Reading a P&L statement without an accounting degree

A profit-and-loss statement is a single subtraction performed in stages. Revenue goes at the top, costs are taken away in groups, and what survives to the bottom is profit. The reason it is presented in stages rather than as one calculation is that each stage answers a different question, and the stages are more informative than the answer.

Read top to bottom, the standard sequence is: revenue, then cost of goods sold, giving gross profit; then operating expenses, giving operating profit, which is often reported alongside a figure called EBITDA; then interest and depreciation; then tax; and finally net profit. Layouts vary, some businesses have no cost of goods sold worth separating, and your accountant's format may group things differently, but the logic of moving from the most direct costs to the most indirect is common to all of them.

The crucial framing is that this statement covers a period and is built on when things were earned and incurred rather than when money moved. It is not a record of your bank account. A month with excellent profit and a falling bank balance is entirely possible and is not a contradiction. Expecting the bottom line to match the change in cash is the single most common misreading, and it makes the whole statement look wrong when it is not.

Revenue is the value of what you sold during the period, which is not the same as what you were paid during the period. A sale invoiced in March on sixty-day terms is March revenue. It is also worth checking what your revenue line is net of: returns, trade discounts and GST should not be sitting inside it, since GST collected is not yours and inflates the figure if left in.

Cost of goods sold is the direct cost of the things you actually sold, and the words actually sold are the whole difficulty. It is not what you bought during the period. If you purchased stock worth a hundred units of cost and sold sixty, only the sixty belong in cost of goods sold; the rest is stock on the balance sheet. This is computed as opening stock plus purchases minus closing stock, which is why the closing stock figure matters so much: it is the valve controlling how much cost reaches the statement, and an inaccurate stock count produces an inaccurate profit directly.

What counts as direct varies by business and should be applied consistently. For a trader it is the purchase price plus inward freight. For a manufacturer it includes materials and production labour. For a service business the concept may not apply cleanly at all, and the statement may sensibly go straight from revenue to operating expenses.

Gross profit is revenue minus cost of goods sold, and as a percentage of revenue it is the gross margin. For most small businesses this is the single most informative figure in the statement, and it is routinely ignored in favour of the bottom line.

The reason it carries so much information is that it isolates the economics of the transaction itself from everything else. It answers whether you are selling at a sensible price relative to what the goods cost you, a question unaffected by how much rent you pay or how the business is financed. If the gross margin is inadequate, no amount of cost control further down the statement fixes the business, because the problem is in the pricing or the buying.

It is also the line where a change is most diagnostic. A falling gross margin has a short list of possible causes: selling prices dropped, whether by discounting or by mix shifting toward cheaper lines; purchase costs rose and were not passed on; wastage, theft or obsolescence increased; or the stock count is wrong. Each is checkable. Compare the margin month to month and against the same month last year, and treat a move of any size as something to explain rather than to note. A business that watches one number should watch this one.

Operating expenses are the costs of running the business rather than of the goods themselves: rent, salaries, utilities, marketing, professional fees, insurance, repairs. These are largely fixed in the short term, which is what makes them dangerous when revenue falls and powerful when it rises. Revenue minus cost of goods sold minus operating expenses gives operating profit, the profit from trading before the effects of financing and accounting policy.

EBITDA is earnings before interest, tax, depreciation and amortisation, and it is popular because it approximates the cash the operations generate before financing decisions and before non-cash charges. It is genuinely useful for comparing two businesses with different debt levels. It is also the figure most often quoted when the ones below it are unflattering, and treating it as a proxy for cash is a mistake, since it ignores capital spending, loan principal and any change in working capital, all of which consume real money.

Below operating profit sit interest, which reflects how the business is financed rather than how it trades; depreciation and amortisation, which spread the cost of assets already bought across the years of use and move no money in the period; and tax. Net profit is what remains. It is the most quoted line and the least diagnostic, because it is the accumulation of everything above it and a change in it tells you nothing about which stage moved.

A statement becomes useful when read as a comparison rather than a set of values, because a number on its own has no meaning. Ten lakh rupees of salaries is neither good nor bad.

So ask two things of every line. First, what is it as a percentage of revenue? Converting the whole statement to percentages is the fastest analysis available and takes a few minutes. It makes lines comparable across periods of different size and immediately shows where the money goes. Second, how does that percentage compare with the same line last period and the same period last year? The second comparison matters separately because many businesses are seasonal, and comparing December with November confuses a seasonal pattern with a trend.

When a percentage moves, the question is which of the two components moved, and it is worth being explicit about it. Rent rising from six per cent of revenue to nine per cent may mean the rent went up, or may mean revenue fell while the rent stayed exactly the same. Those are different problems with different responses, and the percentage alone does not distinguish them. Always look at the absolute figure alongside the ratio.

Anything you cannot explain is the finding. An unexplained movement is not a small mystery to be tolerated; it is either a real change in the business or an error in the books, and both are worth an hour.

A profit-and-loss statement has three significant blind spots, and knowing them is part of reading it competently.

It does not show cash. Capital purchases, loan principal repayments and owner drawings all take money out of the bank without appearing as expenses, and depreciation reduces profit without moving money. So the bottom line and the change in the bank balance are different numbers for structural reasons, not because something is wrong.

It does not show what you own or owe. A business can be profitable and insolvent. Assets, liabilities, stock and receivables live on the balance sheet, and reading the profit-and-loss statement alone gives you a picture of a period with no picture of the position at the end of it.

It contains estimates that are presented with the same authority as facts. Closing stock value, depreciation rates, and any provision for doubtful debts are all judgements, and they change the profit figure directly. That is not a criticism of accounting, it is how accrual accounting necessarily works, but it means profit is a considered opinion built on measurements rather than a measurement.

This is also the limit of what a reporting tool can do for you. Any system can compute these lines and their ratios from the ledger and highlight what moved. What it cannot do is know whether the closing stock was counted honestly, whether a receivable is collectible, or why marketing spend tripled in September. Those answers are in the business, and a statement is only ever as good as the entries and estimates beneath it.