You are ready to start a business. You have the idea, the plan, maybe even the first client lined up. Now you need to pick a business structure, and you are stuck between two options everyone has an opinion about: the LLC and the S corp.
Most of the advice online is incomplete. The real answer depends on how much money you expect to make, how you want to be taxed, and how much administrative overhead you can handle.
This guide breaks down the difference in plain language and shows you the option most business owners actually need -- which is a combination of both.
What Is an LLC?
An LLC -- a limited liability company -- is a business structure created under state law. It separates your personal assets from your business debts. If your business gets sued or cannot pay its bills, creditors generally cannot come after your house, car, or personal bank accounts.
That separation is called limited liability, and it is the main reason most small business owners form an LLC.
From a tax perspective, an LLC is flexible. A single-member LLC is taxed as a sole proprietorship by default. A multi-member LLC is taxed as a partnership. In both cases, the business itself does not pay income tax. Profits pass through to the owners' personal tax returns. This is called pass-through taxation.
An LLC is governed by an operating agreement -- a document that spells out ownership, decision-making, and what happens if an owner leaves. You do not need one to form the LLC, but you need one to run it properly.
What Is an S Corp?
Here is where most people get confused. An S corp is not a type of business entity. It is a tax election.
You do not file paperwork with the state to create an S corp. You form an LLC or a corporation under state law, then file Form 2553 with the IRS to elect S corporation tax treatment. This is different from a C corp, where the business pays its own income tax and owners pay again on dividends -- a problem called double taxation. The S corp avoids that entirely.
Why does this matter? Because an S corp changes how you pay yourself and how much you owe in self-employment tax. Instead of paying self-employment tax on all your business profits, you pay yourself a reasonable salary (subject to payroll taxes) and take remaining profits as distributions, which are not subject to self-employment tax.
That difference can save you thousands of dollars a year -- but only if your business makes enough to justify the added complexity.
Like a standard LLC, an S corp uses pass-through taxation. The business does not pay federal income tax at the entity level. Profits flow through to the owners' personal tax returns.
Key Differences Between an LLC and an S Corp
Here is a side-by-side comparison of the features that matter most.
| Feature | LLC (Default Tax Treatment) | S Corp (Tax Election) | |---|---|---| | Entity type | State-law entity | Tax classification (applied to an LLC or corporation) | | Limited liability | Yes | Yes | | Taxation | Pass-through (sole prop or partnership) | Pass-through (S corp rules) | | Self-employment tax | Paid on all net earnings | Paid only on salary, not on distributions | | Owner requirements | No limit on number or type of owners | Max 100 shareholders; must be U.S. citizens or residents; one class of stock only | | Payroll requirement | None (unless you have employees) | Must run payroll and pay yourself a reasonable salary | | Formalities | Minimal -- operating agreement recommended | More formal -- payroll, quarterly filings, reasonable compensation rules | | Flexibility | High -- customize profit sharing, management structure | Lower -- restricted by IRS rules on ownership and distributions | | Cost to maintain | Lower | Higher (payroll service, additional tax filings) |
The biggest practical difference is self-employment tax. If your LLC earns $150,000 in profit, you pay self-employment tax (15.3%) on all of it -- about $23,000.
If the same business is taxed as an S corp and you pay yourself a salary of $80,000, you pay payroll taxes only on the $80,000. The remaining $70,000 in distributions is not subject to self-employment tax. That is roughly $10,000 in annual savings.
Those numbers get attention. But there is a catch.
When an LLC Makes More Sense
A standard LLC with default tax treatment is the right choice for most new businesses. Choose the LLC if:
Your business is new or still growing. If you are not yet earning consistent profits above $50,000 to $60,000, the S corp tax savings will not outweigh the costs of running payroll and filing an additional tax return (Form 1120-S).
You want maximum simplicity. An LLC with default taxation is the simplest business structure to maintain. You report business income on your personal tax return (Schedule C for single-member LLCs). No separate corporate tax return. No payroll to run.
You need flexible ownership. If you want foreign investors, more than 100 owners, or multiple classes of ownership with different economic rights, the S corp election will not work.
You plan to reinvest most of your profits. The self-employment tax savings of an S corp only matter on the spread between your salary and your total profits. If you are not taking significant money out, the benefit is minimal.
When an S Corp Makes More Sense
The S corp election starts to pay off when your business hits a certain income threshold. Consider the S corp if:
Your net profits consistently exceed $80,000 to $100,000. Below that range, the self-employment tax savings are eaten up by payroll costs and higher accounting fees. Above that range, the math works in your favor.
You are a service-based business owner. Consultants, freelancers, attorneys, accountants, and other professionals benefit the most from S corp taxation. The income is high, overhead is low, and there is a clear spread between a reasonable salary and total profits.
You want to reduce your self-employment tax burden. If you are paying $15,000 to $20,000 a year in self-employment tax and could cut that by half through payroll, the savings are real and recurring.
You are comfortable with more formalities. An S corp requires payroll (including withholding and quarterly filings), a reasonable salary, and a separate corporate tax return each year.
Can You Have Both?
Yes. And this is the answer that most small business owners actually need.
The most common structure for profitable small businesses is an LLC that elects S corp tax treatment. You get the limited liability protection and flexibility of an LLC under state law, combined with the self-employment tax savings of S corp treatment under federal tax law.
Here is how it works:
- Form an LLC under your state's laws. In Connecticut, you file a Certificate of Organization with the Secretary of the State.
- Draft an operating agreement that governs how the business runs.
- File Form 2553 with the IRS to elect S corporation tax status. You can do this when you form the LLC or later (with some timing restrictions).
- Set up payroll and start paying yourself a reasonable salary.
- Take additional profits as distributions that are not subject to self-employment tax.
You still have an LLC. You still operate under your operating agreement. But for income tax purposes, the IRS treats you as an S corp. You file Form 1120-S each year, issue yourself a W-2, and receive a K-1 for distributions.
This is what most business law attorneys and CPAs recommend for profitable owner-operated businesses. It is clean, tax-efficient, and well-understood by the IRS.
How to Decide: A Simple Framework
If you are trying to choose between an LLC and an S corp, work through these questions:
1. How much net profit does your business generate? Under $60,000 -- start with a standard LLC. Revisit S corp status when your income grows.
2. How much of that profit do you take out personally? S corp savings only apply to distributions above your salary. If you reinvest most of your profit, the benefit shrinks.
3. Are you willing to run payroll? S corp requires it. Payroll services cost $500 to $2,000 per year for a single-employee business.
4. What would a reasonable salary be for your role? The IRS requires S corp owner-employees to pay themselves what someone in their position would earn in the market. If your total profit is $100,000 and a reasonable salary is $90,000, there is little room for tax-free distributions.
5. Do you meet S corp eligibility requirements? You need 100 or fewer shareholders, all U.S. citizens or resident aliens, and one class of stock.
If your net profit clears $80,000 to $100,000 and you meet these criteria, the LLC with S corp election is likely your best move. If not, the standard LLC is the right starting point.
Connecticut-Specific Considerations
If you are forming your business in Connecticut, here are a few state-specific details.
Filing fees. Forming an LLC in Connecticut costs $120 (Certificate of Organization). A domestic corporation costs $250 (Certificate of Incorporation). If you form an LLC and elect S corp treatment, you pay the LLC filing fee.
Business Entity Tax. Connecticut imposes a $250 biennial Business Entity Tax on all LLCs, regardless of how they are taxed.
Pass-through entity tax. Connecticut has a pass-through entity tax (PET) that applies to S corps and partnerships. Owners receive a corresponding credit on their personal Connecticut income tax returns, but the entity pays the tax up front, which affects cash flow.
Annual report. Connecticut LLCs must file an Annual Report ($80 filing fee). Miss it and the state can dissolve your LLC.
Factor these costs into your decision when comparing the total annual cost of a standard LLC versus an LLC with S corp treatment.
Next Steps
Choosing the right business structure is one of the most important decisions you make as a business owner. Get it right and you save money, protect your personal assets, and position your business for growth. Get it wrong and you overpay on taxes -- or worse, expose yourself to liability you thought you had avoided.
If you are not sure which structure fits your situation, schedule a consultation. We help small business owners across Connecticut, New York, and Massachusetts set up the right structure from the start -- or restructure when they have outgrown the original setup. Learn more about our entity formation and business law services.
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