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What is an S Corp? A Complete Guide

Written by Lettuce | November 5, 2025

Combining an LLC with an S Corp tax election is a savvy strategy for solopreneurs aiming to maximize tax savings while safeguarding personal assets. Once profits consistently exceed the $60,000 benchmark, S Corp status empowers solo business owners to cut self-employment taxes, saving thousands annually. Thanks to modern automation tools, forming and maintaining an S Corp has never been easier, transforming what used to be a compliance headache into a streamlined process.

Before we dive in, let’s clear something up. When thinking about your business, you don’t have to choose between an LLC and an S Corp. You can (and probably should) have both! You can organize your business as an LLC and designate it as an S Corp for tax purposes. This guide has what you need to know.

What is an S Corp?

An S Corp…

  1. Is a tax classification governed by the federal government (IRS)

  2. Tells the IRS how to tax your business, specifically that certain portions of your income should be taxed differently (saving you money)

  3. Identifies you as both the employer and the employee, so you get to take the deductions of the employer and enjoy the benefits of being an employee

When your business is organized as an LLC with S Corp tax status, you gain access to some tax-saving benefits that typically only large corporations enjoy.

Top 6 Perks of an S Corp

  1. Pay yourself a salary (which reduces your business’s taxable income)

  2. Pay for your family’s health insurance premiums through the
    business (deduct them as the employer and enjoy them as the employee)

  3. Make both Owner and Employee contributions to a Solo 401(k) plan, which you can write off as a business expense

  4. Purchase assets–things like equipment, vehicles, and more–for business use and use them as another tax write-off as they depreciate

  5. Separate your personal and business finances and accounting

  6. Apply for credit and loans as a business to separate your business and personal debt

Who Is Eligible for an S Corp? IRS Requirements Made Simple

The good news? Most solopreneurs already meet the S Corp eligibility requirements without even trying. The IRS keeps the rules straightforward, and if you're running a solo business, you're already qualified.

Here's what the IRS actually requires:

  • Your business must be based in the U.S.: Any domestic corporation or entity eligible to elect corporate treatment, which includes most LLCs.

  • Maximum of 100 shareholders allowed: Perfect for solos since you're typically the only owner (also called a shareholder), though the IRS permits up to 100 if you ever want to bring on partners.

  • Stick to one class of stock: No complex share structures with different voting rights or profit distributions, which keeps things simple for businesses-of-one.

  • Limit shareholders to individuals, certain trusts, and estates: Partnerships and corporations can't be shareholders, but as a solopreneur, you qualify automatically.

  • Exclude foreign shareholders: U.S. citizens and residents only, which covers most independent professionals.

  • Avoid restricted business types: Certain financial institutions and insurance companies are excluded, but consultants, freelancers, and service providers qualify.

The reality? If you're already running an LLC as a solopreneur, you meet these requirements. Rather than second-guessing the qualifications, check your eligibility instantly and see your potential tax savings in real numbers.

How to Form an S Corp: Steps for Solopreneurs

The path to S Corp status looks straightforward on paper, but in practice, each step comes with its own set of rules, deadlines, and paperwork. Missing just one detail can delay your election, trigger penalties, or leave your business exposed. Here’s what solopreneurs are really up against:

  • Form your LLC first: Establishing a limited liability company (LLC) means navigating your state’s filing system, preparing articles of organization, and appointing a registered agent. Each requirement varies by state, and mistakes can mean rejection or delays.

  • Obtain your EIN within 24 hours: The IRS application seems simple, but one wrong entry locks you into weeks of correspondence by mail. Your employer identification number (EIN) is required before you can even file your S Corp election.

  • Open a dedicated business bank account: Banks require different documentation, and separating finances isn’t optional; it’s what creates the compliance paper trail auditors expect. Without this, your S Corp protections can be challenged.

  • File Form 2553 within 75 days: The IRS gives you a narrow filing window. Miss it, and your S Corp election won’t take effect until the next tax year. Even new businesses must meet this strict deadline. There is an opportunity for a late election, but you must show reasonable cause.

  • Establish payroll processing: Paying yourself a “reasonable salary” isn’t guesswork. It requires benchmarking against your industry, calculating withholdings, issuing W-2s, and filing Form 941 quarterly without error.

  • Create compliance systems: Annual tax returns (Form 1120-S), quarterly estimated payments, and accurate corporate records all need to be maintained. Falling behind risks invalidating your election and undoing your tax advantages.

For solopreneurs, this sequence can feel like running a second business just to keep the first one compliant. That’s why Lettuce automates the entire process: formation, election, payroll, and ongoing compliance, so you stay protected and tax-optimized without the constant paperwork.

S Corp Fees by State: What to Expect

Here’s the part many solopreneurs overlook: while the IRS controls your S Corp election, your state sets its own fees and rules - applicable to business entities in general, whether LLC, corporation, or partnership. These aren’t optional; if you skip them, you risk losing your good standing.

  • California: $800 annual franchise tax (plus a gross receipts fee if your income is high enough).

  • New York: Annual filing fees based on income, anywhere from $25 to $4,500.

  • Texas: No personal income tax, but a state franchise tax kicks in after your business passes a revenue threshold.

  • Other states: Expect anywhere between $50–$300 annually, often tied to annual reports or franchise taxes.

Can You Set Up an S Corp in Any State?

The short answer is yes. Every U.S. state allows you to form an LLC or corporation and then elect S Corp tax treatment with the IRS. But here’s the catch: states don’t all play by the same rules.

  • Separate elections required: Some states, like New York and New Jersey, require an additional state-level S Corp election on top of the federal IRS filing.

  • Extra taxes apply: California, for example, not only charges its $800 franchise tax but also adds a fee based on gross receipts.

  • Simple in most states: Many states automatically honor the federal election, making the process straightforward.

For solopreneurs, this means your S Corp can work in any state, but the cost and compliance details will vary. Check both IRS rules and your state’s rules before filing, so there are no surprises.

S Corp Advantages: Why Solopreneurs Choose This Tax Move

The S Corp benefits for solopreneurs unlock the same strategic moves that big businesses use to optimize their finances. When you stack an LLC's protection with S Corp tax treatment, you're playing in a whole new league.

  • Slash self-employment taxes by thousands: Pay yourself a reasonable salary (subject to payroll taxes), then take remaining profits as distributions that dodge the 15.3% self-employment tax

  • Save serious money at scale: Businesses earning $80,000+ often save over $8,000 annually compared to straight LLC taxation. That's real money back in your pocket.

  • Protect your personal assets: Your LLC foundation provides rock-solid liability protection, while S Corp status delivers tax optimization, with no need to choose between safety and savings.

  • Deduct your health insurance: Write off health insurance premiums for you and your family as a business expense, reducing your taxable income by thousands.

  • Supercharge your retirement savings: Contribute more to plans like a Solo 401(k) as both employer and employee, potentially doubling your annual retirement contributions.

  • Avoid the double-tax trap: Your business profits pass through directly to your personal return with no corporate-level tax and no double hit on your earnings.

  • Time your election strategically: Switch when your annual profits consistently hit $60,000+. That’s the point where tax savings outweigh the additional compliance costs.

S Corp Disadvantages: What to Watch Out For

S Corps come with trade-offs that smart solopreneurs should understand. While the tax savings can be substantial, these considerations help you make the right choice for your business. Here's what you need to know:

  • More paperwork and compliance requirements: S Corps must file Form 1120-S annually, issue K-1s to owners, and follow corporate formalities like maintaining bylaws and holding meetings, adding roughly 10+ hours monthly compared to a basic LLC.

  • Mandatory payroll and reasonable salary obligations: You must pay yourself a "reasonable salary" subject to employment taxes, which means running payroll, withholding taxes, and filing quarterly employment tax forms with the IRS.

  • Diminishing returns for lower-profit businesses: If your annual profits are under $60,000, the tax savings typically don't justify the extra administrative costs and complexity of maintaining S Corp status

  • State-level tax complications: Some states don't recognize S Corp elections or impose additional taxes on S Corps, potentially reducing your federal tax savings depending on where you operate.

The reality? These S Corp disadvantages become completely manageable when you have automated payroll, tax filings, and compliance monitoring working behind the scenes. Calculate your potential savings to see if the benefits outweigh these trade-offs for your specific situation.

Business Insurance for S Corps

Even with the liability shield of an LLC + S Corp, insurance isn’t optional. Your corporate structure protects your personal assets, but it doesn’t pay the bills if something goes wrong.

Here are the most common policies solopreneurs should consider:

  • General liability insurance: Covers accidents, property damage, or lawsuits that hit your business.

  • Professional liability (E&O): A must for consultants, freelancers, and service providers, as it protects you if a client claims mistakes or negligence.

  • Workers’ compensation insurance: Many states require it as soon as you put yourself on payroll, even if you’re the only employee.

  • Business property or equipment coverage: Protects laptops, tools, or equipment your S Corp owns from theft or damage.

Think of insurance as the final layer of protection on top of your S Corp. It keeps your business safe, your compliance intact, and your finances secure when life throws curveballs.

LLC vs. S Corp

It’s not a competition. Now you know you can have one or both. You can enjoy all the legal protections that come with an LLC. But at a certain income level (usually $80k or more), you’ll be missing out on some significant tax advantages without the S Corp.

S Corps are all about the tax advantages. You’re able to leverage the benefits of a full corporation (listed above), normally unavailable to sole proprietorships. We should also highlight that one of the biggest benefits is reducing the 15.3% self-employment tax sole proprietors pay on their full income. With an S Corp, you’re allowed to divide your income into two parts, salary and owner’s Distribution, and you only pay self-employment taxes on the salary portion.

Confused? In an S Corp, you’re essentially two people: the salary-earning employee and the distribution-receiving employer. It’s this setup that can save you thousands in taxes every single year.

C Corp vs S Corp

This one’s a little lopsided. Unless you’re raising venture capital or chasing an IPO, a C Corp just isn’t built for solopreneurs. Here’s why.

C Corps pay taxes twice: once at the corporate level and again when profits are distributed as dividends. That’s the classic “double taxation.” S Corps, on the other hand, skip the corporate tax entirely. Profits pass straight through to your personal return, so you only pay once. Big difference.

C Corps also allow unlimited shareholders, multiple classes of stock, and even global investors. That’s great if you’re scaling a tech company. But as a solo owner, you don’t need that kind of complexity. S Corps keep it simple with one class of stock and up to 100 U.S.-based shareholders, which is more than enough for a business-of-one.

And the real kicker? Money. On $150,000 in profit, an S Corp could save you $10,000 or more each year compared to being taxed as a sole proprietor. Stack that against a C Corp’s double taxation, and it’s not even close.

The takeaway is simple: C Corps are designed for companies serving outside investors. S Corps are designed for profitable solos who want streamlined compliance and serious tax savings.

Frequently Asked Questions (FAQs) About S Corp

Here are the answers to what solopreneurs ask most about turning their single-member LLC into a tax-saving machine.

What’s the downside of an S Corp?

The tradeoff is paperwork. With an S Corp, you’ll need to run payroll, file quarterly reports, and stay on top of compliance deadlines. Miss something, and you risk penalties or even losing your election status. The savings are real, but the admin load is heavier than an LLC or sole proprietorship.

Why would someone start an S Corp?

Simple: tax savings. Once your business income hits around $60k, the ability to split your earnings between salary and owner’s distributions can save you thousands in self-employment taxes every year. Add in deductible benefits like health insurance and retirement contributions, and the S Corp becomes one of the most powerful tools for solopreneurs.

What is a reasonable salary for an S Corp owner?

The IRS expects you to pay yourself what someone else in your role would earn. That means looking at industry averages, your duties, and the time you spend in the business. Pay yourself too little, and the IRS could reclassify your distributions as wages and hit you with back taxes. Pay yourself too much, and you’re just giving away your tax savings. The sweet spot is a salary backed by data; defensible, but not excessive.

Can a single-member LLC become an S Corp for tax purposes?

Yes. A single-member LLC can elect S Corporation tax status by filing IRS Form 2553. Your business stays an LLC legally, but the IRS now taxes it like an S Corp—unlocking tax savings without changing your legal foundation.

When does the S Corp election really pay off for solos?

The tipping point is usually around $60,000 in net profit. Below that, the compliance costs often outweigh the benefits. Once you’re clearing $60k or more, the ability to split income between salary and distributions can save you thousands each year in self-employment taxes.

Is Running an S Corp Actually a Hassle for a Business-of-One?

It can be—payroll, quarterly filings, and compliance monitoring add up. But with the right system, it doesn’t have to be overwhelming. Automation takes care of the paperwork, letting you focus on running your business while still capturing the tax savings.

Ready to Make the System Work for You?

The LLC + S Corp setup isn’t just paperwork; it’s how solopreneurs turn tax rules into real savings. Structure your income the right way, and you keep more of what you earn.

The challenge is staying compliant: payroll, filings, and salary benchmarks that never stop. Get one piece wrong, and the IRS takes back what you saved.

Lettuce can help. Lettuce calculates your salary, files your payroll taxes, and keeps your S Corp compliant, so you save thousands and stay audit-ready. Get started today.