LLC vs S-Corp: How US Founders Should Choose for Tax

For US founders, "LLC vs S-Corp" is usually the wrong way to frame the question — an LLC is a legal entity, while an S-Corp is a tax election that an LLC (or a corporation) can choose. The real decision is whether your LLC should be taxed in its default way, or elect S-Corporation status to potentially reduce self-employment tax. As a rough guide, the S-Corp election starts to make sense once your business profit is consistently high enough that the payroll-tax savings outweigh the added cost and complexity of running payroll and filing a corporate return — but the right answer depends on your numbers and should be confirmed with a CPA or EA.

LLC and S-Corp are not the same kind of thing

This is the single most important point, and the source of most confusion.

• An LLC (Limited Liability Company) is a business structure created under state law. It gives you liability protection and a flexible legal wrapper. The IRS does not have a specific "LLC" tax category.
• An S-Corporation is a federal tax classification. It is something an eligible entity elects by filing the right form with the IRS.

So a single-member LLC is taxed by default as a disregarded entity (its income flows onto the owner's personal return), and a multi-member LLC is taxed by default as a partnership. That same LLC can instead elect to be taxed as an S-Corp if it meets the eligibility rules. You are not choosing between two entities — you are choosing how your entity is taxed.

How a default LLC is taxed

Under default tax treatment, an LLC is a pass-through: the business itself generally pays no federal income tax, and profits pass through to the owners, who report them on their personal returns.

The catch for active owners is self-employment tax. As an owner actively working in a default LLC, your share of the business's net profit is typically subject to self-employment tax (which funds Social Security and Medicare) in addition to ordinary income tax. That self-employment tax applies to essentially all of your net profit, which is exactly the pressure point the S-Corp election addresses.

The upside of the default LLC is simplicity: no separate corporate return for a single-member LLC, no payroll requirement for the owner, and minimal administrative overhead. For many early-stage or lower-profit businesses, that simplicity is worth more than any potential tax saving.

How an S-Corp election changes the math

When an LLC elects S-Corp status, the owner who works in the business must be treated as an employee and paid a reasonable salary through payroll. That salary is subject to payroll taxes. Profit above the salary can then generally be taken as a distribution, which is not subject to self-employment or payroll tax.

That split is where the savings come from. Instead of paying self-employment tax on all your profit, you pay payroll tax only on the reasonable-salary portion. The remaining profit, taken as distributions, avoids that particular tax — while still being subject to income tax.

The key constraints:

• The salary must be reasonable. The IRS expects S-Corp owner-employees to pay themselves a salary that reflects the value of the work they do. Paying an artificially low salary to dodge payroll tax is a well-known audit risk. The IRS discusses this directly in its guidance on S corporation employees, shareholders and corporate officers.
• You must actually run payroll. That means registering as an employer, withholding and remitting payroll taxes, and filing payroll returns.
• You must file a corporate return. An S-Corp files its own information return and issues a Schedule K-1 to each owner.

When the S-Corp election tends to pay off

There is no universal dollar figure, but the logic is consistent: the S-Corp election is worth considering once your net profit is reliably high enough that the self-employment-tax savings on distributions exceed the extra costs — payroll processing, a separate tax return, and the time to administer it all.

Signs that an S-Corp election may be worth modeling:

• Your business profit is consistently strong and not just a one-off good year.
• You are an active owner doing the work, so a large slice of profit is currently hit by self-employment tax.
• You can support a defensible reasonable salary and still have meaningful profit left to distribute.
• You are willing to take on the administrative discipline of payroll and a corporate filing.

Signs it may be premature:

• Profits are modest, irregular, or reinvested back into growth.
• You value simplicity and low admin while you are still finding product-market fit.
• The estimated tax saving is small relative to the cost of payroll and an extra return.

Because the trade-off hinges on your actual profit, reasonable-salary level, and state-specific costs, run the numbers for your situation rather than relying on a rule of thumb — and confirm current rules, since tax rates and thresholds change each year.

Costs and trade-offs to weigh

The S-Corp election is not free money. Before electing, factor in:

• Payroll administration. Setting up and running compliant payroll has real cost and ongoing obligations.
• A separate tax return. S-Corps file their own return, which usually means higher preparation fees than a simple pass-through.
• State-level treatment. Some states impose additional taxes, fees, or franchise charges on S-Corps, and not every state treats the federal election the same way. Always check your state.
• Reasonable-compensation risk. Getting the salary wrong in either direction creates exposure — too low invites IRS scrutiny; too high erodes the saving.
• Less flexibility. S-Corps have eligibility limits on the number and type of owners and on classes of stock.

The IRS sets out the eligibility rules and the election process in its overview of S corporations, and the broader entity comparison in business structures. These are the authoritative starting points before any election.

A sensible decision framework

For most founders, the path looks like this:

1. Form the LLC first for liability protection and operational flexibility.

2. Operate under default taxation while profits are still building, keeping admin low.

3. Model the S-Corp election once profit is consistently strong, comparing the projected self-employment-tax saving against the all-in cost of payroll, the corporate return, and any state charges.

4. Set a defensible reasonable salary with professional input if you elect.

5. Revisit annually, because the right answer changes as your profit, time commitment, and the tax rules evolve.

How Next Tax Source can help

Entity and election decisions are exactly where good advice pays for itself, because a single mismatched choice can cost or save thousands every year. Our team models the LLC-versus-S-Corp trade-off using your real numbers, sets a defensible reasonable salary, and prepares the election and returns to a ready-to-file standard. To be clear about how we work: our tools and team prepare and quality-check the analysis, but a licensed US CPA or Enrolled Agent reviews and signs off the work, and you file and sign — we never submit to the IRS on your behalf.

If you are deciding how to set up, or wondering whether you have outgrown default LLC taxation, book a consultation and we will run the comparison for your specific profit and state. You can also see how ongoing tax and payroll support is structured on our pricing page.

The goal is simple: the lowest defensible tax bill, with the structure that fits where your business actually is — and where it is headed.

Frequently asked questions

Is an S-Corp better than an LLC?

It is not an either/or choice. An LLC is a legal entity; an S-Corp is a tax election an eligible LLC can make. The real question is whether your LLC should keep its default tax treatment or elect S-Corp status to reduce self-employment tax. The answer depends on your profit, a defensible salary, and your state's rules, so model it with a CPA or EA.

How does an S-Corp election save on taxes?

Under default LLC taxation, an active owner pays self-employment tax on essentially all net profit. With an S-Corp election, the owner takes a reasonable salary (subject to payroll tax) and can take remaining profit as distributions that avoid self-employment or payroll tax — though still subject to income tax. The salary must genuinely be reasonable.

What profit level makes an S-Corp worthwhile?

There is no fixed threshold. The election tends to pay off once profit is consistently high enough that the self-employment-tax savings on distributions outweigh the cost of running payroll, filing a corporate return, and any state charges. Because it depends on your numbers and current tax rates, run a tailored comparison rather than relying on a rule of thumb.

What is a reasonable salary for an S-Corp owner?

The IRS expects S-Corp owner-employees to pay themselves a salary that reflects the value of the work they perform. Setting it artificially low to minimise payroll tax is a recognised audit risk. A reasonable figure considers your role, hours, industry pay, and the business's results — it is best set with professional guidance and documented.

Does Next Tax Source make the election and file for me?

We model the decision with your real numbers, set a defensible salary, and prepare the S-Corp election and returns to a ready-to-file standard. A licensed US CPA or Enrolled Agent reviews and signs off the work, and you sign and file — a human, not AI, approves everything and we never submit to the IRS on your behalf. Book a consultation to run your comparison.