401(k) vs. IRA vs. Roth IRA: How the Main Retirement Accounts Compare

Most Americans save for retirement through some combination of three accounts: a workplace 401(k), a traditional IRA and a Roth IRA. Each one is a tax wrapper, not an investment: inside, you choose funds, stocks or bonds. The differences lie in who can contribute, when you get the tax break, how much you can save and what happens when you take money out.

The core trade-off: tax now or tax later

Retirement accounts come in two tax flavors:

• Traditional (pre-tax): contributions reduce your taxable income today. The money grows tax-deferred, and withdrawals in retirement are taxed as ordinary income.
• Roth (after-tax): contributions get no deduction today. The money grows tax-free, and qualified withdrawals in retirement are tax-free.

Which is better depends largely on whether your tax rate is higher now or in retirement, which nobody knows for certain. Higher earners in their peak years often lean toward pre-tax saving; early-career savers in lower brackets often lean toward Roth. Many people split contributions between the two to diversify against future tax changes.

The 401(k)

A 401(k) is offered by an employer. Similar plans exist for nonprofit employees (403(b)) and many government workers (457(b)), and self-employed people can open a solo 401(k).

Key features:

• Payroll deductions: contributions come straight from your paycheck.
• Employer match: many employers contribute, often matching a share of what you put in. A match is effectively part of your compensation.
• Vesting: employer contributions may vest over several years; your own contributions are always yours.
• High limits: the annual employee contribution limit is considerably higher than the IRA limit, and employer contributions count toward a separate, larger overall limit.
• Roth option: many plans offer a Roth 401(k) alongside the traditional version. Unlike the Roth IRA, it has no income limit.
• Limited menu: you choose from the funds your plan offers, and plan fees vary widely.
• Loans: some plans allow you to borrow from your balance, with repayment rules.

The traditional IRA

An individual retirement account is opened by you at a bank, brokerage or other custodian, not through your employer.

• Eligibility: anyone with earned income can contribute, and a working spouse's income can support a contribution for a non-working spouse.
• Deduction rules: if neither you nor your spouse is covered by a workplace plan, contributions are generally fully deductible. If you are covered, the deduction phases out above income thresholds.
• Investment choice: almost anything your custodian offers, typically far more than a 401(k) menu.
• Rollover home: IRAs are commonly used to consolidate old 401(k)s when changing jobs.

The Roth IRA

• Income limits: your ability to contribute directly phases out above certain income levels.
• Tax-free growth: qualified withdrawals are tax-free, generally after age 59½ and once the account has been open for at least five tax years.
• Flexible contributions: your contributions (not earnings) can be withdrawn at any time without tax or penalty.
• No required minimum distributions for the original owner during their lifetime.

Higher earners above the income limits sometimes use a "backdoor" approach: a nondeductible traditional IRA contribution followed by a conversion to Roth. The tax treatment depends on the pro-rata rule, which counts all of your pre-tax IRA balances, so it is worth understanding before trying it.

Side-by-side

The IRS sets the dollar limits each year, including additional catch-up contributions for savers aged 50 and older, and publishes them at irs.gov. The traditional and Roth IRA share one combined limit.

Related accounts for the self-employed and small employers

The same tax logic extends to several other account types:

• SEP IRA: a simple plan for self-employed people and small businesses in which contributions are made by the employer (including a self-employed owner) and can be considerably larger than regular IRA contributions.
• SIMPLE IRA: a plan for small employers that combines employee salary deferrals with a required employer contribution, with limits between those of an IRA and a 401(k).
• Solo 401(k): for business owners with no employees other than a spouse, allowing contributions both as employee and as employer, often with a Roth option.

Each has its own rules on deadlines, eligibility and paperwork, summarized on the IRS retirement plans pages. Freelancers and gig workers often overlook them, even though they can shelter a meaningful share of self-employment income.

Withdrawals and penalties

All three accounts are designed for retirement, and early access comes at a cost:

• Withdrawals of pre-tax money or Roth earnings before age 59½ generally incur ordinary income tax (on pre-tax amounts or non-qualified earnings) plus a 10% additional tax.
• Exceptions exist, including disability, certain medical expenses, a series of substantially equal periodic payments, and (for 401(k)s) separating from your employer in or after the year you turn 55. Some exceptions apply only to IRAs, such as qualified higher-education expenses and a limited amount for a first-time home purchase.
• Required minimum distributions eventually force withdrawals from pre-tax accounts; that topic has its own article on FC Markets.

How people often sequence their saving

There is no single right order, but a commonly cited sequence is:

1. Contribute enough to the 401(k) to receive the full employer match, since unclaimed match is compensation left on the table.
2. Consider an IRA (Roth or traditional) for broader investment choice and potentially lower fund costs.
3. Return to the 401(k) to save more, up to the annual limit.
4. Use a taxable brokerage account for savings beyond that, or for goals before retirement.

Lower-income savers may also qualify for the Saver's Credit, a federal tax credit for retirement contributions.

Practical checks

Whatever mix you use, a few habits help: confirm your 401(k) contribution rate after every raise, check your plan's fees and fund menu each year, keep beneficiary designations current on every account, and track where old workplace plans ended up. The account rules change from time to time through legislation, so the IRS website is the place to confirm current limits and thresholds before you contribute.

This article is for general education and is not tax, legal or investment advice. Rules and limits change; confirm current figures with the IRS or a qualified professional.