Net income in business is what remains after you subtract every expense — cost of goods, operating costs, depreciation, interest, and taxes — from total revenue for a given period. A positive number is profit; a negative number is a net loss. It’s the figure that tells you whether the business actually made money, and it drives tax bills, loan terms, and most of the financial decisions that follow.
How to Calculate Net Income
The formula is simple. Total Revenue − COGS − Operating Expenses − Depreciation and Amortization − Interest − Taxes = Net Income. The work is in knowing what belongs in each bucket.
- Total revenue is all money brought in from sales of goods or services before any deductions.
- Cost of goods sold covers the direct costs of producing what you sell, such as raw materials and production labor. Revenue minus COGS gives you gross profit.
- Operating expenses are the indirect costs of running the business: rent, utilities, payroll, marketing, office supplies. The Internal Revenue Code allows deduction of ordinary and necessary expenses of carrying on a trade or business, including reasonable compensation, travel, and rent.1Office of the Law Revision Counsel. 26 USC 162 – Trade or Business Expenses
- Depreciation and amortization spread the cost of physical and intangible assets over their useful lives. They reduce net income on paper even though no cash leaves the business that period.
- Interest expense is what you pay on business loans or lines of credit.
- Income taxes are the federal and state taxes owed on the period’s earnings.
If the result comes out positive, you have net income. If it comes out negative, you have a net loss.
Why Net Income Isn’t the Same as Cash in the Bank
A profitable income statement doesn’t guarantee cash on hand. Net income follows accrual accounting: revenue counts when it’s earned and expenses count when they’re incurred, regardless of when money actually moves. A large invoice booked in March but paid in June shows up as March revenue while your bank balance sits unchanged.
Non-cash expenses widen the gap. Depreciation reduces net income without any check being written, which is why the cash flow statement adds depreciation back when calculating cash generated. A business can report solid net income while running short on cash if customers pay slowly, and a business can report modest net income while sitting on plenty of cash if it has large depreciation write-offs. Both numbers matter.
Net Income vs. EBITDA
EBITDA is earnings before interest, taxes, depreciation, and amortization. Where net income accounts for every expense, EBITDA strips out financing choices, tax exposure, and accounting conventions to isolate what the core operations earn. EBITDA is almost always higher than net income for the same period.
Investors and lenders reach for EBITDA when comparing companies with different capital structures or tax situations. Net income reflects what the business actually kept after every real obligation. The two answer different questions, and neither replaces the other.
What a Positive Net Income Means for the Business
Profit typically lands on the balance sheet as retained earnings, the accumulated profit that hasn’t been paid out to owners. Retained earnings can fund expansion, pay down debt, or be distributed as dividends.
Consistent profitability does more than build the balance sheet. Lenders see less risk and offer better terms. Investors pay attention. And a cushion of profit absorbs the quarters when revenue drops or costs spike. One good quarter proves little; a steady pattern of positive net income is the clearest sign that the business model works.
What a Net Loss Means
A net loss means expenses ran ahead of revenue for the period. One weak quarter isn’t necessarily fatal, particularly for startups spending heavily on growth, but repeated losses erode equity, drain reserves, and eventually force decisions about borrowing, cutting costs, or shutting down. Losses also come with their own tax rules, some of which help and some of which limit what you can do with the red ink.
Net Operating Loss Carryforward
If your deductions exceed your income for the year, you may have a net operating loss that carries forward to reduce taxable income in future years.2Internal Revenue Service. Instructions for Form 172 – Net Operating Losses for Individuals, Estates, and Trusts There is no time limit; an unused NOL rolls forward indefinitely. But the deduction in any future year is capped at 80% of that year’s taxable income calculated without the NOL. A large loss can take several profitable years to absorb.
Excess Business Loss Limitation
Before you get to the NOL rules, there’s a ceiling on how much business loss you can deduct against other income like wages or investment returns in a single year. For 2026, the limit is $256,000 for single filers and $512,000 for joint returns.3Legal Information Institute. 26 USC 461(l)(3) – Excess Business Loss Any business loss above that threshold becomes an NOL carried forward to the following year rather than a current deduction.
Passive Activity Loss Rules
Losses from a business you don’t actively run face an extra restriction. If you hold an interest but don’t materially participate (generally fewer than 500 hours per year), the IRS treats your losses as passive. Passive losses only offset passive income; they can’t reduce wages, salary, or portfolio income.4Internal Revenue Service. Publication 925 – Passive Activity and At-Risk Rules
Rental real estate has a limited exception. If you actively participate in managing the property, you can deduct up to $25,000 of rental losses against non-passive income. That allowance phases out once your modified adjusted gross income exceeds $100,000 and disappears entirely at $150,000.4Internal Revenue Service. Publication 925 – Passive Activity and At-Risk Rules Losses you can’t use in the current year carry forward until you either generate passive income or dispose of the activity.
Taxes Triggered by Net Income
Self-Employment Tax
If you’re a sole proprietor, independent contractor, or partner, net earnings of $400 or more trigger self-employment tax. The rate is 15.3%: 12.4% for Social Security and 2.9% for Medicare.5Internal Revenue Service. Self-Employment Tax – Social Security and Medicare Taxes The Social Security portion applies only to earnings up to $184,500 in 2026.6Social Security Administration. Benefits Planner – Social Security Tax Limits on Your Earnings Medicare tax has no cap. Earnings above $200,000 ($250,000 for joint filers) also face an additional 0.9% Medicare surtax. S corporation income passed through to shareholders is not subject to self-employment tax, which is one reason the structure appeals to profitable owner-operators.
Estimated Tax Payments
If you don’t have enough tax withheld from a paycheck, you generally have to make quarterly estimated payments when you expect to owe $1,000 or more at filing.7Internal Revenue Service. Estimated Taxes Payments are due in April, June, September, and January of the following year. Missing a deadline triggers an underpayment penalty even if you pay the full balance when you file. You can generally avoid the penalty by paying at least 90% of the current year’s tax or 100% of the prior year’s tax, whichever is smaller.
Qualified Business Income Deduction
Pass-through businesses (sole proprietorships, partnerships, S corporations) may qualify to deduct up to 20% of qualified business income under Section 199A.8Office of the Law Revision Counsel. 26 USC 199A – Qualified Business Income For 2026, the deduction begins to phase out for taxable income above $201,750 for single filers and $403,500 for joint filers. Above those thresholds, the deduction may be limited by the wages the business pays and the value of its qualified property. Specified service businesses like law, medicine, and consulting face tighter phase-out rules.
Where Net Income Gets Reported
Internally, net income shows up on the income statement (also called the profit and loss statement), which summarizes revenue, expenses, and the resulting profit for a specific period. That figure flows into the balance sheet through retained earnings. The IRS form you use to report it depends on how the business is organized.
Sole Proprietors
Sole proprietors report income or loss on Schedule C attached to Form 1040.9Internal Revenue Service. About Schedule C (Form 1040) – Profit or Loss from Business (Sole Proprietorship) Net profit from Schedule C flows onto the 1040 and directly affects adjusted gross income and total tax owed.
Partnerships and S Corporations
Partnerships file Form 1065 and issue each partner a Schedule K-1 showing their share of income, deductions, and credits.10Internal Revenue Service. About Form 1065 – U.S. Return of Partnership Income The partnership itself pays no income tax; the numbers pass through to the partners’ individual returns. S corporations work the same way, filing Form 1120-S and issuing K-1s to shareholders.
Public Companies
Publicly traded corporations file annual reports on Form 10-K and quarterly reports on Form 10-Q with the Securities and Exchange Commission. Those filings include audited financial statements with net income prominently reported.11U.S. Securities and Exchange Commission. Exchange Act Reporting and Registration