Retirement Accounts Compared: 401(k), IRA, Roth IRA, SEP IRA, Solo 401(k), and HSA

401(k) — Employer-Sponsored Retirement Plan

The 401(k) is the most common employer-sponsored retirement plan. For 2024, the employee contribution limit is $23,000 ($30,500 if age 50+ for catch-up contributions). Total contributions including employer match cannot exceed $69,000 or 100% of compensation (whichever is less). Contributions are pre-tax (reducing your taxable income now) and grow tax-deferred until withdrawal in retirement. Employer match is free money — typically 50% to 100% of your contributions up to 3-6% of salary. Withdrawals before age 59.5 incur a 10% penalty plus ordinary income tax. Required Minimum Distributions (RMDs) begin at age 73 (increasing to 75 in 2033). Investment options are limited to the plan's chosen fund menu. Tax-efficient retirement contributions →

Traditional IRA — Individual Retirement Account

The Traditional IRA allows individuals to contribute up to $7,000 in 2024 ($8,000 if age 50+). Contributions may be tax-deductible depending on your income and whether you or your spouse have a workplace retirement plan. For 2024, if you have a 401(k) at work and are single, the deduction phases out between $77K and $87K MAGI. For married filing jointly with a workplace plan, the phaseout is $123K to $143K. Growth is tax-deferred; withdrawals in retirement are taxed as ordinary income. Early withdrawals (before 59.5) incur a 10% penalty plus income tax. IRAs offer vastly more investment choices than 401(k)s — you can invest in virtually any stock, ETF, mutual fund, or bond. RMDs apply starting at age 73. Backdoor Roth IRA strategy for high earners →

Roth IRA — Tax-Free Growth Account

The Roth IRA offers the same $7,000 contribution limit as Traditional IRA ($8,000 if 50+) but with a fundamentally different tax treatment: contributions are made with after-tax dollars (no upfront deduction), but qualified withdrawals in retirement are completely tax-free — including all investment growth. This makes the Roth IRA extraordinarily powerful for long-term compounding. Income limits restrict direct Roth IRA contributions: for 2024, the phaseout for single filers is $146K to $161K MAGI; for married filing jointly, $230K to $240K. High earners can use the backdoor Roth IRA strategy. Roth IRAs have no RMDs during the original owner's lifetime, making them excellent for estate planning. Contributions (but not earnings) can be withdrawn at any time penalty-free.

SEP IRA — Simplified Employee Pension for Self-Employed

The SEP IRA is designed for self-employed individuals and small business owners. For 2024, the contribution limit is the lesser of 25% of compensation (or 20% of net self-employment income) or $69,000. Contributions are made by the employer (which can be you if self-employed) and are tax-deductible. Employees (including the business owner) cannot make employee contributions — only the employer contributes. SEP IRAs have simple setup and low administrative costs. All contributions are pre-tax, and withdrawals in retirement are taxed as ordinary income with the same 10% early withdrawal penalty before 59.5. RMDs apply at age 73. SEP IRAs are best for self-employed individuals with no employees or relatively stable income, though if you have employees, you must contribute the same percentage for all eligible employees.

Solo 401(k) — For Self-Employed with No Employees

The Solo 401(k) (also called Individual 401(k)) is for self-employed individuals with no employees (other than a spouse). It combines the high contribution limits of a 401(k) with the flexibility of an IRA. For 2024, you can contribute up to $23,000 as the employee (pre-tax or Roth) plus up to 25% of compensation as the employer (20% of net self-employment income), with total contributions capped at $69,000 ($76,500 if age 50+ catch-up). This means a self-employed person earning $200K can contribute roughly $23,000 (employee) + $40,000 (employer profit share) = $63,000 total. Solo 401(k)s can accept Roth contributions and can borrow from the plan (loan feature). They have higher contribution limits than SEP IRAs for lower earners because of the employee contribution component. Solo 401(k) setup and contribution strategies →

HSA — Health Savings Account (The Hidden Retirement Account)

The Health Savings Account (HSA) is technically a health savings vehicle but functions as the most tax-advantaged retirement account available. For 2024, contribution limits are $4,150 for individuals and $8,300 for families, with an additional $1,000 catch-up for age 55+. HSAs offer triple tax advantages: contributions are tax-deductible (or pre-tax through payroll), growth is tax-deferred, and qualified withdrawals for medical expenses are completely tax-free. After age 65, you can withdraw HSA funds for any purpose penalty-free (though non-medical withdrawals are taxed as ordinary income). HSAs have no income limits (anyone with a qualifying HDHP can contribute) and no RMDs. For retirement savers, the HSA is the most powerful account because of the triple tax advantage — no other account type offers this combination. HSA investing strategies for retirement →

Which retirement account should I contribute to first?

The standard prioritization order is: (1) 401(k) up to employer match — this is free money with an immediate 50-100% return. (2) HSA (if eligible) — triple tax advantages make it the most tax-efficient account available. (3) Roth IRA or Traditional IRA — max out to $7K/year ($8K if 50+). (4) 401(k) beyond the match — up to the $23K annual limit. (5) Taxable brokerage account — for any additional savings beyond retirement account limits. If you have a high-deductible health plan, the HSA should be prioritized after the 401(k) match but before IRA contributions because of the unique triple tax advantage. The order can vary based on your specific tax situation, income level, and retirement goals.

What is the difference between Traditional and Roth contributions?

Traditional contributions reduce your taxable income now (tax deduction upfront) but you pay taxes on withdrawals in retirement. Roth contributions provide no upfront tax deduction but qualified withdrawals are completely tax-free — all growth is tax-free. The choice depends on your current tax rate vs your expected retirement tax rate. If you expect to be in a higher tax bracket in retirement, Roth is better (pay taxes now at lower rate). If you expect to be in a lower tax bracket in retirement, Traditional is better (deduction now at higher rate, pay later at lower rate). Many people use a mix of both to create tax diversification in retirement, giving them flexibility to control their taxable income in each year of retirement.

What happens if I withdraw from retirement accounts early?

Early withdrawals (before age 59.5) from Traditional retirement accounts incur a 10% penalty plus ordinary income tax on the withdrawal amount. Roth IRA contributions can be withdrawn at any time penalty- and tax-free (but earnings withdrawn early incur tax and penalty). 401(k) early withdrawals face the 10% penalty plus income tax, but some plans allow loans or hardship withdrawals with different rules. Exceptions to the 10% penalty include: first-time home purchase ($10K limit from IRA), qualified education expenses, medical expenses exceeding 7.5% of AGI, disability, substantially equal periodic payments (SEPP, Rule 72(t)), and up to $5,000 for birth or adoption (SECURE Act 2.0). Early withdrawal is almost always a bad idea — it permanently reduces your retirement savings and triggers unnecessary taxes and penalties.

Can I have both a 401(k) and an IRA at the same time?

Yes, absolutely. You can contribute to both a 401(k) at work and an IRA (Traditional or Roth) in the same year, subject to the individual contribution limits for each. Having both accounts maximizes your total retirement savings capacity. The combined limit is $23K (401k) + $7K (IRA) = $30K/year ($38.5K if 50+). You may also have a spouse IRA even if only one spouse works. Having both accounts also provides diversification — you can use the IRA for investments not available in your 401(k) and have more control over fees and fund selection. Just be aware that if you (or your spouse) have a workplace retirement plan, the Traditional IRA deduction may be limited by your income level. Roth IRA contributions are always available within income limits (or via backdoor). Roth IRA conversion strategies →

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