How to read an income statement for non-accountants

Executive overview

Most leaders lack the financial literacy to influence budget decisions — not because the material is hard, but because no one has explained it simply. The income statement (also called a P&L or statement of operations) is the clearest window into whether an organisation is making money or losing it over a given period.

Learning the eight core line items takes a few hours and delivers outsized career returns. Those who can read financial statements stand out in almost every organisation — roughly 90% of business professionals cannot.

The core insight: a few hours of financial literacy is one of the highest-leverage career investments a non-accountant can make.

What the income statement is

• Shows whether a company generated a profit or loss during a specific period (month, quarter, year).
• Also called a profit and loss statement (P&L) or statement of operations.
• Governed in the US by GAAP (Generally Accepted Accounting Principles); IFRS is the international equivalent — similar in principle.
• Most publicly traded companies report quarterly and compare results to the same period a year earlier.

The eight core line items

1. Revenue — total value of all sales after discounts, rebates, and coupons. If a $20 hammer sells for $15 with a coupon, $15 is recorded as revenue.
2. Cost of goods sold (COGS) — what it cost to produce or acquire the item sold. For Home Depot: the wholesale price paid to the hammer supplier. Salaries may appear here if workers directly produce the product or service (e.g. consultants at Accenture).
3. Gross profit — Revenue minus COGS. Home Depot: $15 revenue − $10 COGS = $5 gross profit.
4. Operating expenses — all other costs of running the business: rent, utilities, insurance, management salaries, corporate overhead. Does not include items in COGS.
5. Operating income — Gross profit minus operating expenses. Shows profitability from core operations alone. Should generally be positive.
6. Non-operating income / expenses — items unrelated to running the business. Most commonly: interest paid on debt, interest earned on cash balances, and gains/losses on equity investments in other companies (e.g. Amazon's stake in Rivian). Separating this allows apples-to-apples comparisons between companies with different capital structures.
7. Pre-tax income (EBT) — Operating income plus or minus non-operating items.
8. Net income — EBT minus taxes. Also called earnings, profits, or the bottom line. Positive = profit; negative = net loss.

Depreciation vs amortization

• Depreciation — gradual write-down of a tangible asset (equipment, machinery, buildings). A $30,000 car losing $20,000 of value over 10 years = $2,000 depreciation expense per year. It is a non-cash expense — no money leaves the bank account in the year it is recorded.
• Amortization — the same concept applied to intangible assets (trademarks, copyrights, patents). Same mechanics, different asset type.
• Both may appear under COGS or operating expenses depending on management's accounting choices.

Why it matters for leaders

• Comparing income statements across periods reveals whether revenue, costs, and profit are trending up or down.
• Anomalies surface actionable problems — e.g. a spike in office supplies showing up on the P&L that was eroding profitability and required new purchasing guidelines.
• Leaders who proactively flag financial issues and propose solutions earn credibility with executives and boards.
• Even non-finance roles benefit: understanding the language of financial statements is one of the fastest ways to stand out in an organisation.

Using income statements as an investor or employee

• Target publicly traded companies that pay high stock-based compensation — the income statement tells you if they can sustain it.
• Read earnings reports when they come out; share clear summaries with colleagues to build internal credibility.
• Compare same-period results year-over-year: rising revenue with faster-rising expenses is a warning sign; the reverse signals improving efficiency.