appealing for customers to pay you promptly.

• Set shorter payment terms: Instead of giving customers 30 days to pay, try reducing it to 15 days. Make sure your payment terms are clear on every invoice to avoid any delays.

• Send invoices immediately: The sooner you create an invoice, the sooner you should get paid. Instead of waiting until the end of the month, send invoices as soon as the work’s done or the product’s delivered.

• Reward early payments: To incentivise faster payments, you could offer a small discount if customers pay within 10 days, for example.

• Automate payment reminders: Use accounting software to send automatic reminders when invoices are due or overdue. As well as saving you time, it should help keep payments on track. To learn more, read our guide on how to chase an overdue invoice.

3. Pay suppliers wisely (DPO)

While it’s important to pay suppliers on time, you don’t want to pay too early. Managing the number of days your payables are outstanding (DPO) is about balancing good relationships with smart cash flow.

• Negotiate longer payment terms: Ask suppliers if you can extend your payment window – from 30 days to 45 or 60, for example. Suppliers are more likely to agree if you’re a reliable customer.

• Take advantage of early-payment discounts, if it makes sense: If a supplier offers a discount for paying early, calculate whether the savings outweigh the cost of using your cash sooner. Sometimes, it can be worth it.

• Don’t pay before you need to: Schedule payments to go out on the due date, not before. This will keep cash in your bank account for as long as possible, giving you more financial flexibility.

Bridge the gap with working capital finance

If your working capital cycle is tying up too much cash, or you simply need a quick injection to cover the gap between paying suppliers and getting paid by customers, working capital finance could be the answer. These options are designed to free up cash fast, so you can keep your business running smoothly without the stress of late payments or missed opportunities.

• Working capital loans: Borrow £1,000 to £20 million over 3-24 months at 7-20% APR, with decisions often made within 1-3 days. This can be a practical option for covering unexpected costs or bridging short-term cash flow gaps.

• Invoice finance: Unlock up to 95% of your outstanding invoices within 24-48 hours, paying a 1-3% fee plus interest. Because you're borrowing against money already owed to you, it can be an effective way to ease cash flow pressure quickly.

• Merchant cash advance (MCA): Access £5,000 to £1 million upfront, repaid as a percentage of daily card takings. It’s quick to arrange, but factor rates (a fixed multiplier applied to the amount borrowed) of 1.1-1.5 can equate to 30-100%+ APR, so it typically suits businesses with steady card revenue, such as retailers, cafes, or salons.

• Asset based loans: Borrow against existing assets (eg stock, equipment, property, or intellectual property) to unlock liquidity without taking on unsecured debt.

• Business credit cards or overdrafts: Useful for smaller, one-off costs such as emergency repairs or restocking. But interest rates can be high, so aim to clear the balance quickly.

Wrapping up

The working capital cycle shows how efficiently your business turns operations into cash. Understanding how it works, how to calculate your business’s cycle, and how to improve it could help you free up cash, reduce borrowing costs, and build a more resilient business.

Here’s a reminder of the key points:

• The working capital cycle measures the time it takes to turn inventory and sales into cash, minus supplier payment delays

• A shorter cycle improves cash flow, reduces reliance on debt, and gives you more financial flexibility

• Calculate your cycle using the formula: Days inventory outstanding (DIO) + Days sales outstanding (DSO) - Days payables outstanding (DPO)

• A good cycle is short enough to keep cash moving but realistic for your industry and business model

• Improve your cycle by collecting customer payments faster, managing inventory more efficiently, and optimising supplier payment terms

Working capital cycle FAQs

Why does the working capital cycle matter for small businesses?

The working capital cycle tells you how quickly your business turns its everyday operations into actual cash in the bank. For small businesses, where every pound counts, a shorter cycle means you’re not waiting as long for your money. That translates to less need for loans or overdrafts, more cash on hand to invest in growth, and a better ability to handle surprises.

How often should I review my working capital cycle?

It’s a good idea to check your working capital cycle at least every three months. Though if your business is seasonal or cash flow is often tight, checking it monthly is even better. Keeping an eye on it helps you catch issues early (like customers taking longer to pay or stock piling up) so you can fix them before they impact your finances.

How does seasonality impact the working capital cycle?

If your business has busy and quiet seasons, your working capital cycle will naturally stretch and shrink. During slow periods, you might end up with more stock sitting unsold or customers taking longer to pay, which ties up your cash. During busy seasons, the cycle shortens as sales pick up and cash flows in faster. The important thing is to prepare effectively, such as saving extra cash during busy times or arranging flexible finance (like an overdraft) to cover quieter months.

How does the working capital cycle differ between industries?

Some industries move faster than others. For example, businesses like retail or dining, where stock sells quickly and customers pay upfront, usually have short cycles. But if you’re in manufacturing, construction, or any project-based field, your cycle will likely be longer due to things like bulk orders, long production times, or extended payment terms.

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