A profit and loss statement is a report of revenue and expenses over a specific period, and reading it is a matter of following a simple sequence of subtractions. The document answers one question: whether the business made money, and where that money went. You start at the top with revenue, subtract the costs of delivering what you sell, then subtract the costs of running the business. What remains is net income or net loss.
Table of Contents
- What is a profit and loss statement?
- How does a profit and loss statement work?
- What are the main line items on a profit and loss statement?
- What are common mistakes business owners make when reading a P&L?
- What are the red flags to look for in a profit and loss statement?
- How can a business owner use a P&L statement to make better decisions?
- Key Takeaways
- References
What is a profit and loss statement?
A profit and loss statement, also called a P&L or income statement, is a financial statement that summarizes a company's revenues, costs, and expenses over a specific period, typically monthly, quarterly, or annually, according to Investopedia. It is one of three core financial statements every business needs, alongside the balance sheet and the cash flow statement, as noted by Xero.
The P&L differs from the balance sheet in one important way. A P&L shows activity over time, while a balance sheet provides a snapshot of assets, liabilities, and equity at a specific point in time, according to Bank of America. The final figure on the P&L is net income or net loss, commonly called the bottom line, as explained by Oregon SBDC.
How does a profit and loss statement work?
A profit and loss statement works through a fixed calculation sequence that moves from revenue down to net profit. Revenue minus cost of goods sold equals gross profit. Gross profit minus operating expenses equals operating income. Operating income adjusted for other income and expenses, then minus taxes, equals net profit, according to Oregon SBDC.
The top line is revenue, the total amount a business earns from selling products or services before any expenses are subtracted. The bottom line is net income, also referred to as profit or earnings, according to Investopedia. If net income is negative, it is called a net loss, meaning expenses exceeded revenue during that period, as noted by Xero.
Two accounting methods affect how a P&L is prepared. Cash accounting records revenue when cash is received and expenses when cash is paid. Accrual accounting records revenue when it is earned and expenses when they are incurred, regardless of when cash changes hands, according to Bank of America. Most small businesses prepare a profit and loss statement monthly, quarterly, or annually, as stated by Xero.
What are the main line items on a profit and loss statement?
The main line items on a profit and loss statement are revenue, cost of goods sold, gross profit, operating expenses, operating income, and net income. Revenue is the total amount earned from selling products or services before any expenses are subtracted, according to Xero. Cost of goods sold, or COGS, includes the direct costs of producing products or delivering services, such as materials, labor, shipping, and manufacturing, as explained by Oregon SBDC.
Gross profit equals total revenue minus the cost of goods sold. It measures how efficiently a business produces its product or service before overhead enters the picture. Operating expenses are the costs of running the business itself, including payroll, rent, utilities, marketing, office supplies, insurance, software subscriptions, and depreciation, according to Oregon SBDC.
Operating income measures profit after operating expenses but before taxes and certain nonoperating expenses. Additional line items may appear on a P&L, including interest, taxes, depreciation, and amortization. These items feed into EBITDA, which stands for earnings before interest, depreciation, taxes, and amortization, as defined by Harvard Business School Online. The final line is net income or net loss.
What are common mistakes business owners make when reading a P&L?
One common mistake is mixing personal and business expenses in the books. When personal spending sits inside a P&L, the statement no longer reflects the true performance of the business, and the owner loses the ability to see what is actually working, according to Oregon SBDC.
Another error is recording revenue before it is earned or misclassifying assets as operating expenses. Recording revenue too early inflates the top line and makes the business look healthier than it is. Misclassifying an asset purchase as an operating expense distorts both the current period's profit and the balance sheet.
Inconsistent expense categorization across months is a third problem. When the same type of expense lands in different categories from one month to the next, period-over-period comparisons become unreliable. The owner cannot tell whether a cost is truly rising or simply being labeled differently.
Waiting until year-end to review financial reports is a fourth mistake. A P&L reviewed only once a year hides problems until they are large. Monthly review turns the P&L into an early warning system rather than a rearview mirror, according to Oregon SBDC.
What are the red flags to look for in a profit and loss statement?
A pattern of declining gross profit margin is a red flag. Gross profit margin is gross profit divided by revenue, and a downward trend over consecutive periods signals rising product costs or weak pricing power. Either issue deserves investigation before it compounds.
Operating expenses growing faster than revenue over consecutive periods is another warning sign. If revenue grows by a few percentage points while operating expenses grow by double digits, the business is becoming less efficient. That trend, left unchecked, eventually erases the bottom line.
A healthy net profit does not guarantee cash in the bank. A business can show a profit on the P&L and still struggle to pay bills if customer invoices have not been paid or large inventory purchases have reduced available cash, according to Oregon SBDC. The P&L and the cash flow statement tell different stories.
A net loss means expenses exceeded revenue for that period, which is a signal to investigate, not panic, as noted by Xero. A single loss period may reflect a planned investment or a seasonal dip. Repeated losses are a different matter.
How can a business owner use a P&L statement to make better decisions?
A P&L statement is a tool for spotting trends, not just a record of the past. Comparing statements across periods shows where the business is heading, and income statements are often shared as quarterly and annual reports to show financial trends and comparisons over time, according to Harvard Business School Online. A business owner who reviews the P&L monthly can catch a rising cost or a softening margin early enough to act.
Spencer Accounting Group uses the P&L as the foundation for Strategic Tax Planning, Bookkeeping, and Tax Filing. The firm also helps owners get current on unfiled returns through its Back Tax Return Filing service. Clean books make the P&L a decision tool rather than a source of confusion.
Multi-state sales tax nexus can distort a P&L if sales tax liabilities are not properly accounted for. A business selling across state lines may owe tax in states where it has economic nexus, and those liabilities can sit outside the P&L until a state sends a notice. Spencer Accounting Group specializes in Sales Tax Resolution for owners selling across state lines, including nexus review, exposure quantification, voluntary disclosure, and getting current with each state.
This article is general information, not tax advice for a specific situation. Business owners with multi-state sales or overdue filings should review their position with a qualified professional.
Key Takeaways
- A profit and loss statement summarizes revenue, costs, and expenses over a set period, typically monthly, quarterly, or annually.
- The P&L calculation runs from revenue down to net income, subtracting COGS, operating expenses, other items, and taxes along the way.
- Gross profit is revenue minus the cost of goods sold, and it measures how efficiently a business produces its product or service.
- Cash accounting records transactions when money moves; accrual accounting records them when revenue is earned or expenses are incurred.
- A business can show a profit on the P&L and still struggle to pay bills if cash is tied up in inventory or unpaid invoices.
- Common bookkeeping errors include mixing personal and business expenses and failing to categorize expenses consistently.
- Reviewing the P&L monthly is a practical habit that prevents year-end surprises and supports forward-looking decisions.
References
- Profit and Loss Statement: Meaning, Importance, Types, and Examples — Investopedia
- Understanding a profit and loss (P&L) statement — Bank of America
- How to Read a Profit and Loss Statement — Oregon SBDC
- How to Read & Understand an Income Statement — Harvard Business School Online, published May 28, 2020
- What is a Profit & Loss Statement | Definition — Xero