If you’re trying to save for retirement, two accounts come up again and again: the 401(k) and the IRA. They sound like rival options you have to choose between — but they’re really teammates. Most people are best served by using both, in the right order. Here’s how they differ, and how to decide what to fund first.
The quick answer
A 401(k) is a retirement plan offered through your employer. An IRA (Individual Retirement Account) is one you open on your own at a brokerage or investing app. The 401(k) lets you contribute much more each year and may come with free employer matching; the IRA gives you a far wider menu of investments and more control. You can contribute to both in the same year.
What is a 401(k)?
A 401(k) is an employer-sponsored plan. You sign up through work, choose a percentage of each paycheck to contribute, and the money is invested before you ever see it. Its standout features:
- High contribution limits. A 401(k) lets you set aside far more per year than an IRA does. (The exact annual limit is set by the IRS and changes over time — check the current figure on the IRS 401(k) page.)
- The employer match. Many employers match part of what you contribute — for example, a percentage of your salary. That match is essentially free money and an immediate return on your contribution.
- A limited investment menu. Your plan offers a fixed set of funds chosen by the plan administrator — often target-date funds and a handful of index funds. Simple, but less choice.
- Automatic and out of sight. Contributions come straight out of your paycheck, which makes consistent investing painless.
What is an IRA?
An IRA is a retirement account you open yourself — no employer needed. You can set one up at most brokerages or beginner investing apps in a few minutes. Its strengths are almost the mirror image of a 401(k):
- Huge investment choice. Instead of a short fund menu, you can buy almost any stock, index fund, or ETF — making it easy to keep costs low.
- More control. You pick the provider (and its fees), the investments, and the type.
- Lower contribution limits. The trade-off: the IRS caps annual IRA contributions well below the 401(k) limit. (Again, verify the current number with the IRS.)
- No employer match. It’s funded entirely by you.
401(k) vs. IRA: the key differences
| 401(k) | IRA | |
|---|---|---|
| Who offers it | Your employer | You open it yourself |
| Contribution limit | Much higher | Lower |
| Employer match | Often yes (free money) | No |
| Investment choices | Limited plan menu | Nearly unlimited |
| Best at | High-volume, matched saving | Low-cost choice and control |
Both come in traditional (pre-tax now, taxed in retirement) and Roth (after-tax now, tax-free in retirement) flavors — more on that below.
Can you have both? Yes — and most people should
There’s no rule against funding a 401(k) and an IRA in the same year, and together they let you save more than either one alone. The main caveat is on the tax side: when you’re covered by a workplace plan, your income can affect whether a traditional IRA contribution is deductible, and your income can affect Roth IRA eligibility. Those thresholds change yearly, so confirm them on the IRS IRA page before you contribute.
Which should you prioritize?
When cash is limited, a widely used order of operations is:
- 401(k) up to the full employer match. If your employer matches, contribute at least enough to capture all of it. A 50% or 100% match is an instant return you won’t find anywhere else.
- Fund an IRA. Once the match is maxed, an IRA’s broader, often cheaper investment options are a great next home for your money. New to it? See How to Open a Roth IRA.
- Back to the 401(k). Still have money to invest? Keep adding to the 401(k) toward its higher limit.
This order isn’t a law — if your 401(k) has high fees or a weak fund menu, you might lean harder on the IRA after the match. Run the long-term picture through our Compound Interest Calculator to see how much consistent contributions can grow.
Traditional vs. Roth applies to both
Whichever account you use, you’ll usually choose between:
- Traditional — contribute pre-tax money now, lower this year’s taxable income, and pay tax when you withdraw in retirement.
- Roth — contribute after-tax money now and withdraw it (and its growth) tax-free in retirement.
The same logic you’d use to weigh a Roth vs. a Traditional IRA applies to a Roth vs. traditional 401(k). A common rule of thumb: Roth tends to favor people who expect to be in a higher tax bracket later, but your situation is what matters.
The bottom line
A 401(k) and an IRA aren’t an either/or. The 401(k) brings high limits and the unbeatable employer match; the IRA brings choice and control. Capture your full match first, add an IRA for low-cost flexibility, and you’ve got a powerful one-two punch for retirement. Investing always carries risk, including the possible loss of principal — this is educational information, not personalized financial advice. Browse more investing guides to keep building.
Frequently asked questions
Can I have a 401(k) and an IRA at the same time?
Which should I contribute to first, a 401(k) or an IRA?
What happens to my 401(k) when I leave my job?
Is a 401(k) or an IRA better?
Sources
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