401k vs Roth IRA

By WealthIQ Editorial  |  Last Updated: March 2026

The Core Difference: When You Pay Taxes

Both accounts are tax-advantaged retirement vehicles. The fundamental difference comes down to when you pay taxes:

• 401(k): Pre-tax contributions reduce your taxable income today. You invest, grow, and then pay ordinary income tax on every dollar you withdraw in retirement.
• Roth IRA: After-tax contributions — no tax break today. But your investments grow tax-free, and qualified withdrawals in retirement are completely tax-free.

The question isn’t “which is better?” — it’s “which will serve my specific situation better?” Tax rates, income, age, and expected retirement income all factor in.

The Golden Rule: Always Get the Employer Match

If your employer matches 401(k) contributions — say, 50% up to 6% of your salary — that is a 50% guaranteed return on your money before any market gains. There is no investment on earth that delivers risk-free 50% returns. Capturing the full match is rule number one, ahead of everything else.

Example: You earn $80,000. Your employer matches 50% up to 6% ($4,800). You contribute $4,800; employer adds $2,400. That’s $2,400 of free money. Don’t leave it on the table.

Contribution Limits in 2026

The IRS sets annual contribution limits that adjust periodically for inflation:

• 401(k): $23,500 in 2026 (employee contribution). If 50 or older, add $7,500 catch-up for a total of $31,000.
• Roth IRA: $7,000 in 2026. If 50 or older, add $1,000 catch-up for $8,000.

The 401(k) limit doesn’t include the employer match — the combined limit (employer + employee) is $70,000.

Income Limits: Roth IRA Has Them, 401(k) Doesn’t

Anyone with earned income can contribute to a 401(k), regardless of how much they earn. Roth IRA is income-restricted:

• Single filers: Phase-out begins at $150,000 MAGI; ineligible above $165,000
• Married filing jointly: Phase-out begins at $236,000; ineligible above $246,000

If your income exceeds these limits, you may qualify for the “Backdoor Roth IRA” strategy — contributing to a Traditional IRA (no income limit) and immediately converting to Roth. Consult a tax advisor for specifics.

401(k) vs Traditional IRA vs Roth IRA: Full Comparison

When 401(k) Wins

A 401(k) is the right priority when:

• Your employer offers a match. Always contribute enough to get the full match first.
• You’re in a high tax bracket now. If you’re in the 32% or 37% bracket, the pre-tax deduction provides immediate, substantial tax relief. Your future withdrawal rate in retirement may be lower.
• You expect lower income in retirement. If you’ll drop from a high to a moderate tax bracket, deferring taxes via 401(k) is advantageous.
• You want higher contribution capacity. The $23,500 401(k) limit allows you to shelter far more income than a Roth IRA’s $7,000.

When Roth IRA Wins

A Roth IRA is the right priority when:

• You’re early in your career. If you’re in the 12–22% bracket today and expect to be in a higher bracket later, paying taxes now at a low rate and locking in tax-free growth is a powerful strategy.
• You want tax diversification in retirement. Having both pre-tax (401k) and after-tax (Roth) buckets gives you flexibility to manage your tax rate in retirement.
• You want access to contributions before 59½. Roth IRA contributions (not earnings) can be withdrawn at any time without penalty — a flexibility 401(k) doesn’t offer.
• You want to avoid Required Minimum Distributions. RMDs force you to withdraw from pre-tax accounts at 73. Roth IRAs have no RMDs, allowing tax-free compounding to continue indefinitely.

The Both Strategy: Optimal for Most People

Financial planners broadly recommend a sequenced approach:

1. Contribute to 401(k) up to the employer match. Free money first, always.
2. Max your Roth IRA ($7,000). Lock in tax-free growth at lower contribution amounts.
3. Return to your 401(k). If you have more to invest, continue contributing up to the $23,500 limit.
4. If still more: Consider taxable brokerage accounts, HSA, or other vehicles.

This order optimizes both the free money (employer match) and the tax-free growth opportunity (Roth), while maintaining flexibility through the combined accounts.

The Bottom Line

Neither account is universally superior. The right answer depends on your current tax bracket, expected retirement bracket, employer match availability, and income. For most workers in the 22% bracket or below, a combination of both — 401(k) to the match, then Roth IRA — is the optimal starting point. As your income grows, revisit the allocation with a tax advisor.

Start simple: open a Roth IRA with Fidelity or Betterment, contribute the max, and ensure you’re capturing every dollar of your employer’s 401(k) match. Future you will thank you.