The MadBrooks Professor

Financial Statements Part 1: The Income Statement

May 31, 2026 · 9:10 AM CT · 8:53 · The MadBrooks Professor | Financial Statements Part 1 | The Income Statement | 5/31/2026

Break down the income statement line by line. Revenue, COGS, gross profit, operating expenses, EBITDA, net income.

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Transcript

If you cannot read an income statement, you cannot value a company, period.

The income statement tells you one thing: did this business make money or lose money over a specific period of time? That period is usually a quarter or a year. Unlike the balance sheet, which is a snapshot of what a company owns and owes at a single moment, the income statement is a movie. It shows the flow of money coming in and going out as the business operates. Every publicly traded company files these statements with the SEC, and if you want to invest intelligently rather than gamble, you need to know how to read them.

Let's start at the top with revenue, also called sales or the top line. Revenue is the total amount of money a company brings in from selling its products or services before any expenses are subtracted. Notice I said brings in, not collects. Under accrual accounting, which is what most companies use, revenue gets recognized when it's earned, not necessarily when cash hits the bank account. If Apple ships an iPhone to a retailer in December, that sale counts as December revenue even if the retailer pays in January. This matters because a company can show growing revenue while simultaneously running out of cash, which is how businesses die.

Revenue recognition can get complicated depending on the industry. Software companies that sell annual subscriptions recognize that revenue over twelve months, not all at once. Construction companies working on multi-year projects recognize revenue as the work progresses. The rules matter, and companies that play games with revenue recognition tend to end badly. When you see revenue growing much faster than cash flow from operations over multiple quarters, that's a red flag worth investigating.

Next comes cost of goods sold, abbreviated COGS, sometimes called cost of revenue or cost of sales. This represents the direct costs of producing whatever the company sells. For a manufacturer like Ford, COGS includes the steel, rubber, glass, and labor that goes into building a car. For a retailer like Walmart, COGS is what they paid to buy the inventory sitting on their shelves. For a software company like Salesforce, COGS includes the server costs and support staff directly tied to delivering the service to customers.

The key word is direct. COGS does not include the CEO's salary, the marketing budget, or the rent on corporate headquarters. Those are operating expenses, which come later. The line between COGS and operating expenses can get blurry, and companies have some discretion in how they classify certain costs. Pay attention to whether these classifications stay consistent from quarter to quarter.

When you subtract COGS from revenue, you get gross profit. This number tells you how much money the company has left after covering the direct costs of production. More important than the absolute number is the gross profit margin, which is gross profit divided by revenue, expressed as a percentage. If a company generates one hundred million in revenue and has sixty million in COGS, gross profit is forty million and the gross margin is forty percent.

Gross margin reveals the fundamental economics of a business model. Software companies often have gross margins above seventy or eighty percent because once the software is built, delivering it to additional customers costs almost nothing. Grocery stores operate on gross margins around twenty-five percent because food is expensive to buy and spoils quickly. You cannot directly compare the gross margin of a software company to a grocery chain, but you absolutely should compare a company's gross margin to its competitors and to its own history. If Kroger's gross margin is steady at twenty-three percent and suddenly drops to nineteen percent, something changed, and you need to find out what.

Below gross profit, we enter the operating expenses section. This is where all the indirect costs of running the business show up. Research and development, sales and marketing, general and administrative expenses. R&D is what the company spends creating new products or improving existing ones. For a pharmaceutical company like Pfizer, R&D is enormous because developing new drugs costs billions. For a bank, R&D barely exists.

Sales and marketing includes the salaries of the sales team, advertising costs, trade show expenses, everything spent to convince customers to buy. General and administrative, often called G&A, covers corporate overhead like executive salaries, legal fees, accounting costs, and rent for non-production facilities. When activists investors push for cost cuts, G&A is usually where they look first.

Some income statements break these expenses out separately. Others lump them together under total operating expenses. Either way, when you subtract operating expenses from gross profit, you arrive at operating income, also called operating profit or EBIT, which stands for earnings before interest and taxes. This number tells you how much profit the core business generates before accounting for how the company is financed or what it owes the government.

Operating income is one of the cleanest measures of business performance because it excludes the noise from capital structure decisions. Two identical companies with identical operations can have very different net income if one is financed with debt and the other with equity, but their operating income will be the same.

Here's where EBITDA enters the conversation. EBITDA stands for earnings before interest, taxes, depreciation, and amortization. You calculate it by taking operating income and adding back depreciation and amortization. Depreciation is the accounting expense for physical assets like machinery wearing out over time. Amortization is the same concept applied to intangible assets like patents or acquired customer lists.

Wall Street loves EBITDA because it approximates cash generation before financing decisions. The argument is that depreciation and amortization are non-cash expenses, so adding them back gives you a better sense of the actual cash the business produces. This logic has merit, but EBITDA also gets abused. Companies with terrible business models tout EBITDA to distract from their lack of real profitability. Remember, depreciation represents real economic costs. That factory equipment will eventually need replacement, and that requires real cash. A company showing strong EBITDA but negative net income year after year is not a hidden gem. It's a value trap.

Moving down the statement, we hit interest and taxes. Interest expense is what the company pays on its debt. More debt means more interest expense, which reduces profit. Interest income, if the company has it, comes from cash or investments earning a return. These get netted together in a line often called interest and other income.

After interest comes taxes. This is the income tax expense based on the company's pre-tax income and applicable tax rates. Tax rates vary by jurisdiction, and companies with international operations can have complex tax situations. Some quarters show unusually high or low tax rates due to one-time items. Don't read too much into a single quarter's tax rate.

Finally, after subtracting interest and taxes from operating income, you arrive at net income, also called net profit, net earnings, or the bottom line. This is what the company earned for its shareholders during the period. It's the number that drives headlines and moves stock prices.

Net income gets divided by the number of shares outstanding to calculate earnings per share, or EPS, which is the single most watched metric in public markets. If a company earned one hundred million and has fifty million shares, EPS is two dollars. Price-to-earnings ratios, dividend coverage, analyst estimates, all flow from EPS.

But net income can be manipulated. Companies have discretion on depreciation methods, tax strategies, revenue recognition, and dozens of other accounting choices. Which is why you never evaluate a company on one metric alone. You read the income statement alongside the balance sheet and cash flow statement. You compare to competitors. You look at trends over years, not quarters. You read the footnotes.

We are out of time. Next session continues with Part 2. The income statement tells you if money flowed in or out, but only the cash flow statement tells you if that money was real.

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AI generated. Not financial advice.