What a profit and loss account shows you

A profit and loss account (also called an income statement) is a record of money that came in and money that went out over a set period—usually a month, quarter, or year. It tells you whether a business made money, lost money, or broke even. The bottom line is the net profit or net loss: revenue minus all expenses.

You will see this document if you own a business, work in accounting or finance, or hold stock in a company. Banks also use P&L accounts to decide whether to lend money. The format is standardized, so once you understand the pieces, you can read any P&L account.

Key Takeaways

  • A profit and loss account lists revenue at the top, then subtracts cost of goods sold, operating expenses, and taxes to arrive at net profit or loss at the bottom.
  • Revenue is money coming in; cost of goods sold is the direct cost to make or buy what you sell; operating expenses are overhead like rent and salaries.
  • Gross profit (revenue minus cost of goods sold) and operating profit (gross profit minus operating expenses) are checkpoints that show where money is being spent.
  • Comparing your P&L account across months or years shows whether the business is getting healthier or weaker, and which line items are changing most.

The three main sections: revenue, expenses, and profit

Every P&L account follows the same basic shape. At the top is revenue (also called sales or income)—the total money the business brought in before any costs. Below that are expenses, broken into categories. At the bottom is net profit or net loss—what is left after you subtract all expenses from revenue.

The math is simple: Revenue − Expenses = Net Profit (or Loss). But the value is in the detail. Each expense category tells you where money actually went, and comparing those categories over time shows you which parts of the business are growing or shrinking.

Revenue: where the money comes from

Revenue is listed first and is usually the easiest line to understand. It is the total amount of money the business received from selling products or services during the period. If a business sells ten items at $50 each, revenue is $500. If it provides services and invoices $2,000 in fees, revenue is $2,000.

Some P&L accounts break revenue into categories—for example, "Product Sales" and "Service Revenue"—if the business makes money in more than one way. This breakdown helps you see which part of the business is actually generating income. A business might have high total revenue but discover that one product line is carrying the whole operation.

Cost of goods sold: the direct cost to make or deliver what you sell

Cost of goods sold (COGS) is subtracted from revenue to get gross profit. COGS includes only the direct costs to produce or purchase the goods or services you sell: raw materials, manufacturing labor, inventory purchased for resale, or shipping costs directly tied to fulfilling orders. It does not include rent, office salaries, or marketing.

The reason COGS is separated out is that it scales with sales. If you sell twice as much, COGS roughly doubles. Other expenses (like rent) stay the same. Gross profit tells you whether your core business—making or buying and selling the product—is profitable before you pay for the building, the office staff, or advertising. A business with high revenue but low gross profit is spending too much to make what it sells.

Formula: Revenue − COGS = Gross Profit

Operating expenses: overhead and running costs

Operating expenses are the costs to run the business that are not directly tied to making the product. These include rent, utilities, office salaries, insurance, marketing, office supplies, and equipment maintenance. They are often broken into subcategories so you can see which overhead costs the most.

Operating expenses are subtracted from gross profit to get operating profit (also called EBIT, or earnings before interest and taxes). This number shows whether the business is profitable from its core operations, before accounting for debt payments or taxes. A business can have positive gross profit but negative operating profit if overhead is too high.

Formula: Gross Profit − Operating Expenses = Operating Profit

Interest, taxes, and the bottom line

After operating profit, the P&L account subtracts interest expense (money paid on loans or debt) and income tax to arrive at net profit or net loss. This is the final number: what the business actually kept after all costs and obligations.

Interest and taxes are listed separately because they are not part of running the business itself. Interest depends on how much the business has borrowed; taxes depend on profit and the tax rate where the business operates. A business can be operationally profitable but show a net loss if it carries a lot of debt or faces a large tax bill.

Formula: Operating Profit − Interest Expense − Income Tax = Net Profit (or Loss)

How to spot problems and trends in a P&L account

Reading a single P&L account tells you the current state. Comparing two or more—from different months or years—tells you whether things are improving or getting worse. Look for line items that are growing faster than revenue, or shrinking when they should be stable.

For example, if revenue grew 10% but COGS grew 20%, the business is spending more to make each sale—a warning sign. If operating expenses stayed flat while revenue doubled, the business is getting more efficient. If net profit is negative but operating profit is positive, the business is being dragged down by debt or taxes, not by the core operation.

Also check the percentages. Divide each expense by revenue to see what fraction of every dollar goes to each cost. If COGS is 40% of revenue one year and 55% the next, something has changed in how the product is made or priced. These ratios make it easier to spot trends than raw dollar amounts.

Frequently Asked Questions

What is the difference between gross profit and operating profit?

Gross profit is revenue minus the direct cost to make or buy what you sell. Operating profit is gross profit minus overhead like rent and salaries. Gross profit tells you if the product itself is profitable; operating profit tells you if the whole business is profitable before debt and taxes.

Why is cost of goods sold separate from other expenses?

COGS scales with sales—if you sell twice as much, COGS roughly doubles. Other expenses like rent stay the same. Separating them shows you whether your core business model works, independent of how much overhead you are carrying.

Can a business have positive revenue but negative net profit?

Yes. A business can bring in money but still lose money overall if expenses, interest, or taxes are higher than revenue. This is common for new businesses or those carrying heavy debt. The P&L account shows exactly where the money is going.

What should I compare when looking at two P&L accounts from different years?

Compare revenue growth, COGS as a percentage of revenue, operating expenses as a percentage of revenue, and net profit. Also look at which line items changed the most. These comparisons show whether the business is getting healthier, whether costs are under control, and where to focus attention.

Is net profit the same as cash in the bank?

No. Net profit is an accounting measure of revenue minus expenses. Cash in the bank depends on when money actually moved—a business can be profitable on paper but short on cash if customers are slow to pay or if money was spent on equipment. A cash flow statement shows the actual movement of money.