401(k) vs IRA: Which Retirement Account Should You Prioritize?

401(k) Basics: The Workplace Powerhouse

A 401(k) is an employer-sponsored retirement savings plan that lets you contribute a portion of each paycheck before taxes hit your bank account. The money grows tax-deferred, meaning you pay no income taxes on investment gains until you withdraw funds in retirement. At that point, withdrawals are taxed as ordinary income.

The 2026 contribution limit for a 401(k) is $23,500. Workers aged 50 and older can add a catch-up contribution of $7,500, bringing their maximum to $31,000. These limits are set by the IRS and typically increase slightly each year to account for inflation.

Traditional 401(k) vs Roth 401(k)

Many employers now offer both Traditional and Roth options within their 401(k) plans. The difference is when you get taxed. With a Traditional 401(k), contributions are made with pre-tax dollars, reducing your taxable income today. You pay taxes when you withdraw in retirement. With a Roth 401(k), contributions are made with after-tax dollars — no upfront tax break — but qualified withdrawals in retirement are completely tax-free, including all the investment growth.

The Roth 401(k) is especially valuable for younger workers or anyone who expects to be in a higher tax bracket in retirement. Unlike a Roth IRA, the Roth 401(k) has no income limits — anyone can contribute regardless of how much they earn.

The Employer Match: Never Leave Free Money Behind

The single most important feature of a 401(k) is the employer match. Many employers match 50 percent or 100 percent of your contributions up to a certain percentage of your salary. A common structure is a 100 percent match on contributions up to 3 percent of salary. If you earn $60,000 and contribute 3 percent ($1,800), your employer adds another $1,800 — an instant 100 percent return on those dollars before any investment gains.

Not contributing at least enough to capture the full match is one of the most expensive financial mistakes you can make. If your employer matches up to 4 percent of salary and you only contribute 2 percent, you are leaving half the match on the table — effectively turning down part of your compensation.

IRA Basics: Flexibility and Control

An Individual Retirement Account (IRA) is a retirement savings account you open and manage yourself, independent of any employer. Because you choose the brokerage, you typically have access to a far wider range of investment options than most 401(k) plans offer. The 2026 IRA contribution limit is $7,000, or $8,000 if you are 50 or older.

Traditional IRA

With a Traditional IRA, contributions may be tax-deductible depending on your income and whether you or your spouse have access to a workplace retirement plan. If deductible, your contribution reduces your taxable income for the year, just like a 401(k). The money grows tax-deferred, and you pay income taxes on withdrawals in retirement. Required Minimum Distributions (RMDs) must begin at age 73.

If you are covered by a workplace retirement plan, the deductibility of Traditional IRA contributions begins to phase out at $79,000 of modified adjusted gross income (MAGI) for single filers and $126,000 for married couples filing jointly in 2026. Above the phase-out range, contributions are non-deductible but can still be made — a strategy relevant to the backdoor Roth, discussed below.

Roth IRA: Tax-Free Growth with Income Limits

The Roth IRA is the most beloved retirement account among personal finance enthusiasts, and for good reason. You contribute after-tax dollars, your money grows completely tax-free, and qualified withdrawals in retirement — including all earnings — are never taxed. There are also no Required Minimum Distributions, making a Roth IRA an excellent wealth-transfer vehicle.

The catch is income limits. In 2026, the ability to contribute to a Roth IRA directly begins to phase out at $150,000 MAGI for single filers and $236,000 for married couples filing jointly. Above those limits, you cannot contribute directly to a Roth IRA — though you may be able to use the backdoor Roth strategy.

401(k) vs IRA: Side-by-Side Comparison

The Optimal Funding Order

Given the different strengths of each account, financial planners generally recommend the following priority order for retirement contributions:

Step 1: 401(k) up to the employer match. Always start here. Contributing enough to get every dollar of employer match is the highest-return financial move available to most workers. There is no investment that reliably beats a 50 percent or 100 percent instant match.

Step 2: Max out an HSA (if eligible). If you have a high-deductible health plan, a Health Savings Account offers triple tax advantages: pre-tax contributions, tax-free growth, and tax-free withdrawals for medical expenses. After age 65, you can withdraw for any purpose and pay only ordinary income tax — just like a Traditional IRA. This makes the HSA arguably the best retirement account available.

Step 3: Max out your IRA. After capturing the full 401(k) match, focus on maxing your IRA before returning to your 401(k). Why? Because IRAs typically offer better investment options and lower expense ratios than most employer 401(k) plans. The $7,000 annual limit is modest enough that maxing it should be achievable before filling the 401(k).

Step 4: Return to the 401(k) and max it out. Once the IRA is maxed, increase your 401(k) contributions toward the $23,500 annual limit. At this point you have maximized all major tax-advantaged space available to you.

Use our retirement savings calculator to project how different contribution levels will grow over time, and our compound interest calculator to see the power of starting early.

When to Prioritize the IRA Over the 401(k)

The standard funding order assumes your 401(k) is reasonably good. But some employer plans are genuinely poor — high-fee funds, limited investment options, or administrative costs that drag on returns. If your 401(k) only offers actively managed funds with expense ratios above 1 percent, you may be better off skipping the 401(k) entirely (after the match) and maxing your IRA instead.

Signs that your IRA should come before additional 401(k) contributions: expense ratios above 0.5 percent on available index funds; no index fund options at all; high plan administrative fees; or a plan that has not updated its investment menu in years. Check your 401(k)'s Summary Plan Description or ask your HR department for the plan's expense ratio information.

The Mega Backdoor Roth

High earners who want to shelter more money from taxes can explore the mega backdoor Roth strategy, which can allow contributions of up to $70,000 total to a 401(k) in 2026 (the combined employee + employer limit). Here is how it works: the IRS allows total contributions to a 401(k) — including employer match, profit sharing, and after-tax employee contributions — up to $70,000 per year. If your 401(k) plan allows after-tax contributions and in-service withdrawals or in-plan Roth conversions, you can make large after-tax contributions and then convert them to Roth, potentially adding tens of thousands of dollars in Roth space per year.

Not all 401(k) plans support this strategy. Check your plan documents or ask your plan administrator whether after-tax contributions and in-service Roth conversions are permitted.

The Backdoor Roth IRA for High Earners

If your income exceeds the Roth IRA limits, you can still access Roth benefits through the backdoor Roth IRA strategy. The process: make a non-deductible Traditional IRA contribution (which has no income limit), then convert that Traditional IRA to a Roth IRA. Since you already paid tax on the contribution, only any earnings between contribution and conversion are taxable — typically a small amount if you convert quickly.

The strategy is legal and widely used, but it requires attention to the "pro-rata rule" if you have other pre-tax IRA funds. If you have a large Traditional IRA from previous years, a partial conversion will be partly taxable based on the ratio of after-tax to total IRA funds. Many high earners roll pre-tax IRA money into their 401(k) to avoid this complication.

Choosing Between Traditional and Roth

Whether to use the Traditional (pre-tax) or Roth (after-tax) version of either account comes down to one question: will your tax rate be higher now or in retirement? If you expect to be in a lower tax bracket in retirement, the Traditional approach wins — you defer taxes from your high-rate working years to your lower-rate retirement years. If you expect to be in the same or higher bracket in retirement, Roth is better — you pay taxes now at a known rate and never pay taxes on growth again.

For most people in their 20s and early 30s, who are likely in their lowest lifetime tax brackets, Roth contributions are hard to beat. For high earners in peak earning years (ages 45 to 60), Traditional contributions often make more sense. Tax diversification — having money in both Traditional and Roth accounts — gives you flexibility to manage your tax situation in retirement. Use our tax calculator to estimate your current effective tax rate.

Frequently Asked Questions