The Benefits of LLCs vs S Corporations: What You Need to Know

There’s a predictable moment in the life of a successful side hustle or small business.

You start making real money, and someone tells you: “You need an LLC.”

Then someone else ups the ante: “And you should definitely elect S corp status. You’ll save a fortune in taxes.”

Maybe. But these are two very different decisions, solving two very different problems. An LLC is primarily about legal liability. An S corporation election is about how your business income is taxed. And neither is automatically a good idea just because your business is making money.

Understanding that distinction can save you thousands of dollars, hours of administrative work, and the unpleasant realization that your brilliant tax strategy barely saved you anything at all.

You Don’t Need an LLC to Have a Business

This is one of the most common misconceptions.

If you earn money independently, you can have a legitimate business without forming an LLC. A sole proprietorship can earn income, deduct legitimate business expenses, purchase business insurance, and report its profit on Schedule C of your tax return.

An LLC, or limited liability company, is a legal entity created under state law. Its primary purpose is right there in the name: limited liability.

If someone sues your business, an appropriately established and maintained LLC can help create a barrier between the business and your personal assets. That may matter considerably if your work exposes you to lawsuits, property damage, injuries, contractual disputes, or other meaningful liability.

What an LLC does not automatically do is lower your taxes.

For a single-member LLC using the default tax treatment, business income generally continues flowing through to the owner’s individual tax return. Forming the LLC itself doesn’t magically transform the tax bill.

That means the first question isn’t:

“Am I making enough money to need an LLC?” Instead, it’s:

“Does my business create enough liability exposure to justify an LLC?”

👉 Five Minute Task: Find your Schedule C. If your tax return has one, you’re already reporting business income, LLC or not.

What Is an S Corp?

This is where people often conflate two separate concepts.

An S corp election changes the tax treatment of your business. Instead of treating all business profit the same way, an S corp generally divides the money you receive into two buckets:

W-2 salary, which is subject to payroll taxes.
Distributions, which are not subject to Social Security and Medicare payroll taxes in the same way.

That second bucket is why S corps get so much attention.

Suppose a business generates $150,000 in profit. As a sole proprietor or single-member LLC under default taxation, the owner may owe roughly $20,000 in self-employment taxes in the example discussed here.

Now suppose the business elects S corp taxation and pays its owner a $90,000 W-2 salary, with the remaining $60,000 paid as a distribution. In this simplified example, payroll-related taxes fall to roughly $13,000.

That’s $7,000 in apparent tax savings.

And this is usually where the S corp sales pitch ends. Unfortunately, the math doesn’t.

The $7,000 Tax Savings That Might Actually Only Be $1,000

S corp status comes with costs.

You need to run payroll. You need appropriate bookkeeping. You have additional tax filings. You may need more help from a tax preparer or accountant.

Those additional compliance costs could easily run $1,500 to $3,000 per year.

Then there’s another factor that gets much less attention: the Qualified Business Income deduction, or QBI.

Depending on your circumstances, business income may qualify for a deduction of up to 20%. Changing how your income is divided between W-2 wages and business distributions can affect that deduction.

So the seemingly obvious $7,000 tax savings can start shrinking.

Take out a couple thousand dollars for payroll, tax preparation, and compliance. Then account for the potential reduction in the QBI deduction. Suddenly, the $7,000 headline number might leave only $1,000 or $2,000 of actual benefit.

And you’ve added more paperwork, more deadlines, more complexity, and more opportunities to make a mistake.

That doesn’t mean S corp status is bad. It means you need to calculate the net benefit, not simply the payroll-tax savings.

When an LLC Makes Sense

An LLC becomes much more compelling when there is a meaningful reason to separate your business liabilities from your personal financial life.

You have real liability exposure – If your business produces something that could injure someone, provides services that could lead to a lawsuit, or otherwise creates meaningful legal exposure, liability protection may be worth the cost and administration.
You own rental real estate – Rental properties create obvious liability risks. If you own multiple investment properties, separate LLCs may also help isolate the liabilities and assets associated with each property.
You want to protect a spouse or partner’s assets – When one spouse or partner operates a business with meaningful liability exposure, creating clearer boundaries between business and personal assets may be valuable.
Your clients expect it – Some companies prefer or require contractors to operate through a business entity. They may also require certain insurance coverage.
You’re considering an S corp election – If your business has become sufficiently profitable that S corp taxation might make sense, an LLC can provide the entity through which you make that election.

The important point is that each of these represents an actual business reason to create the entity. “I heard everyone with a side hustle should have one” isn’t on the list.

When an LLC Probably Isn’t Worth It

An LLC can provide valuable protection, but it also comes with costs, paperwork, and ongoing maintenance. Before creating one, make sure it is solving a problem you actually have.

Your side hustle is small and has little liability exposure – If you’re making $10,000 or $20,000 from a relatively low-risk side business, an LLC may add more expense and administrative work than value. State fees can be significant, too. In Massachusetts, for example, the annual LLC report fee is $500.
You’re doing it to lower your taxes – An LLC by itself doesn’t reduce your tax bill. If tax savings are your primary motivation, forming an LLC isn’t going to accomplish that. An S corp election is a separate decision with its own costs and tradeoffs.
You’re a W-2 employee hoping an LLC will create new write-offs – Creating an LLC doesn’t turn personal expenses into business deductions. And if you already have legitimate expenses associated with a side business, you generally don’t need an LLC to deduct them. A sole proprietor can deduct qualifying business expenses on Schedule C.
You think you need an LLC to get business insurance – You don’t have to form an LLC simply to insure your business. Sole proprietors can purchase business insurance, too. Depending on your risks, insurance may provide some of the protection you’re looking for without creating a separate legal entity. And it isn’t necessarily an either-or choice: some businesses may benefit from both an LLC and appropriate insurance coverage.
You aren’t going to maintain it – An LLC isn’t something you create once and forget about. There are ongoing filing requirements, state fees, and paperwork. If you aren’t prepared to keep the entity properly maintained, think twice before creating one in the first place.

The $100,000 S Corp Rule of Thumb

There is no magical income level where everyone should elect S corp status, but there is a useful point at which it becomes worth doing the math.

A reasonable rule of thumb is to start investigating the S corp option once your business is generating around $100,000 or more in net profit.

Notice the wording: start investigating.

Crossing $100,000 does not mean you should automatically make the election.

At that level, potential payroll-tax savings may finally become large enough to outweigh the costs and complications. But you still have to account for:

The reasonable salary you’ll need to pay yourself
Payroll and tax-preparation costs
Additional administrative requirements
The effect on your QBI deduction
Whether your income is consistent from year to year
The effect on retirement-plan contributions

That last point can be particularly important for high earners.

👉 Five Minute Task: Check Schedule SE. Find your total self-employment tax. If it’s approaching or exceeding $10,000, it may be worth asking your tax professional to model an S corp election.

Don’t Forget Your Solo 401(k)

If you use your business income to make substantial Solo 401(k) contributions, an S corp election deserves additional scrutiny. Why?

Because your retirement-plan contribution calculations can depend on your compensation. Once an S corp divides business earnings between W-2 salary and distributions, the change can potentially reduce how much you are able to contribute to the plan.

Saving a few thousand dollars in payroll taxes becomes much less exciting if the tradeoff interferes with a retirement strategy you value more.

This is exactly why entity and tax decisions shouldn’t be made in isolation. The “best” tax structure on one line of your return may be worse for your overall financial plan.

A Better Way to Make the Decision

Think of this as two separate gates.

🚧 Gate #1: Do I need an LLC?

Ask whether your business has meaningful liability exposure, whether clients require an entity, whether you own assets such as rental real estate that warrant separation, and whether the protection is worth your state’s fees and maintenance requirements.

That is primarily a legal and business-structure decision.

🚧 Gate #2: Should my business elect S corp taxation?

Look at net profit, self-employment taxes, reasonable compensation, QBI, compliance costs, income consistency, and retirement contributions.

That is primarily a tax and financial-planning decision.

Keeping those questions separate immediately eliminates much of the confusion.

Before You Create Anything, Look at Your Tax Return

There are two useful numbers already sitting on last year’s return.

First, look for Schedule C. If you have one, you’re already reporting business income. You do not need an LLC to magically make the business “official.”

Then look at Schedule SE, which reports self-employment tax.

If your self-employment tax is below roughly $10,000, the potential S corp savings may not be substantial enough to justify the added complexity. If that number is becoming significant, particularly alongside business profits approaching or exceeding $100,000, it may be time to ask your tax professional to run an actual comparison.

Not a generic comparison → Your comparison.

How much would you save after payroll expenses? What reasonable salary would you need? How would QBI change? What happens to your Solo 401(k) contributions? What are your state-specific costs?

Those are the numbers that matter.