What the statement is
A profit and loss statement, also called an income statement or P&L, summarizes a business’s income and costs over a period such as a month, quarter or year. It answers a simple question: over this time, did the business earn more than it spent?
The key point is that it covers a period, like a video of activity. A balance sheet, by contrast, is a snapshot at a single date. This article is general information; formats and rules for formal statements vary by place and accounting method.
The basic layout
Most small business P&Ls follow the same top-to-bottom order.
- Revenue (sales): money earned from selling products or services.
- Cost of goods sold (COGS): the direct cost of what you sold, such as materials or purchased stock.
- Gross profit: revenue minus COGS.
- Operating expenses: the regular costs of running the business, such as rent, wages, marketing, utilities and insurance.
- Operating profit: gross profit minus operating expenses.
- Other items: interest, and sometimes taxes or one-off gains and losses.
- Net profit (the “bottom line”): what is left after everything.
A hypothetical example
These numbers are invented for illustration. Consider one month for a small business:
| Line | Amount |
|---|---|
| Product sales | $7,200 |
| Service income | $800 |
| Total revenue | $8,000 |
| Cost of goods sold | $3,000 |
| Gross profit | $5,000 |
| Rent | $1,100 |
| Wages | $1,500 |
| Marketing | $300 |
| Utilities | $200 |
| Insurance | $150 |
| Supplies | $250 |
| Other | $100 |
| Total operating expenses | $3,600 |
| Net profit | $1,400 |
Check the arithmetic: $7,200 + $800 = $8,000. $8,000 − $3,000 = $5,000. The expenses add to $1,100 + $1,500 + $300 + $200 + $150 + $250 + $100 = $3,600. Then $5,000 − $3,600 = $1,400.
In this simplified example, taxes and interest are left out to keep things clear.
How to read it
Start at the top. Is revenue growing, flat or shrinking compared with earlier periods? A single month tells you little. Comparing several months, or the same month last year, is much more informative.
Look at gross profit. Here gross profit is $5,000 on $8,000 revenue, a gross margin of 62.5% ($5,000 ÷ $8,000). If that percentage falls over time, direct costs may be rising or discounts may be cutting into prices. The relationships between the margin types are explained in the article on gross and net margin.
Examine each expense. Which costs are largest? Which have grown fastest? Wages at $1,500 are the largest line here, followed by rent at $1,100. A line that jumps unexpectedly deserves a question: was it a one-off, or a new regular cost?
Reach the bottom line. Net profit of $1,400 is 17.5% of revenue ($1,400 ÷ $8,000). A positive result means the business earned more than it spent in the period; a negative one is a loss.
What a P&L does not tell you
- It is not your cash balance. Under the accrual method, revenue appears when earned, even if the customer has not paid. A profitable month can coexist with a tight bank account. This is why cash flow needs its own attention.
- It may leave out owner pay. In a sole proprietorship, the owner often takes money out as draws rather than wages, so net profit may need to cover the owner’s living costs.
- It does not show debts or assets. Equipment purchases and loan principal repayments generally do not appear as ordinary expenses. That information sits on the balance sheet.
- It depends on categorization. If costs are put into the wrong line, the picture is distorted.
- Timing choices matter. Whether you use cash or accrual accounting changes which period shows which items.
Questions worth asking each period
- Did revenue rise or fall, and why?
- Did gross margin hold steady?
- Which expense lines changed most?
- Is there a cost we are paying for but not using?
- If revenue dropped by 10%, would we still break even?
- How does the result compare with our business budget?
The last two connect to planning. A comparison against budget shows where reality departed from expectations, and a break-even point calculation shows how much cushion exists.
Making the statement trustworthy
A P&L is only as good as the records behind it. Record every sale and expense, categorize them consistently, and reconcile against bank statements before relying on the figures. Many small businesses review the statement monthly, which is a natural part of a regular business review.
When to ask a professional
For formal filings, loan applications or questions about how particular items should be treated, a qualified accountant can prepare or check the statement. Requirements differ by location, and lenders or tax authorities may expect a specific format.
A P&L will not predict future results, but read regularly and compared over time, it is one of the clearest views of how the business is actually performing.