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A traditional 401(k) and a Roth 401(k) are tax-advantaged retirement plans that can help you save for retirement. While both types of accounts follow similar rules — they have the same contribution limits, for example — the impact of a Roth 401(k) vs. traditional 401(k) on your tax situation, now and in the future, may be quite different.
In brief: The contributions you make to a traditional 401(k) are deducted from your gross income, and thus may help lower your tax bill. But you’ll owe taxes on the money you withdraw later for retirement.
Conversely, you contribute after-tax funds to a Roth 401(k) and can typically withdraw the money tax free in retirement — but you don’t get a tax break now.
To help choose between a Roth 401(k) vs. a traditional 401(k) — or whether it might make sense to invest in both, if your employer offers that option — it helps to know what these accounts are all about.
5 Key Differences Between Roth 401(k) vs Traditional 401(k)
Before deciding on a Roth 401(k) or traditional 401(k), it’s important to understand the differences between each account, and to consider the tax benefits of each in light of your own financial plan. The timing of the tax advantages of each type of account is also important to weigh.
1. How Each Account is Funded
• A traditional 401(k) allows individuals to make pre-tax contributions. These contributions are typically made through elective salary deferrals that come directly from an employee’s paycheck and are deducted from their gross income.
• Employees contribute to a Roth 401(k) also generally via elective salary deferrals, but they are using after-tax dollars. So the money the employee contributes to a Roth 401(k) cannot be deducted from their current income.
💡 Quick Tip: The advantage of opening a Roth IRA and a tax-deferred account like a 401(k) or traditional IRA is that by the time you retire, you’ll have tax-free income from your Roth, and taxable income from the tax-deferred account. This can help with tax planning.
2. Tax Treatment of Contributions
• The contributions to a traditional 401(k) are tax-deductible, which means they can reduce your taxable income now, and they grow tax-deferred (but you’ll owe taxes later).
• By contrast, since you’ve already paid taxes on the money you contribute to a Roth 401(k), the money you contribute isn’t deductible from your gross income, and withdrawals are generally tax free (some exceptions below).
3. Withdrawal Rules
• You can begin taking qualified withdrawals from a traditional 401(k) starting at age 59 ½, and the money you withdraw is taxed at ordinary income rates.
• To withdraw contributions + earnings tax free from a Roth 401(k) you must be 59 ½ and have held the account for at least five years (often called the 5-year rule). If you open a Roth 401(k) when you’re 57, you cannot take tax-free withdrawals at 59 ½, as you would with a traditional 401(k). You’d have to wait until five years had passed, and start tax-free withdrawals at age 62.
4. Early Withdrawal Rules
• Early withdrawals from a 401(k) before age 59 ½ are subject to tax and a 10% penalty in most cases, but there are some exceptions where early withdrawals are not penalized, including certain medical expenses; a down payment on a first home; qualified education expenses.
You may also be able to take a hardship withdrawal penalty-free, but you need to meet the criteria, and you would still owe taxes on the money you withdrew.
• Early withdrawals from a Roth 401(k) are more complicated. You can withdraw your contributions at any time, but you’ll owe tax proportional to your earnings, which are taxable when you withdraw before age 59 ½.
For example: If you have $100,000 in a Roth 401(k), including $90,000 in contributions and $10,000 in taxable gains, the gains represent a 10% of the account. Therefore, if you took a $20,000 early withdrawal, you’d owe taxes on 10% to account for the gains, or $2,000.
5. Required Minimum Distribution (RMD) Rules
With a traditional 401(k), individuals must take required minimum distributions starting at age 73, or face potential penalties. While Roth 401(k)s used to have RMDs, as of January 2024, they no longer do. That means you are not required to withdraw RMDs from a Roth 401(k) account.
For a quick side-by-side comparison, here are the key differences of a Roth 401(k) vs. traditional 401(k):
Traditional 401(k) | Roth 401(k) |
---|---|
Funded with pre-tax dollars. | Funded with after-tax dollars. |
Contributions are deducted from gross income and may lower your tax bill. | Contributions are not deductible. |
All withdrawals taxed as income. | Withdrawals of contributions + earnings are tax free after 59 ½, if you’ve had the account for at least 5 years. (However, matching contributions from an employer made with pre-tax dollars are subject to tax.) |
Early withdrawals before age 59 ½ are taxed as income and are typically subject to a 10% penalty, with some exceptions. | Early withdrawals of contributions are not taxed, but earnings may be taxed and subject to a 10% penalty. |
Account subject to RMD rules starting at age 73. | No longer subject to RMD rules as of January 2024. |
Bear in mind that a traditional 401(k) and Roth 401(k) also share many features in common:
• The annual contribution limits are the same for a 401(k) and a Roth 401(k). For 2024, the total amount you can contribute to these employer-sponsored accounts is $23,000; if you’re 50 and older you can save an additional $7,500 for a total of $30,500. This is an increase over the 2023 limit, which was capped at $22,500 ($30,000 if you’re 50 and older).
• For both accounts, employers may contribute matching funds up to a certain percentage of an employee’s salary.
• In 2024, total contributions from employer and employee cannot exceed $69,000 ($76,500 for those 50 and up). In 2023, total contributions from employer and employee cannot exceed $66,000 ($73,500 for those 50 and up).
• Employees may take out a loan from either type of account, subject to IRS restrictions and plan rules.
Because there are certain overlaps between the two accounts, as well as many points of contrast, it’s wise to consult with a professional when making a tax-related plan.
Recommended: Different Types of Retirement Plans, Explained
How to Choose Between a Roth and a Traditional 401(k)
In some cases it might make sense to contribute to both types of accounts (more on that below), but in other cases you may want to choose either a traditional 401(k) or a Roth 401(k) to maximize the specific advantages of one account over another. Here are some considerations.
When to Pay Taxes
Traditional 401(k) withdrawals are taxed at an individual’s ordinary income tax rate, typically in retirement. As a result these plans can be most tax efficient for those who will have a lower marginal rate after they retire than they did while they were working.
In other words, a traditional 401(k) may help you save on taxes now, if you’re in a higher tax bracket — and then pay lower taxes in retirement, when you’re ideally in a lower tax bracket.
On the other hand, an investor might look into the Roth 401(k) option if they feel that they pay lower taxes now than they will in retirement. In that case, you’d potentially pay lower taxes on your contributions now, and none on your withdrawals in retirement.
Your Age
Often, younger taxpayers may be in a lower tax bracket. If that’s the case, contributing to a Roth 401(k) may make more sense for the same reason above: because you’ll pay a lower rate on your contributions now, but then they’re completely tax free in retirement.
If you’re older, perhaps mid-career, and in a higher tax bracket, a traditional 401(k) might help lower your tax burden now (and if your tax rate is lower when you retire, even better, as you’d pay taxes on withdrawals but at a lower rate).
Where You Live
The tax rates where you live, or where you plan to live when you retire, are also a big factor to consider. Of course your location some years from now, or decades from now, can be difficult to predict (to say the least). But if you expect that you might be living in an area with lower taxes than you are now, e.g. a state with no state taxes, it might make sense to contribute to a traditional 401(k) and take the tax break now, since your withdrawals may be taxed at a lower rate.
💡 Quick Tip: Before opening any investment account, consider what level of risk you are comfortable with. If you’re not sure, start with more conservative investments, and then adjust your portfolio as you learn more.
The Benefits of Investing in Both a Roth 401(k) and Traditional 401(k)
If an employer offers both a traditional and Roth 401(k) options, employees might have the option of contributing to both, thus taking advantage of the pros of each type of account. In many respects, this could be a wise choice.
Divvying up contributions between both types of accounts allows for greater flexibility in tax planning down the road. Upon retirement, an individual can choose whether to withdraw money from their tax-free 401(k) account or the traditional, taxable 401(k) account each year, to help manage their taxable income.
It is important to note that the $23,000 contribution limit ($30,500 for those 50 and older) for 2024 is a total limit on both accounts.
So, for instance, you might choose to save $13,500 in a traditional 401(k) and $9,500 in a Roth 401(k) for the year. You are not permitted to save $23,000 in each account.
What’s the Best Split Between Roth and Traditional 401(k)?
The best split between a Roth 401(k) and a traditional 401(k) depends on your individual financial situation and what might work best for you from a tax perspective. You may want to do an even split of the $23,000 limit you can contribute in 2024. Or, if you’re in a higher tax bracket now than you expect to be in retirement, you might decide that it makes more sense for you to put more into your traditional 401(k) to help lower your taxable income now. But if you expect to be in a higher income tax bracket in retirement, you may want to put more into your Roth 401(k).
Consider all the possibilities and implications before you decide. You may also want to consult a tax professional.
The Takeaway
Employer-sponsored Roth and traditional 401(k) plans offer investors many options when it comes to their financial goals. Because a traditional 401(k) can help lower your tax bill now, and a Roth 401(k) generally offers a tax-free income stream later — it’s important for investors to consider the tax advantages of both, the timing of those tax benefits, and whether these accounts have to be mutually exclusive or if it might benefit you to have both.
When it comes to retirement plans, investors don’t necessarily have to decide between a Roth or traditional 401(k). Some might choose one of these investment accounts, while others might find a combination of plans suits their goals. After all, it can be difficult to predict your financial circumstances with complete accuracy — especially when it comes to tax planning — so you may decide to hedge your bets and contribute to both types of accounts, if your employer offers that option.
Another step to consider is a 401(k) rollover, where you move funds from an old 401(k) into an IRA. When you do a 401(k) rollover it can help you manage your retirement funds.
Ready to invest for your retirement? It’s easy to get started when you open a traditional or Roth IRA with SoFi. SoFi doesn’t charge commissions, but other fees apply (full fee disclosure here).
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FAQ
Is it better to contribute to 401(k) or Roth 401(k)?
Whether it’s better to contribute to a traditional 401(k) or Roth 401(k) depends on your particular financial situation. In general, if you expect to be in a lower tax bracket in retirement, a traditional 401(k) may make more sense for you since you’ll be able to deduct your contributions when you make them, which can lower your taxable income, and then pay taxes on the money in retirement, when you’re in a lower income tax bracket.
But if you’re in a lower tax bracket now than you think you will be later, a Roth 401(k) might be the preferred option for you because you’ll generally withdraw the money tax-free in retirement.
Can I max out both 401(k) and Roth 401(k)?
No, you cannot max out both accounts. Per IRS rules, the annual 401(k) limits apply across all your 401(k) accounts combined. So for 2024, you can contribute a combined amount up to $23,000 (or $30,500 if you’re 50 or older) to your Roth 401(k) and your traditional 401(k) accounts.
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