What a P&L is
A profit and loss (P&L) statement, also called an income statement, shows how much money a business made and spent over a specific period. It summarizes revenue, costs, and expenses, and ends with net profit or net loss. Unlike a balance sheet, which is a snapshot at a point in time, a P&L covers a span of time such as a month, quarter, or year.
Why it matters
A P&L helps you answer practical questions quickly:
- Is the business profitable, and by how much?
- Are sales growing or shrinking?
- Are expenses rising faster than revenue?
- Which costs are eating margin?
Owners use it to run the business, lenders use it to evaluate repayment ability, and investors use it to assess performance and risk.
Key parts
Most P&Ls include the sections below. The exact labels can vary by company and accounting system.
Revenue
Revenue (sometimes called sales) is money earned from selling products or services during the period. For example, a bakery includes revenue from bread, cakes, and catering orders delivered within the month.
Cost of goods sold
Cost of goods sold (COGS) includes the direct costs required to produce what you sold, such as ingredients for a bakery or inventory costs for a retailer. Service businesses may use a similar concept like cost of services, often driven by direct labor.
Gross profit
Gross profit is:
Gross profit = Revenue − COGS
This shows how much you have left to cover operating expenses after paying direct costs.
Operating expenses
Operating expenses are the ongoing costs to run the business that are not directly tied to producing each unit sold. Common examples include:
- Rent and utilities
- Payroll for administrative staff
- Marketing and advertising
- Software subscriptions
- Insurance
- Professional fees
- Office supplies
Many P&Ls also include non-cash expenses here, such as depreciation and amortization. These reduce profit on paper, even though they do not necessarily reflect a cash payment in the current period.
Operating income
Operating income (sometimes called operating profit) is the result after operating expenses are subtracted from gross profit:
Operating income = Gross profit − Operating expenses
In many formats, operating income is close to EBIT (earnings before interest and taxes), but definitions vary by company. Some statements classify certain items differently, so it is worth checking what is included.
Other income and expenses
Many P&Ls break out items that are not part of day-to-day operations, such as interest expense on loans, interest income, or one-time gains and losses. How these are presented depends on the business and the reporting format.
Taxes are often shown near the bottom as income tax expense for corporations and other entities that record taxes at the business level. In pass-through businesses, taxes are typically paid by the owner personally, so a management P&L may not include an income tax line.
Net profit (or net loss)
Net profit is the bottom line:
Net profit = Total income − Total expenses
If expenses exceed income, the result is a net loss.
A simple example
Here is a simplified monthly P&L for a small business:
- Revenue: $50,000
- COGS: $20,000
- Gross profit: $30,000
- Operating expenses: $22,000
- Operating income: $8,000
- Interest expense: $500
- Net profit: $7,500
Two quick takeaways: gross profit tells you how efficiently you deliver the product or service, while operating income shows how well the whole operation is being managed.
Margins to watch
Margins convert dollars into percentages, which makes it easier to compare performance across months or across businesses.
- Gross margin: Gross profit ÷ Revenue
- Net margin: Net profit ÷ Revenue
In the example above, gross margin is 60% ($30,000 ÷ $50,000) and net margin is 15% ($7,500 ÷ $50,000).
Cash vs profit
A common confusion is assuming profit equals cash in the bank. Many P&Ls are prepared on an accrual basis, which records revenue when it is earned and expenses when they are incurred, even if money has not changed hands yet. That is standard for GAAP and IFRS reporting, although some small businesses use cash-basis accounting for internal reporting or tax purposes.
That means you can show a profit while cash is tight, especially if customers pay late, inventory is building up, or you paid down debt. Depreciation can also lower profit without reducing current-period cash.
To understand cash movement, pair the P&L with the cash flow statement and the balance sheet.
Common mistakes
- Mixing personal and business expenses: It distorts profitability and complicates taxes.
- Misclassifying costs: Putting COGS into operating expenses (or the reverse) can hide margin problems.
- Ignoring trends: One month rarely tells the full story. Compare periods and look for patterns.
- Forgetting seasonality: Compare to the same month last year when the business is seasonal.
- Treating owner draws as expenses: Owner draws or distributions reduce equity, not profit. They typically do not appear as an expense on the P&L.
How to use a P&L
- Review it on a schedule: Monthly is typical for small businesses.
- Compare to a budget: Variances highlight where to investigate.
- Track a few drivers: Revenue per customer, labor as a percent of revenue, marketing spend efficiency, and gross margin are common starting points.
- Ask better questions: If revenue rose but profit fell, what cost moved, and why?
Bottom line
A profit and loss statement is a straightforward tool that shows whether your business is making money over a set period and where that money is going. Read it consistently, watch margins, and use it alongside your balance sheet and cash flow statement for a fuller picture.
