Many Australians with US citizenship, a green card or US-source income get this wrong. They compare their income with one number and stop. This guide covers the IRS threshold chart, the situations that require filing below it, Australia-specific issues, and reasons to file even when you don't have to.
Key Takeaways
- Tax year 2026 returns are filed in 2027; confirm thresholds in current IRS Publication 501.
- Gross income, not taxable income, drives the filing thresholds.
- Self-employment, certain taxes, or credit reconciliation can force a filing at low income.
- FBAR and Form 8938 sit outside the Form 1040 income test.
- Filing recovers withholding and refundable credits; the deadline is April 15, 2027.
2027 Form 1040 Minimum Income Thresholds by Filing Status
What "2027 tax filing" means
The 2026 tax year runs January 1 to December 31, 2026. The return is due in 2027. Mixing the two years is the most common mistake when reading filing thresholds.
The latest final filing chart in IRS Publication 501 is for tax year 2025. Those figures show the structure and scale, but don't treat them as 2026 thresholds.
The IRS has published 2026 inflation adjustments, including higher standard deductions. Check the 2026 edition of Publication 501 and the "Do I Need to File a Tax Return?" tool before you rely on any number.
Gross-income filing thresholds (2025 chart)
You must file if your gross income is at least the amount shown, according to IRS Publication 501.
| Filing status | Under 65 | Age 65 or over |
|---|---|---|
| Single | $15,750 | $17,750 |
| Married filing jointly | $31,500 (both under 65) | $33,100 (one 65+); $34,700 (both) |
| Married filing separately | $5 | $5 |
| Head of household | $23,625 | $25,625 |
| Qualifying surviving spouse | $31,500 | $33,100 |
The married-filing-separately figure looks like a typo, but it isn't. A married person filing separately must generally file with almost any income, and living with a spouse during the year can tighten the rules further. Filing status changes the answer more than any other factor.
Gross income versus taxable income
Gross income is all income you receive in money, goods, property and services that isn't exempt. This is what you compare with the threshold. Taxable income is what's left after deductions, and credits then reduce the tax itself.
Income to count includes:
- Wages and salary, including from Australian employers
- Interest and dividends
- Pensions and annuities
- Rental income
- Taxable capital gains
- Foreign income
Why the standard deduction matters
The filing threshold generally tracks the standard deduction. For 2026 the basic deductions are:
- Single: $16,100
- Head of household: $24,150
- Married filing jointly: $32,200
The additional amount for age 65 or blindness is $1,650 per condition for married taxpayers and $2,050 for single or head of household filers.
These are deductions, not confirmed 2026 filing thresholds. Claiming a deduction also never cancels your duty to report income.
When You Must File Even Below the Basic Income Threshold
Self-employed, freelance and gig income
If your net self-employment earnings reach $400, you generally must file Form 1040 with Schedule SE, whatever your age or status. Net means business receipts minus allowable business expenses.
A small side business can therefore trigger a filing. Examples relevant to Australians and digital workers:
- Consulting for a US client
- Online services or coaching
- Content creation paid by US platforms
- Freelance design, writing or development work
Other income and additional-tax triggers
Other situations can require a return regardless of the income chart:
- Net earnings of $108.28 or more from an exempt church employer (Schedule SE)
- Advance Premium Tax Credit payments (Form 8962)
- Unreported tips (Form 4137)
- HSA distributions (Form 8889)
- Archer or Medicare Advantage MSA distributions (Form 8853)
- Additional taxes on retirement accounts (Form 5329)
- Alternative minimum tax (Form 6251)
Capital activity matters too. Selling shares, cryptocurrency, property or foreign investments can create reporting through Form 8949 and Schedule D even when your wages are low. Every Form 1040 filer also answers the digital-asset question. Form requirements change each year, so confirm them on the current IRS pages.
Withholding and estimated payments
Tax withheld from wages or pensions isn't refunded automatically. You generally have to file to claim it. The same applies to estimated payments and prior-year overpayments. The IRS generally allows three years from the return due date to claim a refund.
Foreign accounts are a separate test
FBAR and Form 8938 are information-reporting rules. They are not alternative income thresholds.
- FBAR (FinCEN Form 114): file with FinCEN (not your return) if foreign financial accounts exceed $10,000 in aggregate at any time in the year
- Form 8938: attaches to your return when you meet the foreign-asset thresholds for your filing status
For taxpayers living abroad, Form 8938 thresholds are over $200,000 at year-end or $300,000 at any time (single), and $400,000 / $600,000 (joint). If you have no required return, you have no required Form 8938.
Filing can still be required when no tax is due
An Australian-resident US citizen running a small consultancy for US clients is a common case. After expenses she nets $3,000, well below the single filing threshold, and foreign tax credits wipe out any income tax.
She still must file. Net self-employment earnings over $400 mean Schedule SE applies.
How Income Type, Dependants and Age Affect Filing
Dependant filing requirements
A dependant has three separate tests: earned income, unearned income and total gross income. Meeting any one can require a return. Earned income is pay for work. Unearned income is interest, dividends, capital gains and similar investment income.
Using the 2025 chart for a single dependant under 65 who isn't blind, the dependant must file if:
- Unearned income exceeds $1,350
- Earned income exceeds $15,750
- Gross income exceeds the larger of $1,350 or earned income (capped at $15,300) plus $450
Being claimed as someone's dependant doesn't stop a child from needing their own return.
Social Security, pensions and retirement distributions
Social Security is tested with your other income. Add half your benefits to other income, including tax-exempt interest, and compare the total with the base amount:
- $25,000 for single, head of household or qualifying surviving spouse
- $32,000 for married filing jointly
- $0 for married filing separately if you lived with your spouse at any time in the year
Exceeding the base triggers a calculation, not taxation of all benefits. SSI is not taxable. Pensions and IRA distributions also count toward your gross income.
Investment, property and tax-exempt income
Interest, dividends, rental income, crypto disposals and property sales all count toward gross income. Tax-exempt interest isn't taxed as ordinary income, but it still counts in the Social Security formula and can require reporting.
Age, disability and status changes
Use your status and age at the end of the tax year. You count as 65 the day before your 65th birthday. For the 2025 chart, that meant being born before January 2, 1961.
Marital status generally depends on the last day of the year, so a marriage or divorce in December can change your threshold. Confirm your filing status first, then apply the threshold.
What Australians and Other Overseas Taxpayers Should Know
US citizens and green-card holders living in Australia
US citizens and resident aliens generally report worldwide income, including Australian wages, business income and investment returns. The filing rules are the same abroad as at home.
Two common tools can reduce US tax due, but neither removes the Form 1040 requirement:
- Foreign Earned Income Exclusion: the 2026 maximum is $132,900, claimed on Form 2555. Excluded earnings still count in the filing test.
- Foreign tax credit: generally Form 1116, for eligible foreign income taxes.
Report all amounts in US dollars, generally using the exchange rate when income is received, paid or accrued. Apply these tools only after you have identified and reported your income.
Non-US citizens with US income
Nonresident aliens use Form 1040-NR, not the resident threshold table. Filing can be triggered by:
- US wages
- Income effectively connected with a US business
- US-source investment income where tax wasn't fully withheld
Nonresident filers can't use joint or head-of-household status.
Resident status can turn on the substantial presence test: 31 days in the current year and 183 weighted days over three years. The US-Australia treaty can alter outcomes, but its saving clause generally preserves US taxation of citizens and residents. Don't assume a blanket answer for every Australian.
Australian obligations are separate
A US federal return doesn't replace your Australian tax return or other ATO obligations. Assess each system separately, and watch for timing differences, since the US year follows the calendar and Australia's runs July to June.
If you have cross-border income, income in several currencies, or uncertainty over whether Form 1040 or 1040-NR applies, VJM Global's tax compliance and advisory team can help. The team includes CPAs, chartered accountants and US-compliant professionals who prepare Form 1040 and 1040-NR returns. Outcomes depend on your individual facts.
Filing Anyway, Deadline and Final Checklist
Reasons to file when income is below the threshold
You may want to file voluntarily to:
- Recover federal tax withheld from wages or pensions
- Claim estimated payments or an earlier overpayment
- Claim refundable credits such as the Earned Income Tax Credit, Additional Child Tax Credit, American Opportunity Tax Credit or Premium Tax Credit
Credit rules are strict, so check the current IRS pages before you count on one. Examples:
- The EITC generally can't be claimed with Form 2555.
- The Additional Child Tax Credit is barred when you claim the foreign earned income exclusion or housing deduction.
- Education credits and the EITC require employment-valid Social Security numbers by the filing deadline, including extensions.
The 2027 Form 1040 deadline
| Milestone | 2027 date | Rule |
|---|---|---|
| Regular filing and payment | Thursday, April 15 | No weekend adjustment |
| Automatic overseas extension | Tuesday, June 15 | Interest still runs from April 15 |
| Form 4868 extension | Friday, October 15 | Extends filing, not payment |
US citizens and resident aliens living abroad get an automatic two-month extension if they qualify. Interest still accrues from April 15 even when that extension covers filing and payment.
A Form 4868 only extends the time to file, not the time to pay. These dates do not apply the same way to Form 1040-NR. State and Australian deadlines are separate.
A five-step decision checklist
- Establish your profile. Confirm tax residency, citizenship or green-card status, filing status, age, blindness and dependency status.
- Total your income. Add wages, self-employment, investments, retirement, property and foreign income, converted to US dollars with the correct method.
- Check special triggers. Look at self-employment, additional taxes, advance credits and withholding.
- Test separately for foreign reporting and form choice. Review FBAR and Form 8938 triggers, and decide between Form 1040 and 1040-NR.
- Confirm with IRS sources. Use the IRS "Do I Need to File a Tax Return?" tool and current publications. If international income or several forms make the answer unclear, get professional advice.
Frequently Asked Questions
What is the minimum income to be required to file a Form 1040 federal tax return?
It varies by filing status, age and dependency status. For a single filer under 65, the latest published chart (tax year 2025) says $15,750. Check the 2026 chart in Publication 501 for returns filed in 2027.
Who is required to file a federal income tax return?
Anyone whose gross income meets the threshold for their status. You may also have to file below it if you have self-employment earnings of $400 or more, additional taxes, advance premium credits or certain other triggers.
What is the deadline for filing federal income tax (Form 1040)?
For tax year 2026, the regular filing and payment deadline is April 15, 2027. Qualifying overseas taxpayers get until June 15, though interest runs from April 15. A Form 4868 extension runs to October 15 but doesn't extend payment.
What is the best way to reduce my taxable income?
Use legal tools: the standard or itemised deduction, eligible retirement contributions and exclusions. Credits reduce tax rather than taxable income. None of these removes the duty to report gross income.
What is a tax bracket?
Brackets are marginal rates applied to layers of taxable income. Moving into a higher bracket taxes only the income in that layer at the higher rate, not all of it.
What is unearned income?
Income not earned from work, such as interest, dividends, capital gains and certain investment distributions. Dependant filing rules test it separately from earned income.
