What Is a P&L Statement? Understanding Your Startup's Profitability

There's a peculiar injustice in business: you can sell more products, attract more customers, work longer hours, and somehow end up making less money.

It seems almost unreasonable. After all, isn't growing revenue supposed to be a good thing?

Usually, yes. But revenue is only part of the equation. What matters is how much of that money remains after accounting for everything it costs to generate it. A company can double its sales while watching its profits shrink, particularly when the costs of acquiring customers, delivering services, or operating the business grow even faster.

Fortunately, there's a financial statement designed to explain exactly what's happening. It's called the profit and loss statement, or P&L, and understanding how to read one can tell you considerably more about your startup's performance than revenue figures alone.

What Is a P&L Statement?

A profit and loss statement summarizes a company's revenue, costs, and expenses over a defined period, typically a month, quarter, or year. Also called an income statement, it shows whether the business earned a profit or incurred a loss.

The basic equation is straightforward:

Revenue − Expenses = Net Income (or Loss)

Unlike a balance sheet, which shows a company's financial position on a particular date, a P&L measures performance over time. It allows founders to evaluate profitability, compare reporting periods, and identify changes that might otherwise go unnoticed.

The U.S. Securities and Exchange Commission's guide to income statements provides an overview of the report's components.

Understanding the Sections of a P&L

A typical P&L starts with revenue and progressively subtracts costs and expenses until it reaches net income or loss. Each stage reveals something different about how the company operates.

Revenue: The Top Line

Revenue represents the value of products sold or services provided during the reporting period, subject to applicable accounting rules. It's called the top line because it appears near the beginning of the statement.

For a SaaS company, revenue generally comes from subscriptions and services. A consumer products business might generate revenue through wholesale orders and direct-to-consumer sales.

Under accrual accounting, revenue isn't necessarily recognized when customers pay. A SaaS company receiving $12,000 upfront for a year of service would generally recognize $1,000 in revenue each month as it delivers that service.

The P&L measures financial performance, not simply money moving through bank accounts.

Cost of Goods Sold: What It Costs to Deliver

Cost of goods sold (COGS), sometimes called cost of revenue for service businesses, represents the direct costs associated with providing products or services.

For a manufacturer, these may include materials, production labor, and manufacturing overhead. For a SaaS business, costs of revenue may include hosting, infrastructure, and personnel directly involved in delivering the service, depending on its accounting policies.

Separating direct costs from other expenses helps founders evaluate their underlying product or service economics.

Gross Profit: What's Left After Direct Costs

Subtracting COGS from revenue produces gross profit:

Gross Profit = Revenue − Cost of Goods Sold

Suppose your company generates $200,000 in monthly revenue and incurs $70,000 in direct costs. Gross profit is $130,000, representing a 65% gross margin.

Gross margin is useful when evaluating pricing and comparing periods. If revenue increases while gross margin declines, the company may be selling more but retaining less from each dollar of sales.

Possible causes include supplier price increases, higher delivery costs, discounting, or changes in the products customers purchase.

Operating Expenses: The Cost of Running the Business

After gross profit come operating expenses, often grouped under selling, general, and administrative expenses (SG&A) and other operating categories.

These may include marketing, sales, administrative salaries, professional services, and research and development. Depreciation and amortization may also appear among operating expenses.

A startup investing heavily in sales or product development may report substantial operating expenses despite healthy gross margins. That isn't necessarily poor management, but founders should understand whether those investments are producing the expected results.

Operating Income and Net Income

Subtracting operating expenses from gross profit produces operating income or loss, reflecting profitability from the company's primary business activities.

Other items, including interest expense, nonoperating income, and income taxes, are then accounted for to arrive at net income or net loss, commonly called the bottom line.

A company can report a net loss while investing deliberately in growth, or show a profit despite declining margins. The bottom line matters, but it rarely tells the whole story.

How to Read a P&L: A Practical Example

Consider a fictional startup reporting the following results for September.

The company generated $200,000 in revenue and retained $22,000 in profit, producing an 11% net profit margin.

At first glance, that seems encouraging. But suppose the previous month produced $180,000 in revenue and $27,000 in net income.

Sales increased by more than 11%, yet profit fell by roughly 19%.

Something changed. Perhaps advertising spending increased, customers received larger discounts, or service delivery became more expensive. The P&L doesn't necessarily explain every cause, but it shows where to investigate.

That's where financial reporting becomes useful: not simply confirming whether the company made money, but revealing how its performance is changing.

Three P&L Metrics Founders Should Watch

You don't need to examine every account with equal intensity. Three profitability measures deserve particular attention.

Gross profit margin measures the percentage of revenue remaining after direct costs:

Gross Profit Margin = Gross Profit ÷ Revenue × 100

Declining gross margins can indicate pricing pressure, rising delivery costs, or a changing sales mix.

Operating profit margin measures the percentage remaining after direct costs and operating expenses:

Operating Profit Margin = Operating Income ÷ Revenue × 100

For startups investing in growth, the trend may matter more than the current figure. Leadership should understand whether increased spending is producing corresponding improvements in performance.

Net profit margin measures the percentage of revenue remaining after all expenses:

Net Profit Margin = Net Income ÷ Revenue × 100

Net margin provides a broad view of profitability, although unusual or nonrecurring items can affect the result. Significant changes deserve investigation rather than automatic celebration or concern.

Why Revenue Growth Doesn't Always Mean Profit Growth

Return to our opening puzzle: more customers, more sales, less profit.

Imagine a company that increases monthly revenue from $100,000 to $150,000 through discounts and aggressive advertising. Revenue grows 50%, which looks terrific in a sales presentation.

But if direct costs and operating expenses rise even faster, the company may earn less than before the expansion.

Comparing revenue growth with changes in gross margin and operating expenses helps founders determine whether additional sales are improving the business's economics.

It also distinguishes temporary investments from persistent problems. Higher marketing expenses during a planned launch may be reasonable. Rising costs without corresponding results deserve closer examination.

A Profitable P&L Doesn't Guarantee Healthy Cash Flow

One important limitation of a P&L is that profit and cash aren't interchangeable.

Under accrual accounting, a company can recognize revenue before collecting payment. Expenses may also be recognized in periods different from when cash changes hands.

Consequently, a profitable business can struggle to pay its bills if customers are slow to pay or substantial cash is committed elsewhere. Likewise, money raised from investors increases cash without appearing as revenue on the P&L.

Founders should review the P&L alongside the balance sheet and cash flow statement. Together, these reports explain financial performance, financial position, and the movement of cash.

How to Make Your P&L More Useful

A P&L becomes more valuable when reviewed consistently and compared against meaningful benchmarks.

Start with monthly reporting, comparing actual results with your budget, forecast, and previous periods. Look beyond total revenue and net income to identify accounts responsible for significant changes.

Are direct costs rising faster than sales? Has marketing spending increased without the expected revenue contribution? Are operating expenses growing at a sustainable pace?

Accurate categorization matters, too. If expenses are inconsistently assigned between COGS and operating expenses, gross margin comparisons become misleading even when net income remains unchanged.

A reliable month-end close process helps ensure transactions are recorded, reconciled, and reviewed before leadership relies on the results.

The U.S. Small Business Administration's business planning guidance also emphasizes income statements and financial projections when planning growth or seeking financing.

Graphite Financial's accounting and bookkeeping services help startups maintain accurate records and produce financial reporting that supports informed decisions.

Ultimately, the purpose of a P&L isn't to celebrate a profitable month or despair over an unprofitable one. It's to understand what's producing those results—and what you can do about them.

Frequently Asked Questions

What does P&L stand for?

P&L stands for profit and loss. A P&L statement, also called an income statement, reports a company's revenue, costs, expenses, and resulting profit or loss over a specified period.

Is a P&L the same as an income statement?

Yes. The terms generally refer to the same financial statement. Businesses may use different labels or formats, but the underlying purpose is to measure financial performance over time.

How often should a startup review its P&L?

Monthly reviews are generally appropriate for growing startups. They help founders identify changing costs, compare performance with forecasts, and address problems early.

Can a startup have revenue but no profit?

Absolutely. A company may generate substantial revenue while its direct costs and operating expenses exceed what it earns. Revenue growth alone doesn't guarantee profitability.

Does a P&L show how much cash a business has?

No. A P&L measures revenue and expenses over a period, not available cash. The balance sheet and cash flow statement provide additional information needed to evaluate liquidity.