401(k) vs IRA: Retirement Basics for Beginners

Why retirement accounts deserve early attention

Retirement can feel far away when rent, groceries and debt payments are due this month. But retirement accounts offer something ordinary savings accounts do not: tax advantages that let more of your money stay invested for decades. Time is the most powerful ingredient, which is why starting small and early usually beats starting large and late.

Consider a simple hypothetical. Investing $300 per month with an average annual return of 6% would grow to roughly $597,000 over 40 years. Starting the same $300 per month 10 years later, with 30 years to go, produces about $301,000. The later saver contributed only 25% less money but ended with about half as much. Real returns vary and are never guaranteed, but the pattern shows why the first years matter.

The two most common U.S. retirement accounts are the 401(k) and the IRA. They are not investments themselves. They are containers that hold investments, such as index funds or ETFs, and each container follows its own rules.

What a 401(k) is

A 401(k) is a retirement plan offered through an employer. You choose a percentage of each paycheck to contribute, and the money is deducted automatically through payroll. Similar plans exist for other employers: 403(b) plans for many nonprofits and schools, 457(b) plans for some government workers and the Thrift Savings Plan for federal employees.

The standout feature is the employer match. Many employers add money when you contribute, for example matching 100% of your contributions up to 4% of salary. On a $70,000 salary, contributing 4%, or $2,800 a year, would bring an additional $2,800 from the employer. That is an immediate 100% return on those dollars before any investment growth.

For 2026, the IRS limit on employee contributions to a 401(k) is $24,500, with an additional $8,000 catch-up contribution for people age 50 and older and a higher catch-up amount for people ages 60 through 63. Employer contributions do not count against your employee limit. These limits usually change each year, so confirm the current numbers on IRS.gov.

Vesting

Your own contributions are always yours. Employer contributions may follow a vesting schedule, meaning you earn full ownership over time, such as 20% per year over five years. If you leave before being fully vested, you may forfeit part of the match. Check your plan's summary plan description for the exact schedule.

What an IRA is

An individual retirement arrangement, or IRA, is an account you open yourself at a brokerage, bank or robo-advisor. It does not depend on an employer, so it stays the same when you change jobs. You generally need earned income, such as wages or self-employment income, to contribute, although a working spouse's income can support a contribution for a non-working spouse.

For 2026, the total you can contribute across all of your IRAs is $7,500, plus a $1,100 catch-up contribution if you are 50 or older. You can make contributions for a given tax year up to the tax filing deadline in April of the following year.

IRAs usually offer much broader investment choices than a 401(k), which may have a menu of only 15 to 30 funds. That flexibility is useful if your workplace plan has high-cost options.

401(k) vs IRA at a glance

You do not have to choose one or the other. Many people use both, and the combination is often stronger than either alone.

Traditional vs Roth: pay taxes now or later

Both 401(k) plans and IRAs usually come in two tax versions.

• Traditional: contributions are generally made before tax or are tax-deductible, which lowers your taxable income today. Withdrawals in retirement are taxed as ordinary income.
• Roth: contributions are made with money that has already been taxed. Qualified withdrawals in retirement, including the growth, are tax-free.

Here is the tradeoff in numbers. If you are in the 22% federal tax bracket, a $1,000 traditional contribution can lower this year's federal tax bill by about $220. A $1,000 Roth contribution gives no deduction now, but decades of growth on that money can later be withdrawn tax-free if the rules are met.

A common rule of thumb is that Roth accounts tend to favor people who expect to be in a higher tax bracket later, such as early-career workers, while traditional accounts tend to favor people in their peak earning years who expect a lower bracket in retirement. Since nobody knows future tax rates, many people split contributions between both types for flexibility.

A simple order of priorities

If you are not sure where your next retirement dollar should go, this sequence is a widely used starting framework. It is not personal advice, and your situation may justify a different order.

1. Contribute enough to your 401(k) to get the full employer match. Leaving a match unclaimed is leaving part of your compensation behind.
2. Build a starter emergency fund and pay down high-interest debt. Credit card interest above 20% is hard for any investment to outrun reliably.
3. Contribute to an IRA, often a Roth IRA if you are eligible, for broader and potentially lower-cost investment choices.
4. Return to the 401(k) and raise contributions toward the annual limit as your budget allows.
5. Invest in a taxable brokerage account for additional goals once tax-advantaged options are used.

A practical habit is to raise your 401(k) contribution by one percentage point each time you get a raise. The increase comes out of new money, so your take-home pay does not shrink.

Withdrawal rules to understand before you start

Retirement accounts are designed for retirement, and the rules discourage early access. In general, withdrawals from traditional accounts before age 59½ are subject to ordinary income tax plus a 10% additional tax, although the IRS lists exceptions for certain situations.

Roth IRAs are more flexible in one important way: the amount you contributed, not the earnings, can generally be withdrawn at any time without tax or penalty. Earnings follow stricter rules. Some 401(k) plans also allow loans, but a loan pauses the growth of that money and can create problems if you leave your job before repaying it.

Because of these rules, your emergency fund should live outside retirement accounts, in an insured savings account you can reach quickly.

What to invest in inside the account

Opening an account is only half the job. Money that sits in cash inside an IRA does not grow much. Many beginners choose a target-date fund, which holds a diversified mix of stocks and bonds and gradually becomes more conservative as the target retirement year approaches. Others use broad, low-cost index funds or ETFs. Compare expense ratios, since a difference of even half a percentage point per year compounds over decades. For background, see stocks vs. ETFs.

What happens when you change jobs

When you leave an employer, your vested 401(k) balance goes with you. You can usually leave it in the old plan, roll it into your new employer's plan or roll it into an IRA. A direct rollover, where the money moves straight from one account to the other, avoids mandatory tax withholding. Cashing out is generally the most expensive option, because it can trigger income tax, the 10% additional tax and the loss of future growth.

Frequently asked questions

Can I contribute to both a 401(k) and an IRA in the same year?

Yes. The limits are separate, so you can contribute to both. If you or your spouse are covered by a workplace plan, your ability to deduct traditional IRA contributions may be reduced at higher incomes, but you can still contribute.

What if my employer does not offer a 401(k)?

You can open an IRA on your own at a brokerage or robo-advisor. Self-employed people and freelancers may also be able to use a SEP IRA or a solo 401(k), which allow higher contributions based on business income.

Can I contribute to a Roth IRA if my income is too high?

Roth IRA eligibility phases out above certain income levels that the IRS updates each year. Some higher earners use a strategy called a backdoor Roth, which involves a nondeductible traditional IRA contribution followed by a conversion. It has tax details worth reviewing with a tax professional first.

What does it mean when an employer match is vested?

Vesting is the schedule by which you earn full ownership of employer contributions. Once a match is fully vested, it is yours even if you leave the job. Your own contributions are always 100% vested.

Is it ever too late to start saving for retirement?

No. Starting later means each dollar has less time to grow, but contributions still benefit from tax advantages, and catch-up contributions let people 50 and older save more each year. The best time to start is as soon as your emergency fund and high-interest debt are under control.