Can Your 401(k) Match Go Into a Roth? Yes, but You Pay Tax Now

Yes, if your plan offers the option, your employer match can be put into a Roth account instead of a pre-tax one. The catch, according to the IRS, is that the match is then included in your gross income for the year it is added, even though no tax is taken out of your paycheck for it.

This comes from section 604 of the SECURE 2.0 Act, which applies to contributions made after December 29, 2022. If you are still learning how a match formula works, start with how an employer 401(k) match works. This article covers only the Roth choice.

1. The plan has to allow it

The IRS fact sheet FS-2024-29 says "plans can allow" employees to designate matching and nonelective contributions as Roth contributions. That wording means it is optional for the employer. Nothing in the two IRS documents opened for this article says every plan must offer it, so check your plan's summary or ask HR whether a Roth match election exists.

2. Four rules the IRS sets

Notice 2024-2, Q&As L-1 to L-3, lays out the conditions:

1. You must choose before the money lands. The designation has to be made no later than the time the contribution is allocated to your account, and it is irrevocable. You cannot move it to pre-tax afterward.
2. You need a chance to change your mind each year. If a plan permits the election, you must have an effective opportunity to make or change it at least once during each plan year.
3. You must be fully vested. The notice says a match can be designated Roth only if you are fully vested in matching contributions when it is allocated. If you are only partly vested, you may not designate any part of it as Roth.
4. It is kept separate. The notice says Roth match money is subject to separate accounting rules, like Roth elective deferrals.

The vesting rule is the one that surprises new employees. If your plan makes you wait before the match belongs to you, the Roth option does not apply to those dollars yet.

3. How the tax works

Notice 2024-2 (Q&A L-2) says a designated Roth match is includible in gross income for the taxable year in which it is allocated to your account. The notice adds that this holds even if the contribution is treated as made on the employer's last day of the prior tax year.

Here is an example. Assume you earn $60,000, contribute 6% ($3,600), and your plan matches 50% of that, so the match is $1,800. Assume a 22% federal marginal rate, which is an illustrative figure and not a rule.

The $396 is 22% of $1,800. If you are paid 24 times a year, spreading it out would be $16.50 per paycheck ($396 / 24). That spreading is a mental model only, because nothing is actually withheld.

4. No withholding, so plan for the bill

Q&A L-5 says designated Roth matching contributions are not wages for federal income tax withholding. That means your employer does not take tax from your pay for them. The notice states that you "may need to increase" your withholding or make estimated tax payments to avoid an underpayment penalty.

Payroll taxes work differently. Q&A L-6 says these contributions are not wages for FICA or FUTA when made to a 401(k) or 403(b) plan, and FS-2024-29 says they are generally not subject to Social Security or Medicare tax. The Roth choice does not add payroll tax, only income tax.

There is one exception worth knowing. Q&A L-7 says designated Roth nonelective contributions to an eligible governmental plan, such as a governmental 457(b), are subject to Social Security and Medicare tax when they are allocated, for employees who are covered by those taxes. That rule is for governmental plans, not for a private-employer 401(k).

5. Where you will see it on tax forms

Per Q&A L-9 and FS-2024-29, the amount is not on your Form W-2 as ordinary wages. The plan reports it on Form 1099-R for the year it was allocated, in boxes 1 and 2a, with code G in box 7. If you see a 1099-R from your 401(k) in a year when you took no distribution, a Roth match is one possible explanation. Keep it with your tax records so you do not skip it.

6. Who might choose it

The IRS documents do not say who should choose Roth, and neither does this article. The trade is simple, though: you pay tax on the $1,800 now in exchange for holding it in a Roth account. If you expect a higher bracket in retirement, or you are already making room in your budget for taxes, it may fit. If cash is tight this year, the unwithheld tax is a real cost.

7. Key takeaways

• The Roth match option exists only if your plan adds it.
• You must be fully vested, and you must choose before the contribution is allocated.
• The match is taxed as income in the year allocated, with no withholding.
• In the example, an $1,800 Roth match adds about $396 of federal tax at an assumed 22% rate.
• Expect Form 1099-R with code G, not a larger W-2.