Key takeaways
An income statement summarizes total revenue, expenses, and net income over a specific period, helping you evaluate your company’s financial performance.
The main components include revenue, COGS (cost of goods sold), gross profit, operating expenses, other income/expenses, and income tax.
Preparing an income statement requires organizing data from the adjusted trial balance and calculating subtotals to arrive at net income.
Net income reflects the core equation: revenues − expenses = net income, the essential measure of business performance and profitability.
Rho helps founders produce cleaner, faster income statements by centralizing banking, card spend, and expense data into one organized financial system.
An income statement is often the first financial report investors look at to understand your business. It shows whether your company is generating enough sales revenue to cover its costs and move toward profitability and positive cash flow. Alongside the balance sheet and cash flow statement, it is one of the most important financial statements for any small business or startup. According to the Financial Accounting Standards Board (FASB), which sets Generally Accepted Accounting Principles (GAAP) standards that govern financial reporting, the income statement is a required financial statement for U.S. public companies and other organizations that follow GAAP.
If you are new to financial accounting, learning how to prepare an income statement can feel like an "Accounting 101" crash course. Many founders search for guidance on the basics when they first start working with their books. Terms like revenue, COGS, and net income look technical, but the structure behind them is straightforward once you see how the line items fit together. Our startup accounting guide breaks down the fundamentals in plain language for growing companies.
This guide walks through what an income statement is, how it works, and why it matters for startups. In later sections, we will walk through, step by step, how an income statement is prepared so you can confidently review, question, and present your numbers.
What is an income statement?
An income statement is a financial report that summarizes a company's revenues, expenses, and profit over a specific period, such as a month, quarter, or year. It is also called a profit and loss statement (P&L). For many founders, it becomes the primary view of the company's financial performance over time.
Where the balance sheet shows what your business owns and owes—assets and liabilities, like accounts payable and accounts receivable—at a point in time, the income statement shows performance over time. It answers questions like:
How much revenue did we generate this period?
How much did it cost to deliver our product or service?
Did we earn a profit or record a loss?
At its core, the income statement follows a simple equation:
Revenues − expenses = net income
You'll also see this written as revenues - expenses = net income or net profit. Everything in the report is organized to support that relationship. When you prepare the income statement, you group and summarize all revenue and expense activity to arrive at the final number.
Main components of an income statement
Before learning how to prepare an income statement step by step, it helps to understand the core sections that appear in most startup financials. Each part plays a specific role in showing how total sales turn into net income.
Revenue
Revenue represents all income generated from your product or service during the reporting period. For SaaS companies, this may be subscription revenue; for ecommerce brands, it includes product sales and net sales after returns or discounts. This is the starting point for assessing business performance and is usually the first line item on a single-step or multi-step income statement.
Cost of goods sold (COGS)
COGS includes the direct costs required to deliver your product or service. Examples include cloud hosting tied to your app, payment processing fees, materials, or direct contractor costs. Subtracting COGS from revenue gives you gross profit, one of the most essential metrics for startup viability.
Gross profit and gross margin
Gross profit is calculated as revenue minus COGS. Gross margin expresses this figure as a percentage of revenue and shows how profitable your core offering is before overhead. Strong margins give you room to invest in growth, while weak margins signal pricing or cost issues that may demand deeper financial analysis.
Operating expenses (Opex)
Operating expenses cover the indirect costs of running your business—sales and marketing, product development, G&A, software tools, rent, and professional services. These are ongoing expenses that support growth but don't generate revenue. On a detailed statement, you might break them into administrative costs, R&D, and selling fees, and then calculate total operating expenses.
Understanding your Opex is critical to financial planning and forecasting, which helps you make smarter decisions about where to allocate resources as you scale.
Operating income
Operating income (or operating loss) reflects your profitability after subtracting operating expenses from gross profit. This number shows how efficiently the business runs day to day. Some companies also track earnings before interest or EBIT at this stage to isolate core operations.
Other income and expenses
This category includes non-operating items such as interest income, interest expense on loans, foreign exchange gains or losses, or one-time charges. These non-operating expenses sit outside core operations but still affect your final profit or loss and pre-tax income.
Income tax expense
If the business is profitable, income tax expense is recorded here. Early-stage startups often show little or no current tax, but the line item still appears on GAAP-prepared financial statements and affects retained earnings.
Net income
Net income is the final result: total revenue minus all expenses. A positive number reflects profit, while a negative one indicates a net loss. This is the "bottom line" investors and stakeholders look to for understanding overall performance and the company's financial health. Over time, net income is recorded in retained earnings on the balance sheet.
How to prepare an income statement step by step
Preparing an income statement involves organizing financial activity from your accounting records into the structure outlined above. For founders, the workflow is straightforward once you know what to pull and where it goes. This is the trial balance for the income statement process.
Step 1. Start with your trial balance
Begin with your adjusted trial balance, which lists all account balances after recording accruals, reconciliations, debits and credits, depreciation, amortization, and other adjusting entries. The adjusted trial balance shows whether total debits equal total credits and ensures your revenue and expense numbers are complete and accurate for the period.
Step 2. Identify and total your revenue accounts
Locate all revenue-related accounts in the trial balance, such as subscription revenue, product sales, or service income, and total them. This figure becomes the first line of your income statement.
This data typically comes from your general ledger in your accounting software. For early-stage teams, good bookkeeping makes everything else easier.
Step 3. Pull and sum your COGS accounts
Next, identify direct costs associated with delivering your product or service. Sum these accounts to calculate total COGS. Subtracting COGS from revenue gives you gross profit, a key indicator of financial health.
Step 4. Group your operating expenses
Collect all operating expenses, such as payroll, marketing, software tools, rent, and administrative costs. Group them into categories like Sales and Marketing, Research and Development, and General and Administrative to keep the report organized. Add these together to determine total operating expenses.
Step 5. Calculate operating income
Subtract total operating expenses from gross profit. The result is your operating income (or operating loss), which shows whether your core business is financially sustainable before considering non-operating items.
Step 6. Add other income or expenses
Incorporate any non-operating activity, including interest income, interest expense, foreign exchange impacts, or one-time charges. Combine these with operating income to arrive at income before tax.
Step 7. Subtract income taxes to determine net income
Finally, subtract the applicable income tax expense to calculate net income. If expenses exceed revenue, you will report a net loss. This is the bottom line used by investors, lenders, and leadership teams to assess overall performance.
Why income statements is essential for startups
For early-stage companies, the income statement is more than a compliance requirement. It shows how efficiently the business turns revenue into profit and how that performance changes over time. A clear income statement helps founders and finance leaders:
Monitor revenue vs expenses: Understand whether revenue growth is keeping pace with operating costs, helping you spot overspending early and maintain healthy unit economics as you scale. This also ties directly to your cash flow analysis, which reveals where cash actually moves in and out of your business.
Understand margin performance: Track changes in gross margin and operating margin to evaluate product profitability, operational efficiency, and the impact of new pricing or cost-control decisions.
Compare results to plan: Measure actual performance against your budget or financial forecast to adjust spending, refine projections, and stay aligned with your financial roadmap. Financial forecasting tools help you turn historical income statement data into forward-looking projections.
Communicate financial health: Present clear, credible results to investors, lenders, and your board, giving stakeholders confidence in your reporting and strengthening your case during fundraising or planning cycles.
Make informed operational decisions: Use accurate revenue and expense data to guide hiring plans, pricing adjustments, marketing spend, and other choices that directly affect your burn rate and growth trajectory.
The income statement is one of the essential reports for evaluating financial health. When you understand how to prepare and interpret it, stakeholder conversations become more strategic and less about troubleshooting numbers.
Simplify preparing income statements with Rho
Preparing an income statement becomes much easier when your financial data is organized, accurate, and centralized. Rho gives startups a single platform for banking, corporate cards, and expense management, so every transaction is categorized correctly from the start. With Rho's automated expense tracking, your finance team no longer needs to chase receipts or manually categorize spending—it all flows directly into your accounting software.
Real-time controls, automated workflows, and streamlined reconciliations help finance teams close the books faster and produce cleaner income statements without manual cleanup. Rho integrates with popular accounting software, ensuring that banking data, card spend, and invoices automatically sync to generate accurate financial statements.
Our automated accounts payable solution eliminates invoice chaos and payment delays, giving you complete visibility into expenses as they happen. Combined with real-time treasury management and automated bill pay, Rho handles the operational busywork so your team can focus on strategy.
With Rho, you spend less time fixing spreadsheets and more time understanding performance and planning your next move. Plus, when it's time to prepare for audits or investor due diligence, clean data and organized records make the process seamless.
Get started with Rho and bring clarity, efficiency, and control to your financial reporting.
Frequently Asked Questions
What is an income statement?
An income statement is a financial report that summarizes your company’s revenues, expenses, and net income over a specific period. It shows whether the business generated a profit or loss and helps founders understand performance, margins, and spending trends. Income statements are required under Generally Accepted Accounting Principles (GAAP) and are essential for audits, investor presentations, and compliance.
How do you prepare an income statement step by step?
You prepare an income statement by starting with the adjusted trial balance, totaling revenue accounts, calculating cost of goods sold, grouping operating expenses, and then computing operating income. After adding non-operating items and subtracting income taxes, you arrive at net income for the period. For detailed guidance on each step, see our 3-statement financial model guide.
What are the main components of an income statement?
The main components include revenue, cost of goods sold, gross profit, operating expenses, operating income, other income and expenses, income tax expense, and net income. Together, these sections show how the business moves from revenue to final profit or loss.
How do you calculate net income?
Net income is calculated using the basic formula: Revenues − Expenses = Net Income
How is an income statement different from a balance sheet?
An income statement shows performance over a period, while a balance sheet shows what the company owns and owes at a single point in time. The income statement tells you whether you're generating profit; the balance sheet tells you about liquidity, assets, and obligations. Together with a cash flow statement, these three statements form the core of financial reporting.