This guide is written for Australian-based taxpayers with US tax obligations. Australian income tax and other levies must meet US foreign tax credit rules before they go on the form. We cover who files, what to verify for 2026, how the limitation works, how to complete each part, and which records to keep.
Key Takeaways
- Match form materials to the tax year; a 2025 return filed in 2026 differs from a 2026 return.
- Sort income and foreign taxes into the right category, such as general or passive.
- Cap the credit at the lower of qualifying foreign tax and US tax on that foreign income.
- Confirm Australian source documents, exchange rates, carryovers, refunds and Form 2555 before filing.
What Is IRS Form 1116 and Who Needs To File It?
What Form 1116 does
Form 1116 is the IRS form that individuals, estates and trusts use to claim a foreign tax credit for qualifying foreign taxes paid or accrued on foreign-source income. The IRS says the credit reduces double taxation, and it is limited to the eligible foreign tax or the attributable US tax, whichever is smaller.
Credit, deduction and refund work differently:
- Credit: reduces your US tax, reported in the nonrefundable credits section of Schedule 3.
- Deduction: eligible foreign income taxes can instead be itemised on Schedule A. The credit-or-deduction choice generally applies to all qualified foreign taxes for the year.
- Refund: Form 1116 does not return Australian tax, and it does not refund foreign tax above the permitted US credit.
Who may need it
US citizens generally face US tax on worldwide income, and resident aliens follow the same general credit rules. Living in Australia alone does not establish eligibility.
Nonresident aliens generally cannot claim the credit, with limited exceptions. Estates and trusts also use Form 1116.
An Australian-based company should not assume Form 1116 applies just because it paid Australian tax. Corporations generally use Form 1118. An individual owner who makes a section 962 election may need Form 1118 for CFC-level taxes while still using Form 1116 for other qualifying taxes.
Which foreign taxes may qualify
Publication 514 sets four tests. The tax must:
- Be imposed on you
- Be paid or accrued
- Be a legal and actual foreign tax liability
- Be an income tax or a tax in lieu of one
Refundable or recoverable excess tax is not automatically eligible.
How common Australian payments are treated:
| Payment | Treatment |
|---|---|
| Australian income tax (including capital gains tax) | Generally eligible, subject to US limits |
| GST | Consumption tax, not an income tax |
| Medicare levy and surcharge | US creditability not conclusively established; get professional advice |
| Superannuation guarantee | Employer retirement contributions, not an income-tax payment |
| HELP/HECS repayments | Loan repayments, not income tax |
| Penalties, fines, interest | Not creditable |
The US-Australia social security agreement also affects creditability. Publication 514 disallows a credit or deduction for foreign social security taxes paid to an agreement country.
What Does "2026" Mean for Form 1116?
Tax year versus filing year
This is the most common source of confusion. As of the latest IRS listings, the current released Form 1116 and instructions are the 2025 revisions, posted in January 2026. Those are what you use for a 2025 return filed in 2026.
A 2026 draft form and draft instructions also exist. The IRS says not to file draft forms. A 2026 tax-year return, filed in 2027, will use the final 2026 version once released.
Finding the official instructions
Start at the IRS Form 1116 page and open the form and instruction PDFs from there. Check the revision year printed on each document. Do not rely on an old PDF, a software screen or a third-party article if the IRS has issued a later revision.
2026 changes to verify
Public Law 119-21 (July 4, 2025) changed several foreign tax credit rules for tax years beginning after December 31, 2025:
- Deduction allocation for foreign-source net CFC tested income changes under section 904(b)(5).
- The section 960(d) deemed-paid percentage rises from 80% to 90%. This targets CFC-related taxes, not an individual's directly paid Australian income tax.
- Certain US-produced inventory sold abroad through a foreign office can get foreign-source treatment, capped at 50%.
The 2026 draft instructions also describe NCTI replacing GILTI and add Part II reporting for taxes on previously taxed earnings distributions. Proposed regulations REG-117273-25 on deduction allocation are proposals only, not final rules. Treat drafts and proposals separately from confirmed law.
How to Calculate the Foreign Tax Credit on Form 1116
Separate income into categories
Use a separate Form 1116 for each category. The 2025 form lists seven: section 951A, foreign branch, passive, general, section 901(j), certain income re-sourced by treaty, and lump-sum distributions.
For Australian taxpayers, wages and active business income usually land in the general category. Australian dividends, interest, royalties, rents and investment gains often fall in the passive category. Check exceptions for pensions, high-taxed income and business structures.
Apply the limitation
The simplified formula:
US tax x (foreign-source taxable income / worldwide taxable income)
Your credit is the lesser of eligible foreign tax and this limit, calculated per category. Use net taxable income for the category, not gross Australian receipts.
Publication 514 offers an IRS hypothetical for general-category income:
| Year | Limit | Qualified foreign tax | Result |
|---|---|---|---|
| 2024 | US$200 | US$100 | US$100 unused limitation |
| 2025 | US$300 | US$500 | US$200 unused foreign tax |
Here US$100 of the 2025 excess goes back to 2024 and US$100 carries forward. This is illustrative only, not a result for any taxpayer.
Convert foreign amounts to US dollars
- Taxes paid basis: use the exchange rate on the payment or withholding date. A later refund uses the original payment-date rate.
- Taxes accrued basis: generally use the average rate for the tax year the taxes relate to, with exceptions for late payments, early payments and inflationary currencies.
The IRS has no official exchange rate and generally accepts consistently used posted rates. The ATO publishes rates drawn from the RBA, but that does not override the US paid or accrued rule. Assessments, instalments, amended assessments and refunds can all change the creditable amount.
Excess credits and later adjustments
Unused credits generally carry back one year, then forward ten years, earliest year first. Section 951A-category taxes have no carryover. Schedule B tracks carryovers.
If a foreign tax is later refunded or reassessed, Schedule C reports the redetermination. If US tax changes for an earlier year, file Form 1040-X with a revised Form 1116. Reduced foreign tax notification is generally due by the original return's due date, including extensions.
How to Complete Form 1116: Step-by-Step
Gather documents first
- Your US return and prior-year Forms 1116
- Australian tax assessments and payment evidence
- Payslips, employer summaries and brokerage statements
- Dividend, interest and business account records
- Carryover schedules and exchange-rate support
- Treaty documentation where relevant
Sort them by income category, jurisdiction, payment or accrual date and tax year.
Part I: income and deductions
Pick the category first. Wages, business income, dividends and interest generally cannot share one form. Part I, lines 1a to 7, reports foreign-source income and allocable deductions, so apply sourcing rules and allocate expenses consistently.
Part II: foreign taxes
Part II, line 8, lists taxes by country, date paid or accrued, foreign-currency amount and US-dollar amount. Do not group by income type alone. Reconcile each Australian document against what was legally owed, paid, refundable or treaty-limited.
Part III: the credit
Lines 9 to 24 cover available taxes and the limitation. Work through foreign-source taxable income, worldwide taxable income, US tax, adjustments and carryovers. These line references apply to the 2025 form. The 2026 draft reformats Part II, so follow the current IRS line descriptions.
Part IV and transfer
Part IV, lines 25 to 35, summarises separate credits. The 2025 instructions require lines 25 to 32 even if you file only one Form 1116. The final credit goes to Schedule 3 (Form 1040), line 1. Cross-check that figure against your return before filing.
Common Errors, Records, and Choosing the Right Relief
Common mistakes
- Using the wrong tax-year version
- Claiming a non-creditable levy such as GST or penalties
- Mixing income categories
- Using unsupported exchange rates
- Overlooking treaty limits
- Claiming tax on income excluded under Form 2555
- Failing to track refunds or reassessments
A high tax payment or an Australian tax statement alone does not establish the credit. You must support the tax's character, legal liability, payment status, source, category and limitation.
Credit versus other options
Under section 911(d)(6), you cannot claim a credit or deduction for foreign taxes allocable to income excluded under the foreign earned income or housing exclusion. Model the credit, the exclusion and the deduction before choosing.
Keep self-employment separate. The Social Security Administration states that self-employed US citizens residing in Australia are exempt from US Social Security coverage under the agreement. That is coverage relief, not a Form 1116 credit.
Records and professional review
Keep these for as long as they may be material to tax administration:
- Australian assessments and payment evidence
- Exchange-rate records and category calculations
- Prior-year carryovers and foreign refund records
- Copies of filed forms
If you have several categories, carryovers or foreign exchange records to manage, VJM Global offers cross-border tax and accounting support, including US individual return preparation, for Australian-based clients.
Frequently Asked Questions
How do I complete Form 1116 to claim the foreign tax credit?
Gather your documents, choose the income category, and complete Parts I to IV. Calculate the limitation, then carry the final credit to Schedule 3 (Form 1040), line 1.
How do I calculate my foreign tax credit?
The credit is generally the lesser of qualifying foreign taxes and the category limitation. Sourcing, deduction allocation, currency conversion and carryovers all affect the result.
Who needs to file Form 1116?
US taxpayers with qualifying foreign taxes on foreign-source income generally need Form 1116. Corporations use Form 1118 instead. Some small passive-income claims can skip the form.
Can I claim a foreign tax credit without filing Form 1116?
Yes, under the section 904(j) election if all foreign income is passive, reported on qualified payee statements, and creditable taxes are $300 or less ($600 joint). You lose carryovers for that year; estates and trusts cannot elect.
Where can I find IRS Form 1116 instructions for 2026?
Use the official IRS Form 1116 page and the instruction PDF. Currently these are 2025 revisions for returns filed in 2026. The 2026 version is still a draft.
