Choosing where to hold your retirement savings can matter as much as what you invest in. The U.S. tax code offers several distinct account types, each with its own contribution limits, tax treatment, and rules for withdrawals. This guide compares the most common retirement account options so you can match the right vehicle to your income, tax bracket, and career stage.
Workplace Plans: 401(k) and 403(b) Accounts
If your employer offers a 401(k) or, for nonprofits and public schools, a 403(b), this is usually the first account to consider. Contributions come directly from your paycheck, and many employers match a portion of what you save. A common match formula is 50% of contributions up to 6% of salary, which is effectively an immediate return on your money that no market investment can reliably replicate.
For 2025, the IRS allows employees to defer up to $23,500 into a 401(k), 403(b), or most 457 plans, with an additional $7,500 catch-up contribution for those 50 and older. Participants aged 60 through 63 can contribute an even larger catch-up amount of $11,250 under the SECURE 2.0 Act. Traditional 401(k) contributions reduce your taxable income now, and withdrawals in retirement are taxed as ordinary income. Many plans also offer a Roth option, where you pay tax today and qualified withdrawals are tax-free.
Two caveats: investment menus are limited to what your plan offers, and fees vary widely. Check your plan's expense ratios and administrative costs at least once a year.
Individual Retirement Accounts: Traditional vs. Roth
IRAs give you a much broader investment universe than most workplace plans, including individual stocks, ETFs, and mutual funds. For 2025, the contribution limit is $7,000, plus a $1,000 catch-up for those 50 and older.
- Traditional IRA: Contributions may be tax-deductible depending on your income and whether you (or a spouse) are covered by a workplace plan. Earnings grow tax-deferred, and withdrawals are taxed as ordinary income after age 59½. Required minimum distributions (RMDs) begin at age 73.
- Roth IRA: Contributions are made with after-tax dollars, so there is no deduction now. Qualified withdrawals, including all growth, are tax-free. Roth IRAs have no RMDs during the owner's lifetime, which makes them useful for estate planning and for managing taxes later in retirement.
Roth IRA eligibility phases out at higher incomes: for 2025, the ability to contribute fully phases out between $150,000 and $165,000 of modified adjusted gross income for single filers, and between $236,000 and $246,000 for married couples filing jointly. Above those thresholds, a backdoor Roth strategy (a nondeductible traditional IRA contribution converted to a Roth) is a common workaround, though the pro-rata rule can complicate it if you hold other traditional IRA balances.
Self-Employment Options: SEP IRA and Solo 401(k)
If you are self-employed or run a small business with no employees beyond yourself and a spouse, the SEP IRA and Solo 401(k) allow far larger contributions than a standard IRA.
- SEP IRA: For 2025, you can contribute up to 25% of compensation, capped at $70,000. Setup is simple and administration is minimal, but contributions must be made for all eligible employees if you have them.
- Solo 401(k): Allows both an employee deferral (up to $23,500 in 2025, plus catch-up) and an employer profit-sharing contribution, for a combined limit of $70,000. It also supports Roth deferrals and loans, which SEP IRAs do not.
Health Savings Accounts as a Retirement Tool
A health savings account (HSA) is technically a medical account, but it is one of the most tax-efficient retirement vehicles available when paired with a high-deductible health plan. Contributions are deductible, growth is tax-free, and qualified medical withdrawals are tax-free, a triple tax advantage no other account offers. For 2025, the contribution limit is $4,300 for self-only coverage and $8,550 for family coverage, plus a $1,000 catch-up at 55. After age 65, non-medical withdrawals are taxed as ordinary income but escape the 20% penalty, making an HSA a flexible supplement to a 401(k).
How to Prioritize Your Contributions
A practical order of operations for most savers:
- Contribute enough to your 401(k) to capture the full employer match.
- Pay down high-interest debt, such as credit cards.
- Max out an HSA if you have qualifying coverage and can afford the medical deductible.
- Fund a Roth or traditional IRA, depending on your current tax bracket and income eligibility.
- Return to your 401(k) and increase contributions up to the annual limit.
- Use a taxable brokerage account for additional savings once tax-advantaged accounts are maxed.
The traditional-versus-Roth decision often comes down to tax rates. If you expect a higher tax rate in retirement than you face today, Roth contributions tend to win; if you are in a high bracket now and expect lower income later, pre-tax contributions usually make more sense. Many households benefit from holding both types, which provides tax diversification when you begin withdrawals.
What to Remember
Retirement accounts are not interchangeable. Workplace plans offer matches and high limits but limited investment choice; IRAs offer flexibility but lower caps; self-employed plans allow large contributions for business owners; and HSAs add a uniquely tax-free bucket for medical costs. Review your contribution limits each year, since the IRS adjusts them for inflation, and revisit your traditional-versus-Roth mix whenever your income or tax bracket changes materially.
