Traditional vs. Roth 401(k): How to Choose the Right One

Many employers now offer both traditional and Roth 401(k) options. The choice matters — it determines whether you pay taxes on your retirement savings now or later. Here's a clear framework to pick the right one for your situation.

The Core Difference

Traditional 401(k): Contributions are pre-tax. You reduce your taxable income today, money grows tax-deferred, and you pay income tax when you withdraw in retirement.

Roth 401(k): Contributions are after-tax. You get no tax break today, money grows tax-free, and qualified withdrawals in retirement are completely tax-free.

When Traditional Is Better

• You're in a high tax bracket now and expect to be in a lower one in retirement.
• You're in your peak earning years (40s–50s) and want to reduce current taxable income.
• You expect to have significant retirement income from other sources (pension, rental income, Social Security) that would push you into a lower bracket.
• You need to reduce your AGI now to qualify for certain deductions or credits.

When Roth Is Better

• You're early in your career with lower income — paying taxes now at a lower rate is advantageous.
• You expect your tax rate to be higher in retirement (due to income growth or rising tax rates).
• You want tax diversification — having both taxable and tax-free retirement income.
• You don't need the current tax deduction and prefer simplicity in retirement withdrawals.
• You want to pass wealth to heirs — Roth accounts have no required minimum distributions (RMDs) during your lifetime.

The RMD Advantage of Roth

Traditional 401(k)s require you to take Required Minimum Distributions starting at age 73, whether you need the money or not. These RMDs are taxable and can push you into a higher bracket. Roth 401(k)s also had RMDs — until the SECURE 2.0 Act eliminated them starting in 2024. This makes Roth accounts significantly more flexible for estate planning.

Contribution Limits (2024)

The total contribution limit applies to both types combined: $23,000 per year (under 50), $30,500 per year (50 and older, with $7,500 catch-up). You can split contributions between traditional and Roth as long as you don't exceed the combined limit.

The Split Strategy

You don't have to choose one or the other. Many financial planners recommend contributing to both — traditional for the current tax break, Roth for future tax-free income. This tax diversification gives you flexibility to manage your tax bracket in retirement by drawing from whichever account is most tax-efficient each year.

Does Your Employer Match Apply to Both?

Yes — employer match applies regardless of which type you contribute to. However, employer match dollars always go into a traditional (pre-tax) account, even if you're contributing to a Roth. You'll pay taxes on those employer contributions when you withdraw them in retirement.