Cash flow is the amount of funds moving into and out of your business during a specific period. It measures financial health and actual money available to meet financial obligations, invest in opportunities, and sustain business operations.
As a simplified equation it looks as follows: Net cash flow = Total cash inflows — Total cash outflows
Cash flow hereby tracks all “real-money” movements: customer payments hitting your bank account, supplier invoices you actually pay, wages transferred to employees, and loan repayments debited from your account, etc. but disregards non-cash accounting transactions such as depreciation. When more money comes in than goes out, your firm has a positive cash flow. If outflows exceed inflows, cash flow turns negative and your business faces a cash drain.
Cash flow and profit measure fundamentally different things:
As a hypothetical example, think of a software company that invoices £140,000 for an annual software licence in January on a 60-day payment term. Under accrual accounting rules, revenue may show £140,000 recognised in January or may be spread over 12 months and the company’s profit looks healthy immediately.
In cash terms, however, the business received zero in January. To run, it will still need to pay salaries, rent, cloud compute etc. — the cash flow for January is negative.
Management accounts show a healthy profit while the bank balance has shrunk. Such a timing mismatch can create the illusion of profitability while cash flow is actually negative and the business will need to finance outlays through other means until the revenue is actually earned and paid.
Accounting profit also deducts depreciation, a non-cash charge that is applied to spread costs of assets over their useful lives. A profit and loss statement may show £125,000 profit after £20,000 depreciation, but that £20,000 never left the bank account this period. The cash-flow is actually higher by the “fictional” £20,000 in deducted depreciation.
The lesson? Profit pays the bills on paper. Cash pays them in reality.
Under IFRS (IAS 7) (applicable for example to UK and European listed companies) and UK GAAP (FRS 102), the statement of cash flows breaks money movements into three distinct categories.
Operating cash flow tracks cash from core business activities such as selling products or services, paying suppliers, covering wages, settling tax etc. This is the most important category because it shows whether the fundamental business model generates cash or consumes it.
A standard way of calculating operating cash-flow starters from net profit and then adding back non-cash items and working capital changes:
Want to learn more about direct and indirect cash flow methods?
Investing cash flow captures movements related to long-term fixed assets such as buying property, equipment, or technology as well as acquiring businesses or selling assets.
Investment activities typically show negative cash flow in growing businesses. That's not necessarily bad, since it shows strategic investment drives future growth.
The simplified calculation is more straightforward than for CFO:
Financing cash flow reflects movements between business and capital providers like shareholders and lenders. It reflects the sources of funds needed to run the business and includes activities such as raising new loans, repaying debt, issuing shares, paying dividends, or buying back shares.
The financing cash flow reveals a firm's capital strategy. A startup might show large inflows from venture funding. A mature business might show negative flows as it pays down debt and returns cash to shareholders.
The calculation includes:
Net cash flow is the overall number on a cash flow statement. It sums up CFO, CFI and CFF and shows whether the business ended the period with more or less cash than it started with.
The calculation is straightforward: Net cash flow = Operating cash flow + Investing cash flow + Financing cash flow
In our example, the business generated £78,000 from operations, spent £67,000 on long-term assets, and raised a net £50,000 from financing activities, thereby producing a net cash flow of £61,000. That means £61,000 more cash in the bank at the end of the period than the beginning.
A positive net cash flow doesn't always mean the business is healthy, however. Context matters. A business showing negative net cash flow because it invested heavily in new equipment may be in a far stronger position than one showing positive net cash flow only because it took on a large loan.
Another type of cash flow that is important because it strips away financing decisions is Free Cash Flow (FCF). It isolates a critical question: after keeping the business running and investing in necessary assets, how much cash is actually left over?
The formula is: Free cash flow = Operating cash flow − Capital expenditures
In our example, operating cash flow of £78,000 minus £67,000 in capital expenditures leaves just £11,000 in free cash flow. That's a tight margin. The business is generating cash from operations, but nearly all of it is being reinvested in assets.
This isn't necessarily a concern. A business in a growth phase will often show low or even negative free cash flow as it invests aggressively. The key is whether those investments translate into stronger operating cash flow in future periods. However, consistently low free cash flow in a mature business can signal that earnings quality is poor. Profits may appear on paper, but cash isn't making it to the bank.
For CFOs, it is important to have a real-time up to date picture of cash flow. Traditional approaches provide visibility hours or days after transactions settle. Modern treasury platforms connect directly to banks via APIs, providing real-time balance updates across all accounts, entities, and currencies.
This enables intraday liquidity management, immediate identification of unexpected movements, and dynamic positioning to minimise idle balances.
Understanding cash flow is the first step. Managing it effectively requires the right tools and technology. Embat's treasury automation platform brings together real-time cash visibility, cash forecasting, automated reconciliation, and centralised payment management in one connected system.
Whether you're struggling with cash visibility, drowning in manual work, or need better forecasting to support strategic decisions, Embat helps. Book a demo to see how Embat can strengthen your cash flow management and free your finance team to focus on value-added analysis and strategy.
Profit is an accounting measure that includes non-cash items like depreciation. Cash flow on the other hand tracks actual money going in and out of a firm's business.
Yes, however usually not for ever or a long period of time. Short-term negative cash flow is manageable with access to financing such as loans or equity. Startups, for example, often run negative cash flow intentionally while building market position, funded by investors. However, persistent negative cash flow eventually exhausts financing resources, regardless of accounting profit.
Free cash flow is operating cash flow minus capital expenditures required to maintain and grow the business. It represents cash available for discretionary purposes such as debt reduction, dividends, or acquisitions. Investors focus on free cash flow because it shows true financial flexibility.
Focus on key areas to speed up cash collection and reduce outlays: accelerate receivables through tighter terms and prompt follow-up; manage payables strategically; optimise inventory with better demand forecasting; control capital spending carefully; and improve forecasting with technology for real-time visibility.
Most UK and EU businesses above small-entity thresholds must prepare a statement of cash flows as part of annual accounts under IFRS and UK GAAP. Small entities qualifying under FRS 102 are typically exempt. Even if exempt, preparing cash flow statements internally is a best practice.
