For any small business owner, understanding cash flow is essential. You can be profitable on paper and still run into financial difficulties if there isn’t enough cash coming into your business when you need it. That’s why understanding net cash flow and how it affects your business is so important.
In this guide, we’ll explain net cash flow in simple terms, show you how to calculate it, and explore how cash flow funding can help when cash is tight.
What Is Net Cash Flow?
Net cash flow is the difference between the cash coming into your business and the cash going out over a specific period.
In simple terms:
- Money coming in = cash inflows
- Money going out = cash outflows
- Net cash flow = inflows minus outflows
If more cash comes in than goes out, you have positive net cash flow.
If more cash goes out than comes in, you have negative net cash flow.
Unlike profit, which is based on accounting figures, net cash flow looks at the actual cash available in your business.
Example
Imagine your business receives:
- £20,000 from customer payments
- £2,000 from other income
Total cash inflows: £22,000
During the same month, you pay:
- £10,000 in wages
- £4,000 in supplier costs
- £3,000 in rent and utilities
Total cash outflows: £17,000
Net cash flow = £22,000 – £17,000
Net cash flow = £5,000
This means your business generated an additional £5,000 in cash during that period.
Why Is Net Cash Flow Important?
Knowing your net cash flow helps you understand the financial health of your business.
Strong positive cash flow can help you:
- Pay suppliers on time
- Cover wages and overheads
- Invest in growth opportunities
- Build a financial safety buffer
- Improve business stability
Negative cash flow, even temporarily, can make it difficult to meet everyday expenses.
This is particularly common for businesses that offer payment terms to customers. You may complete work today but wait 30, 60 or even 90 days before receiving payment.
How Do You Calculate Net Cash Flow?
The formula is straightforward:
Net Cash Flow = Total Cash Inflows – Total Cash Outflows
Step 1: Calculate Total Cash Inflows
Cash inflows can include:
- Customer payments
- Sales revenue received
- Loan proceeds
- Investment funds
- Tax refunds
- Asset sales
Step 2: Calculate Total Cash Outflows
Cash outflows can include:
- Supplier payments
- Staff wages
- Rent and utilities
- Loan repayments
- Tax payments
- Equipment purchases
- Operating expenses
Step 3: Subtract Outflows From Inflows
Once you’ve totalled both figures, subtract your outflows from your inflows.
A positive result means cash is increasing.
A negative result means cash is decreasing.
Net Cash Flow vs Profit: What's the Difference?
For example:
- You issue £50,000 of invoices during the month.
- Customers have 60-day payment terms.
- You still need to pay wages, suppliers and rent immediately.
On paper, your business may be profitable. However, if customers haven’t paid yet, cash can still be tight.
This is why monitoring net cash flow is just as important as reviewing profit and loss reports.
Common Causes of Negative Net Cash Flow
Negative cash flow isn’t always a sign that a business is failing. It can happen for several reasons:
Late Customer Payments
One of the biggest challenges for small businesses is waiting for customers to settle invoices.
Seasonal Trading
Many businesses experience fluctuations throughout the year, creating periods where expenses exceed income.
Rapid Growth
Growth often requires additional staff, stock or equipment before new revenue starts coming in.
Unexpected Costs
Equipment failures, repairs or sudden increases in operating costs can quickly impact cash flow.
How Cash Flow Funding Can Help
A common form of cash flow funding is invoice finance
With invoice finance, a lender advances a percentage of your outstanding invoice value, often within 24 to 48 hours. Instead of waiting weeks or months for payment, you can access cash tied up in unpaid invoices immediately.
Businesses often use cash flow funding to:
- Pay suppliers on time
- Meet payroll obligations
- Take on larger contracts
- Manage seasonal fluctuations
- Invest in growth opportunities
For many SMEs, cash flow funding helps turn unpaid invoices into working capital, improving net cash flow and reducing financial pressure.
Tips for Improving Net Cash Flow
- Issue your terms and conditions prior to working with new clients
- Invoice customers promptly
- Follow up overdue payments quickly
- Negotiate favourable supplier terms
- Monitor cash flow forecasts regularly
- Reduce unnecessary expenses
- Build a cash reserve where possible
- Consider cash flow funding solutions when needed
Understanding and tracking net cash flow allows you to make better financial decisions, avoid unexpected cash shortages and plan for future growth. While positive cash flow is the goal, many businesses experience temporary cash flow challenges due to late payments or seasonal fluctuations.
When that happens, cash flow funding solutions such as invoice finance can provide fast access to working capital, helping your business stay on track and continue growing with confidence.
To find out more about how we can help, get in touch today or book your free consultation.