How to Prepare an Income Statement Step by Step: Revenue, Expenses, and Net Income Explained

The income statement (also called the profit and loss statement or P&L) answers one question: did the company make money during this period? It reports all revenues earned and all expenses incurred during a specific time period (month, quarter, or year), and the difference is net income (profit) or net loss. The multi-step format — which is what professors test and what real companies use — breaks this into layers: 1. Net Sales Revenue (total sales minus returns and discounts) 2. − Cost of Goods Sold (COGS) = the direct cost of producing or purchasing what was sold 3. = Gross Profit (revenue minus COGS — how much you made on the product itself) 4. − Operating Expenses (selling expenses + administrative expenses) 5. = Operating Income (profit from core business operations) 6. ± Other Revenues and Expenses (interest, gains/losses on asset sales) 7. = Income Before Tax 8. − Income Tax Expense 9. = Net Income Each layer tells you something different. Gross profit tells you about pricing and production efficiency. Operating income tells you about operational efficiency. Net income is the bottom line — what is left for shareholders. AccountingIQ builds income statements from trial balance data — snap a photo of the adjusted trial balance and it classifies each account, places it in the correct line on the statement, and calculates every subtotal through net income.

Revenue accounts: Sales Revenue (or Service Revenue for service businesses) is always the top line. Subtract Sales Returns and Allowances and Sales Discounts to get Net Sales Revenue. Interest Revenue, Gain on Sale of Assets, and Rent Revenue (if not your core business) go in the Other Revenues section below operating income. Cost of Goods Sold: for a merchandising company, COGS = Beginning Inventory + Purchases − Ending Inventory. For a manufacturing company, COGS includes raw materials, direct labor, and manufacturing overhead. COGS is reported immediately below revenue because it represents the direct cost of what was sold. A company with $500,000 in revenue and $300,000 in COGS has a 40% gross margin — meaning 40 cents of every sales dollar is available to cover operating expenses and profit. Operating expenses are split into two categories: Selling Expenses (advertising, sales salaries, sales commissions, delivery expense, store rent — anything related to selling the product) and General & Administrative Expenses (office salaries, office rent, depreciation, utilities, insurance, office supplies — the overhead of running the business). This split helps analysts understand where the company is spending. Other (non-operating) items: Interest Expense (the cost of borrowing — not an operating expense because it is a financing decision, not an operational one), Interest Revenue (earnings on investments), Gains and Losses on asset sales (selling equipment for more or less than book value), and any other items not related to core operations. Income Tax Expense is reported last, before Net Income. For a corporation, this is the tax on pre-tax income. For a sole proprietorship or partnership, there is no income tax line on the business income statement because the tax is paid personally by the owner(s).

Adjusted trial balance for XYZ Company, year ended December 31: Revenue accounts: Sales Revenue $420,000. Sales Returns $12,000. Sales Discounts $8,000. Interest Revenue $3,000. Gain on Sale of Equipment $5,000. Expense accounts: Cost of Goods Sold $240,000. Sales Salaries Expense $45,000. Advertising Expense $18,000. Delivery Expense $7,000. Office Salaries Expense $52,000. Rent Expense $36,000. Depreciation Expense $15,000. Utilities Expense $9,000. Insurance Expense $6,000. Interest Expense $4,000. Income Tax Expense $22,200. Income Statement — XYZ Company — Year Ended December 31: Net Sales Revenue: $420,000 − $12,000 − $8,000 = $400,000 Cost of Goods Sold: ($240,000) Gross Profit: $160,000 Operating Expenses: Selling Expenses: Sales Salaries: $45,000 Advertising: $18,000 Delivery: $7,000 Total Selling: ($70,000) General & Administrative: Office Salaries: $52,000 Rent: $36,000 Depreciation: $15,000 Utilities: $9,000 Insurance: $6,000 Total G&A: ($118,000) Total Operating Expenses: ($188,000) Operating Loss: ($28,000) — yes, this company lost money on operations Other Revenues and Expenses: Interest Revenue: $3,000 Gain on Sale of Equipment: $5,000 Interest Expense: ($4,000) Net Other: $4,000 Income (Loss) Before Tax: ($24,000) Income Tax Expense: This would typically be $0 or a tax benefit with a loss. But let's say the company had taxable income from other adjustments: ($22,200) Net Loss: ($46,200) Wait — that does not make sense with a pre-tax loss. Let me adjust the example so the company is profitable: Change Sales Revenue to $620,000. Revised: Net Sales = $620,000 − $12,000 − $8,000 = $600,000. COGS = $240,000. Gross Profit = $360,000. Operating Expenses = $188,000. Operating Income = $172,000. Other net = $4,000. Pre-tax = $176,000. Tax (at ~25%): $44,000. Net Income = $132,000. The $132,000 net income closes to Retained Earnings on the balance sheet at year-end — this is how the income statement connects to the balance sheet. If the company pays $50,000 in dividends, retained earnings increases by $82,000 ($132,000 − $50,000). AccountingIQ prepares multi-step income statements from any trial balance data — snap a photo and it classifies every account, builds the statement with proper subtotals, and explains each line.

Mistake 1: putting Interest Expense in operating expenses. Interest is a financing cost, not an operating cost. It goes in the Other Revenues and Expenses section below operating income. This distinction matters because operating income (also called EBIT — earnings before interest and taxes) measures operational performance independent of how the company is financed. Two identical companies with different debt levels have different interest expenses but the same operating income. Mistake 2: forgetting to subtract Sales Returns and Discounts from Sales Revenue. The top line should be Net Sales, not gross Sales Revenue. If the adjusted trial balance shows Sales Revenue $500,000, Sales Returns $15,000, and Sales Discounts $10,000, the income statement starts at $475,000 — not $500,000. Mistake 3: including dividends on the income statement. Dividends are NOT an expense — they are a distribution of profits to shareholders. Dividends reduce Retained Earnings directly on the Statement of Retained Earnings (or the balance sheet). They never appear on the income statement. This is one of the most commonly tested misconceptions. Mistake 4: confusing a single-step and multi-step income statement. The single-step format just lists all revenues, subtracts all expenses, and shows net income — no subtotals for gross profit or operating income. The multi-step format (described above) provides the subtotals. Exams usually specify which format to use. If not specified, use multi-step — it demonstrates more knowledge. Mistake 5: not matching the time period. The income statement covers a period (January 1 – December 31, 2025), not a point in time. The header must state the period. The balance sheet, by contrast, is a snapshot at a point in time (as of December 31, 2025). Mixing up the headers is a presentation error that costs points.