How to Read a Cash Flow Statement

This guide is part of our [Financial Statements course](/learn/track/financial-statements).

The cash flow statement tracks the actual money moving in and out of a business over a period. It's the least glamorous of the three financial statements and, for many experienced investors, the most important — because profit is an opinion, but cash is a fact.

A company can report healthy profits on its income statement while quietly running out of money. The cash flow statement is where that shows up. This guide explains its three sections and the single number that matters most: free cash flow.

Why cash isn't the same as profit

Profit is measured on an accruals basis: a sale counts as revenue when it's made, not when the cash arrives. So a company can book a big profitable sale, record it as income, and still be waiting months to actually get paid. Depreciation, stock build-up, and generous customer credit all widen the gap between reported profit and real cash.

The classic warning sign: profits rising while operating cash flow falls. It often means earnings are being flattered by accounting rather than backed by money in the bank.

The three sections

The statement is split into three flows of cash.

Section	What it captures
Operating activities	Cash generated by the day-to-day business
Investing activities	Cash spent on (or raised from) long-term assets
Financing activities	Cash from debt, shares, and dividends

1. Operating cash flow

The most important section. It starts from profit and adjusts for non-cash items and changes in working capital to show the cash the core business actually produced. Healthy, growing operating cash flow that roughly tracks profit is the hallmark of a quality business.

2. Investing cash flow

This is where you find capital expenditure (capex) — money spent on property, equipment and other long-term assets — as well as acquisitions and disposals. Heavy capex isn't bad in itself; it depends on whether that spending earns a good return.

3. Financing cash flow

Cash raised by borrowing or issuing shares, and cash paid out as dividends, debt repayments or buybacks. Persistent reliance on new borrowing or share issuance to stay afloat is a red flag.

Free cash flow: the number that matters most

Take the cash from operations and subtract the capex needed to keep the business running, and you get free cash flow (FCF):

**Free cash flow = Operating cash flow − Capital expenditure**

This is the cash a company can actually use to pay dividends, buy back shares, reduce debt, or reinvest for growth — without borrowing. It's the foundation of serious valuation: our DCF calculator discounts a company's future free cash flows to estimate what the whole business is worth today.

A company that consistently converts profit into free cash flow is far healthier than one that reports profits it can never turn into spendable money.

What good and bad look like

Signs of strength:

Operating cash flow that matches or exceeds net profit, year after year
Consistently positive free cash flow
Dividends comfortably covered by free cash flow

Warning signs:

Profit rising while operating cash flow stalls or falls
Free cash flow that's persistently negative without a clear growth reason
Dividends funded by borrowing rather than cash generated

How the cash flow statement connects to the others

The cash flow statement reconciles the other two. It begins with profit from the income statement and ends by explaining the change in the cash balance you see on the balance sheet. Read as a set, the three statements reveal whether reported profits are real, durable and turning into cash.

Track free cash flow on Openbook

Openbook calculates operating cash flow, capex and free cash flow for every UK-listed company, and scores each on Cash Flow quality — so you can instantly see whether a company's profits are backed by real cash.

See the cash generation of Shell, National Grid, Reckitt or BAE Systems.

Start free with openbook (no card) →

Frequently asked

Common questions

What is a cash flow statement?

A cash flow statement tracks the actual cash moving into and out of a company over a period, split into operating, investing and financing activities. Unlike the income statement, which uses accounting profit, it shows the real money the business generated and spent.

What are the three sections of a cash flow statement?

Operating activities (cash from the day-to-day business), investing activities (cash spent on or raised from long-term assets like equipment), and financing activities (cash from debt, share issuance, dividends and buybacks).

What is free cash flow?

Free cash flow is operating cash flow minus capital expenditure. It's the cash a company can use to pay dividends, reduce debt, buy back shares or reinvest — without borrowing. It's widely regarded as the truest measure of financial health.

Why is cash flow more important than profit?

Profit is measured on an accruals basis and can be influenced by accounting choices, so a company can report profit it hasn't actually received in cash. Cash flow shows the real money generated, which is what ultimately pays dividends and keeps a business solvent.

How do I know if a company's profits are real?

Compare net profit to operating cash flow over several years. If cash flow consistently matches or exceeds profit, the earnings are well backed by cash. If profit keeps rising while cash flow lags, the profits may be lower quality. ---