How to Read a Profit & Loss Statement
Your bookkeeper sends you a profit and loss statement every month. Most business owners glance at the bottom line and file it away. But a P&L is one of the most useful tools you have for running your business — if you know what to look for. This guide walks through every major line item and what it tells you.
Written by Luisa — Federally authorized Enrolled Agent & Founder, Simple Books Now · Palm Coast, FL
What Is a Profit & Loss Statement?
A profit and loss statement (also called an income statement) shows your revenue, costs, and expenses over a specific period — usually one month, one quarter, or one year. It answers one question: did your business make money during this period? Unlike a balance sheet (which shows what you own and owe at a point in time), a P&L shows performance over time.
Revenue (Top Line)
Revenue is what your business collected from customers before any expenses are deducted. If you have multiple revenue streams — services and products, for example — a well-structured P&L shows them separately. Look at revenue month-over-month and year-over-year. Is it growing? Seasonal? Concentrated in a few clients? The revenue section tells you the size and shape of your business.
Cost of Goods Sold (COGS)
COGS includes the direct costs of delivering your product or service — materials, direct labor, manufacturing costs. For a product-based business, this is inventory and production costs. For a service business, it may include subcontractor costs or direct labor. Revenue minus COGS equals gross profit. Your gross profit margin (gross profit ÷ revenue) tells you how efficiently you're delivering your core product or service.
Gross Profit
Gross profit is what's left after COGS — before overhead expenses. A healthy gross margin varies by industry: product businesses may run 30–50%, service businesses often run 50–70% or higher. If your gross margin is shrinking over time, your direct costs are growing faster than your revenue — a warning sign worth investigating.
Operating Expenses
Operating expenses are overhead — what it costs to run the business regardless of how much you sell. Rent, utilities, insurance, marketing, software, salaries, professional fees. These are fixed or semi-fixed costs that don't change much with revenue volume. The goal is to grow revenue faster than operating expenses so your operating margin expands over time.
Net Income (Bottom Line)
Net income is revenue minus all expenses — COGS plus operating expenses. This is your "profit" in the traditional sense. But net income on a P&L is not the same as cash in your bank account. Net income is an accounting figure that can differ from cash flow due to timing differences, loan payments, and owner draws. Don't confuse a profitable P&L with a healthy cash position — they're related but different.
What to Look For Every Month
When you review your P&L, focus on:
• Revenue trend — is it growing, flat, or declining compared to last month and last year?
• Gross margin — is it stable or compressing?
• Any expense category that jumped significantly — investigate before it becomes a pattern
• Net income vs. last period — are you more or less profitable?
• Owner\'s draw or compensation — is it sustainable given your net income?
Your bookkeeper should be able to explain any significant changes. If they can\'t, that\'s a problem.
Frequently Asked Questions
A P&L shows performance over a period of time — revenue, expenses, and profit for a month, quarter, or year. A balance sheet shows your financial position at a single point in time — what you own (assets), what you owe (liabilities), and the difference (equity). Both are essential; the P&L tells you how the business is performing, the balance sheet tells you where it stands.
Because P&L is based on accrual or cash accounting of income and expenses, while your bank account reflects actual cash movements. Loan payments, owner draws, deposits collected in advance, and expenses paid before they're recorded all create differences. Your bookkeeper can reconcile these — and it's worth understanding the gap.
Monthly at minimum. Ideally, your bookkeeper delivers the prior month's P&L by the 15th of the following month, and you review it promptly. Quarterly reviews with your bookkeeper or EA for trend analysis and tax planning are also valuable.
It varies significantly by industry. Retail businesses often run 2–6%. Service businesses can run 10–20% or higher. Restaurants typically run 3–9%. The more relevant benchmark is your own trend over time — are you improving? — and comparison to industry averages for your specific sector.
They should. If your bookkeeper just sends you a report without any explanation of notable changes, that's a missed opportunity. At Simple Books Now, every monthly delivery includes a summary of what changed and why — so you can actually use the information to run your business.
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