Do Business Owners Pay Taxes? Structure, Deductions, and Penalties

Yes, business owners pay taxes, and usually several kinds at once. The exact mix depends on how the business is structured, but almost every owner deals with federal income tax, self-employment or payroll tax, quarterly estimated payments, and state or local taxes on top. Pass-through owners (sole proprietors, partners, and S-corporation shareholders) report profits on their personal returns at rates from 10% to 37%, while C-corporations pay a flat 21% at the entity level.¹²

Income Tax Depends on Your Business Structure

Most small businesses are set up as pass-through entities, meaning the company itself does not owe federal income tax. Profits flow through to the owner’s personal return and are taxed at individual rates. For tax year 2026, those rates run from 10% on the first $12,400 of taxable income for single filers up to 37% on income above $640,600.¹ Sole proprietorships, partnerships, and S-corporations all work this way, which keeps the same dollar of profit from being taxed twice.

C-corporations are different. A C-corp is its own taxpayer and pays a flat 21% federal tax on profits.² If the corporation then hands after-tax profits to shareholders as dividends, the shareholders owe personal income tax on that money too. The company pays 21%, and the owner pays again at their individual rate on the dividend. That is the double taxation trade-off that comes with the corporate form.

S-corporation owners who actively work in the business sit in a middle position. The company has to pay them a reasonable salary, which is subject to payroll taxes like any other wages. Profits above that salary pass through to the owner without additional payroll tax. The IRS watches this arrangement closely, and setting your salary artificially low to avoid payroll taxes invites an audit and forced adjustments.³

Self-Employment Tax

If you run a business as a sole proprietor or partner and your net earnings reach $400 or more, you owe self-employment tax on top of income tax.⁴ This covers Social Security and Medicare, the same contributions that a traditional employer and employee split between them. Because you are both, you pay both halves: 12.4% for Social Security and 2.9% for Medicare, totaling 15.3%.⁵

The tax does not apply to every dollar of net profit. You first multiply your net self-employment earnings by 92.35% to arrive at the taxable amount.⁶ The Social Security portion also has a ceiling: for 2026, only the first $184,500 of combined wages and self-employment income is subject to the 12.4% rate.⁷ The 2.9% Medicare portion has no cap and applies to all net earnings.

High earners face an additional 0.9% Medicare surtax on self-employment income above $200,000 for single filers or $250,000 for married joint filers.⁵ One offset: you can deduct half of your self-employment tax as an adjustment to gross income on your personal return, which lowers both your income tax and your adjusted gross income.⁶

Payroll Taxes If You Have Employees

Bringing on employees creates a separate set of obligations. You must withhold federal income tax from each paycheck based on the employee’s Form W-4.⁸ On top of that, you pay a matching 7.65% share of Social Security and Medicare taxes for every employee, the same 6.2% for Social Security and 1.45% for Medicare that is withheld from their wages.⁹ Deposits are made on a semiweekly or monthly schedule depending on your payroll size.

You also owe federal unemployment tax (FUTA) at a rate of 6% on the first $7,000 of wages paid to each employee per year.¹⁰ Credits for state unemployment tax contributions typically drop the effective FUTA rate to 0.6%. FUTA is reported and paid annually on Form 940, due January 31 of the following year. Income tax withholding and FICA taxes are reported quarterly on Form 941, due at the end of the month after each quarter closes.¹¹

Payroll taxes carry a risk that other business taxes do not. The money you withhold from employee paychecks is considered held in trust for the government. If you fail to turn it over, whether from cash flow problems or neglect, the IRS can assess a trust fund recovery penalty equal to 100% of the unpaid amount against any person responsible for the failure.¹² That personal liability cannot be discharged by closing the business, and the IRS can pursue individual owners, officers, and even bookkeepers who had authority over the funds.

Quarterly Estimated Payments

Business owners do not wait until April to settle up. If you expect to owe $1,000 or more in combined income and self-employment tax for the year, you have to make estimated tax payments in four installments.¹³ The due dates for 2026 are April 15, June 16, September 15, and January 15 of 2027. Payments are calculated and submitted on Form 1040-ES.

Missing a payment or underpaying triggers a penalty that accrues on the shortfall for each day it is outstanding. Two safe harbor rules protect you:

Pay at least 90% of the tax you will owe for 2026 (the current-year method), or
Pay at least 100% of the tax shown on your 2025 return, or 110% if your 2025 adjusted gross income exceeded $150,000 ($75,000 if married filing separately).¹⁴

The prior-year method is especially useful when income swings. Even if profits jump, basing payments on last year’s tax bill keeps you penalty-free while you work out the final numbers.

State and Local Taxes

Federal is only part of the picture. Most states impose their own income tax on business profits or the owner’s personal income, with top corporate rates ranging from zero in a handful of states to over 11% at the high end. About 44 states levy some form of corporate income tax, and several of the remaining states collect through gross receipts taxes instead.

If you sell products or certain services, you will likely need to collect sales tax from customers and remit it to the state. That requires registering for a seller’s permit and filing returns on a schedule the state sets, monthly, quarterly, or annually depending on your volume. Since a 2018 Supreme Court decision, states can also require you to collect sales tax on online sales even without a physical presence there. The threshold in most states is $100,000 to $200,000 in annual sales into that state, with some states also looking at transaction counts.

Local governments add another layer. Many cities and counties charge business license fees, gross receipts taxes, or privilege taxes based on your revenue rather than your profit. These are typically smaller amounts, annual fees running from roughly $50 to several hundred dollars, but missing them can result in fines or losing your authorization to operate in that jurisdiction.

Deductions That Reduce What You Actually Owe

The tax code lets you subtract ordinary and necessary business expenses from gross income before calculating what you owe. A few deductions are especially valuable for owners.

Pass-through owners can deduct up to 20% of their qualified business income before figuring personal income tax. This is the Section 199A deduction, made permanent by the One Big, Beautiful Bill Act signed in July 2025.¹⁵ For an owner earning $100,000 in qualified profit, that could mean a $20,000 reduction in taxable income. Above certain income thresholds, limits kick in based on the type of business, wages paid to employees, and the value of business property. Service-oriented businesses like consulting, law, and accounting face tighter restrictions at higher income levels. The deduction is calculated on Form 8995 or 8995-A and is taken on your personal return whether or not you itemize.

The home office deduction applies if you use part of your home exclusively and regularly for business. You can choose a simplified method (which is $5 per square foot, up to 300 square feet, for a maximum $1,500 deduction) or calculate actual expenses like a proportional share of rent, utilities, and insurance.¹⁶ The exclusive-use requirement is strict. A desk in a room that doubles as a guest bedroom does not qualify.

For business driving, the 2026 standard mileage rate is 72.5 cents per mile.¹⁷ You can use this rate instead of tracking actual vehicle costs like gas, maintenance, and depreciation. Either way, you need a contemporaneous log of business miles, including date, destination, and business purpose. This is the deduction the IRS challenges most often in audits, and reconstructions done after the fact rarely hold up.

Combined with the deduction for half of your self-employment tax and ordinary business expenses like supplies, software, professional services, and health insurance premiums, the effective tax rate for most owners ends up well below the headline bracket rate.

Penalties for Late Filing and Late Payment

The IRS treats filing late and paying late as separate failures and charges a penalty for each, so doing both costs you twice.

Failure to file: 5% of the unpaid tax for each month or partial month the return is late, capping at 25%. If the return is more than 60 days late, the minimum penalty for 2026 is $525 or the full amount of unpaid tax, whichever is smaller.¹⁸
Failure to pay: 0.5% of the unpaid tax per month, also capping at 25%.¹⁹

When both penalties apply at once, the failure-to-file penalty is reduced by the failure-to-pay amount, so the combined monthly hit is 5% for the first five months. After that, the filing penalty maxes out but the payment penalty keeps running. The practical takeaway: if you cannot pay on time, file on time anyway. The filing penalty is ten times steeper per month than the payment penalty.

Payroll tax violations sit in a class of their own. Failing to remit withheld employee taxes exposes responsible individuals to a penalty equal to 100% of the unpaid amount.¹² The IRS treats payroll tax delinquency among the most serious compliance failures and pursues collections aggressively.

1
Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026
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Office of the Law Revision Counsel. 26 USC 11 – Tax Imposed
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Internal Revenue Service. Paying Yourself
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Internal Revenue Service. Self-Employment Tax (Social Security and Medicare Taxes)
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Office of the Law Revision Counsel. 26 USC 1401 – Rate of Tax
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Internal Revenue Service. Topic No. 554, Self-Employment Tax
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Social Security Administration. Contribution and Benefit Base
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Internal Revenue Service. About Form W-4, Employee’s Withholding Certificate
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Office of the Law Revision Counsel. 26 USC 3101 – Rate of Tax
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Office of the Law Revision Counsel. 26 USC 3301 – Rate of Tax
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Internal Revenue Service. Employment Tax Due Dates
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Office of the Law Revision Counsel. 26 USC 6672 – Failure to Collect and Pay Over Tax
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Office of the Law Revision Counsel. 26 USC 6654 – Failure by Individual to Pay Estimated Income Tax
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Internal Revenue Service. Form 1040-ES Estimated Tax for Individuals (2026)
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Internal Revenue Service. Qualified Business Income Deduction
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Internal Revenue Service. Simplified Option for Home Office Deduction
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Internal Revenue Service. IRS Sets 2026 Business Standard Mileage Rate
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Internal Revenue Service. Failure to File Penalty
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Internal Revenue Service. Topic No. 653, IRS Notices and Bills, Penalties and Interest