TL;DR
Your P&L tells you whether your business is making money and where it's going. Here's how to read it quickly, spot problems, and know what questions to ask.
I've sat across from hundreds of business owners and asked them: "How was last month?" Most give me a feeling. "It was busy." "I think we did okay." "Better than January." That's not a number. That's a vibe.
Your P&L gives you the actual answer in about 5 minutes if you know where to look. According to a Xero study, business owners who review their financials monthly are 30% more likely to be profitable. Let's make you one of them.
The Structure
A P&L (also called an income statement) has four sections, from top to bottom: Revenue, Cost of Goods Sold (COGS), Operating Expenses, and Net Income. That's it. Everything else is detail within those four buckets.
Step 1: Look at Revenue (30 Seconds)
Top line. How much money came in. Look at total revenue for the month, then compare it to the same month last year and to your budget.
Revenue up 15% year-over-year? Good. Revenue flat while you've been spending on marketing? That needs investigation. Revenue down 10% for three months in a row? That's a trend, not a blip.
If you have multiple revenue streams, check each one. I had a client whose total revenue looked flat, but when we broke it down, one service line was up 25% and another was down 40%. The flat total was hiding a serious problem.
Step 2: Check Gross Margin (60 Seconds)
Revenue minus COGS equals gross profit. Gross profit divided by revenue gives you gross margin percentage. This is the most important number on your P&L.
For a service business, gross margin should typically be 50% to 70%. For retail or distribution, 25% to 40%. For software, 70% to 85%. These vary by industry, but if your gross margin is shrinking month over month, you have a pricing problem, a cost problem, or both.
COGS includes direct labour (wages for people delivering the service), materials, subcontractors, and any other cost directly tied to revenue. If COGS is growing faster than revenue, you're becoming less efficient with every dollar you earn.
Step 3: Review Operating Expenses (2 Minutes)
These are the costs of running the business that aren't directly tied to delivering your product or service. Rent, utilities, insurance, software, marketing, admin salaries, professional fees.
Look at total OpEx as a percentage of revenue. If it's creeping up, find out why. Sort expenses by size, largest first. Your top 5 expense categories probably represent 80% of total OpEx.
Look for surprises. Did a software subscription jump from $200 to $800 per month? Did travel expenses double? Did professional fees spike because of a one-time project? Surprises in OpEx are where money leaks hide.
Step 4: Check the Bottom Line (30 Seconds)
Net income (or net loss) is what's left after everything. Revenue minus COGS minus OpEx minus taxes minus interest. This is your profit.
Express it as a percentage of revenue. For most healthy small businesses, 10% to 20% net margin is the target. Below 5% and you're one bad month away from a loss. Above 20% and you're doing well, but check if you're underinvesting in growth.
The Comparison That Matters
A single month's P&L is useful but limited. The real insight comes from comparison. Run your P&L with monthly columns for the last 12 months. Now you can see trends: Is revenue growing or flat? Are expenses creeping? Is margin stable or declining?
Then compare to budget. If you don't have a budget, compare to last year. The question is always: "Is this month better or worse than expected, and do I know why?"
Red Flags to Watch For
- Revenue up but profit down. You're spending more to earn more. Check COGS and OpEx growth rates.
- Gross margin below industry average. Your pricing or cost structure needs work.
- One expense category growing faster than revenue. Something is out of control.
- Net income bouncing between profit and loss. Your break-even point is too close to your revenue. You have no margin for error.
What to Do This Week
- Pull your P&L from QuickBooks. Run it for last month with comparison to same month last year.
- Calculate your gross margin. Is it above your industry benchmark?
- Identify your top 5 expenses. Do any of them surprise you?
- Set a monthly calendar reminder. Fifteen minutes on the 15th of every month to review last month's P&L. That's all it takes.
The Bottom Line
Reading a P&L takes 5 minutes. Not reading it costs you thousands in missed problems and missed opportunities. Make it a monthly habit. If you're not sure what your numbers are telling you, book a free call and I'll walk you through it.
Next step: run your numbers through the free CFO scorecard.
Frequently Asked Questions
- What is the most important number on a P&L?
- Gross margin percentage. It tells you how much of every dollar of revenue is left after paying for direct costs. If your gross margin is shrinking, profitability problems are coming regardless of what you do with overhead.
- How is a P&L different from a balance sheet?
- A P&L shows revenue and expenses over a period of time (like a movie). A balance sheet shows what you own and owe at a specific point in time (like a photograph). You need both to understand your business.
- How often should I review my P&L?
- Monthly. Compare each month to the same month last year and to your budget. Look for trends over 3 or more months rather than reacting to a single month's numbers.
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