What is the difference between a 401(k) and an IRA?
Who sponsors it, how much you can put in, and who might match; the practical difference between the two big tax-advantaged retirement accounts.
By Priya Raman Investing and Savings Writer· Updated Sep 6, 2026· Last reviewed Sep 6, 20262 min read1 views
- 401(k): employer-sponsored, high limits, often a match you must not skip.
- IRA: your own account, lower limits, full control over the provider.
- Order: max the match first, then decide between more 401(k), an IRA, or a Roth version of either.
A 401(k) is your employer's retirement account; an IRA is the one you own yourself. Both run on the same tax-advantage engine; the differences are sponsorship, contribution limits, and who matches you.
People overcomplicate this because the tax words (traditional and Roth) repeat on both sides. Strip it to the frame: 401(k) means payroll deduction, bigger annual room, usually a match. IRA means your own pick of brokerage, lower room, no match. Then it's just a ladder.
Side-by-side
| 401(k) | IRA | |
|---|---|---|
| Opened by | Your employer (you can add extra) | You, at any brokerage |
| Contribution source | Payroll deduction, automatic | Transfers from your bank |
| Employer match | Common; check your plan | None |
| Investment choice | The plan's menu | Whatever your broker offers |
| Traditional / Roth | Both exist | Both exist, slightly different Roth rules |
The order that's correct 9 times out of 10
- Contribute up to the 401(k) employer match; a guaranteed 50-100% day-one return.
- Open an IRA (or Roth IRA if you qualify) for the next dollars; full control, low fees.
- Return to the 401(k) beyond the IRA cap; the bigger rooms live there.
- Revisit yearly: limits change, employers change, and Roth conversions deserve a glance when income dips.
The 'left on the table' check
- Skipping the match is salary psychology at its worst; it's compensation, not a favor.
- Watch plan and fund fees in the 401(k); the IRA's advantage is often simply cheaper funds.
- Roth puts post-tax money in now; you're betting your future tax rate is higher, which for most young earners is the fair bet.
Roth IRA contributions can usually be withdrawn anytime without penalty (contributions, not gains). That flexibility is why a Roth IRA doubles as a last-ditch emergency layer for some savers.
Related reading: how much to invest monthly, and what compounding does once the autopilot is on.
The best retirement account is the one that gets money in before the month spends it.
FAQ
Frequently asked questions
Can I have both a 401(k) and an IRA?
Yes, and many people do: capture the 401(k) match, fund an IRA for control and choice, then return to the 401(k) for its higher limits. The contribution caps are separate for each.
Which should I contribute to first?
The employer match outranks everything. After that, the Roth IRA usually wins for control if you qualify or expect higher taxes later; otherwise the 401(k)'s automatic payroll deductions and bigger limits edge it. The wrong choice is skipping the match to chase marginal tax differences.
Is a Roth 401(k) or Roth IRA better?
Both are after-tax now and tax-free later. The Roth IRA beats the Roth 401(k) on control; any provider, and you can withdraw contributions without penalty. The Roth 401(k) wins on higher limits plus the match. Match first, control second.
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