By the RetireGauge Editorial Team · Updated June 2026 · Researched from authoritative sources. General information, not professional advice.
For most working Americans, the two main tax-advantaged places to save for retirement are an employer-sponsored 401(k) and an Individual Retirement Account, or IRA. They are not an either-or choice. In fact, the standard advice from financial planners is to use both, in a specific order, to capture free money first and the lowest costs second. This guide explains how each account works, how they compare side by side, and the priority order that gets the most out of every dollar you save.
A 401(k) is a retirement plan offered through your employer. You elect a percentage of your paycheck to contribute, and the money is deducted automatically before you ever see it. The defining advantages of a 401(k) are scale and, often, free money:
The trade-offs are a limited investment menu (you can only choose from the funds your plan offers) and potentially higher fees, since some plans bundle administrative costs and pricier funds. By law, plan administrators must give you fee disclosures, a requirement enforced by the U.S. Department of Labor under the Employee Retirement Income Security Act (ERISA).
An IRA is an account you open yourself at a brokerage, bank, or robo-advisor. No employer is involved, which means anyone with earned income can have one. Its strengths are essentially the mirror image of the 401(k):
The main drawback is a much lower annual contribution limit, and there is no employer match because there is no employer. There are also income limits that can restrict or eliminate certain IRA tax benefits, covered below.
| Feature | 401(k) | IRA |
|---|---|---|
| Contribution limit | Much higher (verify current year with the IRS) | Much lower (verify current year with the IRS) |
| Employer match | Often yes — free money | No |
| Investment choices | Limited to the plan's fund menu | Wide — nearly any stock, fund, or ETF |
| Fees | Can be higher; DOL-required disclosures apply | Often lower; you control them |
| Required minimum distributions (RMDs) | Yes for traditional; Roth 401(k) RMDs eliminated under recent law | Traditional: yes; Roth IRA: none during your lifetime |
| Early access before 59½ | Loans sometimes allowed; withdrawals usually face a 10% penalty | No loans; withdrawals usually face a 10% penalty |
| Income limits | None to contribute | Limits apply to Roth contributions and deductible traditional contributions |
| How you open it | Through your employer | You open it yourself |
Limits and thresholds are intentionally not listed as dollar figures here because the IRS adjusts most of them annually for inflation. Check the current-year numbers on IRS.gov before you contribute.
Because the two accounts have complementary strengths, the conventional sequence is designed to grab the highest-value benefit at each step:
This order is a general framework, not a rule for everyone. A 401(k) with unusually low-cost institutional funds might be worth prioritizing over an IRA, for instance.
Both 401(k)s and IRAs come in two flavors. A traditional account gives you a tax deduction now and taxes withdrawals later; a Roth account is funded with after-tax money and grows tax-free, with qualified withdrawals tax-free in retirement. The choice hinges largely on whether you expect to be in a higher or lower tax bracket later. We cover the full decision in our companion guide on Roth vs traditional accounts.
IRAs carry income restrictions that 401(k)s do not. Per the IRS, your ability to deduct traditional IRA contributions can be reduced or eliminated if you (or a spouse) are covered by a workplace plan and your income is above certain thresholds. Separately, the ability to contribute directly to a Roth IRA phases out above income limits that the IRS updates each year.
Higher earners who are phased out of direct Roth contributions sometimes use a backdoor Roth: contributing to a non-deductible traditional IRA and then converting it to a Roth IRA. This is a legal strategy, but the tax math can get complicated when you hold other pre-tax IRA balances (the IRS pro-rata rule), so it is worth professional guidance.
Your own 401(k) contributions are always 100% yours. Employer matching contributions, however, may be subject to a vesting schedule — you earn full ownership of the match only after a set number of years of service. Some plans vest immediately; others use graded or cliff vesting over several years. If you leave before you are fully vested, you can forfeit the unvested portion of the match, so it is worth knowing your plan's schedule before changing jobs.
When you leave a job, you generally have a few options for an old 401(k): leave it where it is, roll it into your new employer's plan, or roll it into an IRA. A rollover IRA is popular because it consolidates accounts and unlocks the wider, lower-cost investment menu of an IRA.
Two cautions from the IRS rollover rules matter most. First, do a direct (trustee-to-trustee) rollover so the money moves between custodians without passing through your hands; an indirect rollover can trigger mandatory withholding and a 60-day deadline. Second, do not cash out a 401(k) when leaving a job. A cash-out is taxed as income and, if you are under age 59½, generally hit with an additional 10% early-withdrawal penalty — a costly mistake that also wipes out years of future compounding.
If you work for yourself, you are not limited to a personal IRA. Two common vehicles let the self-employed save far more:
The IRS sets the specific limits for both, so confirm the current-year figures before contributing.
Fees quietly erode returns over decades, so they deserve attention. In a 401(k), federal law requires your plan to provide fee disclosures; the Department of Labor explains what these statements must show and publishes guidance to help workers understand them. Look for the fund expense ratios and any plan administrative fees. In an IRA, compare the expense ratios of the funds you choose and any account maintenance fees the provider charges. Favoring low-cost index funds is one of the most reliable ways to keep more of your money working for you.
Yes. The accounts have separate contribution limits, so you can fund both in the same year. The only catch is that income limits may affect whether your IRA contribution is tax-deductible or Roth-eligible. Verify the current thresholds with the IRS.
You can usually leave it, roll it into your new plan, or roll it into an IRA. A direct rollover to an IRA often gives more choice and lower fees. Avoid cashing it out, which triggers taxes and, before age 59½, a 10% penalty.
Effectively, yes. A dollar-for-dollar match is an instant 100% return on the matched amount, which no investment reliably beats. That is why planners recommend capturing the full match before doing anything else, subject to your plan's vesting schedule.
Traditional 401(k)s and traditional IRAs require minimum distributions starting at the age set by the IRS. Roth IRAs have no RMDs during the owner's lifetime, and recent law eliminated lifetime RMDs for Roth 401(k)s. Check IRS.gov for the current RMD age.
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