Introduction
The IRS published its inflation-adjusted figures for tax year 2027 on 5 November 2026. They generally apply to returns filed in 2028, so don't confuse them with the 2026 figures used during the 2027 filing season.
This guide covers U.S. federal income tax only. It is written for Australian residents, expatriates, investors and businesses with U.S. filing obligations.
Australian tax and ATO requirements sit on top of these rules and need separate treatment. All amounts are US dollars unless marked A$.
Key Takeaways
- Seven US federal rates (10% to 37%) apply across four filing-status columns.
- The 2027 US standard deduction is $16,600 (single), $33,200 (joint) and $24,925 (head of household).
- A marginal rate applies only to income inside its bracket.
- Australian residents may need to coordinate foreign tax credits, currency conversion and ATO reporting.
2027 Federal Income Tax Brackets and Rates
2027 federal brackets by filing status
These ranges apply to taxable income, not gross salary. Taxable income is what remains after eligible adjustments and the standard or itemised deduction. The qualifying surviving spouse column matches married filing jointly.
| Rate | Single | MFJ / surviving spouse | Head of household | MFS |
|---|---|---|---|---|
| 10% | $0–12,800 | $0–25,600 | $0–18,250 | $0–12,800 |
| 12% | to 52,025 | to 104,050 | to 69,650 | to 52,025 |
| 22% | to 109,125 | to 218,250 | to 109,100 | to 109,125 |
| 24% | to 208,325 | to 416,650 | to 208,300 | to 208,325 |
| 32% | to 264,550 | to 529,100 | to 264,550 | to 264,550 |
| 35% | to 661,375 | to 793,650 | to 661,350 | to 396,825 |
| 37% | above 661,375 | above 793,650 | above 661,350 | above 396,825 |
Each range starts where the previous one ends. The figures come from Rev. Proc. 2026-35, announced in IRS release IR-2026-133.
2027 changes and inflation adjustments
Compared with 2026, the 10% bracket for single filers rises from $12,400 to $12,800. The 12% bracket tops out at $52,025, up from $50,400. The 37% threshold moves from $640,600 to $661,375.
Indexing exists to counter bracket creep, where nominal pay rises push taxpayers into higher brackets without any gain in purchasing power. The seven-rate structure is permanent under the One Big Beautiful Bill Act (Public Law 119-21).
How marginal brackets work
Income is sliced across brackets. Take a single filer with $60,000 of taxable income:
- First $12,800 at 10% = $1,280
- Next $39,225 (to $52,025) at 12% = $4,707
- Remaining $7,975 at 22% = $1,754.50
Total tax is $7,741.50, an effective rate of roughly 12.9% of taxable income. Only the last $7,975 was taxed at the 22% rate.
2027 Standard Deduction and Personal Exemption
Standard deduction amounts by filing status
| Filing status | 2027 | 2026 |
|---|---|---|
| Single | $16,600 | $16,100 |
| MFJ / qualifying surviving spouse | $33,200 | $32,200 |
| Head of household | $24,925 | $24,150 |
| MFS | $16,600 | $16,100 |
The standard deduction reduces taxable income and is generally claimed instead of itemising. A credit, by contrast, reduces tax after liability is calculated.
Additional amounts for age, blindness, seniors and dependents
Age 65 or blind: each qualifying condition adds $2,100 for single or head of household filers, and $1,700 for married filers or qualifying surviving spouses. Age and blindness count separately, per eligible taxpayer or spouse.
Senior deduction: $6,000 per qualifying person ($12,000 if both spouses qualify) for 2025 to 2028.
- Must be 65 by year-end
- Each qualifying person needs a Social Security number
- Married claimants must file jointly
- Reduced by 6% of MAGI above $75,000 ($150,000 joint)
- Not indexed, and available whether you itemise or not
Dependents: a person who can be claimed by someone else gets the greater of $1,400 or earned income plus $500, capped at the basic standard deduction. A dependent with $3,000 of wages gets $3,500.
Personal exemption and itemising
The personal exemption is $0 for 2027, permanently under the OBBBA. Other deductions remain available.
Itemising on Schedule A generally makes sense when allowable deductions exceed the standard amount. The main categories are mortgage interest, charitable gifts, medical costs and state and local taxes.
The federal SALT cap was $40,400 for 2026, with the 2027 figure set at 101% of that. It phases down above a MAGI threshold. Taxpayers who file as married filing separately cannot take the standard deduction if their spouse itemises.
Other 2027 Federal Tax Figures to Watch
AMT and long-term capital gains
AMT is separate from ordinary brackets.
| Status | AMT exemption | Phaseout starts |
|---|---|---|
| Single / HOH | $93,000 | $515,950 |
| MFJ | $144,700 | $1,031,900 |
| MFS | $72,350 | $515,950 |
AMT rates are 26% on the first $252,500 of excess income and 28% above it ($126,250 breakpoint for MFS).
Long-term capital gains rates (0%, 15%, 20%) use their own thresholds:
- Single: 0% to $51,050; 15% to $563,200
- MFJ: 0% to $102,100; 15% to $633,600
- Head of household: 0% to $68,350; 15% to $598,400
- MFS: 0% to $51,050; 15% to $316,800
Credits and other thresholds
- Child Tax Credit: up to $2,300, with up to $1,800 refundable
- EITC: up to $8,496 (three or more children)
- Adoption credit: up to $18,250, with $5,280 refundable
- Health FSA: $3,500 salary reduction limit, $700 carryover
Business, estate and gift provisions
The annual gift exclusion is $20,000 per recipient ($201,000 for a non-U.S.-citizen spouse). The estate and gift basic exclusion is $15,480,000. QBI thresholds are not quoted in the IRS release, so check the revenue procedure before relying on any figures. These rules carry their own eligibility tests and don't feed into the standard deduction.
How to Use the 2027 Tax Tables to Estimate Taxable Income
From income to taxable income
- Confirm filing status (single, joint, head of household, or MFS); it sets your brackets and deduction amount.
- Total all income sources, not wages alone.
- Subtract above-the-line adjustments (for example, student-loan interest) to reach AGI.
- Subtract the standard or itemised deduction, plus the senior deduction if eligible.
- Apply the 2027 bracket table to the taxable income that remains.
Salary alone rarely equals taxable income. Investment income, business profits, retirement contributions and exclusions all move the number.
Marginal rate versus effective tax rate
The marginal rate applies to your next dollar of taxable income. The effective rate is total tax divided by taxable income (some comparisons use total income instead). A filer in the 22% bracket can still land near a 12.9% effective rate because lower brackets and deductions pull the average down.
Applying credits and considering other taxes
Credits come after preliminary tax is calculated. Other taxes sit outside the brackets:
- Net investment income tax: 3.8% above $200,000 single, $250,000 joint, $125,000 MFS (MAGI)
- Self-employment tax: 15.3% on 92.35% of net earnings
- Social Security wage base: $192,300 for 2027
- Additional Medicare Tax: 0.9% above the same MAGI-style thresholds
- AMT, plus any state taxes
A practical 2027 planning checklist
- Confirm filing status
- Compare itemised deductions with the standard deduction
- Review retirement and health-account contributions
- Check credit and senior-deduction eligibility
- Keep documentation until filing is complete
What Australian Residents and Businesses With U.S. Tax Obligations Should Consider
U.S. federal rules do not replace Australian tax obligations
U.S. citizens and green-card holders living in Australia may keep a U.S. filing obligation. Others may be caught through U.S.-source income, business activity or entity structure. Facts matter, so avoid blanket conclusions.
Key points to check:
- Brackets: the U.S. framework is separate from Australian rates and ATO reporting.
- Treaty: the 1982 treaty and 2001 protocol preserve U.S. taxation of citizens, subject to exceptions such as double-tax relief.
- Credits: Form 1116 claims U.S. foreign tax credits; no credit for tax on FEIE-excluded income. The Australian foreign income tax offset has its own limits, and claims above A$1,000 need the offset-limit calculation.
- Currency: U.S. returns use U.S. dollars; the ATO requires Australian dollars.
- Foreign-asset reporting: IRS Form 8938 and FBAR comparison lists FBAR at $10,000 aggregate and Form 8938 at $200,000 year-end for single filers abroad.
- FEIE: the 2027 maximum is $137,300, subject to qualification.
Qualifying taxpayers abroad get a two-month extension to file and pay, though interest runs from the regular due date.
Cross-border support for Australian businesses
VJM Global has served 250+ Australian businesses, supplying bookkeeping, tax compliance, payroll and financial management. The firm also prepares U.S. individual returns (Forms 1040 and 1040-NR). It works as a support resource alongside individualised legal or tax advice, not a substitute for it.
Frequently Asked Questions
What changed in federal tax rates and thresholds for 2026, including married filing jointly?
Tax year 2026 figures (filed in 2027) differ from this 2027 guide. For married filing jointly, the 2026 10% bracket ends at $24,800. See IRS Rev. Proc. 2025-32.
When do the 2027 brackets and standard deductions apply?
They apply to income earned in tax year 2027 and generally affect returns filed in 2028, subject to IRS filing guidance.
How do federal tax brackets work in 2027?
Federal income tax is marginal: only the slice of taxable income inside each bracket is taxed at that bracket's rate.
What is the 2027 standard deduction for each filing status?
It is $16,600 for single or married filing separately (MFS), $33,200 joint and $24,925 head of household. Age, blindness, senior or dependent rules may change the amount.
Can I take the standard deduction and itemise in the same year?
Generally no. Choose one method, comparing the standard deduction with eligible itemised expenses before filing. The senior deduction is available either way.
Do Australian residents use the same U.S. tax brackets?
Eligible U.S. taxpayers abroad generally use the same federal framework. Residency, citizenship, foreign income, credits, treaty rules and Australian obligations can change the final result.
