S-Corp vs LLC Tax Comparison 2026: What Actually Changes on Your Return

By AE Tax Advisors Team · Billings, Montana · Updated 2026-11-06

The Comparison Is Not LLC vs S-Corp

An LLC is formed under state law and governs liability, ownership, and governance. It has no default federal tax treatment of its own. A single-member LLC is disregarded and reported on Schedule C, a multi-member LLC defaults to partnership taxation on Form 1065, and either can elect S-Corp treatment on Form 2553.

So the real decision is whether to make the S election, and it can be made by an LLC or a corporation. Making the election does not change your liability protection, your operating agreement, or your state filing status. It changes how profit is characterized and taxed.

This matters because many owners form a corporation when they wanted an LLC, on the belief that S-Corp status required it. An LLC taxed as an S-Corp gives you the payroll tax result with the simpler state law entity.

Where the Savings Actually Come From

Under default treatment, all net earnings from self-employment are subject to SE tax at 15.3%, comprising 12.4% Social Security up to the annual wage base and 2.9% Medicare with no cap, plus the 0.9% additional Medicare tax above $200,000 single or $250,000 married filing jointly. Half of the SE tax is deductible above the line.

Under S-Corp treatment, only the owner's W-2 wages are subject to payroll tax. Distributions of remaining profit are not subject to SE tax or payroll tax.

Employment-tax savings must be calculated by comparing self-employment tax under default treatment with employer and employee payroll taxes on reasonable S-Corp wages. The self-employment calculation generally applies the 92.35% net-earnings adjustment; both calculations must account for the Social Security wage base, other wages and applicable Medicare taxes. Income-tax effects, including Section 199A, must be modeled separately.

The S election does not make business profit tax-free. It changes employment-tax treatment, while compensation and Section 199A can also change income-tax results.

A Numerical Comparison at Several Income Levels

Table assumptions: tax year 2026; married filing jointly; one business owner with no other wages or self-employment income and a spouse with no wages or self-employment income. The calculations use the $184,500 Social Security wage base and the $250,000 joint-return Additional Medicare Tax threshold. Net profit is before owner wages and employer payroll taxes. Wage amounts are hypothetical inputs, not reasonable-compensation findings or a percentage-of-profit safe harbor. The SE tax column includes applicable Additional Medicare Tax, and the payroll column includes both employer and employee FICA plus any applicable Additional Medicare Tax. Employer payroll taxes reduce remaining business profit. Gross saving excludes income-tax/QBI effects, state taxes, unemployment taxes, and compliance costs. The final column subtracts only the illustrative ~$3,000 cost allowance; it is not a complete net tax benefit or a fee quote.

These are approximations using the 2026 Social Security wage base and standard rates, and they ignore state payroll taxes and unemployment insurance, which reduce the benefit somewhat. Confirm current-year figures before relying on them.

At the $60,000 profit and $40,000 wage assumptions shown, the illustrative compliance cost exceeds the gross saving. This is not a universal breakeven point. Savings depend on the 92.35% self-employment net-earnings adjustment, supportable wages, the Social Security wage base, other earnings, filing status, and applicable Medicare taxes. Calculate both tax regimes separately rather than multiplying an assumed distribution by a flat rate.

The Costs You Are Trading Against

An S-Corp requires a separate return on Form 1120-S with K-1s to shareholders, actual payroll with quarterly Forms 941, annual Form 940, W-2 and W-3 filings, and state payroll registration and returns.

Realistic annual cost is $1,500 to $2,500 for the tax return and $600 to $1,500 for payroll processing, plus state unemployment insurance and any state-level entity or franchise taxes. Several states impose an S-Corp franchise tax or minimum fee that can materially change the math.

There are also structural costs. Reasonable compensation must be documented and defended. Basis must be tracked, and distributions in excess of basis are taxable gain. Health insurance for a more-than-2% shareholder must run through W-2 wages to be deductible. And the S-Corp cannot allocate income disproportionately to ownership, which a partnership can.

Ownership and Eligibility Restrictions

S-Corps have eligibility rules that partnerships do not. No more than 100 shareholders, only one class of stock, and shareholders limited to individuals, certain trusts and estates, and certain exempt organizations. Nonresident aliens cannot be shareholders, and corporations and partnerships cannot hold S-Corp stock.

The single class of stock requirement is the one that most often forces a different answer. If you need preferred returns, waterfall distributions, or special allocations, an S-Corp cannot do it and an LLC taxed as a partnership can. This is why real estate ventures with outside investors are almost never S-Corps.

Real estate is generally a poor fit for S-Corp treatment for a second reason: distributing appreciated property out of an S-Corp triggers gain recognition as though it were sold at fair market value, while a partnership can generally distribute property without gain. Locking appreciating real estate inside an S-Corp creates an exit problem that is difficult to undo.

Interaction With the Section 199A Deduction

The qualified business income deduction under Section 199A, made permanent by the OBBBA, allows up to a 20% deduction against qualified business income, and it interacts with the wage decision in a way that cuts against minimizing wages.

The deduction is generally up to 20% of QBI, subject to limits including taxable income less net capital gain. Owner W-2 compensation is not QBI, and deductible employer payroll costs can reduce QBI even below the taxable-income thresholds. The wage-and-property limitations phase in over the applicable range above those thresholds; they do not switch on in full immediately.

For a specified service trade or business, such as many health, law, accounting, consulting, or financial-service businesses, Section 199A eligibility phases out over the applicable taxable-income range. Above that range, an owner generally cannot claim a QBI deduction from the specified service business, even if it pays W-2 wages. Check the actual business classification and current-year thresholds.

For a business that is not a specified service trade or business, the fully applicable limitation generally uses the greater of 50% of W-2 wages or 25% of W-2 wages plus 2.5% of qualifying property basis. Reducing owner wages can lower this limit while also changing QBI, so payroll-tax and income-tax effects must be modeled together. A lower salary does not automatically improve the total tax result.

When to Elect, and When Not To

Elect when net profit reliably exceeds roughly $80,000 per owner, the business is not a real estate holding entity, ownership is simple and eligible, and you are prepared to run genuine payroll.

Do not elect when profit is volatile or below the breakeven, when you hold appreciating real estate, when you need special allocations or multiple equity classes, when you have ineligible owners, or when the QBI wage limitation would cost more than the payroll tax saved.

Timing matters. Form 2553 is generally due within two months and fifteen days after the beginning of the tax year the election is to take effect. Revenue Procedure 2013-30 provides relief for late elections within three years and seventy-five days where there was reasonable cause, which is granted routinely when the facts support it.

Key Takeaways

• An LLC can elect S-Corp taxation; the two are layers, not alternatives.
• An S election can reduce employment taxes; income-tax effects must also be modeled.
• Breakeven is roughly $60,000 to $80,000 of net profit per owner after compliance costs.
• Above the Section 199A thresholds, a lower wage can cost more in lost QBI deduction than it saves in payroll tax.
• Appreciating real estate does not belong in an S-Corp because distributions trigger gain.

Frequently Asked Questions

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• Reasonable Compensation for S-Corp Owners
• C-Corp Income Shifting Strategy
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• Business Owner and Small Business Tax Services
• Advanced Tax Strategies for Business Owners