2026 U.S. FEDERAL / SIMPLIFIED ESTIMATE
C-corp
tax calculator.
Estimate the regular 21% federal corporate income-tax component from annual federal taxable income.
Educational estimate only — not personalized tax, legal or financial advice. This tool does not select a business entity, determine reasonable salary, prepare a return or calculate the payment you must make. Review your actual circumstances with a qualified tax professional. Inputs stay in your browser and are not saved or sent by the calculator. Do not enter identifying information.
Your scenario.
Regular federal corporate income tax only. Shareholder, payroll and state taxes are separate. Read the limitations below.
2026 FEDERAL COMPONENTS / NOT A COMPLETE TAX BILL
Regular federal corporate income tax
—- Entered federal taxable income
- —
- Taxable income less modeled federal tax
- —
Excludes credits and other taxes described below. This is not a required payment, tax refund or available-cash calculation.
Understand
the estimate.
Method and example.
The regular federal corporate income-tax component is 21% of positive federal taxable income. A $100,000 taxable-income example produces $21,000 tax and a $79,000 arithmetic remainder. That remainder is not a bank balance, distributable cash or shareholder take-home pay.
Corporation versus shareholder.
Corporate tax and shareholder taxes are separate. Dividends and personal gifts to family are not automatically deductible business expenses. Distributing profit can create additional shareholder tax, which is not calculated here. A personal allocation of profit does not reduce the corporate tax base.
What is excluded?
Shareholder taxes, payroll taxes, state/franchise taxes, corporate alternative minimum tax, credits, NOL limitations, special deductions, international rules, tax payments and penalties. This tool assumes you have already established regular federal taxable income. Negative income and loss carryovers require a separate analysis. Do not use the output as a complete corporate return or required estimated payment.
Official references, checked October 18, 2026: IRS 2026 brackets and standard deductions; SSA wage base; IRS self-employment tax; Additional Medicare tax; corporate income tax; S-corp reasonable compensation.
Educational estimate only — not personalized tax, legal or financial advice. This tool does not select a business entity, determine reasonable salary, prepare a return or calculate the payment you must make. Review your actual circumstances with a qualified tax professional. Inputs stay in your browser and are not saved or sent by the calculator. Do not enter identifying information.
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