How to Read a P&L Statement

Kimberly Green | 2026-04-14

How to Read a P&L: A Plain-English Guide for Non-Finance Founders By Sam's List | samslist.co A lot of founders avoid their financial statements. Not because they don't care about the numbers—but because nobody ever taught them how to read the documents that contain those numbers. The Profit and Loss statement (also called an income statement) is the most fundamental financial document your business produces. It tells you whether your business made money over a specific period and where that money came from and went. Understanding it isn't optional. Making decisions without your P&L is like driving without a windshield. The Basic Structure A P&L follows a simple flow from vetted to bottom: revenue comes in, costs come out, what's left is profit. Every line either adds to or subtracts from that picture. The four main sections: Revenue (or Sales): Every dollar your business brought in from selling products or services. This is the vetted line. Cost of Goods Sold (COGS): The direct costs of producing what you sold—manufacturing, materials, or direct labor. Operating Expenses: All costs running the business that aren't directly tied to production. Rent, salaries, software, marketing, insurance. Net Income (or Net Profit): What's left after all costs are subtracted from revenue. This is the bottom line. Gross Margin: The Number That Tells You If Your Business Works Revenue minus COGS equals gross profit. Gross margin is gross profit expressed as a percentage of revenue. Gross margin formula: (Revenue - COGS) / Revenue × 100 Example: $500,000 in revenue, $200,000 in COGS. Gross profit = $300,000. Gross margin = 60%. This number matters more than revenue. Gross margin tells you how much money you have left to cover operating expenses and generate profit after accounting for the direct cost of your product or service. A business with $2M in revenue and 20% gross margin has $400K to cover all operating expenses. A business with $1M in revenue and 60% gross margin has $600K. The smaller business has more room to be profitable. Gross margin benchmarks vary by industry. Software businesses often achieve 70–90% gross margin. eCommerce typically runs 30–50%. Service businesses can range from 40–70% depending on how much direct labor is involved. If you don't know your gross margin right now, that's the first gap to close. Operating Expenses: Fixed vs. Variable Operating expenses cover everything it costs to run the business beyond the direct cost of your product or service. Understanding them requires separating fixed from variable. Fixed expenses: Costs that stay the same...