If the Balance Sheet tells you how "rich" a company is, the Income Statement (or Profit & Loss Statement) tells you how much "money it made" over a specific period. It is the most popular financial statement because it answers the most basic question in business: Are we making a profit?

However, for a fundamental analyst, the final "Net Profit" figure is just the beginning. We need to dissect the statement to see how that profit was made. Was it made by selling more products, or by cutting essential research costs? Was it a one-time gain from selling land, or is it recurring business profit?

1. The Waterfall Concept

Think of the Income Statement as a waterfall. At the very top, you have the total money coming in (Revenue). As the water flows down, various "rocks" (Expenses) take a piece of the water. Whatever reaches the pool at the bottom is yours to keep (Net Profit).

REVENUE
100%
COGS
-40%
GROSS PROFIT
60%
OPEX
-35%
NET PROFIT
25%

2. Anatomy of an Income Statement

A. Revenue (The Top Line)

Revenue is the total amount of money a company receives from selling its goods or services. Crucial distinction: Revenue is not Cash. If a company sells a laptop for $1,000 on credit (customer will pay next month), the Revenue is recorded today. This is called Accrual Accounting.

B. Cost of Goods Sold (COGS)

These are the direct costs of producing what the company sells. For a bakery, this is the cost of flour, sugar, and the baker's salary.
Gross Profit = Revenue - COGS.

C. Operating Expenses (OPEX)

These are the indirect costs required to keep the business running but not directly tied to production. Examples: Marketing, Office Rent, HR salaries, and Electricity. This section also includes Depreciation & Amortization (the non-cash loss of value of assets over time).

D. EBITDA (The Analyst's Favorite)

EBITDA stands for Earnings Before Interest, Taxes, Depreciation, and Amortization. It is a measure of the company's core operational efficiency before accounting and financial structures get in the way. It tells you: "Can this business actually make money just by running its shops?"

E. The Bottom Line (Net Profit)

After paying Interest on loans and Taxes to the government, what remains is the Net Profit. This is the amount that either gets paid out as Dividends or is moved to the Balance Sheet under "Reserves" to grow the company's equity.

3. The "Other Income" Trap

Sometimes, a company shows a massive 50% jump in Net Profit. Investors celebrate and the stock price jumps. But if you look closer, the company might have sold an old factory or received a one-time tax refund. This is called Non-Operating Income or Other Income.

Warning: Always subtract "Other Income" from Net Profit to see the "Operating Profit." If the Operating Profit is falling while Net Profit is rising, the core business is in trouble!

4. Margin Analysis

Absolute numbers can be misleading. A company making $1 Billion in profit sounds great—unless you find out they had to spend $99 Billion to get it! This is why we use Margins.

Margin Type Formula What it tells you
Gross Margin Gross Profit / Revenue Product pricing power and manufacturing efficiency.
Operating Margin EBIT / Revenue How well management controls indirect costs.
Net Profit Margin Net Profit / Revenue The overall efficiency of the entire business.

5. Earnings Quality Checklist

To be a pro investor, run this 1,000-word deep dive checklist on every P&L statement:

  1. Revenue Growth vs. Volume Growth: Is revenue growing because the company is selling more units (Good), or just because they raised prices (Temporary)?
  2. Consistency: Are margins stable? If a company's Gross Margin swings from 20% to 50% to 10%, the company has no control over its costs (like raw material price fluctuations).
  3. Tax Rate: Is the company paying the standard corporate tax? If they are paying 0%, find out if they have a special subsidy that might expire soon.
  4. Interest Coverage: Is the Operating Profit at least 3-4 times higher than the Interest expense? If not, a small drop in sales will make the company unable to pay its bank loans.

Summary of Module 6

  • The Income Statement covers a period of time (Quarter or Year).
  • EBITDA is the best way to compare operational efficiency between two companies in the same industry.
  • Avoid companies that rely on "Other Income" to show profits.
  • Focus on Operating Margins; high and stable margins indicate a strong "Economic Moat."

Now that we know how profit is calculated on paper, we need to ask the most important question: Where is the cash? Many companies show profit on the Income Statement but have no cash in the bank to pay their employees. In the next module, we master the ultimate truth-teller: The Cash Flow Statement.