Retirement Plans for Self-Employed Workers: What to Choose

Being self-employed removes the automatic retirement-plan enrollment that many employees receive at work, but it also creates more choice.

A freelancer, consultant, sole proprietor, independent contractor, or small-business owner may be able to choose among a one-participant 401(k), SEP IRA, SIMPLE IRA, personal IRA, or a more advanced retirement plan.

The names can make the decision sound more complicated than it is.

Start with three questions:

1. Do you have employees other than your spouse?
2. How much of your business income do you realistically want to save?
3. How much administration are you willing to accept?

Those answers eliminate many unsuitable choices quickly.

Compare the Main Self-Employed Retirement Plans

The dollar limits do not mean every self-employed person can contribute the maximum. Business compensation, plan design, other retirement plans, age, and the special self-employed contribution calculation can all reduce the amount available.

Contribution limits also change over time. The figures above are the IRS limits for 2026.

Solo 401(k): Strong Flexibility for an Owner-Only Business

The IRS calls this a one-participant 401(k). Financial institutions may call it a Solo 401(k), Solo-k, individual 401(k), or Uni-k.

It is not a separate legal category of retirement plan. It is generally a regular 401(k) covering a business owner with no common-law employees, or the owner and spouse.

The feature that makes it powerful is that the owner participates in two capacities.

You Contribute as the Employee

For 2026, the basic elective-deferral limit for most 401(k) plans is $24,500.

If the plan permits catch-up contributions:

• participants age 50 or older can generally contribute an additional $8,000; and
• participants who turn age 60, 61, 62, or 63 during 2026 can have a higher catch-up limit of $11,250 instead.

Your compensation or earned income still limits how much you can defer.

You Also Contribute as the Employer

The business can make an employer nonelective contribution in addition to the employee deferral.

For 2026, total defined-contribution plan additions generally cannot exceed $72,000 before eligible catch-up contributions, and compensation limits still apply. The 401(k) Calculator can help model contribution growth and matching assumptions, although self-employed employer contributions still require the applicable business-income calculation.

For a self-employed sole proprietor or partner, the employer contribution is not simply 25% of the number shown as business profit. IRS requires a special calculation of earned income after adjustments for the deductible portion of self-employment tax and the owner’s own plan contribution.

A plan can also permit designated Roth 401(k) contributions. Whether Roth contributions are available depends on the plan document and provider.

Solo 401(k) Administration Increases as the Plan Grows

IRS states that a one-participant 401(k) generally must file Form 5500-EZ when plan assets reach at least $250,000 at year-end. Other filing situations can also apply, including plan termination.

The owner must also operate the plan according to the plan document.

If the business later hires employees who satisfy the plan’s eligibility requirements, the simple owner-only advantage disappears. The plan can become subject to the same employee coverage and nondiscrimination rules that apply to other 401(k) plans unless an applicable design exception applies.

SEP IRA: Simpler Administration and Flexible Employer Contributions

A Simplified Employee Pension, or SEP, allows an employer to make contributions to SEP-IRAs established for the owner and eligible employees.

IRS describes the SEP as relatively easy to establish and operate. The employer generally has no annual federal filing requirement for the SEP itself.

Only the employer contributes.

That means there is:

• no employee salary-deferral contribution;
• no age-50 catch-up contribution under the SEP contribution rules; and
• no separate employee deferral on top of the employer contribution.

For 2026, SEP contributions cannot exceed the lesser of:

• 25% of the employee’s compensation; or
• $72,000.

For a self-employed owner, IRS uses a special net-earnings calculation. Publication 560 provides the worksheet and reduced contribution rate needed to solve the circular calculation created by deducting the owner’s own contribution.

Why SEP Can Be Attractive

A SEP can work well when:

• you want minimal plan administration;
• business profit varies significantly from year to year;
• you want the option to contribute more in strong years and less—or nothing—in weaker years; or
• you want to establish a plan relatively late in the tax-filing cycle.

IRS states that a SEP can generally be established for a year as late as the due date, including extensions, of the business income tax return for that year.

The Employee Rule Can Make SEP Expensive

A SEP becomes less owner-centric once eligible employees exist.

IRS requires employer contributions to follow the plan’s allocation formula. Under a typical SEP, the employer must contribute the same percentage of compensation for all eligible participants when a contribution is made.

This is a major reason to evaluate employee costs before choosing a SEP simply because it is easy to open.

SIMPLE IRA: A Small-Employer Plan With Required Contributions

A SIMPLE IRA is designed for smaller employers and combines employee salary reductions with required employer contributions.

IRS generally makes SIMPLE IRA plans available to businesses with 100 or fewer employees who received at least $5,000 in compensation in the preceding year, subject to the detailed eligibility rules. The employer generally cannot maintain another retirement plan at the same time.

For 2026:

• the general employee salary-reduction limit is $17,000;
• a higher $18,100 limit applies to certain SIMPLE plans under SECURE 2.0;
• the general age-50 catch-up limit is $4,000; and
• participants age 60 through 63 can have a higher $5,250 catch-up limit.

The employer must generally choose an annual contribution formula, commonly:

• a matching contribution up to 3% of compensation; or
• a 2% nonelective contribution for eligible employees, even if an employee does not make salary-reduction contributions.

SECURE 2.0 added additional SIMPLE contribution options for qualifying employers, so a business using the newer enhanced contribution rules should follow the current IRS guidance rather than relying on an older SIMPLE IRA summary.

When SIMPLE IRA Can Make Sense

A SIMPLE IRA can be attractive when you have employees and want:

• employee salary deferrals;
• mandatory but relatively straightforward employer contributions;
• no annual employer federal filing requirement for the SIMPLE IRA plan; and
• less administration than many conventional 401(k) arrangements.

The trade-off is that the contribution limits and plan flexibility can be lower than with a full 401(k), while the employer still has a contribution obligation each year.

SIMPLE IRA loans are not permitted. Early distributions can also have special rules: IRS states that a distribution during the first two years of participation can be subject to a 25% additional tax instead of the usual 10% when an exception does not apply.

A Traditional or Roth IRA Can Still Belong in the Plan

Opening a Solo 401(k), SEP IRA, or SIMPLE IRA does not automatically make a personal IRA irrelevant.

For 2026, the combined contribution limit across your Traditional and Roth IRAs is:

• $7,500 if under age 50; or
• $8,600 if age 50 or older, including the $1,100 catch-up.

A personal IRA can be useful because:

• it is easy to open;
• it can supplement business-plan savings;
• a Roth IRA provides a different tax bucket when you qualify to contribute; and
• you control the investment provider independently from the business plan.

But the tax treatment depends on income and plan coverage. The Roth vs. Traditional IRA guide explains that tax-timing decision, and the Roth IRA Calculator can model potential tax-free retirement growth under your assumptions.

Traditional IRA contributions can be nondeductible or have a deduction phased out when you or your spouse is covered by a retirement plan at work and income exceeds the applicable limits.

Direct Roth IRA contributions also have income limits. For 2026, the Roth IRA contribution phase-out is:

• $153,000 to $168,000 of modified AGI for single and head-of-household filers; and
• $242,000 to $252,000 for married couples filing jointly.

The IRA contribution limit is much smaller than the potential business-plan limits, so an IRA alone may not be enough for a high-income self-employed worker who wants to save aggressively.

If You Have a Day Job and a Side Business, Watch Shared Limits

A common scenario is an employee with a 401(k) at work who also earns self-employment income from consulting, freelancing, or another side business.

You may be able to establish a Solo 401(k) for the side business if it otherwise qualifies.

But you do not get a fresh employee elective-deferral limit simply because there are two plans.

IRS states that the annual elective-deferral limit is by person, not by plan.

The side business may still be able to make an employer contribution based on eligible business compensation, subject to the applicable plan and aggregation rules.

Multiple businesses can also create controlled-group or affiliated-employer issues. If you own related businesses, do not assume each business can be treated independently simply because it has a separate legal entity.

Your Business Structure Changes the Contribution Math

Contribution limits are often quoted as though every self-employed worker receives compensation in the same way.

They do not.

A sole proprietor reports business income differently from an owner-employee of a corporation. A partner has a different compensation calculation again.

For an unincorporated self-employed individual, IRS defines plan compensation from net earnings from self-employment after reducing it by:

• the deductible portion of self-employment tax; and
• the individual’s own retirement-plan contribution.

This creates the circular calculation used for SEP and qualified-plan employer contributions.

For employees of a corporation, plan compensation generally follows the plan’s definition of employee compensation, often based on W-2 wages under the applicable plan rules.

IRS Publication 560 includes worksheets for self-employed plan contributions. Tax software or a qualified tax professional can also be useful when business structure, multiple plans, or employees make the calculation more complex.

Employees Can Change the Best Plan Completely

The strongest plan for a solo consultant may be a poor fit after the first employee is hired.

Do not evaluate only your own maximum contribution.

Also compare:

• required contributions for employees;
• eligibility rules;
• vesting;
• annual notices;
• plan testing;
• tax filings;
• provider and recordkeeping fees; and
• how difficult it will be to change the plan later.

For an owner with substantial, stable income who wants to save considerably more than ordinary defined-contribution limits allow, a defined-benefit or cash-balance plan can sometimes provide much larger deductible contributions. Those plans require actuarial calculations and substantially more administration, so they are a specialist option rather than the default starting point for a freelancer.

Which Self-Employed Retirement Plan Should You Choose?

A practical decision framework looks like this:

Consider a Solo 401(k) If…

• you have no common-law employees other than a spouse;
• you want to maximize contribution flexibility at moderate or high self-employment income;
• you value employee plus employer contribution capacity;
• you may want a designated Roth feature if your plan offers it; and
• you are comfortable with somewhat more administration.

Consider a SEP IRA If…

• simplicity is a priority;
• you want flexible employer contributions from year to year;
• you have no employees or are comfortable making required proportional contributions for eligible employees; and
• you do not need employee salary deferrals.

Consider a SIMPLE IRA If…

• you have a small business with employees;
• you want employees to make salary-deferral contributions;
• you accept required annual employer contributions; and
• you prefer simpler administration than many conventional 401(k) plans.

Consider a Personal IRA If…

• you want the simplest possible retirement account;
• your desired annual savings fit within the IRA limit;
• you want to supplement a business retirement plan; or
• you want to add Roth tax diversification and meet the applicable income rules.

You do not necessarily have to pick only one account.

A self-employed worker might use a Solo 401(k) plus a Roth IRA, for example. The accounts solve different parts of the savings problem and have different contribution and tax rules.

Before deciding, calculate the amount you can actually contribute under each option using your business structure and compensation—not just the advertised maximum.

Once the account is chosen, the broader retirement savings target determines how aggressively it should be funded. The Retirement Calculator can help test whether the resulting contribution path is on track for the amount you expect to need.