LLC vs S Corporation: Tax Differences for Business Owners
Quick Answer
An LLC and an S corporation are not the same — especially for taxes.
An LLC is a legal business structure, while an S corporation is a tax election.
You don’t choose one or the other—you form an LLC (or corporation) and then elect to have it taxed as an S corporation if it provides a tax advantage.
The key difference is how income is taxed and how business owners pay themselves.
For some business owners, choosing the wrong tax structure can result in paying more tax than necessary.
If you want to understand how all of these pieces fit together, start with our complete S Corporation tax planning guide.
S Corporation tax planning guide
Reviewed by Steve Madsen, CPA — founder of Madsen and Company with 30+ years of experience helping business owners reduce taxes through proactive tax planning.
Want to See If an S-Corp Would Actually Save You Money?
Most business owners don’t know the real difference until they run the numbers.
In many cases, this happens without the business owner realizing it until it’s too late to fix for that tax year.
Use the S-Corp Tax Savings Calculator to estimate your savings in under 60 seconds.
Then use the S-Corp Salary Calculator to see how your income should be structured.
LLC vs S Corporation (Side-by-Side)
The table below highlights the primary tax and operational differences between an LLC with default taxation and an S corporation election.
| Factor | LLC (Default Taxation) | S Corporation |
|---|---|---|
| Self-employment tax | Generally applies to all profit | Generally applies only to salary portion |
| Owner payroll required | No | Yes |
| Reasonable compensation rules | No | Yes |
| Administrative complexity | Lower | Higher |
| Payroll filings required | No | Yes |
| Potential tax savings | Limited | Potentially significant |
| Best fit | Lower-income or newer businesses | Consistently profitable businesses |
What Is an LLC?
A Limited Liability Company (LLC) is a legal business structure that provides liability protection.
For tax purposes, a single-member LLC is typically treated as a sole proprietorship, and a multi-member LLC is treated as a partnership.
This means:
- All profits are generally subject to self-employment tax
- Income is reported directly on the owner’s tax return
- No payroll is required for the owner
What Is an S Corporation?
An S corporation is not a legal entity — it is a tax election made with the IRS.
An LLC or corporation can elect to be taxed as an S corporation.
Businesses elect S corporation taxation by filing IRS Form 2553. The election allows qualifying businesses to pass income, losses, deductions, and credits through to shareholders while following S corporation tax rules under Subchapter S of the Internal Revenue Code.
With an S corporation:
- The owner is paid a reasonable salary through payroll
- Remaining profits can be taken as distributions
- Distributions are not subject to self-employment tax
According to Steve Madsen, CPA, many business owners benefit from an S corporation structure once income reaches a certain level — but only if it is set up and managed correctly.
The Key Tax Difference
The primary difference comes down to self-employment tax.
Under IRS rules, sole proprietorship and partnership income is generally subject to self-employment tax under IRC Section 1402, while S corporation distributions are generally not subject to self-employment tax when reasonable compensation is properly paid through payroll.
LLC (Default Taxation):
- All business profit is subject to self-employment tax
S Corporation:
- Salary is subject to payroll taxes
- Distributions are not subject to self-employment tax
This is where potential tax savings come from.
The impact of this difference becomes clearer when looking at a simple example:
Example (Simplified)
The following example is simplified and does not include income tax, QBI deductions, state taxes, payroll service costs, or tax preparation fees.
If a business earns $150,000:
LLC (Default):
- Entire $150,000 subject to self-employment tax
S Corporation:
- $80,000 salary → subject to payroll tax
- $70,000 distribution → not subject to self-employment tax
The difference can result in significant tax savings.
How Reasonable Compensation Works in an S Corporation
One of the most important S corporation rules involves reasonable compensation.
If an owner actively works in the business, the IRS generally requires the owner to pay themselves a reasonable salary through payroll before taking additional profits as distributions.
This is important because S corporation tax savings are based on the difference between:
- salary subject to payroll taxes
- and distributions that are generally not subject to self-employment tax
Setting compensation too low can create IRS audit risk, penalties, and payroll tax exposure.
The IRS has repeatedly stated that shareholder-employees who perform substantial services for an S corporation should receive reasonable compensation before profits are distributed.
| Income Type | Typically Subject to Payroll/Self-Employment Tax? |
|---|---|
| S corporation owner salary | Yes |
| S corporation distributions | Generally no |
| Default LLC business profit | Generally yes |
Which One Is Better?
For most business owners, the decision is not really “LLC vs S corporation.” The real question is whether electing S corporation taxation will reduce self-employment taxes enough to justify the additional payroll, compliance, and administrative requirements.
In many cases, the LLC remains the legal structure while the business elects S corporation taxation with the IRS.
The right choice depends primarily on:
- profitability
- consistency of income
- payroll requirements
- compliance costs
- long-term tax planning goals
| Annual Business Profit | Typical S Corporation Consideration |
|---|---|
| Under $50,000 | S corporation often provides limited tax benefit |
| $50,000–$75,000 | May justify evaluation depending on industry and salary requirements |
| $75,000–$100,000 | S corporation savings often become more meaningful |
| Over $100,000 | S corporation planning frequently becomes worthwhile |
CPA Insight from Steve Madsen, CPA
One of the most common mistakes business owners make is assuming an S corporation automatically creates tax savings.
The IRS expects shareholder salaries to be reasonable based on:
- duties performed
- industry standards
- business profitability
- time involved in the business
In practice, the businesses that benefit most from S corporation planning are those with consistent profitability, clean bookkeeping, and properly structured payroll.
The Most Common Mistake
Many business owners make entity decisions based on generalized internet advice without evaluating how the rules apply to their actual income and payroll situation.
The most common LLC vs S corporation mistakes include:
- Electing S corporation status before profits justify the compliance costs
- Waiting too long to elect S corporation taxation and overpaying self-employment taxes
- Failing to run payroll correctly
- Paying shareholder salaries that are unrealistically low
- Mixing personal and business expenses
- Assuming an LLC automatically creates tax savings
In practice, the business structure alone rarely creates savings. The savings come from proper implementation, payroll setup, bookkeeping accuracy, and ongoing tax planning.
According to Steve Madsen, CPA, the businesses that benefit most from S corporation planning are usually those with:
- stable profitability
- clean bookkeeping
- proactive year-round planning
- properly managed payroll
Not Sure If You’re Using the Right Structure?
Most business owners either switch too late—or set up an S-Corp incorrectly.
Schedule a Tax Planning Consultation to review your structure and identify tax-saving opportunities.
When an LLC May Be Better
An LLC may make sense if:
- Your income is relatively low
- You are just starting your business
- You want a simpler structure
- The cost of payroll and compliance outweighs potential tax savings
When an S Corporation May Be Better
An S corporation may make sense if:
- You are consistently profitable
- Your income is high enough to justify payroll
- You want to reduce self-employment taxes
- You are willing to follow compliance requirements
The decision should be based on your income, business activity, and tax planning strategy.
One of the most important ongoing S-Corporation responsibilities involves setting reasonable owner compensation. Businesses considering an S-Corp election should understand how payroll, distributions, and IRS compensation expectations interact before making the election.
Our S-Corp Reasonable Salary Guide provides practical compensation benchmarks and planning considerations.
When and How to Elect S Corporation Status
Businesses typically elect S corporation taxation by filing IRS Form 2553 with the IRS.
In most cases, the election must be filed:
- within 2 months and 15 days after the start of the tax year the election should take effect
- or during the prior tax year
Missing the deadline can delay potential tax savings unless the business qualifies for late election relief.
Businesses should also understand that electing S corporation taxation creates ongoing payroll, bookkeeping, and compliance responsibilities that must be maintained throughout the year.
| Action | Typical Timing |
|---|---|
| Form LLC or corporation | Any time during the year |
| File Form 2553 | Within 2 months and 15 days of tax year start |
| Begin payroll | During the tax year |
| Issue W-2 | By January 31 |
What Should You Do Next?
If you’re trying to decide between an LLC and S-Corp, start with the step that fits your situation:
• Want to estimate your potential savings → S-Corp Tax Savings Calculator
• Not sure what your salary should be → S-Corp Salary Calculator
• Ready to reduce your tax bill → Schedule a Tax Planning Consultation
Each step helps you move forward based on your numbers.
Why This Decision Matters
Choosing between an LLC and S corporation directly impacts:
- How much you pay in taxes
- How you pay yourself
- Your compliance requirements
- Your long-term tax strategy
Once the year is over, it is often too late to change the tax outcome for that year.
How Madsen and Company Approaches It Differently
At Madsen and Company, entity selection is part of a broader tax planning strategy.
The goal is not just to choose a structure — it is to:
- Reduce taxes legally
- Align structure with income
- Adjust as the business grows
- Avoid common mistakes
This planning-first approach ensures the structure supports long-term financial outcomes.
These decisions are part of tax planning, not tax preparation — and making them at the right time is what creates the opportunity for tax savings.
LLC vs S Corporation: Which Is Right for You?
There is no one-size-fits-all answer.
The right choice depends on:
- Your income level
- Your business activity
- Your long-term goals
What matters most is making the decision before year-end, when it can still impact your taxes.
Reviewed by Steve Madsen, CPA — founder of Madsen and Company with over 30 years of experience advising business owners and real estate investors on proactive tax planning strategies.
Get a Clear Answer Based on Your Numbers
If your business income is above $75,000, there’s a strong chance this decision is impacting your taxes right now.
We’ll show you:
- Whether an S-Corp actually makes sense
- How much you could realistically save
- What your salary should be
Turn this into a clear plan.
For a full breakdown of how S-Corp strategies work together, review our S Corporation tax planning guide.