Business Concepts
Net Income Formula (2026): Full Calculation Guide
The net income formula subtracts costs, interest, and taxes from revenue to show true profit. See examples and how it compares to working capital.
The net income formula strips away every cost, tax, and expense until one number is left: what a business, or a person, actually keeps. Get it wrong and every ratio built on top of it, from margins to valuation, is wrong too.
Quick answer
Net Income = Total Revenue - Cost of Goods Sold - Operating Expenses - Interest - Taxes. It's the final line on the income statement, often called the "bottom line," and it feeds retained earnings, earnings per share, and most profitability ratios.
Key takeaways
- Net income = Revenue minus every expense category, including interest and taxes, not just cost of goods sold.
- It's different from gross profit and operating income, which stop before certain deductions are applied.
- REITs like Realty Income report net income separately from funds from operations (FFO), and the two can diverge sharply.
- Income-driven repayment plans use your discretionary income, not your gross salary, as the base for the payment calculation.
- Rising net income alongside a shrinking working capital formula result is an early warning sign, not a good one.
What Is Net Income Formula?
The net income formula is Net Income = Total Revenue - Total Expenses. Expenses here mean cost of goods sold, operating costs, interest on debt, depreciation, and taxes. Whatever survives that subtraction is the real profit, the figure this business concepts guide treats as more trustworthy than any headline revenue number.
Net income also underpins residual income, a related but stricter metric. Residual income measures what's left after a company also covers its cost of capital, the minimum return investors expect. A business can post healthy net income and still show negative residual income if it never clears that bar.
The profit formula concept works the same way at every level of a business: strip out costs layer by layer, and whatever survives at the very end is the number that matters for taxes, dividends, and reinvestment decisions.
Net Income Formula Explained
Break the formula into its layers and it reads like a waterfall. Start with revenue, subtract cost of goods sold to get gross profit, subtract operating expenses to get operating income, then subtract interest and taxes to land on net income.
Don't confuse net income with fixed income. Net income is a profitability result on the income statement. Fixed income is an asset class, bonds and similar securities that pay a set interest rate over time. A company's net income can fund a fixed income portfolio, but the two terms describe entirely different things.
Net income also sits downstream from the break-even formula: break-even units = fixed costs / (price per unit - variable cost per unit). Hitting break-even means revenue finally covers costs, but net income only turns positive once volume climbs further past that point and clears interest and taxes too.
Net income alone doesn't tell you if a company can pay its bills next month. Pair it with the working capital formula, current assets minus current liabilities, to check whether paper profit matches actual cash on hand. A current ratio below 1.0 signals negative working capital, a red flag lenders check before extending credit.
A firm can report solid net income while working capital turns negative if unpaid invoices pile up faster than cash comes in the door. That gap is exactly why credit analysts never look at net income in isolation.
| Metric | Formula | What it excludes | Best used for |
|---|---|---|---|
| Gross profit | Revenue - COGS | Operating expenses, interest, taxes | Production efficiency |
| Operating income | Gross profit - operating expenses | Interest, taxes | Core business performance |
| Net income | Operating income - interest - taxes | Nothing, it's the bottom line | Overall profitability, EPS |
| Residual income | Net income - (cost of capital x equity) | Nothing, but adds a capital charge | Value creation above investor expectations |
Net Income Formula Examples
Say a small consulting firm brings in $500,000 in revenue. Cost of services runs $180,000, operating expenses $120,000, interest $10,000, and taxes $47,000. Net income = $500,000 - $180,000 - $120,000 - $10,000 - $47,000 = $143,000.
Take a smaller product line: a $50 item with $30 variable cost and $40,000 in fixed costs. The break even formula gives 40,000 / (50 - 30) = 2,000 units. Selling 2,050 units clears break-even, but net income still depends on interest and taxes eating into that thin margin above the line.
Real estate investment trusts complicate the picture. Realty Income Corporation, nicknamed "The Monthly Dividend Company," has been a constituent of the S&P 500 since November 2023. It discloses GAAP net income in every 10-K, but real estate depreciation and straight-line rent adjustments mean net income can look very different from the funds-from-operations figure REIT investors actually watch.
That gap is why REIT analysts almost never value a property company on net income alone. Companies weighing the benefits and risks of innovation face a similar tradeoff, accepting a lower short-term net income figure to fund R&D that a pure bottom-line reading would flag as a problem.
How to Apply Net Income Formula
Start with your income statement or pay stub. Total every dollar that comes in, then subtract cost of goods sold or, for individuals, nothing comparable applies yet.
Next subtract operating expenses: rent, salaries, utilities, marketing. Then subtract interest on any debt and finally taxes owed. What's left is net income, whether you're a Fortune 500 company or a freelancer filing a Schedule C.
IRS Schedule C instructions for Form 1040 require sole proprietors to report net profit, not gross receipts, on line 31, according to IRS.gov, because gross receipts alone overstate taxable income.
The same logic applies to an income driven repayment plan for federal student loans. Federal Student Aid bases income-driven repayment plan payments on discretionary income, adjusted gross income minus a poverty-guideline exemption, not gross salary, according to StudentAid.gov.
That distinction trips people up constantly. A borrower earning a high gross salary but carrying heavy pre-tax deductions can have a lower discretionary income, and therefore a lower IDR payment, than their paycheck suggests.
Before you sign off on any net income figure, run one more check against liquidity. Teams that ignore this step often show up later in guides on signs you're being set up to fail at work, chasing a profit target while the cash position quietly deteriorates underneath them.
Net income tells you if you made money. Working capital tells you if you can still pay rent next month. Never trust one without checking the other.
Net Income Formula - FAQ
What's the difference between the income statement and balance sheet?
The income statement shows net income over a period, revenue minus expenses. The balance sheet shows what a company owns and owes at a single point in time, including the working capital position that net income alone won't reveal.
Is net income the same as cash flow?
No. Net income includes non-cash items like depreciation and can be affected by unpaid invoices, so a company can report positive net income while actual cash flow is negative.
Why do REITs report net income and FFO separately?
Real estate depreciation distorts net income for property companies, so REITs add back depreciation and adjust for property sales to calculate funds from operations, a cleaner measure of cash-generating ability.