Free cash flow versus profit: why cash tells a clearer story

Net income is shaped by accounting rules and estimates. Cash is harder to dress up. That is why many investors pay close attention to free cash flow, the money a business actually has left over after paying to run and maintain itself. This article explains what free cash flow is, why it can differ from profit, how to use it for valuation, and what to watch out for.

The cash flow statement

Alongside the income statement and balance sheet, companies publish a cash flow statement. It has three parts:

• Operating activities: cash generated by the core business.
• Investing activities: cash spent on or received from long-term investments, such as equipment and acquisitions.
• Financing activities: cash from or paid to lenders and shareholders, such as borrowing, repaying debt, dividends and buybacks.

What free cash flow is

Free cash flow (FCF) is operating cash flow minus capital expenditure, which is the money spent on equipment, buildings and other long-term assets that keep the business running and growing. What remains is the cash available to pay dividends, buy back shares, repay debt, make acquisitions or build up reserves.

A worked example. A company reports operating cash flow of 180 and capital expenditure of 70, so free cash flow is 110. Its net income is 100, so FCF is 1.1 times net income, which suggests that profit is well supported by cash.

Why profit and cash can differ

• Growth ties up cash. A fast-growing company may record profit while cash is tied up in unsold inventory or unpaid customer bills.
• Heavy capital spending. A company may look profitable but spend most of its cash on new factories. Another company with the same profit but light capital needs generates far more free cash.
• Non-cash items. Depreciation reduces profit but not cash. Stock-based compensation is a cost but not a cash outflow.
• Timing. Receiving payment in advance boosts cash, while paying suppliers early reduces it.
• Accounting choices. Rules for recognising revenue and capitalising costs affect profit more than they affect cash.

Take a contrasting example. A second company reports net income of 100, but operating cash flow is only 40 because customers are slow to pay, and it spends 60 on equipment. Its free cash flow is negative 20, despite the healthy profit. That is a signal to dig into why.

Useful measures

• FCF margin: free cash flow divided by revenue. It shows how much of each unit of sales turns into free cash.
• FCF conversion: free cash flow divided by net income. A figure consistently near or above 1 suggests high-quality earnings. A figure well below 1 raises questions.
• FCF yield: free cash flow divided by market value. If the company in the first example has a market value of 2,200, its FCF yield is 110 divided by 2,200, or 5%. It is similar to the earnings yield but based on cash, and gives another way to judge valuation.
• FCF per share, which accounts for the number of shares.

How to use it

1. Look at several years. One year can be distorted by a big capital project or a swing in working capital. A trend of growing free cash flow is a good sign.
2. Compare with net income. If free cash flow consistently trails profit, understand why.
3. Separate maintenance from growth spending. Some capital expenditure keeps the existing business going, and some expands it. Free cash flow before growth investment can show the underlying cash power of a mature business, but be careful, since the split is an estimate.
4. Check what the cash is used for. Dividends, buybacks and debt repayment are different choices with different implications.
5. Compare with peers in the same industry, because capital needs differ widely.

Things to watch out for

• One-off boosts. A temporary release of working capital, such as delaying payments to suppliers, can inflate free cash flow for a year.
• Costs pushed out of capital expenditure. Leasing or capitalising software development can make free cash flow look better than it is.
• Stock-based compensation. Free cash flow often excludes the cost, which is paid in shares. Large awards dilute existing shareholders.
• Growth companies. Some strong businesses deliberately reinvest everything and show low or negative free cash flow. That can be sensible if the investments earn high returns, but you need to judge whether they do.

Common mistakes

• Looking only at net income.
• Taking one year of free cash flow as typical.
• Ignoring share-based pay.
• Assuming negative free cash flow is always bad, or positive always good.
• Forgetting debt: strong cash flow with heavy borrowing is a different story from strong cash flow with none.

A short checklist

• I have compared free cash flow with net income over several years.
• I know what drives the difference.
• I understand how much capital spending is needed to maintain the business.
• I have checked how the cash is being used.

Cash flow is not a guarantee of a good investment, but it is one more lens that helps separate durable businesses from those that only look good on paper.