Yes, corporations pay taxes. C-corporations pay a flat 21% federal income tax on their profits, and most also owe state corporate taxes, employment taxes on their payroll, property taxes on what they own, and in some industries excise taxes on what they sell. S-corporations and most LLCs are structured differently: the business itself pays no federal income tax, and the owners pay tax on the profits through their personal returns instead. So the real question is not whether corporations pay taxes but which taxes, at what rate, and who ultimately writes the check.
The Federal Corporate Income Tax
Every domestic C-corporation, and every foreign corporation earning income from U.S. business activities, pays federal income tax at a flat 21% rate on taxable income.1Office of the Law Revision Counsel. 26 USC 11 – Tax Imposed That single rate replaced a graduated structure that used to run from 15% up to 35%, and it took effect for tax years beginning after December 31, 2017.
Corporations report the numbers on Form 1120, which is due by the 15th day of the fourth month after the tax year ends — April 15 for a calendar-year company.2Internal Revenue Service. Instructions for Form 1120 (2025) A corporation that expects to owe $500 or more for the year has to make quarterly estimated tax payments along the way; missing them triggers an underpayment penalty even if the annual return eventually pays in full.3Internal Revenue Service. Underpayment of Estimated Tax by Corporations Penalty
The 21% rate is the statutory number. What most corporations actually pay, as a percentage of their profits, comes in lower once deductions and credits are applied.
Why C-Corporation Profits Get Taxed Twice
The defining feature of C-corporation taxation is that the same dollar of profit is taxed at two levels. The corporation pays 21% on its taxable income, and then when the after-tax profit is distributed to shareholders as dividends, the shareholders pay tax on those dividends on their personal returns.1Office of the Law Revision Counsel. 26 USC 11 – Tax Imposed This is the “double taxation” that people mean when they criticize the corporate tax.
Qualified dividends paid to individuals are taxed at capital-gains rates of 0%, 15%, or 20% depending on the shareholder’s total income, and high earners may also owe the 3.8% net investment income tax. Run the math at the top end: a corporation earns $100, pays $21 in corporate tax, distributes $79, and the shareholder pays roughly $16 on that. About $63 of the original $100 in profit survives both layers.
The tax code softens this only when one corporation owns stock in another. A corporate shareholder owning less than 20% of the paying company can deduct 50% of the dividends received; owning 20% or more raises the deduction to 65%; and members of an affiliated group holding 80% or more can generally deduct 100%, which prevents dividends from being taxed a third time as they move within a corporate family.4Office of the Law Revision Counsel. 26 USC 243 – Dividends Received by Corporations
S-Corporations and LLCs Don’t Pay Entity-Level Income Tax
Not every business set up as a corporation pays corporate income tax. S-corporations and most LLCs are pass-through entities: the business itself owes no federal income tax, and each owner reports a share of the profits on their personal return.5Office of the Law Revision Counsel. 26 USC Subtitle A, Chapter 1, Subchapter S – Tax Treatment of S Corporations and Their Shareholders That structure eliminates double taxation. The profit is taxed once, at each owner’s individual rate, which for 2026 runs from 10% to 37%.6Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026
An S-corporation still files an annual information return on Form 1120-S and issues each shareholder a Schedule K-1 showing their share of income, deductions, and credits.7Internal Revenue Service. Instructions for Form 1120-S (2025) The filing is real; the tax bill just lands on the owners.
S-corporation status has to be elected by filing Form 2553, and the corporation has to meet strict requirements: no more than 100 shareholders, all of whom must be U.S. citizens or residents, and only one class of stock.8Office of the Law Revision Counsel. 26 USC 1361 – S Corporation Defined A company that outgrows those limits — by taking foreign investors, for example, or issuing preferred stock — loses the election and becomes a C-corporation for tax purposes.
Pass-through owners also get the qualified business income deduction under Section 199A, which lets eligible taxpayers deduct up to 20% of their qualified business income from a domestic pass-through entity.9Internal Revenue Service. Qualified Business Income Deduction The One Big, Beautiful Bill Act made the deduction permanent. It phases out at higher incomes and has restrictions for service businesses such as law, accounting, and consulting firms. Where it applies, it effectively drops the top marginal rate on pass-through income from 37% to about 29.6%. Income from a C-corporation and wages earned as an employee don’t qualify.
State and Local Corporate Taxes
Federal tax is only part of the picture. Most states levy their own corporate income tax, with top marginal rates running from around 2.5% to 11.5%. A handful of states impose no corporate income tax at all, and several of those instead charge a gross receipts tax calculated on total revenue rather than net profit — a meaningful difference for a business with thin margins.
Many states also charge a franchise tax, essentially a fee for the privilege of operating in the state. Franchise taxes often apply even when a corporation reports no profit and may be based on net worth, authorized shares, or a flat annual amount. A company doing business in several states can end up filing returns and paying franchise fees in each one.
A state can only tax a corporation that has “nexus” with the state, meaning enough of a connection through employees, property, or sales to justify taxation. Federal law provides a narrow baseline protection: under Public Law 86-272, a state cannot impose an income tax on a company whose only in-state activity is soliciting orders for tangible goods, as long as those orders are approved and shipped from outside the state. Providing services, holding inventory, or having remote employees in a state will typically create nexus. When a corporation operates in multiple states, apportionment formulas divide the income among them, and each state’s formula and deadline are its own.
Taxes That Apply Whether or Not the Company Profits
Income tax gets most of the attention, but several other taxes come due regardless of whether a corporation has a good year.
- FICA taxes on payroll. Employers pay 6.2% of each employee’s wages toward Social Security (up to the annual wage base) and 1.45% toward Medicare, with no cap on the Medicare portion. Matching amounts are withheld from the employee’s paycheck, so the combined rate is 15.3% on wages up to the Social Security cap.10Internal Revenue Service. Topic No. 751, Social Security and Medicare Withholding Rates
- Federal unemployment tax. The statutory FUTA rate is 6.0% on the first $7,000 of each employee’s annual wages, but employers who pay state unemployment taxes on time get a credit of up to 5.4%, bringing the effective federal rate down to 0.6%. State unemployment tax rates vary based on the employer’s claims history and state-specific formulas.11Internal Revenue Service. Topic No. 759, Form 940 – Employers Annual Federal Unemployment (FUTA) Tax Return
- Property taxes. Corporations that own real estate, equipment, or other tangible property owe local property taxes assessed by counties and municipalities. These apply regardless of profitability and are often among the largest non-income tax costs for manufacturing and retail businesses.
- Excise taxes. Companies that produce or sell specific goods — fuel, tobacco, alcohol, airline tickets, certain chemicals — pay federal excise taxes calculated per unit or as a percentage of the sale price. Those are owed on the transaction itself, not on profit.
For labor-intensive businesses, employment taxes alone can dwarf the income tax bill. A company with 50 employees averaging $60,000 in wages owes roughly $230,000 a year just in the employer’s share of FICA, before a dollar of income tax is calculated.
What Actually Shrinks the Tax Bill
The effective tax rate most corporations pay is well below 21% because deductions and credits reduce the base or the bill. A deduction reduces taxable income before the rate applies; a credit reduces the tax itself, dollar for dollar. A $10,000 deduction saves $2,100 in tax at the 21% rate. A $10,000 credit saves $10,000.
Corporations can deduct ordinary and necessary business expenses — wages, rent, supplies, insurance, and interest on business loans. Depreciation lets a corporation spread the cost of equipment, machinery, and buildings over their useful life rather than deducting the full purchase price in the year of acquisition.12Office of the Law Revision Counsel. 26 USC 167 – Depreciation For asset-heavy businesses, this is one of the biggest levers.
Charitable giving is deductible, but for 2026 and beyond the rules tightened. Corporations can only deduct the portion of their charitable giving that exceeds 1% of taxable income, and the total deduction cannot exceed 10% of taxable income.13Office of the Law Revision Counsel. 26 USC 170 – Charitable, Etc., Contributions and Gifts A corporation with $5 million in taxable income that donates $100,000 can deduct $50,000, because the first $50,000 of giving falls under the 1% floor.
The research credit under Section 41 is one of the more valuable corporate credits. It generally equals 20% of qualified research expenses above a base amount, rewarding companies that invest in developing new products, processes, or software.14Internal Revenue Service. Qualified Small Business Payroll Tax Credit for Increasing Research Activities Small businesses with $5 million or less in gross receipts can apply part of the credit against payroll taxes instead of income taxes, which helps startups that don’t yet have income to offset.
When a corporation loses money, those losses don’t disappear. Net operating losses can be carried forward indefinitely to reduce taxable income in future profitable years, but a loss carryforward can offset no more than 80% of taxable income in any single year.15Office of the Law Revision Counsel. 26 USC 172 – Net Operating Loss Deduction So even a corporation with large accumulated losses will owe some tax in a strong recovery year.
Penalties for Late Filing and Late Payment
Filing late or paying late triggers automatic penalties. The failure-to-file penalty starts at 5% of the unpaid tax for each month the return is overdue, capping at 25%.16Internal Revenue Service. Failure to File Penalty A separate failure-to-pay penalty of 0.5% per month accrues on unpaid balances. When both apply in the same month, the failure-to-file penalty is reduced by the failure-to-pay amount, so the combined monthly hit stays at 5%, but the failure-to-pay penalty keeps running after the filing penalty maxes out.
Intentional evasion is a different category. Willfully attempting to evade federal taxes is a felony carrying up to five years in prison and fines of up to $100,000 for individuals or $500,000 for corporations.17Office of the Law Revision Counsel. 26 USC 7201 – Attempt to Evade or Defeat Tax Criminal prosecution is rare and focused on deliberate fraud, hidden offshore accounts, or fabricated deductions, but it’s the backstop behind the whole voluntary compliance system.