S-Corp vs. LLC: Which Business Structure Saves You More in Taxes?

What Is an LLC?

A Limited Liability Company (LLC) is a business structure that provides personal liability protection for its owners, called members. LLCs are popular because they offer the liability protection of a corporation with the tax flexibility of a partnership. For tax purposes, a single-member LLC is typically taxed as a sole proprietorship, while a multi-member LLC is taxed as a partnership. This pass-through taxation means business income flows through to the owners' personal tax returns.

LLCs are relatively simple to form and maintain. They require fewer formalities than corporations, though requirements vary by state. The main advantage is liability protection — your personal assets are generally protected from business debts and lawsuits. The main disadvantage for profitable businesses is that all income is subject to self-employment tax, which includes both the employee and employer portions of Social Security and Medicare taxes.

What Is an S-Corporation?

An S-Corporation is a tax election, not a separate business structure. You form an LLC or corporation and then elect S-Corp status with the IRS. The S-Corp election allows the business to be taxed as a corporation while maintaining pass-through taxation. The key tax advantage is that S-Corp owners can classify part of their income as a salary (subject to payroll taxes) and part as a distribution (not subject to self-employment tax).

To qualify for S-Corp status, the business must have fewer than 100 shareholders, only one class of stock, and shareholders who are U.S. citizens or residents. S-Corps require more formalities than LLCs, including adopting bylaws, issuing stock, holding regular meetings, and maintaining corporate minutes. They also require payroll processing because the owner must be on the payroll as an employee.

The Self-Employment Tax Problem

Self-employment tax consists of Social Security tax (12.4% on wages up to the annual wage base limit of $184,500 in 2026) and Medicare tax (2.9% on all wages, with no income limit). As a sole proprietor or LLC taxed as a sole proprietorship, you pay the full 15.3% on all your net earnings from self-employment. As an employee, you would only pay half (7.65%) and your employer would pay the other half.

This self-employment tax is in addition to regular income tax. For a business owner earning $100,000, self-employment tax adds $15,300 in taxes on top of income tax. An S-Corp allows you to reduce this tax burden by taking a reasonable salary and taking the remainder as distributions, which are not subject to self-employment tax.

How S-Corp Tax Savings Work

The S-Corp strategy works by splitting your business income into two buckets: salary and distributions. Salary is subject to payroll taxes (Social Security, Medicare, federal and state unemployment taxes). Distributions are not subject to self-employment tax, though they are still subject to income tax. The IRS requires that S-Corp owners pay themselves a "reasonable salary" for the work they perform — you cannot take all income as distributions to avoid payroll taxes entirely.

S-Corp vs. LLC Example

Consider a business with $100,000 in net income. As an LLC taxed as a sole proprietorship, the owner pays 15.3% self-employment tax on the full $100,000, or $15,300. As an S-Corp, the owner takes a $60,000 reasonable salary and $40,000 in distributions. Payroll taxes on the $60,000 salary are approximately $9,180 (15.3%). The $40,000 distribution has no self-employment tax. Total payroll tax is $9,180, saving $6,120 compared to the LLC.

However, the S-Corp incurs additional costs: payroll processing fees (typically $50 to $150 per month), state franchise taxes (some states charge S-Corps an annual fee), and the cost of additional tax preparation and compliance. If these costs exceed $6,120, the S-Corp provides no net benefit. The savings also depend on the reasonable salary determination — if the IRS requires a higher salary, the savings shrink.

When Does an S-Corp Make Sense?

S-Corp status typically makes financial sense when your business profit exceeds approximately $60,000 to $80,000 annually. Below this threshold, the tax savings are often insufficient to cover the additional compliance costs. The break-even point varies based on your state's franchise tax rates, payroll processing costs, and the reasonable salary for your role.

S-Corps are most beneficial for service businesses where the owner performs most of the work and the business has relatively few deductible expenses. If your business has substantial deductible expenses that reduce your net income, the S-Corp advantage is smaller because self-employment tax is calculated on net income, not gross revenue.

Reasonable Salary Requirements

The IRS requires S-Corp owners to pay themselves a reasonable salary for the services they perform. Reasonable compensation is what the business would pay to hire someone else to perform the same services. Factors include your duties, hours worked, your qualifications, and prevailing compensation for similar roles in your industry and location.

The IRS aggressively audits S-Corps that take unreasonably low salaries to avoid payroll taxes. If the IRS determines your salary is too low, it can reclassify distributions as wages, impose back payroll taxes, penalties, and interest. There is no precise formula for reasonable salary, but a common rule of thumb is that salary should be at least 40% to 50% of total business income for service businesses. Consult a tax professional to determine an appropriate salary for your situation.

State-Specific Considerations

Some states make S-Corp elections less attractive. California, for example, charges S-Corps a franchise tax of 1.5% on net income with a minimum of $800 annually. New York City charges an unincorporated business tax that can negate S-Corp benefits. Other states have additional fees or taxes on S-Corps. Research your state's specific requirements before making an election.

Some states do not recognize S-Corp status for state tax purposes, meaning you would file as an S-Corp federally but as something else at the state level. This adds complexity and cost. Other states have their own versions of S-Corp status with different requirements. State-specific factors can significantly affect whether an S-Corp makes sense for your business.

Common Mistakes to Avoid

One mistake is electing S-Corp status too early. The tax savings at low income levels are often insufficient to cover payroll processing costs, state franchise taxes, and additional accounting fees. Wait until your business profit consistently exceeds the break-even point before making the election. You can always elect S-Corp status later when it makes financial sense.

Another error is not maintaining proper corporate formalities. S-Corps must hold annual meetings, keep minutes, maintain separate bank accounts, and follow other corporate formalities. Failing to do so can pierce the corporate veil, exposing you to personal liability, and can jeopardize your S-Corp status with the IRS. Treat the S-Corp as a separate entity from yourself.

Finally, do not forget about qualified business income (QBI) deduction. The Tax Cuts and Jobs Act created a 20% deduction for qualified business income, which applies to pass-through entities including LLCs and S-Corps. The deduction has income limits and other restrictions, but it can reduce the effective tax rate for both structures. Factor the QBI deduction into your comparison.

Related Tools on ProfessionCalculators.com

In addition to the Self-Employment Tax Calculator, these tools can help with business structure decisions:

• Self-Employment Tax Calculator — Calculate your self-employment tax liability as a sole proprietor
• Take-Home Pay Calculator — Compare take-home pay under different structures

Frequently Asked Questions

Can an LLC be an S-Corp?

Yes. An LLC is a legal business structure formed under state law, while S-Corp is a tax election made with the IRS. You form an LLC with your state and then file Form 2553 with the IRS to elect S-Corp tax treatment. The LLC provides liability protection, and the S-Corp election provides the tax advantages. This is the most common structure for small businesses that want S-Corp tax treatment.

What is a reasonable salary for an S-Corp owner?

Reasonable salary is what you would pay someone else to perform the same work. Factors include your role, responsibilities, hours worked, your experience and qualifications, and what similar businesses pay for comparable positions. The IRS provides guidance but no precise formula. For service businesses where the owner is the primary worker, salary is typically 40% to 60% of business income. Consult a tax professional and research industry salary data to determine an appropriate salary for your situation.

How much does it cost to maintain an S-Corp?

Costs vary by state and business complexity. Typical costs include payroll processing ($50 to $150 per month), state franchise taxes (some states charge annual fees ranging from $800 to several thousand dollars), additional tax preparation ($500 to $2,000 more than a simple return), and potential legal and accounting fees for compliance. Total annual costs often range from $1,500 to $5,000 or more. These costs must be weighed against the tax savings to determine if an S-Corp makes financial sense.

Can I change from LLC to S-Corp or vice versa?

Yes. You can elect S-Corp status by filing Form 2553 with the IRS. The election must be made by March 15 of the year you want the election to take effect, or within 2 years and 75 days of incorporating for new businesses. You can also revoke S-Corp status by filing a statement with the IRS, though this is rarely done. Changing business structures has tax consequences and should be done with professional guidance.

Do S-Corps pay less taxes than LLCs?

S-Corps can pay less in self-employment tax by splitting income into salary and distributions. However, both structures pay the same income tax on business income. The S-Corp advantage is specifically in avoiding self-employment tax on distributions. Whether an S-Corp actually pays less total tax depends on your income level, reasonable salary, state taxes, and compliance costs. For many profitable businesses, S-Corps do pay less total tax, but not always.

Conclusion

The LLC vs. S-Corp decision comes down to one calculation: do the self-employment tax savings exceed the additional compliance costs at your income level? For most businesses under $50,000 in net profit, the answer is no. Above $80,000 in net profit, the savings are often meaningful. Calculate the break-even for your specific situation, account for state-specific factors, and consult a tax professional before filing IRS Form 2553.

Our Self-Employment Tax Calculator models your liability under both structures. Once you know your structure, see our guide on how to calculate your freelance hourly rate to ensure your pricing accounts for the actual after-tax cost of your time.