Quality of earnings

In simple terms

Net profit looks like a precise number, but it is built from many estimates and choices: when to count a sale, how long machines will last, how much customers will fail to pay, what an asset is worth. Two honest accountants can produce different profits from the same business.

Earnings quality is the degree to which reported profit reflects real, repeatable cash generation. High-quality earnings come from the ordinary business, turn into cash, and use cautious accounting. Low-quality earnings rely on one-off gains, optimistic estimates or profit that never seems to become cash.

Test 1: does profit turn into cash?

Because of accrual accounting, profit and cash differ in any single year. Over several years, though, a healthy business's operating cash flow should broadly match its net profit, after allowing for depreciation and working capital.

Use several years, not one. Growing companies naturally invest in working capital, so their conversion is lower; but a long-running gap needs a convincing explanation.

Test 2: how much profit is one-off?

Some items in the income statement are unlikely to repeat:

• Gains on selling assets, such as land, a factory or a stake in another company.
• Exceptional or extraordinary items, both gains and charges, such as restructuring costs, write-downs or insurance receipts.
• Large other income, such as interest, dividends or fair-value gains on investments, which is not from the core business.
• Unusually low tax, from one-off credits or reversals.

Strip these out to find recurring or core profit. A company whose profit growth comes mainly from other income or asset sales is not growing its business. Equally, a company that reports large "one-off" charges every single year has costs that are not really one-off.

Test 3: how is revenue recognised?

Revenue should be recorded when the company has delivered what the customer paid for. Aggressive practices bring revenue forward:

• Pushing goods into distributors at the end of a period, sometimes with generous credit or return rights, so that sales jump and then fall back.
• Recognising long contracts too quickly, by overestimating how much work is complete.
• Recording sales before delivery, for example when goods are still held by the seller.

Signs include receivables growing much faster than revenue, a jump in sales in the last weeks of a quarter, and changes to the revenue policy in the notes.

Test 4: are costs being pushed into the future?

Capitalising a cost means recording it as an asset on the balance sheet and spreading it over future years, rather than charging it against this year's profit. That is correct for genuine long-lived assets. But capitalising ordinary running costs, such as routine software work, maintenance or marketing, raises today's profit at the expense of future years.

Watch for capital expenditure or "intangible assets under development" growing much faster than the business, and for capitalised costs that are later written off.

Test 5: have estimates changed?

Changing an estimate can change profit without any change in the business:

• Longer useful lives for assets lower depreciation.
• Smaller provisions for bad debts, warranties or obsolete stock lower expenses.
• Changes in accounting policy can move profit between years.

These changes must be disclosed in the notes. A string of changes that all raise profit is a warning sign.

Putting it together

No single test is decisive. A useful habit is to keep a short list for each company you study: cash conversion over five years, the share of profit that is one-off, receivables growth compared with revenue growth, capitalised costs, and any changes in policies or estimates. Patterns across several tests matter more than any one.

Why it matters

Valuations are usually built on profit. If profit is flattered, the valuation is too high, and the market often corrects this suddenly when cash fails to arrive or one-offs stop recurring. Earnings quality analysis also gives early warning of businesses in trouble, and in some cases of accounting manipulation, covered in the financial red flags lesson.

Limitations

All the tests need judgement. Fast-growing businesses can have low cash conversion for good reasons; some genuinely one-off events are unavoidable; and conservative accounting can make good businesses look less profitable. Low earnings quality is a reason to investigate further, not proof of wrongdoing.

Common mistakes

• Treating net profit as an objective fact. It rests on estimates and choices.
• Judging cash conversion on one year. Use several.
• Counting one-off gains as growth. Look at recurring profit.
• Ignoring the notes. Policy and estimate changes are disclosed there.

Try it yourself

Pick a listed company and gather five years of data from its annual reports.

1. Add up net profit and operating cash flow over the five years and calculate cash conversion.
2. List any exceptional items and other income, and calculate profit without them.
3. Compare the growth in receivables with the growth in revenue.
4. Read the accounting policies note for any changes in policies or estimates, and note their effect on profit.