LLC vs S-Corp Tax Calculator
Business Income Details
How It Works
The calculator shows how S-Corp election can reduce your self-employment tax burden by splitting income into salary (subject to payroll taxes) and distributions (not subject to payroll taxes).
Self-employment tax rate is 15.3% (Social Security 12.4% + Medicare 2.9%) on net earnings for LLCs. S-Corps allow you to pay yourself a reasonable salary subject to payroll taxes and the rest as distributions that aren't taxed.
When you hear "LLC disadvantages", the first thing that comes to mind is the promise of limited liability paired with simple paperwork. But that promise hides a couple of costly realities that many new owners overlook. Below we unpack the two biggest downsides-tax and compliance-and show how they affect cash flow, paperwork, and long‑term flexibility.
What an LLC Is (and Isn’t)
Limited Liability Company (LLC) is a business structure that blends the liability protection of a corporation with the tax flow of a partnership. In practice, members (owners) are shielded from most personal claims against the business, yet the entity itself is not taxed as a separate corporate body in most U.S. jurisdictions. Instead, profits "pass through" to members' personal tax returns.
Disadvantage #1: Self‑Employment Tax and Payroll Costs
Self-Employment Tax is the combination of Social Security and Medicare taxes that the IRS treats as a 15.3% levy on net earnings of self‑employed individuals. Because an LLC’s default tax treatment is that of a partnership, members who actively work in the business are considered self‑employed. This means every dollar of profit is hit by the 15.3% rate, regardless of whether the member takes a salary or simply draws cash.
Contrast that with an S‑Corporation, where owners can split income into a reasonable salary (subject to payroll taxes) and a distribution that isn’t. By opting for S‑Corp election, many small businesses shave off 7‑9% of payroll taxes each year. The trade‑off is extra paperwork: you must run a payroll service, file quarterly payroll tax returns, and maintain detailed records of salaries versus distributions.
For a startup pulling in $120,000 of profit, the extra self‑employment tax can add up to $9,180-money that could otherwise fund product development or marketing. That hidden cost is often the first financial shock for founders who chose an LLC for its simplicity.
Disadvantage #2: State Filing Fees and Ongoing Compliance
State Filing Fees vary widely, ranging from a modest $50 in some states to over $500 in high‑cost jurisdictions like California. On top of the initial formation fee, most states require an annual report or franchise tax. For example, California imposes a minimum $800 franchise tax each year, regardless of profit.
These recurring costs aren’t just cash drains; they also bring administrative burdens. Many states demand an updated Operating Agreement every few years, along with member lists, registered agent information, and sometimes even a statement of purpose. Miss a deadline, and the state may levy penalties or even dissolve the LLC.
When you add up filing fees, franchise taxes, and compliance software subscriptions, a typical LLC can spend $1,000‑$2,000 annually just to stay in good standing. For a solo‑owner making $50,000 in revenue, that’s a 2‑4% slice of the top line.

Additional Pain Points Worth Mentioning
- Personal Guarantee may still be required when you apply for a business loan, meaning lenders can chase your personal assets despite the LLC structure.
- Pass-Through Taxation simplifies filing but can push you into a higher personal tax bracket, especially if you’re already earning a salary elsewhere.
- Business Credit building is slower for LLCs because many lenders view them as less established than corporations.
- Series LLC offers asset protection for multiple ventures under one umbrella, but not all states recognize it, limiting its usefulness.
Quick Comparison: LLC vs. S‑Corporation vs. Sole Proprietorship
Feature | LLC | S‑Corporation | Sole Proprietorship |
---|---|---|---|
Liability Protection | Members generally not personally liable for business debts. | Shareholders protected; similar to LLC. | No protection; personal assets at risk. |
Tax Treatment | Pass‑through; subject to self‑employment tax. | Pass‑through; ability to split salary & distribution. | Pass‑through; all earnings taxed as personal income. |
State Fees | Formation + annual report/franchise tax. | Similar filing fees; may have extra corporate tax. | Usually none (except business license). |
Compliance Complexity | Annual report, operating agreement updates. | Payroll, corporate minutes, stricter IRS scrutiny. | Minimal paperwork. |
Best For | Small teams wanting liability protection without corporate formalities. | Businesses that can benefit from salary‑distribution tax split. | Solo freelancers with low revenue and no liability concerns. |
When an LLC Still Makes Sense
If your venture relies heavily on protecting personal assets-say you’re a consultant handling client data or a retailer with inventory-you’ll likely value the liability shield more than the extra tax cost. Additionally, if you anticipate bringing in investors who prefer a clear legal entity, an LLC’s flexible ownership structure can be a selling point.
For many service‑based startups, the trade‑off works: the cost of self‑employment tax is offset by the ability to deduct a wide range of business expenses, from home‑office utilities to health‑insurance premiums. Just be prepared to budget for the ongoing compliance fees.

Actionable Checklist for New LLC Owners
- Calculate the expected Self-Employment Tax impact on your net profit and compare it to a potential S‑Corp election.
- Research your state’s State Filing Fees and annual franchise tax obligations.
- Draft a solid Operating Agreement that outlines member roles, profit distribution, and procedures for adding or removing members.
- Set up a payroll system if you decide to elect S‑Corp status later; keep clear records of salary versus distributions.
- Monitor credit building: open a business bank account, obtain a D‑U‑N‑S number, and use the LLC for all vendor payments.
- Schedule annual compliance reviews-mark calendar reminders for filing deadlines to avoid penalties.
Bottom Line
Choosing an LLC is rarely a mistake, but it comes with two main headaches: the ever‑present self‑employment tax bite and the steady stream of state fees and paperwork. Understanding these costs up front lets you price your services correctly, allocate cash for compliance, and decide whether an S‑Corp election or a different structure could save you money.
Frequently Asked Questions
Can I switch from an LLC to an S‑Corporation later?
Yes. Most states let you file Form 2553 with the IRS to elect S‑Corp status. You’ll still owe the initial LLC formation fees, but you can start taking advantage of salary‑distribution tax splits after the election is approved.
Do all states charge an annual franchise tax?
No. Some states, like Delaware and Wyoming, have very low or no franchise tax. Others, like California and New York, impose hefty minimum fees. Always check your specific state’s requirements before forming.
Will an LLC protect me if I personally guarantee a loan?
If you sign a personal guarantee, lenders can still pursue your personal assets despite the LLC shield. The guarantee overrides the limited‑liability protection for that specific debt.
Is the operating agreement required in every state?
Most states don’t mandate filing the agreement with the state, but they expect you to have one on hand for internal governance and for potential audits. Some states, like New York, require you to publish a notice of your LLC’s formation, effectively making the agreement public.
How does a Series LLC differ from a regular LLC?
A Series LLC lets you create multiple “series” under a single legal entity, each with its own assets and liabilities. It can simplify managing several related businesses, but not all states recognize this structure, which can limit its protective benefits.