Traditional IRAs use pre-tax contributions, but the rules depend on your income and whether you have a workplace retirement plan

A traditional IRA lets you contribute money that reduces your taxable income in the year you contribute it — that is the pre-tax part. When you withdraw the money in retirement, you pay income tax on the full amount. However, not all of your contribution is always pre-tax. If you earn above a certain income threshold and have access to a workplace 401(k) or similar plan, the IRS phases out or eliminates your pre-tax deduction, and some or all of your contribution becomes after-tax instead.

The income limits that determine whether your contribution is deductible change each year. For 2024, if you are single and covered by a workplace retirement plan, your pre-tax deduction begins to phase out at $77,000 of modified adjusted gross income (MAGI) and disappears entirely at $87,000. If you are married filing jointly and your spouse has a workplace plan, the phase-out range is $123,000 to $143,000. If neither you nor your spouse has a workplace plan, there is no income limit — your contribution is always pre-tax, no matter how much you earn.

Key Takeaways

  • Traditional IRA contributions are pre-tax if you have no workplace retirement plan, or if your income is below the IRS phase-out threshold for your filing status.
  • If your income falls within the phase-out range and you have a workplace plan, part or all of your contribution becomes after-tax and does not reduce your current year taxes.
  • The income limits that trigger the phase-out change annually and depend on whether you are single, married filing jointly, or married filing separately.
  • You can contribute to a traditional IRA and a Roth IRA in the same year, but your total contribution across both accounts cannot exceed the annual limit ($7,000 in 2024 for those under 50).

When your traditional IRA contribution is fully deductible

Your contribution is fully pre-tax if you meet either of these conditions: you have no access to a workplace retirement plan (such as a 401(k), 403(b), or pension), or your income is below the phase-out threshold for your filing status.

If you are self-employed and have no employees, a Solo 401(k) or SEP IRA counts as a workplace plan for IRS purposes, which means the income limit applies to you. If you are married and only one spouse has a workplace plan, the income limit applies only to the spouse with the plan; the other spouse can deduct their full contribution as long as their household MAGI is below $230,000 (for 2024).

How the income phase-out reduces your deduction

If your income falls within the phase-out range, the IRS reduces your pre-tax deduction dollar-for-dollar as your income rises. For example, in 2024, a single person covered by a workplace plan with MAGI of $82,000 is $5,000 into the $10,000 phase-out range ($77,000 to $87,000). The IRS reduces the deduction by roughly $500 for every $1,000 of income in the phase-out zone, so this person could deduct about $3,500 of a $7,000 contribution and would owe tax on the remaining $3,500 as an after-tax contribution.

The exact calculation is more precise than this rough example, but the principle is the same: as your income climbs through the phase-out range, your deductible amount shrinks. Once your income exceeds the upper limit of the range, you cannot deduct any of your contribution that year.

After-tax contributions and the pro-rata rule

If you make an after-tax contribution to a traditional IRA because your income is too high, you must report it on Form 8606 when you file your taxes. The form tells the IRS how much of your contribution was after-tax so you do not pay tax on it again when you withdraw it.

The complication arises if you have other traditional IRAs, SEP IRAs, or SIMPLE IRAs with pre-tax money in them. The IRS applies the pro-rata rule, which means when you withdraw money from any traditional IRA, the withdrawal is treated as coming proportionally from both pre-tax and after-tax balances. This can create an unexpected tax bill if you are trying to withdraw only your after-tax contributions. Many people in this situation convert their pre-tax IRA balances to a Roth IRA first to avoid the pro-rata rule, though that conversion itself triggers a tax bill in the year it happens.

Comparing traditional and Roth IRA tax treatment

A Roth IRA works the opposite way: contributions are always after-tax (you get no deduction), but withdrawals in retirement are tax-free. Roth contributions have their own income limits. For 2024, single filers can contribute the full amount if their MAGI is below $146,000, with a phase-out up to $161,000. Married filing jointly can contribute fully up to $230,000, with a phase-out to $240,000.

If your income is too high for a Roth but too high to deduct a traditional IRA contribution, you have a few options: contribute to a non-deductible traditional IRA (and track the after-tax portion carefully), contribute to a workplace plan if one is available to you, or use the "backdoor Roth" strategy, which involves contributing to a non-deductible traditional IRA and then converting it to a Roth. The backdoor Roth has no income limit, but it triggers the pro-rata rule if you have other traditional IRA balances.

How to learn about your contribution is deductible

The IRS publishes a worksheet each year in the instructions to Form 1040 that walks you through the calculation. You can also use the IRS interactive tax assistant on irs.gov, which asks you questions about your filing status, income, and workplace plan access and tells you whether your contribution is deductible.

If you are unsure whether you have a workplace plan, check your most recent pay stub or ask your employer's benefits department. The plan does not have to be one you contribute to — if your employer offers one and you are may be able to access to join, even if you chose not to, it counts for the income limit test.

Frequently Asked Questions

Can I deduct a traditional IRA contribution if my spouse has a 401(k) but I don't?

It depends on your household income. If you are married filing jointly and your spouse has a workplace plan, you can deduct your full contribution if your combined MAGI is below $230,000 (for 2024). The phase-out range for you is $230,000 to $240,000. Your spouse's access to a plan triggers the limit, but your own lack of a plan does not.

What happens if I contribute to a traditional IRA and then my income turns out to be too high?

You can withdraw the contribution and any earnings on it before your tax filing deadline (including extensions) without penalty. The earnings are taxable in the year of withdrawal, but the contribution itself is not. This is called a "return of excess contribution." You must report it on Form 8606.

If I make an after-tax contribution to a traditional IRA, do I pay tax twice on it?

No. You report the after-tax portion on Form 8606, and when you withdraw it in retirement, that portion comes out tax-free. You only pay tax on the pre-tax contributions and any earnings. The form ensures the IRS knows not to tax the after-tax part again.

Does a Solo 401(k) count as a workplace plan for the traditional IRA deduction limit?

Yes. If you are self-employed with no employees and have a Solo 401(k), the IRS treats it as a workplace plan, and the traditional IRA income limit applies to you. This is true even if you do not contribute to the Solo 401(k) in a given year — simply having the plan available makes you subject to the limit.