To understand a company's financial health, you need to look at three key documents: the income statement, the balance sheet, and the cash flow statement. Think of them as three different chapters of the same story. Each one gives you a unique perspective, but when you read them together, you get the full picture of how the business is doing.

The income statement is like a company's report card for a specific period, such as a quarter or a full year. It shows whether the company was profitable during that time. It starts with the company's total sales, or revenue, and subtracts all the costs and expenses incurred to generate that revenue.

The basic formula is straightforward:

Key items you'll find on this statement include:

• Revenue: The total amount of money earned from selling goods or services.
• Cost of Goods Sold (COGS): The direct costs of producing the goods sold by a company.
• Gross Profit: What's left after subtracting COGS from revenue ($\text{Revenue} - \text{COGS}$).
• Operating Expenses: Costs not directly related to production, like salaries, rent, and marketing.
• Net Income: The final profit after all expenses, including taxes, have been deducted from revenue.

While the income statement covers a period of time, the balance sheet is a snapshot. It shows a company's financial position at a single moment, like the last day of a quarter. It lists what the company owns (assets) and what it owes (liabilities). The difference between them is the owner's or shareholders' equity.

The balance sheet is built on a fundamental equation that must always, as the name implies, balance:

Here’s a simple breakdown:

• Assets: Resources the company owns that have economic value, like cash, inventory, and equipment.
• Liabilities: The company's financial obligations or debts, such as loans and accounts payable (money owed to suppliers).
• Equity: The value that would be left for shareholders if all assets were sold and all liabilities were paid off.

A company can be profitable on its income statement but still run out of cash. The cash flow statement explains how cash is moving in and out of the business. It acts as a bridge between the income statement and the balance sheet by tracking the cash used for operations, investment, and financing.

This statement is broken into three main activities:

• Operating Activities: Cash generated from the company's main business activities, like sales of goods or services.
• Investing Activities: Cash used for investments, such as buying or selling assets like property or equipment.
• Financing Activities: Cash from investors or banks, as well as cash paid to shareholders or used to repay debt.

These three statements are not independent; they are intrinsically linked and tell a cohesive story. For example, the net income from the income statement is a key component of the cash flow statement (in the operating activities section) and also affects the equity portion of the balance sheet.

Changes in balance sheet items like inventory or accounts receivable are also reflected in the cash flow statement. The ending cash balance on the cash flow statement must match the cash amount reported on the balance sheet for the same period. Understanding these links is key to getting a complete financial picture.