Introduction
Schedule SE is the IRS form that calculates Social Security and Medicare taxes on self-employment income. That includes US taxpayers who freelance or run a business while living in Australia.
"For 2027" means the 2027 tax year. The federal return is filed in 2028. As of 4 November 2026, the IRS had not released the final 2027 Schedule SE or instructions. The latest final version is the 2025 edition. Line numbers below come from that edition and are reference only.
This guide covers who must file, what income counts, how to complete the form, what Australian residents should check, and how to avoid stale figures. All dollar amounts are USD.
Key Takeaways
- Schedule SE generally applies once net self-employment earnings reach $400, with exceptions.
- Net earnings from Schedule C, Schedule F and some K-1s feed the form; W-2 wages do not.
- US citizens in Australia must weigh the US-Australia Social Security agreement before assuming tax is due or exempt.
- The 2027 wage base is confirmed at $192,300; the 2025 figure is not interchangeable.
What Is Schedule SE and Who Must File It?
What Schedule SE does
Schedule SE calculates self-employment tax. It is not a standalone return. The result flows to Schedule 2 and Schedule 1 of Form 1040, and the Social Security Administration uses the information to determine your benefits.
Self-employment tax funds Social Security and Medicare. Federal income tax is calculated under separate rules.
Who generally needs to file
You generally file when net self-employment earnings reach $400 or more, per IRS self-employment guidance.
Church employees have a separate test: $108.28 or more of qualifying church employee income (2025 instructions). Your age and whether you already receive Social Security benefits do not change the filing requirement.
Likely filers include:
- Sole proprietors, freelancers and consultants
- Independent contractors and gig workers
- Single-member business owners
- Partners with qualifying self-employment income
The threshold applies to combined net earnings. Every client and side business counts together.
What income usually enters the form
- Net profit from Schedule C (line 31 in the 2025 form)
- Farm profit from Schedule F (line 34)
- Partnership income from Schedule K-1 (Form 1065), box 14, code A
A K-1 reports a partner's allocable share of partnership income, deductions and credits. General partners make specified expense adjustments; limited partners include service guaranteed payments.
Passive rent, dividends, capital gains and W-2 wages are not ordinarily self-employment income, though some cases need fact-specific review.
How Is 2027 Self-Employment Tax Calculated?
2027 figures to verify before filing
Only one 2027 figure is confirmed: the Social Security wage base of $192,300, per the SSA contribution base. The 2025 form used $176,100.
Optional-method limits and line references for 2027 are not final, so do not carry 2025 values forward. When software, articles and estimates conflict, the final IRS form controls.
Core calculation steps
- Start with net profit: gross receipts less ordinary and necessary business expenses.
- Multiply positive combined profit by 92.35% (line 4a, 2025 form) to get net earnings.
- Apply 12.4% Social Security tax, up to the remaining wage base.
- Apply 2.9% Medicare tax with no cap, for a combined 15.3% below the base.
- Deduct half of the total SE tax (it lowers income tax, not SE tax itself).
Hypothetical example, using 2025 mechanics with the 2027 base: net profit of $100,000 gives net earnings of $92,350. That is under $192,300, so tax is $92,350 × 15.3% ≈ $14,130. The half-tax deduction is about $7,065. Confirm against the final 2027 form.
W-2 wages and the half-tax deduction
W-2 wages are never entered as self-employment income. Social Security wages in boxes 3 and 7 reduce the remaining Social Security base, not Medicare earnings.
Half of line 12 is deducted on Schedule 1, line 15 (2025 reference). That deduction reduces income tax only.
Additional Medicare Tax of 0.9% is calculated separately on Form 8959, per IRS Topic 560. Thresholds are:
- $250,000 married filing jointly
- $125,000 married filing separately
- $200,000 for other filing statuses
How to Complete Schedule SE for 2027
Before starting the form
Gather:
- Final Schedule C, Schedule F and any K-1
- W-2 Social Security wages
- Expense records and estimated payments made
- Taxpayer ID details
- Foreign-residence and agreement documentation
Download the final 2027 form and instructions from IRS.gov. Since 2020 there has been no short or long version. The form has Part I (tax) and Part II (optional methods).
Part I: calculating self-employment tax
Line flow on the latest published form (2025; confirm against the 2027 release):
- Lines 1a and 2: farm and nonfarm profit
- Line 4a: the 92.35% adjustment; 4c combines earnings
- Lines 5a-5b: church employee income
- Lines 7-10: Social Security portion against the wage base
- Line 11: Medicare, line 6 × 2.9%
- Line 12 to Schedule 2, line 4; line 13 to Schedule 1, line 15
Taxpayers without farm, church or partnership income can skip those lines. Always start from net figures on Schedules C, F and K-1, never from gross receipts or 1099 totals.
Part II: optional methods
Optional methods let low-profit taxpayers build Social Security credits, but they can raise current-year tax. Figures below are 2025 limits for reference until the IRS publishes 2027 amounts:
| Method | Key conditions |
|---|---|
| Farm | Gross farm income $10,860 or less, or net profit under $7,840 |
| Nonfarm | Net profit under $7,840 and under 72.189% of gross; $400+ earnings in 2 of prior 3 years; max 5 years |
| Combined | Optional earnings capped at $7,240 |
Do not use an optional method just to cut tax. Weigh the current cost against the Social Security credit benefit, and get advice if unsure.
Transferring the result to Form 1040
The tax goes to Schedule 2 and the deduction to Schedule 1. Verify 2027 line numbers. Tax software may transfer figures automatically, but you remain responsible for checking source schedules.
Schedule SE for US Taxpayers Living in Australia
US filing status and Australian residence
US citizens and resident aliens generally remain subject to self-employment tax abroad, subject to social security agreements, per the IRS abroad guidance. This is separate from Australian tax residency. Where your client, bank account or business registration sits does not decide the question.
Totalization Agreement considerations
The US-Australia agreement took effect on 1 October 2002. Under it:
- A self-employed person resident in the US is subject only to US laws.
- A self-employed US national resident in Australia is not subject to US laws, with SSA exemption documentation covering the same earnings.
- The wording specifies US nationals, so it is not a blanket exemption for every green-card holder.
Australia will not issue a certificate for self-employment. The eligible US citizen requests an SSA exemption letter from the Office of Earnings and International Operations (online at opts.ssa.gov). Attach a copy to each annual return claiming exemption.
FEIE, Foreign Tax Credit and professional review
The Foreign Earned Income Exclusion does not remove self-employment tax; the IRS includes all such income in net self-employment earnings. The Foreign Tax Credit offsets US income tax liability. Whether it also reduces self-employment tax is unclear, so check current IRS guidance or ask a cross-border adviser before relying on it for that purpose.
If you have cross-border questions, VJM Global's US-compliant tax and accounting professionals can review your position before filing.
Filing, Payments, Mistakes, and Final Checklist
Deadlines and estimated payments
The draft 2027 Publication 926 shows 18 April 2028 as the due date for the 2027 return. Confirm that date against the final IRS release. Qualifying taxpayers abroad get an automatic two-month extension to file and pay, with interest running from the regular due date. Form 4868 extends filing, not payment.
Estimated payments are generally due 15 April, 15 June, 15 September and 15 January of the following year. Draft 2027 guidance lists the first three payment dates for 2027.
Paying from Australia:
- Direct Pay needs a US ABA routing number; SWIFT codes do not work.
- EFTPS accepts no new individual accounts.
- Cards are accepted online, with fees.
Common Schedule SE errors
- Using gross 1099 income instead of net profit
- Omitting a small side business
- Entering W-2 wages as self-employment income
- Ignoring the Social Security wage base
- Using the 2025 base of $176,100 instead of $192,300
- Choosing an optional method incorrectly
- Mismatching amounts across Schedule C, Schedule SE, Schedule 2, Schedule 1 and Form 1040
Reconcile every transferred figure before submitting.
Records and final review
The IRS says to keep records 3 years generally, 6 years if you omit more than 25% of gross income, and indefinitely if no return was filed. Retain invoices, bank records, receipts, W-2s, K-1s, foreign tax documents, payment confirmations and agreement paperwork.
Final checklist:
- Confirm taxpayer status.
- Identify all self-employment income.
- Calculate net profit.
- Use final 2027 IRS figures.
- Review Australian social-tax implications.
- Transfer the result correctly.
- Arrange payment or professional review.
Frequently Asked Questions
What is Schedule SE and who must file it?
It calculates self-employment tax. You generally file if you have net earnings of $400 or more. Church employees, farmers and clergy have special rules.
What are the Schedule SE thresholds and limits for 2027?
The confirmed 2027 Social Security wage base is $192,300. The $400 threshold is current guidance. Optional-method limits await the final 2027 instructions.
How is self-employment tax calculated on Schedule SE?
Net profit is multiplied by 92.35%, then taxed at 12.4% Social Security (up to the base) and 2.9% Medicare. Half the total is deductible.
Do I need to file Schedule SE if I live in Australia?
Living in Australia does not automatically remove a US obligation. Review your US status, net earnings and the Social Security agreement.
Does the Foreign Earned Income Exclusion eliminate self-employment tax?
No. The IRS keeps excluded income in net self-employment earnings. Review Totalization Agreement rules separately.
When is Schedule SE due for the 2027 tax year?
File it with your federal return by 18 April 2028. Confirm filing, payment, extension and estimated-tax dates in current IRS guidance.
