How to Read an Income Statement
Revenue at the top, net income at the bottom, and three profit lines in between. What each line tells you — and the common traps.
By the Sixth Element team · Updated Oct 15, 2026
The income statement (also called the profit and loss statement, or P&L) answers one question: over a period of time, how much did the company sell, what did it cost, and what was left? Read it from top to bottom.
Top to bottom
- Revenue — everything customers paid. The “top line”.
- Cost of revenue — the direct cost of what was sold: materials, production, delivery.
- Gross profit — revenue minus cost of revenue.
- Operating expenses — running the company: research, sales and marketing, management and offices.
- Operating income — gross profit minus operating expenses. Profit from the business itself.
- Interest and taxes — the cost of borrowing, and the government's share.
- Net income — what's finally left. The “bottom line”.
The three profit lines
Each profit line tells you something different. Gross profit shows whether each sale is worth making at all. Operating income shows whether the business as a whole earns money. Net income is what's left for shareholders after everyone else is paid. Comparing each with revenue — out of every $100 of sales — makes companies of different sizes easy to compare. See What Does “Profitable” Really Mean?
Annual, quarterly and “trailing twelve months”
Companies report every quarter and every year. Quarters can be seasonal — a toy maker sells most in the last months of the year — so compare a quarter with the same quarter a year earlier, not the one just before. “Trailing twelve months” adds up the latest four quarters to give an up-to-date yearly figure.
Common traps
- One-off items. Selling a building or settling a lawsuit can swing net income in a single year. Operating income usually shows the underlying business more clearly.
- Share counts. If the company issues lots of new shares, profit per share can fall even while total profit rises. Look at earnings per share (EPS) too.
- Profit isn't cash. The income statement follows accounting rules about when money counts. Check the cash flow statement as well — see What Is Free Cash Flow?
Out of every $100 of sales
- Revenue
- $100
- Gross profit
- $45
- Operating
- $18
- Net income
- $12
Why this matters
The income statement is where growth and profitability come from. Once you can read it top to bottom, the questions “is it growing?” and “does it make money?” stop being something you take on trust. Sixth Element shows each company's statements with every line explained and the filing each figure came from.
Try it in Sixth Element
Open any company's financial statements on Sixth Element: every line has a plain explanation and the filing it came from.
General education, not investment advice. Examples use invented businesses and illustrative numbers.
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