S-Corp vs. LLC: Which Structure Saves More in 2025?

When most founders register a business, they form an LLC because it is simple, flexible, and limits personal liability. That is all true — but the tax treatment of an LLC is frequently misunderstood. By default, a single-member LLC is taxed as a sole proprietor and a multi-member LLC as a partnership. In both cases, all net profit flows through to your personal return, and you owe self-employment (SE) tax — 15.3% — on every dollar of profit up to the Social Security wage base ($168,600 in 2024), plus 2.9% on everything above that.

For a business generating $200,000 in profit, that SE tax bill is roughly $28,000 per year. That is not income tax — that is the owner's share of Social Security and Medicare, paid entirely by the business owner.

An S-Corp election (made by filing IRS Form 2553) does not change your legal entity — you can elect S-Corp status as an LLC. What changes is how the IRS taxes your income.

As an S-Corp, you split your business income into two buckets:

1. Reasonable salary — subject to payroll taxes (Social Security and Medicare) 2. Distributions — not subject to SE tax

If your business generates $200,000 in profit and the IRS would consider a reasonable salary for your role to be $80,000, then only the $80,000 is subject to SE taxes. The remaining $120,000 passes through as a distribution — no SE tax. At current rates, that saves approximately $18,000 per year.

Over five years, that is $90,000 in your pocket rather than the IRS's.

The S-Corp election is not right for everyone. It creates additional compliance costs — payroll, quarterly filings, a separate business bank account, and a reasonable salary requirement that must be documented and defensible. These costs typically run $2,000–$5,000 per year in accounting and payroll fees.

The breakeven point is generally around $40,000–$50,000 in annual net profit. Below that, the compliance costs often exceed the SE tax savings. Above it, the S-Corp advantage grows substantially.

Other factors to consider:

- Investor structure: S-Corps can have only one class of stock and no more than 100 shareholders, all of whom must be U.S. citizens or residents. If you plan to raise outside capital, a C-Corp may be more appropriate. - Passive income: S-Corps have restrictions on passive income that may affect certain businesses. - State taxes: Texas has no personal income tax but does levy a franchise tax. The franchise tax treatment of S-Corps vs. LLCs in Texas requires its own analysis.

The IRS requires S-Corp owners who perform services for the company to pay themselves a "reasonable salary." This is the most scrutinized area of S-Corp compliance and the one that generates the most audits.

A reasonable salary is based on what you would pay someone to do your job in the open market. Factors the IRS considers include your industry, geographic market, the services you actually perform, comparable wages for similar roles, and the overall profitability of the business.

Setting your salary too low is an audit red flag. A good rule of thumb is to set your W-2 wages at roughly 40–60% of your S-Corp's net profit, with appropriate adjustments for your specific role and industry. Your tax advisor should document this analysis and keep it on file.

If your business generates more than $50,000 in annual net profit and you are currently operating as a sole proprietor or single-member LLC without an S-Corp election, you are almost certainly overpaying SE taxes. The math is usually compelling — but the details matter.

Before electing S-Corp status, work with a qualified tax advisor to model your specific numbers, confirm that your salary is defensible, and set up the required payroll infrastructure. Done correctly, an S-Corp election is one of the highest-ROI decisions a small business owner can make.