The Profit and Loss Statement (P&L) — also called the Income Statement — is the most fundamental financial report in your business. It tells you whether your business made or lost money during a specific period. Yet many small business owners and contractors never look at theirs, don’t know how to read it, or stare at the numbers without knowing what they mean. This guide teaches you to read your P&L confidently and use it to make better business decisions.
What Is a Profit and Loss Statement?
A Profit and Loss Statement summarizes your business’s financial performance over a period of time — typically a month, quarter, or year. It shows all of your income earned, all of your costs and expenses, and the resulting profit or loss. Unlike the Balance Sheet (which shows what you own and owe at a specific point in time), the P&L shows what happened over a period of time — it’s a movie of your business’s financial performance, not a snapshot. For contractors, the P&L is the primary tool for understanding whether your business is actually profitable — not just busy.
The Structure of a Contractor’s P&L
A well-organized contractor P&L has four main sections: Revenue (Income), Cost of Goods Sold (Direct Job Costs), Gross Profit, Operating Expenses (Overhead), and Net Profit.
Section 1: Revenue
Revenue is the total amount billed to clients for work performed during the period. For contractors on cash basis, this is when payments are received. For accrual basis, it’s when work is performed and invoiced. Your QuickBooks P&L can show revenue by service type if your Chart of Accounts is set up correctly — residential vs. commercial, different trades, service vs. installation. This segmentation reveals which work types drive your revenue growth.
Section 2: Cost of Goods Sold (Direct Job Costs)
Cost of Goods Sold (COGS) on a contractor’s P&L represents the direct costs of completing jobs: field labor (wages for crew members doing the work), materials and supplies, subcontractor costs, equipment rental for specific jobs, and permit fees. COGS are the costs that vary with revenue — more jobs means more direct costs. Revenue minus COGS equals Gross Profit.
Section 3: Gross Profit and Gross Margin
Gross Profit = Revenue – COGS. Gross Margin = Gross Profit / Revenue × 100%. This is the most important line on your P&L. Gross margin is the percentage of revenue left after paying direct job costs — it’s the margin available to cover overhead and generate profit. For most contractors, healthy gross margins range from 25–40%. If your gross margin is below 20%, you’re not charging enough for your work, your costs are too high, or both. Watch this number closely — a declining gross margin is an early warning signal that something is wrong with your pricing or job costs.
Section 4: Operating Expenses (Overhead)
Operating expenses are the costs of running your business that aren’t tied to specific jobs: owner’s salary or management compensation, office rent or home office, insurance (general liability, commercial auto), vehicle expenses (non-job-specific), bookkeeping and accounting fees, marketing and advertising, software subscriptions, tools and equipment (non-job-specific), and miscellaneous business expenses. Unlike direct job costs, overhead is relatively fixed — it doesn’t go down much when revenue is slow, which is why cash reserves are so important for contractors.
Section 5: Net Profit (or Loss)
Net Profit = Gross Profit – Operating Expenses. This is the bottom line — what the business earned after all costs. For contractors, a net profit margin of 8–15% is generally healthy. A negative net profit means the business is losing money — either gross margins are too low or overhead is too high (or both). Understanding which is driving the loss points you to the solution.
Key Metrics to Track on Your P&L
When you review your P&L monthly, focus on four key metrics: gross margin percentage (healthy for your trade and trending correctly), overhead as a percentage of revenue (stable or declining as revenue grows — economies of scale should improve this over time), net profit margin (8–15% target for most contractors), and revenue growth year-over-year (compare each month to the same month last year to understand true growth trends, stripping out seasonality).
Common P&L Problems and What They Mean
Revenue is growing but profit is shrinking: overhead is growing faster than revenue — investigate and cut unnecessary overhead. Gross margin is declining: job costs are increasing faster than revenue — review pricing and job cost data for overruns. Net profit is positive but cash is always tight: timing differences between when you earn revenue and when you collect it — an accounts receivable problem, not a profitability problem. Revenue is flat year-over-year: growth has stalled — evaluate your pipeline, marketing, and capacity utilization.
Frequently Asked Questions
How often should I review my P&L?
Monthly — every month, without exception. Your bookkeeper should close the prior month and deliver financial statements within the first 10 days of the new month. Schedule a 30-minute financial review on the same day each month to review your P&L, Balance Sheet, and job cost reports. This single habit creates more financial clarity than any other practice.
What’s the difference between the P&L and cash flow?
The P&L shows profitability — revenue earned minus expenses incurred. Cash flow shows actual cash movement — money in and money out. On accrual accounting, you can be profitable (positive P&L) but cash-poor (negative cash flow) if clients are slow to pay or you paid bills before collecting. On cash basis, the P&L and cash flow are more closely aligned. Understanding both is important — the P&L tells you if the business model is working; the cash flow statement tells you if you’ll have money in the bank next month.
For more information, see our guide on using financial reports to grow your business.
For more information, see our guide on cash flow vs profit.
For more information, see our guide on creating a business budget.
For more information, see our guide on when to work with a CPA.
Bookkeeping Champs Delivers Your P&L Every Month
Bookkeeping Champs closes your books monthly and delivers clean financial statements — including P&L, Balance Sheet, and cash flow — to contractors throughout Los Angeles, Ventura County, and the San Fernando Valley. Call (818) 679-4451 to get started.
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