Self-Employed Retirement Plans - SEP IRA, Solo 401(k) & SIMPLE IRA

Why Self-Employed Retirement Planning Differs

When you work for an employer, retirement savings is relatively straightforward. Your company offers a 401(k), you enroll, set a contribution percentage, and your employer may add a matching contribution. When you are self-employed, whether as a freelancer, independent contractor, sole proprietor, or small business owner, the responsibility for setting up and funding a retirement plan falls entirely on you.

The good news is that self-employed individuals often have access to retirement plans with higher contribution limits than a standard employer 401(k). Because you function as both the employer and the employee, you can make contributions in both capacities, potentially allowing you to shelter significantly more income from taxes each year. The challenge is choosing the right plan from several available options, each with different rules, limits, and administrative requirements.

Without an employer-sponsored plan, there is no automatic enrollment, no payroll deduction, and no employer match to nudge you toward saving. You must actively choose a plan, open the account, calculate your contributions, and make deposits on your own schedule. This requires more effort but also provides more control and flexibility over your retirement strategy.

The three most common retirement plans for self-employed individuals are the SEP IRA, Solo 401(k) (also called an Individual 401(k)), and SIMPLE IRA. Each serves different situations depending on your income level, whether you have employees, and how much you want to contribute.

SEP IRA (Simplified Employee Pension)

A SEP IRA is one of the simplest and most popular retirement plans for self-employed individuals and small business owners. It functions like a traditional IRA but with much higher contribution limits. Contributions are made by the employer (you, as the business owner) on behalf of each eligible employee, including yourself.

SEP IRA Rules and Contribution Limits

• 2026 contribution limit: The lesser of 25% of net self-employment income or $70,000.
• Contribution type: Employer contributions only. There is no employee elective deferral option, which means all contributions are tax-deductible business expenses.
• Tax treatment: Traditional (pre-tax) contributions only. There is no Roth option for SEP IRAs.
• Eligibility: Any self-employed individual or business owner, regardless of business size.
• Employee coverage requirement: If you have eligible employees (age 21+, worked for you in 3 of the last 5 years, earned at least $750), you must contribute the same percentage of salary for them as you do for yourself.
• Deadline to establish and fund: You can set up and fund a SEP IRA as late as your tax filing deadline, including extensions (typically October 15 for sole proprietors).

SEP IRA Pros and Cons

• Pros: Extremely easy to set up (single-page IRS form), no annual filing requirements, flexible contributions (you can vary the amount year to year), high contribution limits, and late establishment deadline.
• Cons: No Roth option, no employee elective deferrals, no catch-up contributions for those 50 and older, and the requirement to cover eligible employees at the same contribution percentage can be expensive for businesses with staff.

Solo 401(k) (Individual 401(k))

A Solo 401(k), also known as an Individual 401(k) or one-participant 401(k), is designed specifically for self-employed individuals and business owners with no full-time employees other than a spouse. It offers the highest potential contribution limits of any self-employed retirement plan because it allows both employee deferrals and employer profit-sharing contributions.

Solo 401(k) Rules and Contribution Limits

• 2026 employee deferral limit: $24,500 (same as a regular 401(k)), plus $8,000 catch-up if age 50+, or $11,250 super catch-up if age 60-63.
• 2026 employer profit-sharing limit: Up to 25% of net self-employment income.
• 2026 combined maximum: $70,000 total ($78,000 with standard catch-up, $81,250 with super catch-up).
• Roth option: Yes. Many Solo 401(k) providers offer a Roth designated account for employee deferrals.
• Eligibility: Self-employed individuals with no common-law employees other than a spouse. If you hire full-time employees, you generally cannot use a Solo 401(k).
• Loan provision: Many plans allow loans of up to $50,000 or 50% of the vested balance.
• Deadline to establish: Must be established by December 31 of the tax year (employer contributions can be made until the tax filing deadline).

Solo 401(k) Pros and Cons

• Pros: Highest contribution limits among self-employed plans, Roth contribution option, catch-up contributions for those 50+, loan availability, and the ability to make both employee and employer contributions.
• Cons: More complex to set up than a SEP IRA, must be established by December 31 (not by tax filing deadline), annual IRS Form 5500-EZ filing required once assets exceed $250,000, and not available if you have employees other than a spouse.

SIMPLE IRA (Savings Incentive Match Plan for Employees)

A SIMPLE IRA is designed for small businesses with 100 or fewer employees who earned at least $5,000 in the prior year. It is easier to administer than a traditional 401(k) but has lower contribution limits. Self-employed individuals can use a SIMPLE IRA, but it is most commonly chosen by small businesses that want a retirement benefit for their employees without the complexity of a 401(k).

SIMPLE IRA Rules and Contribution Limits

• 2026 employee deferral limit: $16,500, plus $3,500 catch-up if age 50+, or $5,250 super catch-up if age 60-63.
• Employer contribution requirement: The employer must either match employee contributions dollar-for-dollar up to 3% of compensation (can be reduced to 1% in two of any five years) or make a 2% non-elective contribution for all eligible employees regardless of whether they contribute.
• Tax treatment: Traditional (pre-tax) only. Roth SIMPLE IRAs became available starting in 2023 under the SECURE 2.0 Act, but availability depends on whether the plan sponsor offers this option.
• Eligibility: Businesses with 100 or fewer employees who earned at least $5,000 in the preceding year.
• Early withdrawal penalty: Withdrawals within the first two years of participation are subject to a 25% penalty (instead of the usual 10%).
• Deadline to establish: Must be established by October 1 of the year the plan is to take effect (for new employers, as soon as administratively feasible).

SIMPLE IRA Pros and Cons

• Pros: Simple to administer, no annual IRS filings (Form 5500), mandatory employer contribution ensures employees receive retirement benefits, and lower cost than a traditional 401(k) plan.
• Cons: Lower contribution limits than a SEP IRA or Solo 401(k), mandatory employer contribution (cannot skip in lean years), 25% early withdrawal penalty in the first two years, and you cannot maintain a SIMPLE IRA and another employer retirement plan simultaneously.

Side-by-Side Comparison

The following table provides a comprehensive comparison of the three main self-employed retirement plan options, making it easier to identify which plan best fits your business structure, income level, and savings goals.

Feature	SEP IRA	Solo 401(k)	SIMPLE IRA
2026 Max Employee Deferral	N/A (employer contributions only)	$24,500	$16,500
2026 Max Employer Contribution	25% of net SE income (up to $70,000)	25% of net SE income	3% match or 2% non-elective
2026 Total Maximum	$70,000	$70,000 (combined)	~$19,500-$22,000 (with match)
Catch-Up (Age 50+)	None	$8,000	$3,500
Super Catch-Up (Age 60-63)	None	$11,250	$5,250
Roth Option	No	Yes (employee deferrals)	Limited (SECURE 2.0, plan dependent)
Loan Option	No	Yes (up to $50,000)	No
Employees Allowed	Yes (must contribute equally)	No (spouse only)	Yes (up to 100 employees)
Establishment Deadline	Tax filing deadline (with extensions)	December 31 of tax year	October 1 of tax year
Annual Filing Required	No	Form 5500-EZ if assets > $250K	No
Setup Complexity	Very simple (one form)	Moderate (plan document required)	Simple (IRS model forms)
Best For	High earners, variable income, late planners	Solo entrepreneurs wanting max savings	Small businesses with employees

How to Open and Fund Each Account

Setting up a self-employed retirement plan is straightforward with most major brokerage firms and financial institutions. Here is the process for each plan type.

Opening a SEP IRA

1. Choose a brokerage or financial institution: Most major brokerages (Fidelity, Schwab, Vanguard, and others) offer SEP IRAs with no setup fees and access to low-cost index funds.
2. Complete IRS Form 5305-SEP: This one-page document establishes the plan. You keep it for your records; it is not filed with the IRS.
3. Open the account online: The brokerage will walk you through the application, which typically takes 15 to 30 minutes.
4. Calculate your contribution: For sole proprietors, the formula is net self-employment income minus half of self-employment tax, multiplied by your contribution rate (up to 25%). Many brokerages and tax software programs include a SEP contribution calculator.
5. Make your contribution: You can contribute any time during the year and up until your tax filing deadline (including extensions).

Opening a Solo 401(k)

1. Choose a provider: Not all brokerages offer Solo 401(k) plans. Fidelity, Schwab, and E*TRADE offer free plans. For Roth Solo 401(k) options or more flexibility, some providers charge an annual fee.
2. Complete the plan adoption agreement: This is more involved than a SEP IRA and requires a plan document. Most providers supply pre-approved documents.
3. Obtain an Employer Identification Number (EIN): If you do not already have one, you need an EIN from the IRS (free, available online at irs.gov).
4. Open the account: Apply online or by mail through your chosen provider.
5. Make contributions: Employee deferrals should ideally be made by December 31. Employer profit-sharing contributions can be made until the tax filing deadline.

Opening a SIMPLE IRA

1. Choose a financial institution: The employer selects the institution where all SIMPLE IRA accounts will be held, though employees can transfer their balances to another institution.
2. Complete IRS Form 5304-SIMPLE or 5305-SIMPLE: These model forms establish the plan. Form 5304 allows employees to choose their own financial institution, while 5305 requires all accounts to be at the same institution.
3. Notify eligible employees: You must provide an annual notification to employees about their right to participate and the plan's terms.
4. Establish by October 1: The plan must generally be set up by October 1 of the year it takes effect.
5. Deposit contributions: Employee salary deferrals must be deposited within 30 days of being withheld. Employer matching or non-elective contributions are due by the tax filing deadline.

Which Plan Fits Which Situation

The right plan depends on your specific circumstances. Here are common scenarios and the plan that typically fits best.

• You are a freelancer or sole proprietor with no employees and want to maximize contributions: The Solo 401(k) is typically the best choice because it allows both employee deferrals and employer contributions, enabling you to contribute more than a SEP IRA at most income levels below approximately $300,000.
• You have high self-employment income and want simplicity: If you earn enough that 25% of your net income approaches the $70,000 cap, a SEP IRA offers similar maximum contributions with simpler administration. It is also ideal if you are establishing a plan after December 31 since SEP IRAs can be opened until the tax filing deadline.
• You want Roth retirement savings: The Solo 401(k) is your only option among these three plans for making designated Roth contributions (SIMPLE IRA Roth availability is limited and plan-dependent). This is valuable for younger self-employed individuals who expect to be in a higher tax bracket in retirement.
• You have a small business with employees: If you have full-time employees, the Solo 401(k) is not an option. A SIMPLE IRA is easier and less expensive to administer than a traditional 401(k) but still provides a retirement benefit to your staff. A SEP IRA is also an option, but you must contribute the same percentage of salary for all eligible employees as you do for yourself, which can be costly.
• Your income varies significantly year to year: The SEP IRA offers the most flexibility because contributions are entirely discretionary. You can contribute up to 25% in a good year and nothing in a lean year. Solo 401(k) employee deferrals are also voluntary, but the administrative requirements are higher.
• You are age 50 or older and want catch-up contributions: The Solo 401(k) offers the largest catch-up provisions ($8,000 standard, $11,250 for ages 60-63). The SIMPLE IRA allows catch-up contributions but at lower amounts ($3,500 standard, $5,250 for ages 60-63). The SEP IRA has no catch-up provision at all.