2026 S-Corp Tax Calculator Tax Year 2026
Estimate your federal tax liability as an S-Corporation shareholder in 2026. This calculator models pass-through income taxation, the 20% QBI deduction, and the payroll tax savings from reasonable compensation vs. distributions.
2026 S-Corp Tax Overview
An S-Corp is a pass-through entity. Unlike a C corporation, the S-Corp itself does not pay federal income tax. Instead, the business's income, deductions, and credits pass through to the shareholders' personal tax returns. Shareholders report their pro-rata share of the S-Corp's income on their individual returns and pay tax at their ordinary income tax rates (10% to 37%).
2026 Individual Income Tax Brackets
S-Corp shareholders pay tax on pass-through income using the same brackets as other ordinary income. The 2026 brackets are:
| Rate | Single | Married Filing Jointly | Head of Household |
|---|---|---|---|
| 10% | $0 – $12,400 | $0 – $24,800 | $0 – $17,700 |
| 12% | $12,401 – $50,400 | $24,801 – $100,800 | $17,701 – $67,450 |
| 22% | $50,401 – $105,700 | $100,801 – $211,400 | $67,451 – $105,700 |
| 24% | $105,701 – $201,775 | $211,401 – $403,550 | $105,701 – $201,750 |
| 32% | $201,776 – $256,225 | $403,551 – $512,450 | $201,751 – $256,200 |
| 35% | $256,226 – $640,600 | $512,451 – $768,700 | $256,201 – $640,600 |
| 37% | $640,601+ | $768,701+ | $640,601+ |
Source: IRS Revenue Procedure 2025-32. The top individual rate of 37% was made permanent by the OBBBA of 2025.
Qualified Business Income (QBI) Deduction — Section 199A
The 20% QBI deduction under Section 199A allows eligible S-Corp shareholders to deduct up to 20% of their qualified business income on their personal tax returns. This deduction has been made permanent under the OBBBA of 2025, providing long-term certainty for pass-through business owners.
For 2026, a new minimum $400 QBI deduction applies for owners with at least $1,000 of QBI from an active business in which they materially participated.
Reasonable Compensation & Payroll Tax Savings
S-Corp shareholder-employees must pay themselves a reasonable salary for the work they perform. This salary is subject to payroll taxes (FICA) — 12.4% for Social Security (up to the 2026 wage base of $176,100) and 2.9% for Medicare, with no cap.
The key tax advantage of an S-Corp is that distributions above reasonable compensation are not subject to self-employment tax. This can result in significant tax savings. The calculator models this by applying the 15.3% SE tax rate to the full net profit (S-Corp owners are generally not subject to SE tax on distributions).
How the Calculator Works
- Calculate Pass-Through Income: S-Corp net profit minus reasonable salary (which is already taxed via payroll).
- Apply QBI Deduction: 20% of QBI, subject to limitations (simplified model).
- Calculate Taxable Income: Pass-through income + other income − QBI deduction − other deductions.
- Apply Income Tax: Using 2026 individual tax brackets based on filing status.
- Calculate Payroll Tax: 15.3% (7.65% employee + 7.65% employer) on reasonable salary up to the wage base, plus Medicare on amounts above.
- Calculate Total Tax: Income tax + payroll tax.
Important Disclaimer
This calculator provides estimates for educational and planning purposes. It does not constitute official tax advice. Actual tax liability may vary based on your specific circumstances, including SSTB limitations, wage and property limitations on the QBI deduction, phaseouts, and state taxes. Always consult a qualified tax professional for accurate tax guidance.
❓ 2026 S-Corp Tax Calculator FAQ
What is an S-Corporation?
An S-Corporation is a pass-through entity that does not pay federal income tax at the corporate level. Instead, income, deductions, and credits pass through to shareholders, who report them on their personal tax returns.
What tax rate does an S-Corp pay?
An S-Corp itself pays no federal income tax. Shareholders pay tax on their share of the S-Corp's income at their individual ordinary income tax rates, which range from 10% to 37% in 2026.
What is the QBI deduction for 2026?
The QBI deduction (Section 199A) allows eligible S-Corp shareholders to deduct up to 20% of their qualified business income. It has been made permanent under the OBBBA of 2025. A new minimum $400 deduction applies for 2026 for owners with at least $1,000 of QBI from an active business.
What is reasonable compensation for an S-Corp owner?
Reasonable compensation is the salary that S-Corp shareholder-employees must pay themselves for the work they perform. The IRS defines it as what you would pay an unrelated third party for the same job under the same conditions.
How does an S-Corp save on self-employment tax?
An S-Corp's distributions above reasonable compensation are not subject to self-employment tax (15.3%). This can result in significant tax savings compared to a sole proprietorship or LLC taxed as a partnership.
What is the 2026 Social Security wage base?
The 2026 Social Security wage base is $176,100. The 12.4% Social Security tax applies to earnings up to this limit. The 2.9% Medicare tax applies to all earnings with no cap.
What is the top individual tax rate for 2026?
The top individual income tax rate for 2026 is 37%, made permanent by the OBBBA of 2025.
Can I use this calculator if I have an SSTB?
This calculator provides a simplified estimate and does not fully model the SSTB phaseout rules for the QBI deduction. If you own a specified service trade or business (SSTB), the QBI deduction may be limited or eliminated at higher income levels. Consult a tax professional for accurate guidance.
Does the QBI deduction have limitations?
Yes. The QBI deduction is generally limited to the greater of 50% of W-2 wages paid or 25% of W-2 wages plus 2.5% of the unadjusted basis of qualified property. SSTB owners face additional phaseout limitations.
What is the deadline to elect S-Corp status for 2026?
The deadline to elect S-Corporation status for the 2026 tax year is March 16, 2026 (since March 15 falls on a Sunday).
Are there penalties for S-Corp compliance issues?
Yes. For 2026, the IRS imposes a penalty of $220 per shareholder per month for late S-Corp filings, with a maximum of 12 months. Late payments incur a 0.5% per month penalty plus 4% annual interest.
Is this calculator free?
Yes, this calculator is completely free to use. No registration or personal data storage is required. All calculations are performed in your browser.