Where to Report IRA Contributions on Form 1040

Where you report an IRA contribution on Form 1040 depends on what kind of contribution it is. A deductible Traditional IRA contribution goes on Schedule 1, Line 20, and the total from Schedule 1 flows to Form 1040, Line 10, reducing your adjusted gross income.¹ A nondeductible Traditional IRA contribution isn’t deducted anywhere; instead, you report it on Form 8606 to establish your basis. A Roth IRA contribution doesn’t appear on Form 1040 or any of its schedules, because it’s made with after-tax dollars and gives no current-year tax benefit on the return itself.²

The rest comes down to which of those three buckets your contribution falls into, plus a few extra forms if you qualify for a credit or owe a penalty.

Deductible Traditional IRA Contributions

The deduction is an above-the-line adjustment. You enter it on Schedule 1 (Additional Income and Adjustments to Income), Part II, Line 20. The total of Part II adjustments then transfers to Form 1040, Line 10, where it’s subtracted from your total income to arrive at AGI.¹ If you’re not sure how much of your contribution actually qualifies, the IRA Deduction Worksheet in the Schedule 1 instructions runs the calculation for you.

Whether you get a full deduction, a partial one, or none depends on your income and whether you or your spouse participates in a workplace retirement plan. If neither of you is covered, the contribution is fully deductible regardless of income. Once workplace coverage is in the picture, the deduction phases out. For 2026, the ranges are $81,000 to $91,000 for single filers covered at work; $129,000 to $149,000 for married-filing-jointly when the contributing spouse is covered; $242,000 to $252,000 when only the other spouse is covered; and $0 to $10,000 for married filing separately with workplace coverage.³ If your income sits above the top of your range, the contribution becomes nondeductible, and it moves to a different form.

Spousal contributions follow the same reporting rule. If you file jointly and contribute on behalf of a spouse with little or no income, the deduction (if allowed under the phase-outs above) still goes on Schedule 1, Line 20 of your joint return.⁴

Nondeductible Traditional IRA Contributions

When your income is too high for a deduction but you contribute to a Traditional IRA anyway, the contribution is nondeductible. It doesn’t appear on Schedule 1 and doesn’t reduce your AGI. You report it on Form 8606 (Nondeductible IRAs).²

Filing Form 8606 matters because it establishes your basis, the amount of after-tax money sitting in your Traditional IRA. When you eventually take distributions, the IRS uses your basis to figure how much of each withdrawal is taxable. Skip Form 8606 and the IRS has no record you already paid tax on those contributions, which means you can end up paying tax on the same money twice.

Part I of the form handles the tracking. Current-year nondeductible contributions go on Line 1, prior-year basis on Line 2, and the form carries your cumulative total forward.⁵ If you also took a distribution during the year, Part I applies the pro-rata rule, which treats every dollar coming out as a proportional mix of basis and earnings across all your Traditional IRAs combined. You can’t cherry-pick the nondeductible piece.

If your income is low enough that you’re not required to file a return at all, you still file Form 8606 on its own if you made nondeductible contributions. Sign it, include your address, and mail it to the same IRS address you’d use for a 1040.²

Backdoor Roth Conversions

A backdoor Roth uses both parts of Form 8606. Part I records the nondeductible Traditional contribution and calculates basis. Part II reports the conversion to Roth and determines how much of it is taxable.⁵ If your only Traditional IRA money is the nondeductible contribution you just made, the taxable amount is essentially zero, aside from any small earnings between contribution and conversion.

The conversion itself also appears on Form 1040. The gross distribution goes on Line 4a, and the taxable portion from Form 8606, Line 18, goes on Line 4b (zero if that’s what the form produced).⁵ If you have other pre-tax Traditional IRA balances, such as old rollovers from previous employers, the pro-rata rule makes a larger share of the conversion taxable.

Roth IRA Contributions

Regular Roth IRA contributions don’t get reported on Form 1040, on any schedule, or on Form 8606. The IRS states this directly in the Form 8606 instructions: you do not file Form 8606 just because you contributed to a Roth.² Part III of Form 8606 is for Roth distributions, not contributions.

Even though there’s nothing to report, keep your own records of every Roth contribution. Roth basis becomes important years later when you take distributions, because contributions can be withdrawn tax- and penalty-free at any time, and you’ll want documentation if a withdrawal is ever questioned.

One thing that can pull a Roth contribution back onto your return is exceeding the income limit. For 2026, Roth eligibility phases out between $153,000 and $168,000 of modified AGI for single and head-of-household filers; between $242,000 and $252,000 for married filing jointly; and between $0 and $10,000 for married filing separately.³ Contributing anyway creates an excess contribution, which is reported on Form 5329.

The Saver’s Credit

Lower-income taxpayers who contributed to an IRA may qualify for the Retirement Savings Contributions Credit, calculated on Form 8880.⁶ The credit is 50%, 20%, or 10% of your contribution depending on AGI and filing status, capped at $2,000 of contributions per person. The maximum credit is $1,000 for an individual or $2,000 for a couple filing jointly. It’s non-refundable, so it can zero out your tax but won’t produce a refund on its own.

The result from Form 8880 flows to Schedule 3 (Additional Credits and Payments), which feeds into your Form 1040 tax calculation.⁶ This is a separate benefit from any Traditional IRA deduction and is often the only tax benefit for a Roth contribution.

When Something Goes Wrong: Form 5329

Two situations pull IRA activity onto Form 5329: contributing more than you’re allowed, or withdrawing money too early.

Excess contributions carry a 6% penalty for every year the excess stays in the account.⁷ Excess Traditional IRA contributions are calculated in Part III of Form 5329; excess Roth contributions in Part IV.⁸ You can avoid the penalty by withdrawing the excess plus its earnings before your filing deadline (including extensions) for the year the excess was made.

Withdrawing from an IRA before age 59½ generally triggers a 10% additional tax on the taxable portion, calculated in Part I of Form 5329.⁸ Several exceptions apply, including first-time home purchase (up to $10,000 lifetime), qualified higher education expenses, total and permanent disability, unreimbursed medical expenses exceeding 7.5% of AGI, substantially equal periodic payments, and distributions to domestic abuse victims.⁹ If an exception applies, you still file the form and enter the exception code.

Whatever penalty tax Form 5329 produces transfers to Schedule 2 (Additional Taxes), Line 8, which then feeds your total tax on Form 1040.⁸ Spouses who both owe penalties file separate Form 5329s, and the combined amount lands on a single Schedule 2.

1
Internal Revenue Service. 2025 Schedule 1 (Form 1040) – Additional Income and Adjustments to Income
2
Internal Revenue Service. 2025 Instructions for Form 8606 – Nondeductible IRAs
3
Internal Revenue Service. 401(k) Limit Increases to $24,500 for 2026, IRA Limit Increases to $7,500
4
Internal Revenue Service. Publication 590-A, Contributions to Individual Retirement Arrangements (IRAs)
5
Internal Revenue Service. Instructions for Form 8606
6
Internal Revenue Service. Form 8880 – Credit for Qualified Retirement Savings Contributions
7
Office of the Law Revision Counsel. 26 USC 4973 – Tax on Excess Contributions to Certain Tax-Favored Accounts
8
Internal Revenue Service. 2025 Instructions for Form 5329 – Additional Taxes on Qualified Plans (Including IRAs) and Other Tax-Favored Accounts
9
Internal Revenue Service. Retirement Topics – Exceptions to Tax on Early Distributions