
Debbie Carlson is a veteran financial journalist who writes about many personal finance and financial industry topics such as retirement, consumer spending, sustainable and ESG investing, commodity markets, exchanged-traded funds, mutual funds and much more, in an easy-to-understand way. Debbie writes for many high-level and top-tier media organizations and has contributed to Barron's, Chicago Tribune, The Guardian, MarketWatch, The Wall Street Journal, and U.S. News & World Report, among other publications. She holds a BA in Journalism from Eastern Illinois University.
As a 30+ year member of the AICPA, Nancy has experienced all facets of finance, including tax, auditing, payroll, plan benefits, and small business accounting. Her résumé includes years at KPMG International and McDonald’s Corporation. She now runs her own accounting business, serving several small clients in industries ranging from law and education to the arts.

So youâve decided to ditch the corporate job and join the ranks of the self-employed. Itâs a bold step. Taking charge of your own career means setting your own hours, implementing your own strategy, and being your own boss. But it doesnât mean having to sacrifice your retirement savings plan.
As an independent contractor, freelancer, gig worker, or small business owner, you can choose between two specialized retirement plans: a solo 401(k) or simplified employee pension plan individual retirement account (SEP IRA). Choosing the right self-employed retirement plan depends on your income, goals, and how you structure your business.
A SEP IRA works like a traditional IRA. Contributed funds are tax deductible and grow tax deferred until retirement. The plan is particularly useful for gig workers who have a traditional 401(k) through a primary job, but want to save additional income earned from side work for retirement.
| Pros | Cons |
|---|---|
| Allows contributions of up to 25% of net income (after deducting half of your self-employment tax and contributions to the SEP), up to $69,000 in 2024 and $70,000 in 2025 | Doesnât permit catch-up contributions |
| Simple to set up and maintain | No Roth option offered; catch-up contributions not permitted |
| Permits contributions to employeesâ retirement if the business grows | Requires employers to contribute equally to all employees, including themselves |
SEP IRA plans are subject to the same rules as traditional IRA plans when it comes to withdrawals. SEP IRA holders pay taxes on withdrawals and incur a 10% penalty for early withdrawals. There are also required minimum distributions that start at age 73.
New tax rules enacted with the passage of the One Big Beautiful Bill Act start taking effect as early as Sept. 30, 2025, with many more arriving in 2026. From deduction changes to credit rollbacks, the updates could reshape your budget and your tax return. Learn more about how the new law affects your finances.
A solo 401(k) is similar to a traditional 401(k), offering tax breaks, tax-deferred growth, and the option to open a Roth account. But itâs specifically designed for business owners with no employees, although the ownerâs spouse can also participate if they earn income from the business.
As both the employee and employer, you can make two types of contributions:
Unlike a SEP IRA, which limits contributions to 25% of income, a solo 401(k) allows you to contribute the full employee limit in addition to the employer portion. This flexibility helps you maximize your retirement savings.
If you choose a solo 401(k) and your business grows beyond you and your spouse, remember that you canât add another employee to the plan. And if you own two businesses or work a second job, your limits are by person, not by job.
| SEP IRA | Solo 401(k) | |
|---|---|---|
| Allows catch-up contributions | No | Yes |
| Maximum contribution | $69,000 in 2024; $70,000 in 2025 | $69,000 in 2024 ($76,500 with catch-up); $70,000 in 2025 ($77,500 with catch-up or $81,250 for ages 60 to 63) |
| Contribution rates | Up to 25% of income | Employee portion: up to $23,000 in 2024 and $23,500 in 2025, plus a $7,500 catch-up ($11,250 for ages 60 to 63 in 2025). Employer portion: up to 25% of income. |
| Include other (non-spouse) employees | Yes | No |
| Roth version available | No | Yes |
Plug your numbers into the retirement calculator to determine if your savings are on track. Are you contributing enough to retire comfortably?
As a self-employed person, you control your schedule and strategyâand your retirement savings can reflect that. Whether you choose a SEP IRA or a solo 401(k), these plans offer flexibility to suit your needs.
Unlike a company 401(k), which might limit your investment choices to a few mutual funds or one fund family, these plans give you ultimate discretion over your investments and allocation. Generally speaking, that means you get access to a much wider selection of investment choicesâstocks, bonds, exchange-traded funds (ETFs), and even some alternative investments are allowed.