How to read a profit and loss statement line by line, the margins that matter, a worked example, and what a P&L will not tell you about your cash.
Quick answer: To read a profit and loss statement, start at the top with revenue, subtract the cost of goods sold to get gross profit, subtract operating expenses to get operating income, then account for other items and tax to reach net income. Compare periods and margins to see what is changing. A P&L shows profit, not cash.
Many business owners glance at the bottom line and move on, which means they miss the useful part of the report. The lines above it can tell you whether you have a pricing problem, a cost problem or a growth problem. This guide walks through each section in plain English, even if you have never studied accounting.
In this article
- What Is a Profit and Loss Statement?
- What Does Each Line Mean?
- Worked Example
- Which Margins Should You Watch?
- How to Read It in Five Steps
- P&L vs Balance Sheet vs Cash Flow
- What a P&L Will Not Tell You
- What to Do With What You Find
- Frequently Asked Questions
- Final Thoughts
What Is a Profit and Loss Statement?
A profit and loss statement, also called a P&L or an income statement, summarizes your income and expenses over a period, such as a month, quarter or year. Its main job is to answer one question: did the business make money during that time?
You can get one from accounting software or from your bookkeeper. Check that it covers the correct dates, and whether it uses accrual or cash accounting, as this affects when income and costs appear.
What Does Each Line Mean?
1. Revenue
This is income from your sales or services. It may also be called sales or turnover, and it may be split by product or service.
2. Cost of goods sold (COGS)
These are direct costs of what you sold, such as inventory or production materials. Service businesses often have little or none, or they may count direct labor here.
3. Gross profit
Revenue minus COGS. This shows what is left to pay for running the business.
4. Operating expenses
These are the costs of running the business, including rent, wages, software, insurance and advertising.
5. Depreciation
This spreads the cost of equipment or vehicles over time. It is often recorded at year-end, so mid-year numbers may look better than they will after adjustment.
6. Operating income
Gross profit minus operating expenses and depreciation. This shows how well the core business performs.
7. Other income and expenses
These are items outside normal trading, such as investment gains, interest or a legal settlement.
8. Net income
What remains after everything, including tax. This is the famous “bottom line”.
Worked Example
| Line | Amount |
|---|---|
| Revenue | $500,000 |
| Cost of goods sold | -$200,000 |
| Gross profit | $300,000 |
| Operating expenses | -$220,000 |
| Depreciation | -$10,000 |
| Operating income | $70,000 |
| Interest expense | -$5,000 |
| Income tax | -$15,000 |
| Net income | $50,000 |
This imaginary company has a 60% gross margin, a 14% operating margin and a 10% net margin.
Which Margins Should You Watch?
- Gross margin: (Revenue – COGS) ÷ Revenue. This tells you about pricing and direct costs.
- Operating margin: Operating income ÷ Revenue. This tells you how efficiently you run the business.
- Net margin: Net income ÷ Revenue. This tells you what is left after everything.
What counts as a good margin varies by industry. A grocer and a software company can both be healthy with very different figures, so compare yourself with your own past results and similar businesses.
A bakery’s sales rise by 20% from one year to the next, and the owner celebrates. Then she spots that her gross margin has fallen from 60% to 50%, as flour and butter cost more and her prices have stayed the same. The extra sales have hidden a pricing problem. Without checking the margin, she might have simply hired more staff.
How to Read It in Five Steps
- Check the period: confirm the dates and the accounting method.
- Read from top to bottom: each subtotal feeds the next one.
- Compare periods: look at last month and the same month last year.
- Look at percentages: show each cost as a share of revenue.
- Ask why: investigate any line that changed significantly.
P&L vs Balance Sheet vs Cash Flow
| Report | Question it answers | Time covered |
|---|---|---|
| Profit and loss | Did we make a profit? | A period |
| Balance sheet | What do we own and owe? | A single date |
| Cash flow statement | Where did our cash go? | A period |
What a P&L Will Not Tell You
- Your cash balance: a profitable company can still run out of money.
- When customers pay: under accrual accounting, a sale may appear before the cash arrives.
- Loan repayments: the principal part of a loan repayment does not appear as an expense.
- Owner’s drawings: depending on your structure, they may not appear here.
- Accuracy: miscategorized expenses can make the numbers misleading.
- The future: it records the past, so you still need a forecast.
A contractor shows $40,000 of profit for the quarter but struggles to pay wages. Her P&L is correct, but $60,000 of the income is sitting in unpaid invoices. The problem is not profit; it is collection. Only looking at the P&L alongside cash flow reveals what she should fix first.
Review your P&L on the same day each month, with last year’s month next to it. A regular 20-minute habit will catch issues long before tax season does.
What to Do With What You Find
- Falling gross margin: review prices, supplier costs and discounts.
- Rising operating expenses: check subscriptions, staffing and marketing returns.
- Growing revenue and flat profit: see whether new sales are low-margin.
- One big expense: find out if it is one-off or ongoing.
- Strange numbers: ask your bookkeeper to check the categories.
Run a P&L for last month and the same month last year. Write down the three lines with the biggest percentage change and find out why each one moved.
If you are unsure what a number means, ask your bookkeeper to walk you through one report. A single short conversation can make every later report much easier to understand and act on.
Frequently Asked Questions
Is a P&L the same as an income statement?
Yes, the terms are generally used for the same report.
How often should I review it?
Monthly works well for most small businesses, with a deeper review each quarter.
What is the difference between gross and net profit?
Gross profit only deducts direct costs. Net profit deducts all costs, including overheads, interest and tax.
Why am I profitable but out of cash?
Unpaid invoices, inventory purchases and loan repayments can all use cash without appearing as P&L expenses.
Can I make one myself?
Yes, using accounting software or a spreadsheet, although an accountant can help to make sure it is accurate.
Final Thoughts
- Read the statement from revenue down to net income.
- Use margins and comparisons, not just the bottom line.
- Remember that profit and cash are different things.
- Review it monthly so that problems stay small.