Key Takeaways
- The Solo 401(k) and SEP IRA both cap at $72,000 in 2026 - but the Solo 401(k) allows catch-up contributions ($8,000 for ages 50-59 and 64+; $11,250 for ages 60-63) while SEP IRA does not.
- The SIMPLE IRA limit is $17,000 in 2026 ($18,100 for employers with 25 or fewer employees). It's the easiest to administer but has the lowest ceiling.
- If you're self-employed with no employees, the Solo 401(k) is almost always the most powerful option - it allows Roth contributions and higher effective contributions at lower income levels.
- SEP IRA is the better choice if you have employees or want a simpler setup with a late contribution deadline (up to October 15 with extension).
- All three plans offer full tax deductibility. You can potentially run more than one if you have both W-2 income and self-employment income.
- ESOP plans are a different animal - they're about employee stock ownership, not individual contribution limits.
If you’re self-employed or running a small business, the retirement account options available to you are frankly better than what most corporate employees get — and most people don’t fully take advantage of them.
I hear from a lot of small business owners who are using a regular Roth or Traditional IRA when they could be sheltering $40,000, $50,000, or even $70,000+ a year. The gap between “what I could contribute” and “what I’m actually contributing” is one of the biggest missed opportunities in personal finance for the self-employed.
This page covers the main plans for 2026: the Solo 401(k), SEP IRA, SIMPLE IRA, and ESOP. The first three are the ones most self-employed individuals will actually consider — I’ll lay out the limits, who qualifies, and which one tends to win in different situations. For deeper dives, I’ve linked out to our dedicated posts for SEP IRA rules and limits and SIMPLE IRA limits.
Solo or Individual 401(k) Plans
The Solo 401(k) — also called an Individual 401(k) or One-Participant 401(k) — is available to self-employed individuals and business owners with no full-time employees other than a spouse. In this setup, you act as both employee and employer, which lets you make contributions from both sides.
That double contribution structure is what makes it so powerful. As the “employee,” you can defer up to $24,500 in 2026. As the “employer,” you can add a profit-sharing contribution of up to 25% of your W-2 wages (or ~20% of net self-employment income after SE tax). Combined, you can reach the Section 415(c) cap of $72,000 — and those over 50 can exceed it with catch-up contributions.
2026 Solo 401(k) Contribution Limits
| Year | Employee Deferral | Total Limit (415c) | Catch-Up (age 50–59, 64+) | Super Catch-Up (age 60–63) |
|---|---|---|---|---|
| 2022 | $20,500 | $61,000 | $6,500 | N/A |
| 2023 | $22,500 | $66,000 | $7,500 | N/A |
| 2024 | $23,000 | $69,000 | $7,500 | N/A |
| 2025 | $23,500 | $70,000 | $7,500 | $11,250 |
| 2026 | $24,500 | $72,000 | $8,000 | $11,250 |
| 2027 (est.) | $25,000 | $74,000 | $8,000 | $11,625 |
Looking ahead to 2027: The 415(c) total limit should hit approximately $74,000 based on ~2.5% COLA. The employee deferral is likely to reach $25,000. Catch-up limits typically lag by a year or two on inflation adjustments. Official numbers arrive with the October/November IRS announcement.
One feature I think is underappreciated: Solo 401(k) plans now support Roth contributions following SECURE 2.0. That means you can direct some or all of your employee deferrals to a Roth bucket — tax-free growth, no required minimum distributions. SEP IRAs don’t have that option. For higher earners who expect their tax rate to stay elevated in retirement, that can be a meaningful difference.
The catch: the Solo 401(k) plan must be established by December 31 of the year you want to make contributions for. You can fund it up to your tax filing deadline, but the plan itself needs to exist first. This is where people get caught — if you wait until March to open one for the prior year, you’re out of luck.
Also, it’s limited to businesses with no non-spouse employees. The moment you hire a full-time W-2 employee, you generally lose Solo 401(k) eligibility and need to transition to a different plan.
For a full comparison of the Solo 401(k) and SEP IRA side by side — including the formula for self-employed contribution calculations — see our SEP IRA and Solo 401(k) guide.
SIMPLE IRA
The SIMPLE IRA (Savings Incentive Match Plan for Employees) is designed for small businesses with up to 100 employees. It’s the easiest plan to set up and maintain — no discrimination testing, minimal paperwork, and low administrative cost. The tradeoff is a lower contribution ceiling than a Solo 401(k) or SEP IRA.
SIMPLE IRAs require an employer contribution. You have two options: a dollar-for-dollar match up to 3% of employee compensation, or a 2% nonelective contribution for all eligible employees (whether they contribute or not). That mandatory employer contribution is baked in — it’s part of the deal.
2026 SIMPLE IRA Contribution Limits
| Contribution Type | 2024 | 2025 | 2026 | 2027 (est.) |
|---|---|---|---|---|
| Standard employee deferral | $16,000 | $16,500 | $17,000 | $17,500 |
| Small employer plan (≤25 employees) | $17,600 | $17,600 | $18,100 | $18,600 |
| Catch-up (age 50–59, 64+) | $3,500 | $3,500 | $4,000 | $4,000 |
| Super catch-up (age 60–63) | $3,500 | $5,250 | $5,250 | $5,250 |
One important rule that catches people: the 2-year restriction. Funds held in a SIMPLE IRA for less than 2 years since your first contribution cannot be rolled over to a regular IRA or 401(k). Rolling out early triggers a 25% penalty (vs. the standard 10%). After two years, the account acts like a regular Traditional IRA for rollover purposes.
For full details, see our dedicated SIMPLE IRA contribution limits post.
SEP IRA
The SEP IRA (Simplified Employee Pension) is the go-to for self-employed individuals who want high contribution limits without the administrative complexity of a 401(k). Contributions come entirely from the employer side — there’s no employee elective deferral component.
2026 SEP IRA Contribution Limits
| Year | SEP IRA Limit | Compensation Cap |
|---|---|---|
| 2023 | $66,000 | $330,000 |
| 2024 | $69,000 | $345,000 |
| 2025 | $70,000 | $350,000 |
| 2026 | $72,000 | $360,000 |
| 2027 (est.) | $74,000 | $370,000 |
The limit is the lesser of $72,000 or 25% of compensation. For self-employed individuals, the effective rate works out to roughly 18–20% of net self-employment income after accounting for the SE tax deduction — not exactly 25%.
The big advantage over the Solo 401(k) is the contribution deadline: you can fund a SEP IRA all the way up to your tax filing deadline including extensions (October 15 with an extension). You can even open a new SEP IRA for a prior tax year during that window. This gives significant flexibility for self-employed individuals who don’t know their final income until late.
If you have employees, the SEP IRA requires you to contribute the same percentage of compensation for all eligible workers as you contribute for yourself. That mandatory requirement often makes it less attractive for business owners with staff.
ESOP Plans
An ESOP (Employee Stock Ownership Plan) is a different category entirely — it’s not primarily a contribution vehicle but a way to make employees partial owners of the company through stock. ESOPs are more common in mid-size private businesses as a succession tool or ownership transition mechanism.
In an ESOP, the company sets up a trust and contributes shares of company stock (or cash to purchase shares). Employees receive allocations over time, subject to vesting schedules. When employees leave, the company buys back shares at fair market value.
ESOPs are tax-deductible for the employer (within limits), and there are significant estate planning advantages for business owners selling a majority stake. They’re complex and expensive to set up — typically suitable for businesses with at least 20–30 employees and real company equity to transfer.
Which Plan Is Right for You?
A quick framework:
- Solo self-employed, want the highest possible contribution: Solo 401(k) — especially if you want catch-up contributions or a Roth option.
- Self-employed, want simplicity and a late deadline: SEP IRA — open it in October if you had a good year and want to reduce your tax bill.
- Small business with employees, want low admin: SIMPLE IRA — mandatory employer match is the cost, but setup is easy and costs are low.
- Looking to transition ownership: ESOP — consult a specialist, this isn’t a DIY setup.
And don’t forget: if you have a W-2 job in addition to self-employment income, you can generally also contribute to your employer’s 401(k) plan — the limits are separate from SEP IRA limits, and combining them can significantly increase total tax-sheltered savings.
Things can shift quickly when it comes to legislation and contribution limits. I’ll update this page when new information comes in — subscribe here to get notified.
Common Issues to Watch Out For
Missing the Solo 401(k) establishment deadline. The plan must exist by December 31. I see this mistake every year — someone has a great self-employment income year, tries to open a Solo 401(k) in February to capture the deduction, and finds out they can’t. The SEP IRA doesn’t have this problem: you can open and fund it up to your tax filing deadline.
Over-contributing when you have multiple plans. If you have a W-2 job and self-employment income, the $24,500 employee deferral limit is per person, not per plan. You can’t contribute $24,500 to your employer’s 401(k) and another $24,500 to your Solo 401(k). The employer profit-sharing portion of the Solo 401(k) is separate and can stack.
Using the wrong SEP IRA formula. The “25% of compensation” rule doesn’t mean 25% of gross self-employment income. The SE tax deduction changes the math — the effective rate is closer to 18–20%. Running the wrong calculation leads to over-contributions and IRS penalties.
SIMPLE IRA early rollover penalty. Rolling funds out of a SIMPLE IRA within the first two years since your first contribution triggers a 25% penalty, not the standard 10%. Most people don’t know this until it’s too late.
Assuming SEP IRA and SIMPLE IRA can coexist. Generally, an employer cannot maintain both a SEP IRA and a SIMPLE IRA covering the same employees in the same year.
