Introduction
Plenty of owners assume an S corporation wipes out self-employment tax. It doesn't. The structure generally moves your pay into salary, which carries payroll taxes, while leftover profit passes through and is treated differently.
This article covers U.S. federal rules. It's especially relevant for Australia-based owners with U.S. businesses or entities. Australian tax residency, foreign-income reporting, treaty and currency questions need separate professional advice.
We'll cover self-employment tax basics, salary and distributions, K-1 income, reasonable compensation, the 2% rule, home-office expenses, compliance costs, and how to judge whether an election is worthwhile.
Key Takeaways
- An S corporation is a tax election for an eligible U.S. entity, not a guaranteed saving.
- Active owner-employees must take reasonable salary before distributions.
- Wages, K-1 income, distributions and personal income tax are four separate things.
- Compare any payroll-tax saving against accounting, payroll, state and cross-border costs.
- Check current IRS rules and get advice before changing structure or salary.
What S Corporation Self-Employment Tax Means
What self-employment tax covers
Self-employment (SE) tax funds Social Security and Medicare for people who work for themselves. It applies to net earnings of sole proprietors, disregarded single-member LLCs and certain partnerships. It is separate from income tax.
For 2026, the figures per IRS Topic 554 are:
- Regular SE tax is 15.3%: 12.4% Social Security plus 2.9% Medicare
- It generally applies to 92.35% of net self-employment earnings
- Social Security applies up to US$184,500; Medicare is uncapped
- Additional Medicare Tax of 0.9% applies above US$200,000 (single) or US$250,000 (married filing jointly)
- Half of SE tax is deductible when calculating adjusted gross income
How an S corporation changes the analysis
A working shareholder-employee is paid wages, which carry payroll taxes (FICA). Remaining profit passes through and is reported on a Schedule K-1. Genuine K-1 income isn't SE income.
"Not subject to self-employment tax" does not mean tax-free. K-1 income is still taxed at your personal income tax rates.
Who needs extra caution
- Active owner-operators, who must pay themselves a real salary
- Businesses with inconsistent profits
- Loss-making businesses
- Passive shareholders
- Australia-based or other non-U.S. owners, since eligibility rules bar direct nonresident alien shareholders
How Salary, K-1 Income, and Distributions Work
Salary and payroll taxes
Money flows in order: revenue, deductible expenses, owner salary, payroll withholding and employer taxes, then remaining profit. On wages, employer and employee each pay 6.2% Social Security up to US$184,500, plus 1.45% Medicare with no cap.
Payroll admin is not optional:
- Quarterly Form 941 reports withholding and both FICA shares
- Annual Form 940 reports employer-only FUTA
- Form W-2 reports the owner's wages
- Payroll records must be kept
Treating personal withdrawals as payroll-free pay invites trouble, as the next section shows.
K-1 income and distributions
A K-1 reports your share of profit. According to the IRS K-1 instructions, ordinary business income is taxable whether or not cash is distributed, and it isn't SE income. A K-1 is a reporting document, not a cash payment.
Distributions are different. Non-dividend distributions are generally tax-free up to your stock basis. Any excess is capital gain, and debt basis doesn't shelter it. Form 7203 tracks basis.
A practical distribution routine:
- Confirm the corporation has available cash and you have sufficient basis
- Pay from the business account to the shareholder, pro rata to ownership
- Record the transaction in the books and minutes
- Never mix personal and corporate funds
Illustrative US$200,000 comparison
Suppose a business earns US$200,000 in profit. A sole proprietor owes SE tax on 92.35% of that, with Social Security capped at US$184,500. An S corporation owner instead takes a reasonable salary, which bears payroll tax, and receives the rest as a distribution without SE tax.
How much you save depends on salary, state taxes, payroll costs and deductions. For 2026, the standard deduction is US$16,100 single or US$32,200 joint. The 24% bracket for a single filer runs from US$105,700 to US$201,775 of taxable income.
Eligible owners may also claim a QBI deduction of up to 20%, though reasonable S corporation compensation is excluded from it.
Reasonable Compensation and IRS Risk
How reasonable compensation is determined
Salary must reflect services actually performed. The IRS compensation guidance lists these factors:
- Training and experience
- Duties and responsibilities
- Time and effort
- Pay for comparable businesses
- Non-shareholder employee pay and dividend history
- Compensation agreements and formulas
No fixed percentage exists. BLS wage data supplies benchmarks by occupation, industry and geography.
Document your position with:
- A written job description
- Time records and comparable pay data
- A regular payroll schedule
- An annual compensation review
What happens when salary is too low
The IRS can recharacterise distributions as wages and assess payroll taxes, interest and penalties. In David E. Watson, P.C., an owner paid US$24,000 while the court upheld US$91,044 as reasonable pay. Watson is evidence-based, not a safe-harbour ratio.
Deposit penalties run from 2% (1-5 days late) to 15%. Responsible persons who wilfully fail to pay over trust-fund taxes can be personally liable.
Lawful ways to reduce employment-tax exposure
- Choose an appropriate entity
- Claim properly supported deductions
- Pay reasonable compensation
- Use compliant retirement and benefit plans
- Plan cash distributions around basis
Avoid these practices:
- Hiding revenue
- Disguising wages as distributions
- Paying personal expenses from the company
- Setting an artificially low salary
The 2% shareholder rule
The 2% rule concerns fringe benefits, not salary. Shareholders owning more than 2% of stock or voting power on any day of the year, including constructive ownership under Section 318 (spouse, children, grandchildren, parents), are treated like partners for benefits.
Corporation-paid health premiums go in W-2 box 1, not boxes 3 and 5. The shareholder may then deduct them on Form 7206, subject to limits. Notice 2008-1 denies the deduction where the company neither pays nor reimburses the premium.
S Corporation Compliance, Deductions, and Ongoing Costs
Election and filing requirements
Form 2553 elects S status. It's normally due within 2 months and 15 days of the tax year starting, with all shareholders consenting. Late-election relief under Rev. Proc. 2013-30 generally requires reasonable cause and a request within 3 years and 75 days.
Eligibility requires:
- A U.S. domestic entity
- No more than 100 shareholders
- One class of stock
- No direct nonresident alien shareholders An LLC can elect S status with Form 2553 without becoming a state-law corporation. Form 8832 alone doesn't do it.
Ongoing administration
- Form 1120-S, due the 15th day of the third month after year-end (Form 7004 gives a six-month extension)
- A K-1 for each shareholder
- Payroll filings: Forms 941, 940 and W-2
- Estimated tax payments
- Bookkeeping and separate bank accounts
- State annual reports or franchise tax
- BOI reporting with FinCEN, if currently required
Late 1120-S penalties are US$260 per shareholder per month (up to 12 months) for returns due in 2027. Build a current-year checklist rather than trusting old deadlines.
Home-office and reimbursed business expenses
Ordinary employees can't claim a personal home-office deduction in 2026. The corporation can instead reimburse you under an accountable plan. Regulation 1.62-2 requires:
- A business connection
- Timely substantiation
- Return of excess amounts
Qualifying reimbursements aren't wages. Home-office costs still need qualifying regular and exclusive business use. The company can't simply pay personal costs and deduct them without records.
Is an S Corporation Right for You?
Compare expected savings with total costs
Weigh these items:
- Recurring profit versus your reasonable salary
- Payroll taxes on that salary
- State taxes and fees
- Accounting and payroll charges
- Retirement-plan goals and health-benefit treatment
- Cash-flow needs
- Your ability to keep corporate records
When an S corporation may not be suitable
Be cautious if:
- Profits are low or unpredictable
- You're in early-stage losses
- Nearly all profit counts as reasonable compensation
- You want maximum flexibility
- Admin costs would outweigh the savings
Cross-border considerations for Australia-based owners
- U.S. status: Australian residence alone doesn't determine it. Non-citizens generally apply the green-card or substantial-presence test, and direct nonresident alien ownership is prohibited.
- ATO reporting: Residents declare assessable overseas income. Controlled foreign company rules can attribute income without distribution.
- Classification: An S election alone doesn't establish Australian flow-through treatment. Section 830-15 gives conditional foreign-hybrid treatment for qualifying U.S. LLCs.
- Foreign tax offset: It is non-refundable with no carry-forward.
- Treaty: Article 10 generally caps source-country dividend tax at 15%, but that isn't an S distribution rate.
- Currency: Translate foreign income and tax into A$ using ATO-permitted rates.
Don't assume S treatment gives the same result in Australia.
Practical next steps and professional support
Gather:
- Current profit-and-loss statements
- Owner duties and hours
- Salary benchmarks
- Prior tax returns
- State registrations
- Shareholder details
- Distribution history
- Cross-border residency information
VJM Global offers U.S.-compliant accounting, tax compliance, bookkeeping and payroll coordination for international and Australia-based businesses. The firm has served 250+ Australian businesses. It can't promise a particular tax outcome, but it can help you test the numbers.
Frequently Asked Questions
How much tax will an S corp pay on $200,000?
It can't be determined from US$200,000 alone. Salary payroll taxes, pass-through income tax, distributions, deductions, state taxes and shareholder circumstances all matter, so you need a full calculation with your tax advisor.
How do I reduce self-employment tax?
A properly structured S corporation may reduce employment-tax exposure. Reasonable compensation, accurate payroll, supported deductions and ongoing compliance are essential.
How do I take a distribution from an S corp?
Check available corporate cash and your stock basis, then pay from the business account according to ownership. Keep distribution records. A distribution can't replace reasonable wages.
Is K-1 income subject to self-employment tax?
Genuine S corporation pass-through income generally isn't SE income, unlike W-2 wages. The exact result depends on the income type and your circumstances.
What is the 2% rule for S Corps?
It addresses benefits such as health insurance for shareholders owning more than 2%. It doesn't set your salary.
Can an S corp deduct home office expenses on its taxes?
Eligible costs generally need an accountable-plan reimbursement with substantiation. Check current IRS guidance, including Publications 587 and 463.
