Contributing to Both a 401(k) and Roth IRA in the Same Year

Yes, you can contribute to both a 401(k) and a Roth IRA in the same year

The IRS allows you to fund both accounts simultaneously. Your 401(k) contributions and Roth IRA contributions are tracked separately, so maxing out one does not prevent you from funding the other. However, there is a catch with Roth IRAs: your ability to contribute depends on your income level, and that income includes money you earned from your 401(k) contributions.

The real constraint most people face is not the rules but their own cash flow. Contributing the maximum to both accounts in a single year requires significant income. For 2024, the 401(k) limit is $23,500 (or $31,000 if you are 50 or older), and the Roth IRA limit is $7,000 (or $8,000 if you are 50 or older). That is a combined $30,500 minimum before accounting for employer matches or catch-up contributions.

Key Takeaways

You can contribute to a 401(k) and Roth IRA in the same calendar year without violating IRS rules.
Roth IRA contributions are limited by your modified adjusted gross income (MAGI), which includes your 401(k) contributions, so high earners may not be able to fund a Roth IRA directly.
Your 401(k) contribution limit and Roth IRA contribution limit are separate pools of money, so funding one does not reduce how much you can put in the other.
If your income exceeds the Roth IRA income limits, you may be able to use a backdoor Roth strategy, though this involves additional steps and tax considerations.

How income limits affect your Roth IRA contribution

The IRS sets income thresholds for direct Roth IRA contributions. These thresholds depend on your filing status and your modified adjusted gross income (MAGI). For 2024, if you are single, you can contribute the full amount if your MAGI is under $146,000. The contribution phases out between $146,000 and $161,000, meaning you can contribute less than the full amount. Above $161,000, you cannot contribute directly to a Roth IRA.

Your MAGI includes your 401(k) contributions, so funding your 401(k) does not lower the income that counts toward Roth IRA limits. If you earn $150,000 and contribute $23,500 to your 401(k), your MAGI for Roth purposes is still $150,000, not $126,500. This means high earners who max out their 401(k) may find themselves above the Roth IRA income limit even if they thought they had room to contribute.

If you are married and file jointly, the income limits are higher: you can contribute the full amount if your MAGI is under $230,000, with a phase-out range up to $240,000. If you are married and file separately, the limits are much lower and phase out almost when ready.

The backdoor Roth option when income is too high

If your income exceeds the Roth IRA limit, you can use a strategy called a backdoor Roth. This involves contributing money to a traditional IRA (which has no income limits) and then converting it to a Roth IRA. The conversion itself is allowed regardless of income.

The backdoor Roth process works in two steps. First, you contribute to a traditional IRA. Second, you convert that traditional IRA to a Roth IRA, either when ready or shortly after. The conversion is a taxable event: you owe income tax on any earnings that accumulated in the traditional IRA between contribution and conversion, and on any pre-tax money already in the account.

This strategy is common among high earners but requires careful record-keeping. If you already have a traditional IRA with pre-tax money in it, a backdoor Roth conversion can trigger unexpected taxes. You will need to report the conversion on your tax return using Form 8606, and your tax preparer should be aware of the strategy to avoid costly mistakes.

Employer match does not count toward your personal contribution limit

When your employer contributes to your 401(k) through a match or profit-sharing, that money does not count toward your $23,500 contribution limit. Only the money you personally contribute counts. This means you can contribute $23,500 of your own money, and your employer can add more on top without affecting your Roth IRA contribution room.

The total amount that can go into your 401(k) in a single year (your contributions plus employer contributions plus any catch-up contributions) is $69,000 for 2024. But again, only your personal contributions count toward the $23,500 limit that might affect your Roth IRA strategy.

Tax treatment differs between the two accounts

A 401(k) is typically a pre-tax account, meaning your contributions reduce your taxable income for the year. A Roth IRA is funded with after-tax money, so your contributions do not lower your taxes now. However, Roth IRA withdrawals in retirement are tax-free, while 401(k) withdrawals are taxed as ordinary income.

This difference matters when you are deciding how much to put in each account. If you expect to be in a higher tax bracket in retirement, a Roth IRA may be more valuable. If you expect to be in a lower bracket, a traditional 401(k) may save you more in taxes overall. Contributing to both accounts gives you tax diversification: some money grows tax-deferred (401(k)), and some grows tax-free (Roth IRA).

Contribution important date and timing

Your 401(k) contributions must be made by December 31 of the year you want them to count for. If you are self-employed or have a solo 401(k), the important date is the same: December 31, though you have until your tax filing important date (usually April 15 of the following year) to make employer contributions if you have not yet filed your return.

Roth IRA contributions have a later important date. You can contribute to a Roth IRA for a given tax year until the tax filing important date of the following year, usually April 15. This means you have until April 15, 2025, to contribute to your 2024 Roth IRA. This extra time can be useful if you are waiting to see your final income for the year before deciding how much to contribute to a Roth IRA.

What happens if you over-contribute

If you contribute more than the limit to either account, the IRS charges a 6% excise tax on the excess amount each year it remains in the account. For a 401(k), your employer's payroll system usually prevents over-contributions by stopping defeductions once you hit the limit. For a Roth IRA, you have to monitor your contributions yourself.

If you discover an over-contribution to a Roth IRA, you can withdraw the excess and any earnings on it before your tax filing important date to avoid the penalty. The earnings portion of the withdrawal is taxable, but removing the excess contribution itself avoids the 6% penalty. After the filing important date, the penalty applies for each year the excess remains.

Frequently Asked Questions

Does contributing to a 401(k) reduce how much I can put in a Roth IRA?

Not directly. Your 401(k) and Roth IRA contribution limits are separate. However, your 401(k) contributions count toward your income for Roth IRA income limit purposes, so they can push you over the threshold where you can no longer contribute to a Roth IRA directly.

Can I contribute to a Roth IRA if my employer does not offer a 401(k)?

Yes. The ability to contribute to a Roth IRA depends only on your income level, not on whether you have access to a 401(k). If your income is below the Roth IRA limit, you can contribute regardless of your employer's retirement plan.

What is the backdoor Roth, and do I need a tax professional to do it?

A backdoor Roth is a conversion of a traditional IRA to a Roth IRA, used by high earners who exceed Roth income limits. It is legal but involves tax reporting on Form 8606. If you already have pre-tax money in a traditional IRA, the conversion can trigger unexpected taxes, so working with a tax professional is often worth the cost.

If I max out my 401(k), can I still contribute to a Roth IRA?

You can contribute to a Roth IRA if your income is below the limit, even if you have maxed out your 401(k). However, maxing out your 401(k) increases your income for Roth purposes, which may push you over the income limit if you were close to it.

Can I move money between my 401(k) and Roth IRA?

You cannot transfer money directly from a 401(k) to a Roth IRA while you are still employed. After you leave your job, you can roll over your 401(k) to a traditional IRA and then convert it to a Roth IRA, though the conversion is a taxable event.

This guide is for general information only and is not medical, financial, legal, or other professional advice. For decisions specific to your situation, consult a qualified professional. See our Editorial Policy.