Understanding S Corp taxes can feel confusing because there isn’t one S Corp tax. Instead, as an owner, you deal with income tax, payroll taxes and new federal filings, not to mention how your state may treat S Corp filings. However, once you see how the pieces fit together, the system is more predictable than it first appears.
This guide covers how S Corps are taxed, which taxes you’re responsible for, where the potential savings come from, and how to stay on top of your filings.
How S Corp taxes work
An S Corp is a tax classification, not a type of business you form. In fact, most solopreneurs get there by forming an LLC and then electing S Corp tax treatment with the IRS.
S Corps are pass-through entities. In other words, the business generally doesn’t pay federal income tax itself. Instead, its profit “passes through” to the owners, who report it on their personal tax returns and pay tax at their individual rates (IRS).
How default taxation differs for a Business-of-One
How the IRS taxes a business by default depends on how many owners it has, and for a Business-of-One, the difference is especially noticeable. The IRS doesn’t treat a single-member LLC (SMLLC) as separate from its owner for federal income tax purposes. As a result, all of its profit lands on your personal return and is generally subject to self-employment tax, whether you take the money out or leave it in the business. Similarly, the IRS taxes a multi-member LLC as a partnership by default, which also passes self-employment income through to its owners.
The S Corp election changes that. It’s available to small businesses of any size, from a single owner up to 100, as long as every owner is eligible (generally individuals who are U.S. citizens or residents, plus certain trusts and estates). For many small businesses, it can be one of the more effective ways to align the business’s tax treatment with how it actually operates.
How S Corp owners get paid
What makes an S Corp different from a default LLC is how you get paid. If you work in the business, you’re both an owner and an employee:
- As an employee, you receive a salary through payroll, so payroll taxes apply.
- As an owner, you can then take the remaining profit as distributions, which aren’t subject to payroll taxes.
That split is the core of how S Corp taxes work. It’s also why the IRS requires you to pay yourself a reasonable salary before taking distributions.
Here are the main taxes S Corp owners pay at a glance:
| Tax | Who pays it | What it’s based on | How it’s reported |
|---|---|---|---|
| Federal income tax | You, on your personal return | Your salary plus your share of business profit | W-2 and Schedule K-1, both carried to your Form 1040 |
| Social Security and Medicare (payroll taxes) | Split between your S Corp and you | Your salary only | Quarterly payroll tax returns and your W-2 |
| Federal unemployment tax (FUTA) | Your S Corp | A portion of your salary | Annual federal unemployment tax return |
| State income tax | You, and in some states the S Corp | Varies by state | State returns |
| State payroll taxes | Your S Corp, and sometimes you | Your salary | State payroll filings |
Income and payroll taxes for S Corp owners
Income tax on your profit
Each year, your S Corp files a business tax return (Form 1120-S). This return reports the company’s income, deductions and profit. It also includes a Schedule K-1 for each owner showing their share of the profit or loss, so if you’re the only owner, your share is 100%. (Here’s how Form 1120-S and Form 1040 differ.)
Your personal return then picks up two pieces of income:
- Your salary, from your W-2.
- Your share of profit, from your K-1, which goes on Schedule E.
One point often surprises new S Corp owners: you owe income tax on your share of profit whether or not you take it out of the business. However, the IRS generally doesn’t tax distributions a second time, as long as they don’t exceed your basis. Your basis is roughly what you’ve invested in the business plus profits you’ve already paid tax on. If distributions go above your basis, the excess can count as a capital gain. For more, see how S Corp distributions work.
Payroll taxes on your salary
Payroll taxes fund Social Security and Medicare. Unlike income tax, they apply only to your salary, not your distributions. The combined rate is 15.3%, split evenly: your S Corp pays 7.65% and withholds the other 7.65% from your paycheck.
In addition, a few details are worth knowing:
- Social Security (12.4% of the combined rate) applies only up to an annual wage cap, which is $184,500 for 2026 (SSA via Journal of Accountancy).
- Medicare (2.9%) applies to all wages. On top of that, an additional 0.9% Medicare tax applies to higher earners, and employers must start withholding it once wages pass $200,000 in a year.
- Federal unemployment tax (FUTA) applies to a portion of your salary, and your S Corp pays it. Because paying state unemployment tax on time generally earns a credit, the federal amount usually stays small.
Your S Corp also files quarterly payroll tax returns and issues you a W-2 each January. Typically, a payroll provider handles the withholding, deposits and filings.
Where the potential S Corp tax savings come from
Without the S Corp election, a single-member LLC owner pays self-employment tax on nearly all of their net profit. With the election, by contrast, payroll taxes apply only to the salary portion.
For example, a business earning profit of $100,000, with the S Corp owner paying themselves a $55,000 salary:
| SMLLC (default) | S Corp | |
|---|---|---|
| Profit | $100,000 | $100,000 |
| Amount subject to Social Security and Medicare taxes | About $92,350 (self-employment tax applies to 92.35% of net profit) | $55,000 salary |
| Social Security and Medicare taxes | About $14,130 | About $8,415 |
| Difference before added costs | About $5,715 |
Keep in mind that this example is illustrative. It doesn’t include income tax, state taxes, or the added cost of payroll, bookkeeping and a business tax return. Your reasonable salary also depends on your role and market pay, not a target number.
So, if tax savings are your main motivator for electing S Corp status, the election makes sense when the savings potential is greater than the cost of the extra work it takes to run an S Corp. To see where that tends to happen, see Is an S Corp worth it? and how to reduce self-employment tax with an S Corp.
Deductions and benefits that affect S Corp taxes
Beyond the salary and distribution split, a few other provisions can shape what you owe.
Qualified business income (QBI) deduction
Eligible owners of pass-through businesses may be able to take the qualified business income (QBI) deduction, which reduces the taxable income from the business. For S Corp owners, however, your salary doesn’t count as qualified business income, while your share of profit generally does. Under current law, the deduction is permanent, although limits can apply at higher incomes and for certain service businesses. Learn more about the QBI deduction.
Health insurance
If your S Corp pays your health insurance premiums and you own more than 2% of the business, your W-2 wages include those premiums. However, the premiums generally aren’t subject to Social Security and Medicare taxes, and you may be able to deduct them on your personal return (IRS). For details, see how health insurance works for S Corp owners and the 2% shareholder health insurance rule.
Retirement contributions
With an S Corp, your W-2 salary, not total profit, determines your retirement contributions. For example, in a Solo 401(k), you can contribute both as an employee and as the employer, and your salary drives both amounts. As a result, a lower salary can reduce payroll taxes, but it also lowers how much you can contribute. See retirement plans for S Corp owners.
Business expenses and reimbursements
Ordinary and necessary business expenses reduce the S Corp’s profit and, in turn, the income that passes through to you. In addition, when you pay business expenses personally, like a home office or the business share of your phone, your S Corp can reimburse you through an accountable plan. That way, the reimbursements stay out of your taxable wages.
How states treat S Corps
S Corp status is a federal election, but every state sets its own rules. As a result, state requirements can add as much to your to-do list as federal ones.
What varies by state
- Whether the state follows your federal election. Most states recognize it automatically. However, some require a separate state election or form, and a few states and cities don’t recognize S Corp status at all, taxing the business more like a regular corporation.
- Which returns you file. Many states require an annual S Corp or pass-through business return in addition to your personal state return.
- Entity-level taxes and fees. Some states charge franchise taxes, minimum taxes or entity-level income taxes on S Corps. Most also charge annual report or renewal fees to keep your LLC in good standing.
- Optional pass-through entity taxes. Many states let an S Corp elect to pay state income tax on its owners’ behalf, which may create a federal deduction.
- State payroll obligations. Running payroll means registering for state withholding and unemployment insurance accounts and, in some states, additional programs. Once you set up those accounts, your payroll system typically handles the ongoing filings and payments.
Planning for state requirements
In short, running an S Corp means managing federal and state requirements side by side, and the filing logistics add up. Before you elect, check your state’s rules with your state tax agency or a local tax professional. Then factor state costs into whether the election makes sense for you. For state-specific detail, Collective also has comparisons for California, New York, New York City, Texas, Florida and Georgia.
S Corp filing deadlines and penalties
An S Corp adds filings to your year: quarterly payroll tax returns, year-end W-2s, the S Corp business tax return (due a month before your personal return for calendar-year businesses), and your personal return, plus any estimated tax payments. Meanwhile, your payroll provider typically handles payroll tax deposits. To keep every date in one place, download Collective’s free tax calendar.
Late filings, however, can get expensive quickly. The IRS charges a penalty for a late S Corp business tax return for each shareholder, for each month the return is late, even if you owe no tax. Late or missed payroll tax deposits also bring their own penalties and interest. So if you need more time to file the business return, request an extension by the March 15 deadline.
Common S Corp tax mistakes to avoid
- Skipping payroll. Taking distributions without a reasonable salary is a red flag for the IRS and, as a result, can lead to back payroll taxes, penalties and interest.
- Assuming distributions are tax-free. Distributions avoid payroll taxes, but you still owe income tax on your share of profit.
- Underpaying estimated taxes. Withholding on a modest salary may not cover the tax on your profit, which can lead to underpayment penalties.
- Mixing personal and business expenses. Clean, separate books keep the business return accurate and also support your deductions.
- Forgetting state obligations. State payroll registration and S Corp rules vary, and missed filings carry their own penalties.
- Missing the March 15 deadline. The business return is due a month before your personal return, and you need your K-1 to file your own taxes.
FAQs about S Corp taxes
Have more questions? Our S Corp FAQ answers 50 of the most common ones.
Do S Corps pay federal income tax?
Generally no. Instead, an S Corp’s profit passes through to its owners, who pay income tax on their personal returns. That said, a business that was previously a C Corp may owe tax on certain built-in gains or passive income at the entity level.
Are S Corp distributions taxable?
Distributions aren’t subject to payroll taxes. Because you pay income tax on your share of the S Corp’s profit whether or not you distribute it, the IRS generally doesn’t tax distributions again unless they exceed your basis.
Do S Corp owners pay self-employment tax?
Not on S Corp income. Instead, you and your S Corp pay Social Security and Medicare taxes through payroll on your salary. Your share of profit on your K-1, on the other hand, isn’t subject to self-employment tax.
What tax forms does an S Corp file?
The main federal filings are the S Corp business tax return (Form 1120-S) with a Schedule K-1 for each owner, quarterly payroll tax returns, an annual federal unemployment tax return, and W-2s for anyone on payroll, including you.
Do S Corp owners need to make estimated tax payments?
Often, yes. If withholding on your salary won’t cover the tax on your share of profit, you may need to make quarterly estimated payments or increase your withholding.
Does an S Corp lower taxes for every business?
No. If tax savings are the main motivator, the election makes sense when the potential savings are greater than the cost of the extra work, including payroll, bookkeeping and a business tax return. Because the IRS doesn’t set an income threshold, the answer depends on your situation. See Is an S Corp worth it? for a closer look.
Staying ahead of S Corp taxes
Ultimately, S Corp taxes come down to a few moving parts: a reasonable salary through payroll, income tax on your share of profit, and a calendar of federal and state filings throughout the year. With those systems in place, tax season becomes a checkpoint, not a scramble.
Collective is the all-in-one back-office platform built exclusively for solopreneurs, from bookkeeping and payroll to business formation and tax filings. Learn more about Collective.
This content is for educational purposes only and does not constitute legal, financial, or tax advice.
