Should I be an S-corp, LLC, or sole proprietor for tax purposes as a small business owner?
By Fidelis Solutions · Published May 31, 2026
Most business owners assume their entity choice is locked in. It isn't.
A sole proprietor earning $150,000 annually might eliminate $15,000 in self-employment tax by converting to an S-corp — but only if the structure is filed correctly and IRS wage-reasonableness rules are followed.
That number isn't hypothetical. Under 26 USC §1401, sole proprietors pay self-employment tax on 92.35% of net profit. On $150,000 of net income, that's a significant tax obligation that runs on top of your federal income tax, every single year, automatically — because of a formation decision you may have made without ever running the numbers.
Here's what most business owners don't realize. The entity you operate under isn't just a legal label. It's a tax instruction. It tells the IRS exactly how to calculate your self-employment liability, how to schedule your estimated quarterly payments, and how to audit your compensation if you ever get flagged. The structure you chose on day one — or the one you defaulted into because you never chose at all — is actively shaping your tax bill right now.
Sole proprietorship. Single-member LLC. S-corporation. These three structures produce three different tax outcomes on identical income. The difference between them can be tens of thousands of dollars annually — and almost no one sits down and models that comparison before they start doing business.
That's exactly what this video is going to do.
Fidelis Tax & Accounting, under Fidelis Solutions, pairs a human tax strategist with AI-driven cash flow modeling so you can see the precise tax consequence of each structure before you commit — or before you convert. You won't need to guess. You'll see the actual numbers for your actual income, mapped against the statutory thresholds that govern each entity type.
By the end of this video, you will understand how each structure is taxed, where the real savings opportunities live, where the IRS draws the line, and how to know which entity is right for your specific situation.
Let's start at the foundation.
Let's start with the most common structure — and the most expensive one that most business owners don't realize is costing them money.
If you operate as a sole proprietor, the IRS treats your business income as your personal income. Every dollar of net profit flows directly onto Schedule C of your Form 1040. That sounds simple. And it is simple. But simple has a price.
Under 26 USC Section 1401(b), sole proprietors pay self-employment tax on 92.35% of their net profit. That 92.35% figure exists because you're allowed to deduct half of your self-employment tax before calculating the base — but you still owe 15.3% on that adjusted amount. That breaks down as 12.4% for Social Security and 2.9% for Medicare. And once your net earnings exceed $176,100 in 2026 — the Social Security wage base updated under IRS Rev. Proc. 2025-32 — the Social Security portion stops, but Medicare does not. High earners also face an additional 0.9% Medicare surtax under IRC Section 3101(b)(2) once income exceeds $200,000 as a single filer.
Here's what that looks like in real numbers.
Say you're a consultant — let's call her Maria. Maria runs her own marketing consultancy. She brings in $200,000 in gross revenue. After legitimate business deductions, her net profit sits at $150,000. As a sole proprietor, Maria calculates self-employment tax on 92.35% of that — which is $138,525. At 15.3%, Maria owes $21,194 in self-employment tax alone. That number sits on top of her federal income tax liability. It sits on top of her state income tax. It is not a deduction. It is not optional. It is the cost of the structure she chose — or more accurately, the structure she defaulted into by never filing anything different.
Now here's the part that changes the conversation.
An S-corporation shareholder who owns 100% of the same business does not pay self-employment tax on all $150,000 of net profit. Under IRC Section 1361 and the pass-through mechanics of IRC Section 1366(a), an S-corp owner splits income into two buckets: a W-2 salary paid to themselves as an employee, and distributions paid to themselves as a shareholder. Self-employment tax applies only to the W-2 wages. Distributions are not subject to self-employment tax under the S-corp structure.
So if Maria had elected S-corp status by filing Form 2553 — and if she paid herself a reasonable W-2 salary of, say, $80,000 — she would only owe self-employment tax, in the form of FICA payroll taxes, on that $80,000. The remaining $70,000 flows to her as a distribution. That distribution is taxed as ordinary income, but it carries zero self-employment tax. On $70,000 of distributions, at a 15.3% rate, Maria retains roughly $10,700 that the sole proprietorship structure would have taken. IRS Rev. Proc. 2025-32 Section 3.02 confirms that this income-splitting strategy is statutorily valid when the W-2 salary meets the reasonable compensation threshold.
That one structural decision — made once, filed correctly — changes Maria's annual tax liability by five figures.
And this is exactly where Fidelis Tax & Accounting works differently than a standard CPA engagement. Fidelis Solutions doesn't just tell you the rule. Fidelis Solutions runs your actual numbers — your revenue, your deductible expenses, your state of domicile, your projected growth — through an AI-driven cash flow model so you see the precise dollar consequence of each structure before you file anything. A human tax strategist walks you through the output. The AI amplifies what that strategist sees. Together, they produce a recommendation that is specific to your situation — not a general answer pulled from a flowchart.
Most business owners have never had access to that kind of analysis. Fidelis Solutions exists to change that.
Now, if sole proprietorship is the most expensive default, the LLC is the most misunderstood middle ground — and that misunderstanding costs business owners real money every single year.
Here's what most people get wrong about an LLC. The LLC itself is not a tax classification. It is a legal structure. The IRS does not recognize the LLC as a separate tax entity by default. What that means in plain language is this: when you form an LLC with one member, the IRS automatically treats it as a sole proprietorship for tax purposes. You still file Schedule C. You still pay self-employment tax on 92.35% of your net profit under 26 USC Section 1401. The liability shield is real — but the tax treatment is identical to what you had before you formed the LLC.
This surprises a lot of business owners. They spend money forming the LLC, they feel like they've done something significant, and technically they have — from a legal standpoint. But from a tax standpoint, nothing has changed unless they take one additional step.
That step is Form 8832.
Form 8832 is the IRS Entity Classification Election. It gives an LLC the ability to choose how it wants to be taxed. A single-member LLC can elect to be taxed as a C-corporation. A multi-member LLC can elect corporate taxation or remain a partnership by default. And critically — an LLC can also use Form 8832 in conjunction with Form 2553 to elect S-corporation tax treatment. That election changes everything about how your income is categorized, how your quarterly estimated taxes are calculated, and what your total self-employment tax obligation looks like at year-end. The legal authority for this election lives in 26 USC Section 1363(b) and the IRS Form 8832 Instructions.
Now let's talk about what that election actually does to your tax picture — because this is where the numbers get real.
An LLC taxed as a disregarded entity passes all profit directly to the owner. That profit hits the owner's personal return on Schedule C, and every dollar of net profit is subject to both income tax and self-employment tax. At 15.3% self-employment tax on net earnings — the combined employee and employer share under 26 USC Section 1401(b) — a business generating $120,000 in profit produces roughly $16,955 in self-employment tax alone, before federal income tax is calculated.
An LLC that elects S-corporation treatment changes the structure of that income. The owner becomes a shareholder-employee. Business profit is split between a W-2 salary and a distribution. Only the W-2 salary is subject to FICA payroll taxes. The distribution passes through to the owner's personal return under IRC Section 1366(a) and is taxed at ordinary income rates — but it is not subject to self-employment tax. That single structural difference is where the 15 to 25 percent annual self-employment tax reduction becomes possible, as referenced under IRS Rev. Proc. 2025-32 Section 3.02.
But here is where business owners have to be careful. The LLC's tax-neutral nature is a feature — it gives you flexibility. It also gives you the ability to make the wrong election for your income level, your state, and your business structure. A multi-member LLC has default partnership taxation under 26 USC Section 1363. Partners in that structure receive a Schedule K-1, not a W-2. Their distributive share of self-employment income is still subject to self-employment tax unless the entity is restructured. Choosing the wrong default — or failing to make an affirmative election on Form 8832 — leaves money on the table that the law would otherwise allow you to keep.
This is precisely why Fidelis Tax & Accounting does not hand clients a checklist and tell them to pick a structure. Fidelis Solutions runs each client's actual income, projected profit, estimated quarterly payments, and state tax obligations through AI-driven cash flow modeling before any recommendation is made. The model shows the precise tax consequence of each classification — disregarded entity, partnership, S-corp — side by side, in dollar terms, before you file a single form. A human tax strategist at Fidelis Solutions then sits with that output and walks you through what the numbers mean for your specific situation.
The LLC is a powerful tool. But the tool does not do the work on its own. The election determines everything. And the election has deadlines.
Coming up next, we are going to look at the S-corp election specifically — Form 2553, the reasonable salary requirement, and the IRS audit exposure that comes when that salary is structured incorrectly. Because the S-corp is the structure with the highest upside — and the highest cost when it is done wrong.
So now you understand what a sole proprietorship costs you and why an LLC alone doesn't automatically fix the problem. The structure that actually changes the math — for the right business owner, at the right income level — is the S-corporation. And most people either dismiss it too quickly or misuse it entirely.
Here is what an S-corp actually does. It allows you, as the owner, to split your business income into two separate streams. The first stream is a W-2 salary that you pay yourself as an employee of your own company. The second stream is a distribution — profit passed through to you as a shareholder. Under IRC §1366(a), that distribution passes through to your personal return. But here is the critical distinction: only the W-2 wage portion is subject to self-employment and payroll taxes. The distribution is not.
That split is where the tax savings live.
A sole proprietor earning one hundred fifty thousand dollars in net profit pays self-employment tax on ninety-two point three five percent of that amount under 26 USC §1401(b). That produces a self-employment tax bill approaching twenty thousand dollars before federal income tax even enters the picture. An S-corp owner earning the same one hundred fifty thousand dollars can, under the right structure, designate a reasonable W-2 salary of, say, seventy-five thousand dollars — and take the remaining seventy-five thousand as a distribution. Payroll taxes apply only to the wage portion. The distribution moves to the owner's personal return through Schedule K-1 with no self-employment tax attached.
That structure, modeled correctly, can reduce annual self-employment tax liability by fifteen to twenty-five percent — a figure cited in IRS Rev. Proc. 2025-32 §3.02 — and for a business producing consistent six-figure net income, that difference compounds significantly over years.
But the IRS is not unaware of this strategy. The agency actively monitors S-corp returns where owner W-2 wages appear unusually low relative to business profits. The challenge is documented under IRC §1366(d)(1) and IRS Notice 2015-14. If the IRS determines that an owner is paying themselves a token salary to push the bulk of income into untaxed distributions, the agency can reclassify those distributions as wages, assess back payroll taxes, and impose penalties. The IRS calls this the reasonable compensation standard, and it does not have a fixed dollar threshold.
What the IRS looks at is whether your W-2 wage reflects what you would pay a third party to perform the same services in the open market. If you are a consultant generating two hundred thousand dollars in revenue through your own expertise, a fifteen-thousand-dollar salary is not defensible. A salary anchored to industry data, your hours, and your role inside the business — documented and supported — is.
This is where Fidelis Tax & Accounting does work that generic tax software cannot. Fidelis Solutions uses AI-driven cash flow modeling to identify the defensible wage midpoint for your specific business — not an industry average pulled from a generic table, but a figure calibrated to your revenue, your role, your geography, and your net income trajectory. A human tax strategist then reviews that model and sets the salary figure you can stand behind if the IRS ever asks.
The S-corp election itself requires Form 2553, filed with the IRS. Timing matters. A late Form 2553 filing can disqualify the election for the current tax year, meaning you would pay the full self-employment tax load on income you could have sheltered. Fidelis Solutions tracks those deadlines in its client workflows so the election lands correctly the first time.
There is also the question of cost. S-corps carry real administrative overhead — payroll processing, separate business bank accounts, quarterly payroll tax filings, potential state franchise taxes, and annual compliance costs that Fidelis Solutions estimates range from five hundred to three thousand dollars per year depending on jurisdiction and payroll complexity, consistent with Secretary of State filing requirements across most states. If your net business income sits below forty thousand dollars, the administrative cost may fully offset the tax savings. If your net income is above eighty thousand and climbing, the S-corp structure almost certainly produces a net benefit when modeled properly.
That threshold calculation is not something you should estimate on your own. The right answer depends on your state, your income mix, your spouse's employment status if you file jointly, and your retirement contribution strategy — because S-corp W-2 wages also determine your allowable Solo 401(k) contribution limit under IRC §404(a)(12) and IRS Rev. Proc. 2025-32.
The point is this: the S-corp is not a workaround. It is a fully statutory structure designed to give business owners access to the same payroll tax treatment that employees of large corporations have always had. Used correctly, with documented reasonable compensation and timely filings, it is one of the most durable tax planning tools available to a self-employed professional.
Used carelessly — low wages, no documentation, late elections — it becomes an audit flag instead of a benefit.
Fidelis Solutions exists to make sure your entity structure is built on the first set of facts, not the second.
Here is what every business owner watching this video needs to walk away knowing: your entity structure is a tax decision, not just a legal one, and the wrong default costs you real money every single year.
A sole proprietor earning $150,000 in net profit pays self-employment tax on 92.35% of that income under 26 USC §1401(b). An S-corp owner at the same income level — with a properly documented reasonable salary on file and a timely Form 2553 election — may reduce that self-employment tax exposure by fifteen to twenty-five percent annually, as modeled against the wage benchmarks referenced in IRS Rev. Proc. 2025-32 §3.02. An LLC sitting on its default classification captures none of that benefit unless the owner makes an affirmative tax election on Form 8832 or couples the LLC with an S-corp election on Form 2553.
The structure does not choose itself. The IRS does not remind you to optimize. And the difference between the right entity and the wrong one is not theoretical — it shows up as a number on your quarterly estimated payment, on your Schedule C, on your W-2, and ultimately on what you keep.
Fidelis Solutions pairs a human tax strategist with AI-driven cash flow modeling so you can see those numbers — your numbers — before you file a single form. Not guesswork. Not generic advice. Statutory analysis applied to your specific income, your state obligations, and your margin.
The next step is a tax entity review. Fidelis Solutions will model your current structure against the alternatives, flag any reasonable-salary exposure under IRC §1366(d)(1), and show you the precise cost of staying where you are. [Founder Name] and the Fidelis Tax & Accounting team built this process so that the complexity of entity law does not fall entirely on your shoulders — you bring your numbers, and you walk away with a clear answer.
Go to Fidelis dot solutions slash intake, or find the link in the description below. The review is structured, it is specific, and it starts with your actual situation. We will see you there.
Here is what you should do next.
You now know that a sole proprietor earning $150,000 pays self-employment tax on 92.35% of that net profit under 26 USC §1401(b). You know that an S-corp election filed on Form 2553 allows you to split income between W-2 wages and distributions, and that the IRS will scrutinize that split under IRC §1366(d)(1) if your salary is unreasonably low. You know that an LLC is tax-neutral by default, and that Form 8832 is the instrument that changes its tax treatment entirely. What you may not know yet is exactly where your business falls inside those rules — and what the specific dollar difference looks like for your income, your state, and your current structure.
That is the conversation Fidelis Tax Strategy exists to have with you.
When you book an entity review with Fidelis Solutions, a human tax strategist sits down with your actual numbers. Not a template. Not a generic recommendation. Your net profit, your W-2 wage benchmark, your state's franchise tax and annual filing requirements, your quarterly estimated payment schedule — all of it modeled against each entity structure so you can see the outcome before you make the decision. AI analysis runs alongside that strategist, pulling statutory thresholds from IRS Rev. Proc. 2025-32 and current state codes, so nothing gets missed and nothing gets assumed.
Most people understand that tools like AI can help them make better decisions. What most people have never had is a professional standing beside them while those tools are actually running — someone who can translate the output into a plan that holds up under IRS review. Fidelis Solutions builds that pairing deliberately. The strategist brings judgment. The analysis brings precision. You bring your business. Together, the outcome is expert-level — even if this is the first time you have ever had to navigate entity selection.
Your entity choice is not locked in. And if you have been operating as a sole proprietor or an informally structured LLC without a deliberate tax strategy behind it, there is a very real probability that you are leaving money on the table every single year — not because you made a wrong decision, but because no one showed you the right one.
Go to Fidelis dot solutions slash intake. Book your entity review. Tell the team where your business stands today — your structure, your income range, your state. A strategist will walk through every scenario with you and show you the precise tax consequence of each path forward.
The URL one more time: Fidelis dot solutions slash intake. The link is in the description.
The structure you choose today will govern every tax return, every quarterly payment, and every audit interaction you face for years to come. Make that choice with data behind it.