An income statement — also called a profit and loss statement or P&L — is a financial document that summarizes a business’s revenues, costs, and expenses over a specific period. It answers a single question: did the business make or lose money during this time?
The structure follows a subtractive logic. Revenue (total sales) minus cost of goods sold (the direct costs of producing what was sold) yields gross profit. Gross profit minus operating expenses (rent, wages, marketing, utilities) yields operating income. Operating income minus taxes and interest yields net income — the final figure that represents profit or loss. Each layer of subtraction strips away a category of cost, making visible where money is consumed on its way from customer to owner.
In a pro forma context, the income statement is constructed from assumptions rather than historical data. Each line item encodes a claim: projected revenue depends on assumptions about average check and customer volume; projected costs depend on assumptions about supply chain pricing and labor rates. The income statement’s apparent precision — dollars and cents, neat rows, a bottom line — can obscure the speculative character of these inputs.
The P&L is one of three documents that compose a full set of financial projections, alongside the cash flow statement and the balance sheet.
Related terms
- Financial projections — the broader forecasting framework
- Revenue model — the structure that generates the top line
- Break-even analysis — the point where revenue equals total costs
- Average check — a key input for revenue estimation