Income Statement

The statement is built as a sequence of subtractions, and each subtotal answers a different question. Revenue less cost of sales gives gross profit, which measures pricing power against direct production or purchase costs. Subtracting operating expenses such as selling, general and administrative costs, research and development, and depreciation and amortisation yields operating profit, the return generated by the business before financing and tax decisions.

Below operating profit sit non-operating items: interest expense, interest and investment income, share of profit from associates, and foreign exchange effects. The result is pre-tax income, from which income tax expense is deducted to reach net income. Where subsidiaries are not wholly owned, net income is split between the parent's shareholders and non-controlling interests. Only the parent's share feeds earnings per share, presented on both a basic and a diluted basis for companies with publicly traded shares.

Every line reflects accrual accounting rather than cash movement. Revenue is recognised when control of a good or service transfers to the customer, which may precede or follow collection, giving rise to receivables or contract liabilities. Expenses are matched to the revenue or the period they help generate, so a machine purchased once is charged against profit across years of depreciation.

That matching requires judgement, and the judgement is where earnings quality lives. Useful lives and residual values set depreciation charges; expected credit loss models set bad debt expense; inventory cost flow assumptions determine cost of sales; capitalisation decisions on development costs, software or borrowing costs move spending off the income statement onto the balance sheet. Two firms with identical economics can therefore report materially different profit. Reading the statement well means reading the accounting policy note alongside it.

IFRS permits operating expenses to be grouped by nature, such as raw materials, employee benefits and depreciation, or by function, such as cost of sales and administrative expenses. US filers typically use a function-based, multi-step format with a gross profit line, while a single-step presentation aggregates all expenses and shows one profit figure. Comparability across a peer group often requires regrouping before any margin comparison is meaningful.

Below the profit line, discontinued operations are reported separately from continuing operations so that ongoing performance can be isolated. Other comprehensive income captures gains and losses that bypass profit, including certain remeasurements of defined benefit plans, some foreign currency translation adjustments, and revaluation and hedging effects. Net income plus other comprehensive income equals total comprehensive income, the full change in equity from operating and market events excluding transactions with shareholders.

Candidates should be able to construct the statement from a trial balance of revenue and expense accounts, place an unfamiliar item in the correct section, and compute the standard margins: gross, operating, pre-tax and net, each as profit divided by revenue. Common-size analysis, expressing every line as a percentage of revenue, exposes shifts in cost structure and supports cross-sectional comparison against peers.

Basic earnings per share equals net income available to common shareholders, that is net income less preferred dividends, divided by the weighted average number of common shares outstanding during the period. Diluted earnings per share adjusts for convertible bonds and preferred shares using the if-converted method and for options and warrants using the treasury stock method, and it is never higher than basic. Candidates should also separate recurring from non-recurring items before treating any earnings figure as a basis for forecasting.