Line numbers here are for the 2025 tax year, the latest final forms. Check the current-year Form 1040 and Schedule 1 instructions before you file, because lines shift. This guide covers U.S. federal filing, including Australian-based taxpayers with U.S. filing obligations. Amounts are in U.S. dollars.
Key Takeaways
- Deductible traditional IRA contributions flow from Schedule 1, line 20 to Form 1040, line 10.
- Regular Roth contributions are after-tax and aren't entered as a deduction.
- Nondeductible traditional contributions go on Form 8606 to build basis.
- Forms 5498, 1099-R, 5329 and 8880 each serve a different purpose.
Where to Report IRA Contributions on Form 1040
For a deductible traditional IRA contribution, enter the allowable amount on Schedule 1, line 20. Schedule 1, line 26 totals all adjustments to income and carries to Form 1040, line 10. Confirm these numbers against the form for your tax year.
Deductible traditional IRA contributions
Only the deductible portion belongs on line 20. It's an adjustment to income, not an itemised deduction. The Form 1040 instructions point you to the IRA Deduction Worksheet, and Pub. 590-A Worksheets 1-1 and 1-2 handle modified AGI and a reduced deduction.
Roth IRA contributions
Per the Form 1040 instructions, Roth contributions aren't deductible, and a regular Roth contribution isn't reported on the return. Keep this separate from Roth conversions, Roth distributions, and the Saver's Credit.
Nondeductible traditional IRA contributions
Report the nondeductible amount on Form 8606, Part I, not on line 20. This documents your after-tax basis so you aren't taxed twice on withdrawal.
Contributions versus distributions
Contributions and distributions are reported in different places. IRA distributions appear on Form 1040, lines 4a (gross) and 4b (taxable), with Form 1099-R as the payer's statement.
How to Claim a Traditional IRA Deduction
Run through this checklist before filing:
- Filing status
- Taxable compensation or earned income
- Your workplace retirement-plan coverage, and your spouse's
- Modified adjusted gross income (MAGI)
Filing status and workplace-plan coverage
If you're covered by an employer plan, your deduction can be full, partial or zero depending on income. If you aren't covered but your spouse is, a higher phase-out range applies. Coverage is tested separately for each spouse.
MAGI and current-year thresholds
Compare your MAGI with the range for your filing status. Below the range, you deduct in full. Inside it, the deduction shrinks. Above it, none.
| Tax year | Covered, single / HOH | Covered, MFJ | Not covered, spouse covered (MFJ) |
|---|---|---|---|
| 2025 | $79,000-$89,000 | $126,000-$146,000 | $236,000-$246,000 |
| 2026 | $81,000-$91,000 | $129,000-$149,000 | $242,000-$252,000 |
For married filing separately and covered, the range is $0-$10,000.
Contribution limits and eligible compensation
Your contribution can't exceed the annual limit or your eligible compensation, whichever is lower. The limit applies to traditional and Roth IRAs combined.
| Contribution year | Under 50 | Age 50+ |
|---|---|---|
| 2025 | $7,000 | $8,000 |
| 2026 | $7,500 | $8,600 |
Living abroad matters here. The IRS says to add back excluded foreign earned income and the housing exclusion when figuring IRA limits, so excluded earnings don't simply vanish from the calculation.
Timing and tax-year designation
A 2025 contribution could be made by April 15, 2026, without extensions. If you contribute between January 1 and April 15, tell the IRA trustee which tax year it's for.
Taxpayers in Australia usually get an automatic two-month filing extension to June 15. Interest still runs from the regular due date, and the extension doesn't move the contribution deadline.
Completing the deduction and keeping records
The allowable amount moves from Schedule 1 to Form 1040. Confirm in the Form 1040 instructions or with a preparer whether you can claim the deduction while taking the standard deduction. Keep these records:
- Custodian contribution confirmations
- Form 5498
- Evidence of compensation
- Plan-coverage details and MAGI worksheets
When IRA Type or Transaction Changes the Reporting
"IRA contribution" can mean several things. The form depends on what actually happened.
Traditional versus Roth IRA contributions
Traditional contributions may be deductible, subject to the rules above. Roth contributions give no upfront deduction, but qualified withdrawals can be tax-free.
SEP and SIMPLE IRA contributions
Self-employed SEP and SIMPLE contributions use Schedule 1, line 16 ("Self-employed SEP, SIMPLE, and qualified plans"), not line 20. Sole proprietors and partners deduct their own contributions there. Employer SEP contributions generally aren't on an employee's W-2 unless made through salary reduction.
Rollovers, Roth conversions, and recharacterisations
A conversion counts as a distribution for reporting, even with the same trustee. Form 8606, Part II computes the taxable part after basis, and the amounts appear on Form 1040, lines 4a and 4b. A regular contribution can be recharacterised, but a Roth conversion made in 2018 or later can't be.
Excess contributions
Excess contributions face a 6% additional tax, calculated on Form 5329. Withdraw the excess plus earnings by the return due date, including extensions, to avoid it. You can also correct the excess within six months by filing an amended return.
Withdrawals and required minimum distributions
Withdrawals and RMDs aren't contributions. They're reported through Form 1099-R and Form 1040, lines 4a and 4b. The RMD age is currently 73.
Australian super is not an IRA
Pub. 590-A defines an IRA as a U.S. trust or custodial account. Contributions to an Australian super fund don't earn a Schedule 1 IRA deduction, and the treaty's pension article covers payments, not contribution deductions.
Other IRA Tax Forms You May Need
Form 5498
Your custodian files it with the IRS to report contributions, rollovers, conversions, required minimum distributions (RMDs), and year-end value. The form says "keep for your records." Contribution information is generally available by May 31 of the following year.
Form 8606
File Form 8606 to report:
- Part I: nondeductible traditional contributions and basis
- Part II: traditional-to-Roth conversions
- Part III: taxable part of Roth distributions
A regular Roth contribution alone doesn't require it. Spouses track basis separately.
Forms 1099-R, 5329, and 8880
- 1099-R reports distributions.
- 5329 calculates additional taxes, including excess contributions.
- 8880 claims the Saver's Credit on up to $2,000 of contributions (maximum credit $1,000, or $2,000 joint)
You can't claim the Saver's Credit if you're under 18, a student, or someone else's dependent.
A Practical Form 1040 Filing Checklist
Identify the IRA activity and gather documents
- Identify the IRA type and the transaction.
- Confirm the contribution year and amount.
- Collect custodian confirmations and Forms 5498 or 1099-R.
- Review prior Forms 8606 for existing basis.
Confirm eligibility and complete the correct forms
- Test deductibility against current IRS rules.
- Complete Form 8606 if needed.
- Enter only the allowable amount on Schedule 1, line 20.
- Confirm the amount reaches Form 1040, line 10.
Avoid common errors and know when to seek help
- Claiming a Roth contribution as a deduction
- Putting a nondeductible contribution on line 20
- Overlooking prior basis
- Using outdated line numbers
- Confusing a contribution with a distribution
- Trusting a Form 5498 reported for the wrong year or missing a conversion flag
Complex cases need care: multiple accounts, conversions, nondeductible contributions, or income from both Australian and U.S. sources. VJM Global's U.S.-compliant tax professionals prepare Form 1040 and other federal and state filings following IRS protocols.
This article is educational tax guidance, not personal tax advice. Consult a qualified professional about your situation.
Frequently Asked Questions
Where do I put my IRA contributions on my tax return 1040?
Deductible traditional contributions go on Schedule 1, line 20, flowing to Form 1040, line 10. Nondeductible traditional contributions go on Form 8606. Regular Roth contributions aren't reported as a deduction.
What is IRA deduction in Schedule 1?
It's the adjustment for an allowable traditional IRA deduction. For 2025 it's line 20, and the total of adjustments carries to Form 1040, line 10. Verify the line for your tax year.
Where do I see my IRA contributions?
Your custodian's Form 5498 and account statements show contributions. Your return shows only the resulting deduction or other reportable transaction.
Who is eligible for a Roth IRA?
You need taxable compensation and MAGI below the limit for your filing status. For 2026, single filers phase out at $153,000-$168,000 and joint filers at $242,000-$252,000. Check current IRS rules.
How does a Roth IRA affect taxes?
Contributions aren't deductible, but qualified withdrawals can be tax-free. Conversions and nonqualified distributions may trigger separate tax.
