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A Roth IRA and a 401(k) are not competing choices — most people should use both. The question is the order, because when you can't fully fund both simultaneously, the sequence affects how much tax-free wealth you build over a working career. Get the order wrong and you may leave thousands in employer match on the table, or pay far more in retirement taxes than necessary. Get it right and the two accounts work together as a powerful, complementary system.
| Feature | 401(k) | Roth IRA |
|---|---|---|
| 2026 contribution limit | $23,500 ($31,000 if 50–59 or 64+; $34,750 if 60–63) | $7,000 ($8,000 if 50+) |
| Tax treatment | Pre-tax: reduces taxable income now; taxed on withdrawal | After-tax: no deduction now; tax-free withdrawal |
| Employer match | Yes — many employers match 3–6% of salary | No match available |
| Income limits to contribute | None | Phases out $150k–$165k single; $236k–$246k married (2026) |
| Investment options | Limited to employer's fund menu | Any broker, any fund, full flexibility |
| Required minimum distributions | Yes, starting at age 73 | None during your lifetime |
| Early access to contributions | 10% penalty + taxes before 59½ | Contributions (not earnings) accessible anytime penalty-free |
The sequence almost every fee-only financial planner recommends: first, contribute to your 401(k) up to the full employer match. This step is non-negotiable. An employer that matches 100% of your contributions up to 3% of salary is offering a 100% guaranteed return on those dollars before a single investment gain occurs. On a $70,000 salary with a 3% match, that's $2,100/year in free compensation that disappears forever if you don't contribute enough to capture it. Not getting the full match is the single most expensive retirement mistake most people make.
After the match is captured, max the Roth IRA — $7,000/year in 2026, or $583/month. You get tax-free growth, complete investment flexibility, no required minimum distributions, and the unique ability to access your contributions (not the earnings) at any age without penalty or taxes. Once the Roth IRA is maxed, return to the 401(k) and increase contributions toward the $23,500 annual limit. After all tax-advantaged space is used, a taxable brokerage account handles additional investing.
The one rule that overrides everything else: Never skip the 401(k) match to fund a Roth IRA instead. A 100% instant match beats any investment return. Get the match, then do the Roth. This sequence is almost always correct regardless of age, income, or tax situation.
The fundamental question with any retirement account is: when do you want to pay taxes? With a traditional 401(k), you pay taxes when you withdraw in retirement. With a Roth IRA, you pay taxes now on the contribution and nothing later. The mathematically superior choice depends on whether your tax rate is higher now or in retirement.
If you're in the 22% bracket today and expect to be in the 15% bracket in retirement (because your income will be lower), the traditional 401(k) wins — you avoided 22% tax now and will pay only 15% later. If you're in the 12% bracket today and expect to be in the 22% bracket in retirement (because Social Security, RMDs, and other income will push you up), the Roth wins — you paid 12% now and owe nothing later. Most young workers in the early career stages are in lower brackets and benefit from Roth contributions. Most high earners in peak earning years benefit more from the 401(k) deduction. If you're not sure where you'll be, contributing to both — which the standard priority order does — provides tax diversification that hedges the uncertainty.
The Roth IRA is especially valuable in these situations. If you're in the 12% or 22% tax bracket, locking in that rate now on $7,000/year of contributions — and getting decades of tax-free compounding on those dollars — is an excellent trade. A 26-year-old contributing $7,000/year to a Roth IRA at 7% growth for 39 years reaches $1.47 million at 65, completely tax-free. If your 401(k) plan offers only high-expense-ratio funds (look for expense ratios above 0.50%), the Roth's investment flexibility is worth prioritizing beyond the match. And if you value the option to access contributions before 59½ without penalty — which the Roth allows — that flexibility has real value for younger investors with unpredictable futures.
If you're in the 32%, 35%, or 37% marginal bracket, the pre-tax deduction from a 401(k) is extremely valuable. Deferring income taxed at 32% today, with the plan to withdraw it in retirement at a lower rate, is a clear win. High earners above the Roth IRA income limits ($165,000 for single filers in 2026) can't contribute to a Roth IRA directly anyway — though the backdoor Roth strategy remains available. If you're within 10–15 years of retirement and your anticipated retirement income will be modest, the current deduction is worth more than the future tax-free benefit of a Roth.
If your income exceeds the Roth IRA limits, you can still access Roth benefits through a two-step process called the backdoor Roth. First, make a non-deductible contribution to a traditional IRA (up to $7,000 in 2026 — there are no income limits on non-deductible contributions). Second, convert that traditional IRA balance to a Roth IRA. Because you already paid taxes on the non-deductible contribution, the conversion is tax-free on the contributed amount. There are complications if you have other traditional IRA balances (the pro-rata rule), so consult a tax professional before executing this strategy — but for high earners with no existing traditional IRA balances, it works cleanly.
At age 73, the IRS requires you to begin taking minimum distributions from traditional 401(k)s and IRAs — whether you need the money or not. On a $1.5 million traditional 401(k), the first-year RMD is approximately $55,000, which is added to any other income you have that year and taxed accordingly. Roth IRAs have no RMDs during your lifetime. If you have substantial retirement savings and don't want to be forced into taxable withdrawals at 73 — potentially pushing you into a higher bracket or increasing Medicare premiums — Roth contributions throughout your career significantly reduce the RMD burden.
$500/month invested at 7% from age 25 to 65 = approximately $1.3 million. The same $500/month starting at 35 = approximately $655,000. The same starting at 45 = approximately $305,000. Every decade of delay roughly halves the ending balance. The account type matters far less than starting early and contributing consistently. A mediocre fund choice in a Roth IRA started at 24 will almost certainly outperform an optimal fund choice in the same account started at 34.
Enter your contribution amount, current balance, and expected return to see your retirement balance at any age.
Use the Retirement Calculator →Use both accounts. Contribute to your 401(k) first until you've captured every dollar of employer match — that's free money that disappears if you don't take it. Then max the Roth IRA at $7,000/year for tax-free growth, investment flexibility, and no required minimum distributions. Then return to the 401(k). If you're in a high bracket or near retirement, weight more toward the 401(k). If you're young and in a lower bracket, weight toward the Roth. If you earn above the Roth income limit, use the backdoor Roth strategy. Start early, automate contributions, choose low-cost index funds, and let compounding handle the rest. The sequence and consistency matter far more than any single decision between the two accounts.
For informational and educational purposes only. Tax laws and income limits change annually. Consult a qualified financial advisor for personalized retirement planning guidance. Not financial advice.