S-Corp vs LLC: Which Actually Saves More Tax?

Written by CA Sumit ChandwaniChartered Accountant & Founder · Reviewed by Minal Bihani, EA

"Should I become an S-corp?" is one of the most common questions we get from LLC owners, and the honest answer is: it depends on your numbers. An S-corp election can genuinely save you thousands of dollars a year in self-employment tax, or it can cost you money in payroll and compliance fees that outweigh the savings. The difference is your profit level and whether you run it correctly.

First, clear up the confusion

"LLC" and "S-corp" aren't competing entity types, they're different things. An LLC is a legal entity you form with your state. An S-corp is a tax election you make with the IRS. An LLC can choose to be taxed as an S-corp by filing Form 2553. So the real question isn't "LLC or S-corp", it's "should my LLC elect S-corp tax treatment?"

How the savings actually work

As a default LLC owner, all of your net business profit is subject to self-employment tax, 15.3% covering Social Security and Medicare, on top of regular income tax. That self-employment tax is the cost the S-corp election targets.

When your LLC is taxed as an S-corp, you split your income into two buckets: a reasonable salary you pay yourself through payroll (which is subject to payroll taxes), and the remaining profit, which you take as a distribution (which is not subject to self-employment tax). That distribution portion is where the savings come from.

The catch: reasonable salary

The IRS requires that your salary be "reasonable" for the work you do. You can't pay yourself $10,000 and take $110,000 as a distribution to dodge payroll tax, that's a well-known audit trigger. A reasonable salary reflects what someone would be paid to do your job. Getting this number right is the single most important part of running an S-corp correctly, and it's where professional guidance matters most.

When the S-corp election makes sense

• Your net profit is consistently above roughly $40,000, $50,000
• The business is stable enough to run payroll year-round
• You're comfortable with the added compliance (payroll filings, an 1120-S return)
• The tax savings clearly exceed the extra costs

When it doesn't

• Your profit is low or inconsistent, the savings won't cover the costs
• You can't justify a reasonable salary on top of meaningful distributions
• You're not ready for payroll and a separate business return
• You're a non-resident where the analysis is different

The costs to weigh against the savings

An S-corp isn't free. You'll need to run payroll (often through a payroll provider), file quarterly payroll returns, and file a separate Form 1120-S each year in addition to your personal return. Realistically that adds a few thousand dollars in compliance costs annually. The election only makes sense when your self-employment tax savings comfortably exceed those costs, which is why the profit threshold matters.

How and when to elect

You make the election by filing Form 2553. There are timing rules, generally within roughly two and a half months of the start of the tax year you want it to apply to, though late-election relief exists. If you're considering it for the current year, don't wait; the deadline matters.

A worked example, end to end

Imagine two identical consultants, each with $120,000 of net business profit. The first stays a default LLC. Her entire $120,000 is subject to self-employment tax at 15.3% on the bulk of it, on top of her ordinary income tax. The second elects S-corp treatment and pays herself a reasonable salary of $70,000, taking the remaining $50,000 as a distribution. Only the $70,000 salary is hit with payroll taxes; the $50,000 distribution avoids the 15.3% self-employment hit. That difference translates into several thousand dollars of annual savings. Now subtract her added costs, payroll processing and an 1120-S return, perhaps $2,000, $3,000 a year, and she's still clearly ahead. That gap is the entire case for the election.

What 'reasonable' really means in practice

The IRS doesn't publish a magic number for reasonable salary, which makes some owners nervous. In practice, a defensible salary reflects what you'd pay someone else to do your role, considering your industry, experience, hours, and the going market rate. Setting it too low to maximize distributions is a known audit flag and can lead to reclassification, back payroll taxes and penalties. The safe approach is to document your reasoning, comparable salaries, your duties, time spent, so the figure can withstand scrutiny. This is precisely the kind of judgment call where professional input protects you.

The ongoing obligations you're signing up for

Electing S-corp status changes your administrative life. You'll run payroll on a regular schedule, withhold and remit payroll taxes, file quarterly payroll returns (Form 941) and annual ones (Form 940), issue yourself a W-2, and file a separate corporate return (1120-S) that generates a K-1 flowing to your personal return. None of this is difficult with the right setup, but it's real ongoing work and cost. Owners who elect S-corp status and then fail to run payroll properly can lose the benefit and create problems, so the election only makes sense if you'll actually operate it correctly.

Non-residents and the S-corp question

One important caveat: S-corporations generally can't have non-resident alien shareholders. So if you're a non-resident owner, the standard S-corp strategy usually isn't available to you, and your tax planning takes a different path, often centered on how your LLC is treated for US purposes and your home-country tax treaty. This is a good example of why generic "S-corp saves tax" advice can be actively wrong for your situation, and why the analysis has to start with your specific facts.

Making the decision with confidence

Because the S-corp question depends entirely on your specific numbers, the right way to decide is to model it rather than guess. That means taking your actual projected profit, determining a defensible reasonable salary for your role, calculating the self-employment tax you'd save on the distribution portion, and subtracting the real all-in cost of running payroll and filing a separate corporate return. If the net is clearly positive and the business is stable enough to operate the structure properly, the election makes sense; if the margin is thin or your income is volatile, staying a default LLC may serve you better. This is a decision worth getting right, because once you elect, you've taken on ongoing obligations, and reversing course has its own complications. A short modeling exercise with a professional removes the guesswork and tells you, in dollars, whether the election is worth it for you this year.

Frequently asked questions

At what income does an S-corp start saving money?

There's no fixed line, but the savings typically begin to outweigh the added costs once net profit is consistently in the range of roughly $40,000, $50,000 or more. Below that, payroll and filing costs often eat up the self-employment tax savings. The right threshold depends on your specific numbers.

Can a non-resident own an S-corp?

Generally no. S-corporations can't have non-resident alien shareholders, so the standard S-corp strategy usually isn't available to non-resident owners. Different planning applies in that case, which is why generic advice can be misleading for international founders.

Is it hard to undo an S-corp election?

Revoking an S-corp election is possible but has timing rules and potential consequences, and you generally can't re-elect for several years afterward. Because reversing course is complicated, it's worth modeling the decision carefully before electing rather than treating it as easily reversible.

The bottom line

The S-corp election is one of the most effective tax-saving moves available to a profitable LLC owner, but it's not automatic, and it's not for everyone. The right answer comes from running your actual numbers: your profit, a defensible reasonable salary, and the all-in compliance cost. MOREOFTAX models the S-corp decision for you, files Form 2553 if it makes sense, and handles the payroll and 1120-S afterward. Get a free quote and we'll tell you honestly whether it's worth it for your situation.