Retirement Planning for the Self-Employed: SEP IRA, Solo 401(k), and SIMPLE IRA Compared

Self-employed people face a retirement planning challenge that W-2 employees don’t: there’s no HR department automatically enrolling you in a 401(k) and no employer match landing in your account. The upside is that the retirement accounts available to self-employed workers often have higher contribution limits than employer-sponsored plans — if you know how to use them.

Here’s a breakdown of the three main retirement account options for freelancers, consultants, sole proprietors, and small business owners.

Option 1: SEP IRA (Simplified Employee Pension)

The SEP IRA is the simplest high-limit retirement account for self-employed people. It requires virtually no administrative work to set up or maintain.

Contribution Limits

You can contribute up to 25% of net self-employment income, up to a maximum of $70,000 for 2026 (subject to IRS adjustment; verify current limits at IRS.gov). This limit is per business, not per individual.

Note: For self-employed individuals, “25% of compensation” is calculated on net self-employment income after the self-employment tax deduction — which works out to about 20% of net profit before the deduction.

Who It’s Best For

  • High earners who want to shelter significant income
  • Business owners without employees (or who want to avoid the complexity of employee contributions)
  • Freelancers and consultants looking for simplicity

Downsides

  • Only employer contributions — there’s no employee contribution option for SEP IRAs
  • If you have employees, you must contribute the same percentage of compensation for them as you contribute for yourself
  • No Roth option; all SEP IRA contributions are pre-tax

Option 2: Solo 401(k) (Individual 401(k))

The Solo 401(k) — also called an Individual 401(k) or Self-Employed 401(k) — is the most powerful retirement savings tool for self-employed individuals with no employees (other than a spouse).

Contribution Limits

The Solo 401(k) allows contributions in two capacities:

  • Employee contribution: Up to $23,500 in 2026 (plus a $7,500 catch-up if you’re 50 or older)
  • Employer contribution: Up to 25% of net self-employment income

Combined, the total contribution limit is $70,000 for 2026 (or $77,500 with catch-up contributions). Critically, the employee contribution is a flat dollar amount — not a percentage of income — which means lower earners can shelter a higher percentage of their income than with a SEP IRA.

Example: A freelancer earning $60,000 in net profit could contribute $23,500 as the employee contribution + about $11,000 as the employer contribution = $34,500 total. With a SEP IRA, the same person could contribute only about $12,000 (20% of $60,000). The Solo 401(k) wins by nearly $22,500 in this scenario.

Roth Option

Many Solo 401(k) providers offer a Roth option for the employee contribution portion. Roth contributions are made with after-tax dollars and grow tax-free. This is a major advantage that SEP IRAs don’t offer.

Loan Provision

Depending on your plan documents, some Solo 401(k)s allow loans against the account balance — useful for business owners who need access to capital.

Who It’s Best For

  • Self-employed individuals with no full-time employees (a spouse who works in the business can participate)
  • Those with moderate-to-high incomes who want to maximize contributions
  • Anyone who wants Roth options or a loan provision

Downsides

  • More paperwork than a SEP IRA (you must file Form 5500-EZ once the account exceeds $250,000)
  • You cannot have a Solo 401(k) if you have any full-time non-spouse employees
  • Must be established by December 31 of the tax year (vs. SEP IRA, which can be opened up until the tax filing deadline including extensions)

Where to Open a Solo 401(k)

Fidelity, Charles Schwab, and Vanguard all offer free Solo 401(k) plans. Fidelity is often recommended for its no-fee structure and investment flexibility.

Option 3: SIMPLE IRA

The SIMPLE IRA (Savings Incentive Match Plan for Employees) is designed for small businesses with up to 100 employees. It’s less commonly used by solo freelancers but becomes relevant once you start hiring.

Contribution Limits

Employee contribution: up to $16,500 in 2026 (plus $3,500 catch-up for those 50+). Employer must contribute either a 3% match on employee compensation or a 2% non-elective contribution for all eligible employees.

Who It’s Best For

  • Small business owners with 1–100 employees
  • Those who want a simpler setup than a traditional 401(k) for a team

Downsides

  • Lower contribution limits than Solo 401(k) or SEP IRA
  • Early withdrawal penalty of 25% (vs. 10% for most accounts) if taken within the first two years of participation

Comparing the Three Options

Feature SEP IRA Solo 401(k) SIMPLE IRA
2026 max contribution $70,000 $70,000 ($77,500 with catch-up) $16,500 ($20,000 with catch-up)
Roth option No Yes (at many providers) Yes (starting 2024)
Employees allowed Yes (must contribute equally) No (except spouse) Yes, up to 100
Setup deadline Tax filing deadline Dec 31 of tax year Oct 1 of tax year
Administrative complexity Very low Low–medium Medium

Can You Contribute to Both a SEP IRA and a Solo 401(k)?

Generally, you can only maintain one type of plan at a time for the same business. However, if you have income from multiple sources — for example, a W-2 job and a freelance business — you may be able to contribute to a 401(k) at your employer and a SEP IRA or Solo 401(k) for your self-employment income. The rules are nuanced and worth reviewing with a tax professional.

The Bottom Line

For most self-employed individuals without employees, the Solo 401(k) offers the most flexibility and the highest potential contributions at lower income levels. The SEP IRA is simpler to set up and maintain, making it a good choice for high earners who want a straightforward plan. The SIMPLE IRA is best once you start bringing on employees and need a structured employer-contribution plan.

The most important step is simply getting started. Any of these accounts will grow tax-deferred (or tax-free with Roth options), giving you decades of compounding that working for yourself doesn’t come with automatically.


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Related: What Is a SIMPLE IRA? 2026.