Lesson 3 of 11 16 min
Reading an Income Statement
Walk through an income statement line by line.
Written by Mateo LermaLast reviewed 3 sourcesEditorial standards
All lessons in Understanding Businesses
Step 1: The lesson
How do you read an income statement?
The income statement (also called the profit and loss statement, or P&L) shows revenue, expenses, and profit over a period of time — usually a quarter or a year.
It reads from top to bottom, like a staircase. Each step subtracts another kind of cost. That's why net income is called the bottom line.
- Revenue (sales)
- − Cost of goods sold → Gross profit
- − Operating expenses (wages, rent, marketing, research) → Operating income
- − Interest on debt → Pre-tax income
- − Income taxes → Net income
One statement tells you a little. Comparing periods tells you a lot. Is revenue growing? Are margins rising or shrinking? Is profit growing faster or slower than sales?
Where to find real ones
Public U.S. companies file their financial statements with the Securities and Exchange Commission. You can read them free on the SEC's EDGAR website or in a company's investor relations page.
Step 2: See it
Trailhead Outfitters: income statement for the year
A hypothetical outdoor gear retailer has revenue of $2,400,000, gross profit of $1,080,000, operating income of $300,000, pre-tax income of $260,000 after $40,000 of interest, and net income of $205,400 after $54,600 of taxes.
- Revenue
- $2,400,000
- Cost of goods sold
- −$1,320,000
- Gross profit45% margin
- $1,080,000
- Operating expenses
- −$780,000
- Operating income12.5% margin
- $300,000
- Interest expense
- −$40,000
- Pre-tax income
- $260,000
- Income taxes
- −$54,600
- Net income8.6% margin
- $205,400
Step 3: Real-world example
What changed since last year?
Last year, Trailhead had $2,000,000 in revenue and $150,000 in net income. This year: $2,400,000 and $205,400.
- Revenue grew 20%.
- Net income grew 37% — faster than revenue.
- Net margin rose from 7.5% to 8.6%.
When profit grows faster than sales, the business is getting more efficient — often because fixed costs are spread over more sales. That's a good sign. The next question: can it last?
Step 4: Try it
Build an income statement
Enter Trailhead's numbers — revenue $2,400,000, COGS $1,320,000, operating expenses $780,000 — and compare the margins.
Your numbers
Direct costs of what was sold: ingredients, inventory, materials.
Running the business: wages, rent, marketing, software.
Results
Gross margin
45%
Operating margin
12.5%
Net margin
8.6%
$205,400 net profit
| Revenue | $2,400,000 |
|---|---|
| − Cost of goods sold | −$1,320,000 |
| Gross profit45% margin | $1,080,000 |
| − Operating expenses | −$780,000 |
| Operating income12.5% margin | $300,000 |
| − Interest and taxes | −$94,600 |
| Net profit8.6% margin | $205,400 |
Educational calculator, not financial advice. Results are hypothetical estimates based on the numbers you enter.
Step 5: Knowledge check
Quiz: Reading an Income Statement (3 questions)
Answer each question, then check your answer to see the explanation. Retake it as many times as you like.
Question 1 of 3
Step 6: Summary
Summary: Reading an Income Statement
The income statement shows revenue, expenses, and profit over a period. It steps down from revenue to gross profit, operating income, pre-tax income, and net income. Comparing periods — growth rates and margins — reveals whether a business is getting stronger.
Step 7: What you should remember
Key takeaways: Reading an Income Statement
- Income statement = performance over a period.
- Revenue → gross profit → operating income → net income.
- Compare periods: growth and margin trends matter most.
- Real filings are free on the SEC's EDGAR site.
Key terms in this lesson
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Sources and further reading
Rules, rates, and official figures in this lesson are based on these sources. People and numbers in examples are hypothetical.
- 1.Beginners' Guide to Financial Statements (opens in a new tab)
U.S. Securities and Exchange Commission · sec.gov
- 2.How to Read a 10-K/10-Q (opens in a new tab)
Investor.gov (U.S. Securities and Exchange Commission) · investor.gov
- 3.EDGAR Full Text Search (opens in a new tab)
U.S. Securities and Exchange Commission · sec.gov
Cite this lesson
Financial Literacy Club. (2026, September). Reading an income statement. https://learnwithflc.org/courses/understanding-businesses/income-statement
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