S-Corp vs LLC: Which Entity Structure Saves You More Tax in 2026?

Clear up the category error first

Most confusion about S-corp vs LLC tax differences comes from comparing two things that are not alternatives.

An LLC is formed under state law and determines liability protection, ownership flexibility, and governance. An S-corp is a federal tax classification made by filing Form 2553. An LLC can elect to be taxed as an S-corp and remain an LLC in every legal respect. The state paperwork does not change. Only the tax treatment does.

So the real question is not which entity to form. It is whether an existing LLC should make the election.

What the default treatment costs

A single-member LLC is disregarded by default, with profit reported on Schedule C. A multi-member LLC defaults to partnership treatment. In both cases the owner pays self-employment tax on net earnings.

For 2026 that is 15.3% on 92.35% of net self-employment earnings: 12.4% for Social Security on earnings up to the $184,500 wage base, and 2.9% for Medicare with no cap at all. An additional 0.9% Medicare tax applies above $200,000 for single filers and $250,000 for joint filers, and those thresholds are fixed in statute rather than indexed.

Half the self-employment tax is deductible above the line, which softens it without removing it. The structural point is that self-employment tax applies to every dollar of net profit whether or not the owner takes the money out.

What the election changes

After an S-corp election, the owner who works in the business becomes an employee of it. One number becomes two:

• A reasonable salary, run through payroll and subject to FICA
• Distributions of remaining profit, subject to neither FICA nor self-employment tax

The saving is 15.3% on the distribution portion, and only that portion. Nobody avoids payroll tax on the whole profit.

A worked illustration at 2026 rates. An owner with $150,000 of net profit and a defensible $90,000 salary pays payroll tax on $90,000 rather than self-employment tax on $138,525, which published modeling puts at roughly $13,770 against roughly $21,194. The gross difference is around $7,400 before costs.

The costs that eat into it

The election is not free, and this is where thin analysis goes wrong.

Running payroll requires a provider, quarterly Form 941 filings, annual Form 940, W-2 issuance, and state unemployment registration. Form 1120-S replaces the Schedule C, and it costs more to prepare. Many states impose franchise taxes or minimum fees on S-corps that do not apply to disregarded LLCs.

Published estimates put annual compliance costs between roughly $1,500 and $5,000 depending on state and provider. That range is why the breakeven sits where it does. Most analyses place it around $60,000 to $80,000 of net profit, below which the savings rarely clear the administrative cost.

The interaction almost nobody mentions

Here is the part that reverses the conclusion for some businesses.

Wages paid to an S-corp owner are not qualified business income. Only the distribution portion counts toward the Section 199A deduction. So every dollar moved from distribution into salary reduces the QBI deduction at the same time it increases payroll tax. The salary decision pulls in two directions at once, and the optimum is not simply the lowest defensible number.

Above the 2026 QBI thresholds of $201,750 for single filers and $403,500 for joint filers, the logic inverts again. In the phase-in range and beyond, the deduction for a non-service business becomes limited by W-2 wages paid and qualified property. A sole proprietor with no employees pays no W-2 wages at all and can lose the deduction entirely. An S-corp paying the owner a salary generates W-2 wages that support the limitation. For a high-earning owner, the election can preserve a QBI deduction that the default structure would forfeit.

That is a genuinely different calculation from the self-employment tax one, and it runs in the opposite direction at the top of the income range.

Reasonable compensation is the exposure

The IRS requires shareholder-employees to take reasonable compensation for the work performed before taking distributions, and it can reclassify distributions as wages where the salary is unreasonably low. The standard is what the business would pay an unrelated person to do the same job.

A defensible position rests on documented comparables: role, industry, geography, hours, and the owner's actual responsibilities. A number chosen because it produced an attractive tax outcome is not a position. It is a target.

Running the numbers before the election

Form 2553 must generally be filed within two months and fifteen days of the start of the tax year for the election to apply to that year, which places the deadline in mid-March for calendar-year businesses. New entities get the same window from formation. Missing it pushes the election to the following year, though late election relief is available in some circumstances.

Before filing, three things need modeling together: the self-employment tax saving, the QBI effect in both directions, and the full compliance cost in the specific state. Rakesh Jain, CPA PC runs that comparison on actual figures, because at the margin the answer genuinely goes either way.

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