Retirement Accounts Explained: 401(k)s, IRAs, Roth vs Traditional, and How to Choose
Direct Answer
Retirement accounts are special tax-advantaged accounts designed for saving toward retirement. The two main families are workplace plans like the 401(k) and personal accounts like the IRA, each available in traditional (tax break now) or Roth (tax-free withdrawals later) versions. For 2026, you can contribute up to $24,500 to a 401(k) and $7,500 to an IRA, with higher catch-up limits if you are 50 or older.
Key Takeaways
- Retirement accounts grow without yearly tax on dividends and gains — you are taxed once, at contribution (Roth) or at withdrawal (traditional), not every year.
- A 401(k) comes through your employer and may include a matching contribution; an IRA is one you open yourself and usually offers more investment choice.
- Traditional accounts give you a tax break now; Roth accounts give you tax-free withdrawals in retirement.
- Always capture the full employer match first — it is the highest guaranteed return available in most retirement accounts.
- You can contribute to both a 401(k) and an IRA in the same year, because their limits are separate.
- Traditional 401(k)s and IRAs require minimum withdrawals (RMDs) starting at age 73 (born 1951–1959) or 75 (born 1960 or later); Roth IRAs have no lifetime RMDs.
What Are Retirement Accounts?
Retirement accounts are accounts the tax system treats specially to reward long-term saving. In an ordinary investment account, dividends are taxed in the year you receive them and gains are taxed when you sell. Over decades, that yearly trimming adds up. Inside retirement accounts, your money grows without being taxed year by year.
The trade-off is that the money is meant to stay put until retirement. Withdrawing early usually triggers income tax and, in most cases before age 59½, an additional 10% penalty. That lock-in is the price of the tax break — and the reason these accounts work best when you start early and leave the money alone.
It helps to contrast retirement accounts with everyday savings. A savings account pays interest — our guide to annual percentage yield explains how that interest compounds — but it is taxed yearly and built for money you may need soon. Retirement accounts are built for money you will not touch for decades, invested for growth rather than parked for access.
Retirement Accounts Compared: 401(k) vs IRA
The two main types of retirement accounts differ mainly in who offers them and how much you can put in.
| Feature | 401(k) | IRA |
|---|---|---|
| Who offers it | Your employer, through a workplace plan | You, opened yourself at a bank or brokerage |
| How you contribute | A percentage of each paycheck, deducted automatically | Direct contributions whenever you choose |
| 2026 contribution limit | $24,500 ($32,500 at age 50+, $35,750 at ages 60–63) | $7,500 ($8,600 at age 50+) |
| Employer match | Often available — free money on top of your contribution | Not available |
| Investment choice | A limited menu of funds chosen by your employer | A wide range, including low-cost index funds |
| Deadline to contribute | Your final paycheck of the year (December 31) | Tax filing day, typically April 15 of the following year |
What is a 401(k)?
A 401(k) is an employer-sponsored retirement account. You choose a percentage of each paycheck to contribute, and it is invested automatically before you ever see it, which makes saving almost effortless. Contributions to a traditional 401(k) come out pre-tax, lowering your taxable income today. The 401(k) has a relatively high annual contribution limit, and the whole thing runs on autopilot once you set it up.
What is an IRA?
An IRA (Individual Retirement Account) is a personal retirement account you open independently, not through an employer. Anyone with earned income can use one. The contribution limit is lower than a 401(k)’s, but you get something valuable in return: full control over where the money is invested. An IRA is ideal if you do not have a workplace plan, or to invest in addition to your 401(k).
Can I contribute to both a 401(k) and an IRA?
Yes. The limits are separate: you can contribute the maximum to a 401(k) and the maximum to an IRA in the same year, provided you meet the income requirements for IRA contributions. Many people do exactly that — the 401(k) for the match and the higher limit, the IRA for wider investment choice.
Roth vs Traditional: Pay Tax Now or Later?
Both 401(k)s and IRAs come in two versions, and the difference is simply when you pay tax.
| Traditional | Roth | |
|---|---|---|
| Tax break | Now — contributions reduce today’s taxable income | Later — withdrawals in retirement are tax-free |
| Taxed when | You withdraw in retirement | You contribute (contributions are after-tax) |
| Best when | You expect a lower tax rate in retirement | You expect a higher (or similar) tax rate later |
| Required withdrawals | Yes, RMDs from age 73/75 | Roth IRA: none during your lifetime; Roth 401(k): none since 2024 |
Roth vs traditional: which is better?
It depends on one comparison: your tax rate today versus your tax rate when you withdraw. If you are early in your career and your income (and tax rate) is likely to rise, the Roth version is often attractive because you lock in today’s lower rate and enjoy tax-free growth. If you are in your peak earning years and want the deduction now, traditional may make more sense. Unsure? Some of each is a reasonable hedge — you are not forced to pick one version for every account.
Two Roth rules are worth knowing. First, qualified Roth withdrawals are tax-free only after age 59½ and once the account has met the 5-year rule. Second, contributions to a Roth IRA (not the growth, just what you put in) can generally be withdrawn at any time tax- and penalty-free, which makes a Roth IRA unusually flexible among retirement accounts.
How Much Can I Contribute in 2026?
The IRS adjusts retirement account limits each year for inflation. For 2026, under IRS Notice 2025-67, the headline limits are:
| Limit (2026) | Amount |
|---|---|
| 401(k) employee deferral, under 50 | $24,500 |
| 401(k) catch-up, age 50+ | Extra $8,000 (total $32,500) |
| 401(k) catch-up, ages 60–63 | Extra $11,250 (total $35,750) |
| IRA (traditional and Roth combined), under 50 | $7,500 |
| IRA catch-up, age 50+ | Extra $1,100 (total $8,600) |
| Total annual additions to a 401(k), employee plus employer | $72,000 |
A few details matter. The IRA limit is one limit shared across all your traditional and Roth IRAs combined — you cannot put $7,500 in each. Your employer’s matching contribution does not count toward your $24,500 employee deferral limit, which is why the total-additions limit is much higher. And limits change every year: always check the current IRS figures before planning a year’s contributions, since last year’s numbers will be out of date. Source: IRS COLA limits page.
The Employer Match: Free Money First
Many employers match part of your 401(k) contribution — for example, 50% of the first 6% of pay you contribute. That match is extra money on top of your own saving, and turning it down is like refusing part of your pay. If your employer offers a match, contributing at least enough to get the full match is the first move in almost every retirement plan.
One caution: some matches vest over time, meaning you only fully own the employer’s contributions after staying a set number of years. If you leave early, you may forfeit part of the match. Your plan’s vesting schedule is worth checking before you change jobs.
What Order Should I Fund Retirement Accounts In?
A widely used sequence for funding retirement accounts is:
- Contribute to your 401(k) up to the full employer match. Capture every dollar of free money first.
- Fund an IRA (Roth or traditional) for its wider investment choice and, with a Roth IRA, its flexible contribution withdrawals.
- Go back and raise your 401(k) toward its higher limit once the IRA is funded.
- Only then consider a taxable account for extra long-term investing.
This order is a starting point, not a personal prescription. Someone with a very low-cost 401(k) might reasonably skip step 2, and someone without a workplace plan starts at step 2 by default. For a fuller comparison of the two account families, see the Fidelity IRA vs 401(k) guide.
What If You Don’t Have a Workplace Plan?
If your employer offers no 401(k), an IRA is your main retirement account — open one yourself and contribute regularly. If you are self-employed or run a small business, two more types of retirement accounts exist: the SEP IRA and the SIMPLE IRA, which let you contribute more than a regular IRA and are designed for business owners and their employees. A good first step is comparing their limits and rules on the IRS site before choosing, since the right one depends on how your business is set up.
Changing Jobs? What Happens to Your 401(k)
When you leave a job, your 401(k) does not disappear. You generally have four options:
- Leave it in your former employer’s plan, if the plan allows it.
- Roll it into your new employer’s plan, keeping everything in one workplace account.
- Roll it into an IRA, which usually gives you wider investment choice.
- Cash it out — the costly option: you owe income tax on the withdrawal, plus a 10% penalty if you are under 59½, and the money stops growing for retirement.
A direct rollover — moving the money straight from one account to another without it passing through your hands — avoids tax withholding problems. If a cheque is made out to you instead, 20% is typically withheld for taxes, and you must replace it from other funds within 60 days to avoid the withdrawal being treated as taxable.
Can I Retire at 60?
Yes, retiring at 60 is possible — but it needs a bridge plan. At 60 you are past the 59½ early-withdrawal penalty age, so retirement account withdrawals no longer carry the 10% penalty. Two gaps remain: Social Security cannot start until 62 at the earliest (at a reduced amount), and Medicare does not begin until 65, so health cover for ages 60–65 must come from elsewhere. The practical question is not whether your accounts allow retiring at 60, but whether your savings cover five years of spending before those benefits begin — which is exactly what a withdrawal plan should test before you hand in your notice.
How Long Will My 401(k) Last?
How long a 401(k) lasts depends on four things: how much is in it, how much you withdraw each year, how investments perform, and how long you live. A common planning starting point is the 4% rule — withdrawing around 4% of the balance in the first year of retirement and adjusting for inflation after — but it is a rule of thumb, not a guarantee, and it bends with market returns and lifespan. Our guide to how long your money will last walks through the withdrawal maths, Social Security timing, and the levers that stretch savings further.
A retirement withdrawal calculator can give you a personalised estimate by modelling your balance, contributions, and retirement age — use one as a planning aid, not a promise, since no calculator knows future returns.
Required Minimum Distributions (RMDs): When You Must Start Withdrawing
Traditional retirement accounts cannot stay untouched forever. The government requires minimum withdrawals — required minimum distributions, or RMDs — so the tax deferred for decades eventually gets paid.
| Born | RMDs start at age |
|---|---|
| 1951–1959 | 73 |
| 1960 or later | 75 (from 2033) |
The amount is calculated by dividing your prior December 31 balance by an IRS life-expectancy factor. Your first RMD can be delayed until April 1 of the year after you reach your RMD age, but every later RMD must be completed by December 31 — and delaying the first one means taking two distributions in one tax year, which can push you into a higher bracket.
Roth IRAs have no lifetime RMDs, and since 2024 Roth 401(k) accounts no longer require them either. Missing an RMD is expensive: the penalty is 25% of the amount not withdrawn, reduced to 10% if you correct the error within two years.
Early Withdrawals: The 10% Penalty and Exceptions
Withdrawing from retirement accounts before age 59½ usually means income tax plus a 10% penalty on the amount withdrawn. Exceptions exist — for example, disability, certain medical expenses, and a first-home purchase of up to $10,000 from an IRA — but they are narrow, and the rules differ between 401(k)s and IRAs. The practical message is simple: treat retirement accounts as locked until retirement, and keep a separate emergency fund so a crisis never forces an early withdrawal.
Common Mistakes to Avoid
- Missing the match. Contributing less than the full-match threshold leaves free money unclaimed.
- Cashing out at a job change. Tax plus penalty can take a large share, and the lost decades of growth cost far more.
- Forgetting old accounts. Track down every old 401(k) when you move jobs; forgotten accounts still charge fees and still need beneficiaries.
- Never updating beneficiaries. Retirement accounts pass to the named beneficiary regardless of what a will says — review them after marriage, divorce, or children.
- Ignoring what the money is invested in. A retirement account is a container; the investments inside it decide the growth. Leaving everything in a default fund without ever checking it is a choice, not a plan.
Frequently Asked Questions
Can I have more than one retirement account?
Yes — you can hold a 401(k) and an IRA at the same time, and even multiple IRAs. The limits apply per account type, not per account, so two IRAs still share one $7,500 limit.
What is a 403(b)?
A 403(b) is the close cousin of the 401(k) for employees of public schools, charities, and some nonprofits. It works much the same way — paycheck contributions, an employer match in some plans, and the same 2026 deferral limit.
Is a pension a retirement account?
A pension is retirement income, but it works differently: your employer funds and manages it and pays you a set amount in retirement, whereas 401(k)s and IRAs are accounts you fund and control yourself. Some people have both.
Do retirement accounts charge fees?
They can — fund expenses, plan administration fees, and advice fees all reduce returns. Low-cost index funds inside an IRA are usually the cheapest route; comparing your plan’s fund fees is worth an hour once a year.
Conclusion
Retirement accounts are the most powerful everyday tool for building retirement savings, because the tax break compounds alongside the investments for decades. Start with the employer match, choose traditional or Roth by comparing your tax rate now with your expected rate later, use both a 401(k) and an IRA when you can, and keep the money invested until you need it. The account type matters less than the habit: regular contributions, left alone, do most of the work.
This guide is general education, not personal financial advice. Contribution limits, tax rules, and plan details change over time — check the current IRS figures and your own plan’s rules before making decisions about your retirement accounts.
Once your accounts are set up, see our retirement withdrawal calculator guide to work out a safe yearly withdrawal from them.