For a self-employed person choosing between a SEP IRA and solo 401(k), which account type and provider make the most sense this year?

For 2026, if you're self-employed with no employees other than possibly your spouse, I would generally choose a solo 401(k) over a SEP IRA—and Fidelity would be my default provider.

My pick: Solo 401(k) at Fidelity

The big advantage is that a solo 401(k) lets you contribute as both employee and employer. In 2026, the employee deferral limit is $24,500, and total employee + employer contributions can reach $72,000 before applicable catch-ups.

A SEP, by contrast, is employer-contribution-only: generally up to 25% of compensation, capped at $72,000 in 2026.

Why I like Fidelity

Fidelity Investments is particularly attractive because its self-employed 401(k) currently has no account fees, supports traditional and Roth contributions, and allows investments across Fidelity's brokerage lineup.

E*TRADE is another strong choice if you specifically want a traditional + Roth individual 401(k) with broad investment flexibility; its plan explicitly supports both contribution types.

When I'd choose a SEP instead

A SEP IRA makes more sense if simplicity is your overriding priority, particularly if:

• your income is relatively high but you don't need the employee-deferral feature;
• you want virtually no plan administration;
• you're likely to have employees and want a straightforward employer retirement plan; or
• you want the flexibility to decide each year how much to contribute.

The important employee issue is that if you have eligible employees, a SEP generally requires you to contribute the same percentage of compensation for yourself and eligible employees.

One important 2026 wrinkle

If you're 50+, the solo 401(k) becomes even more compelling. The regular catch-up is $8,000 in 2026, and it's $11,250 for someone aged 60–63 if the plan permits it.

Also, Fidelity now offers a Roth feature for its self-employed 401(k), which is particularly relevant under the 2026 SECURE 2.0 catch-up rules.

Bottom line:
Solo 401(k) + Fidelity is my default recommendation for a one-person business in 2026. I'd pick SEP IRA mainly when simplicity or having employees outweighs the solo 401(k)'s additional contribution flexibility.

If you give me your age, approximate 2026 net self-employment income, whether you have a W-2 job/401(k), and whether you have employees, I can calculate which one would let you contribute more and estimate the tax savings.

Choosing between a SEP IRA and a Solo 401(k) comes down to how much you earn, whether you want catch-up contributions or Roth options, and how much administrative paperwork you are willing to tolerate. Both share a maximum combined contribution limit of $72,000 , but the path to get there is very different.

Which Account Type Makes Sense?

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

Best for: Maximizing contributions at lower income levels, Roth flexibility, and borrowing capabilities.

• How it works: You contribute in a dual role—both as the "employee" (salary deferral) and the "employer" (profit sharing).
• 2026 Contribution Limits: Employee elective deferrals up to $24,500 (plus an extra $8,000 catch-up if you are 50 or older, or $11,250 if aged 60–63). On the employer side, you can add up to 25% of net self-employment earnings, up to a total combined cap of $72,000 (excluding standard catch-ups).
• Key Advantages:
  • Allows you to reach the maximum limits on much lower net income compared to a SEP IRA.
  • Offers Roth contribution options.
  • Permits participant loans (borrowing up to 50% of your balance or $50,000, whichever is less).
• Downside: Requires an annual IRS information filing (Form 5500-EZ) once total plan assets exceed $250,000.

SEP IRA

Best for: Ultimate simplicity and late-funding flexibility without tracking employee vs. employer buckets.

• How it works: Funded purely by employer contributions (up to 25% of net earnings from self-employment, roughly 20% for sole proprietors) up to $72,000.
• Key Advantages:
  • Incredibly easy to open and maintain.
  • No annual IRS reporting forms required by the business.
• Downside: You need a significantly higher net self-employment income (roughly $288,000) to max out the $72,000 limit since there is no $24,500 employee slice. No traditional loan options or catch-up contributions are permitted.

Top Providers

• Fidelity Investments: Rated as the best overall provider for a Fidelity Solo 401(k) Plan and SEP IRAs due to $0 trade commissions, robust research tools, and strong customer support with virtually no hidden custodial maintenance fees.
• Charles Schwab: Excellent choice for low-fee mainstream investing, offering seamless execution for both Charles Schwab SEP IRA and individual plans without annual account fees.
• E*TRADE: Highly recommended if you want advanced account features, intuitive self-directed trading, and solid digital tools for tracking individual retirement accounts.
• Specialty Custodians (e.g., IRA Financial or Rocket Dollar): Best if you intend to use your Solo 401(k) or SEP structure for alternative assets like real estate or private equity (checkbook control), though these usually involve setup and monthly/annual administrative fees.

To help narrow down the choice, could you share your estimated net self-employment income and whether you plan to invest in standard stocks/ETFs or alternative assets like real estate?

A Solo 401(k) generally makes more financial and structural sense for a self-employed individual with no W-2 employees (other than a spouse), provided you want higher effective contribution limits at lower income levels, Roth options, or loan features.

Solo 401(k) vs. SEP IRA: Which Account Type?

• Solo 401(k) Wins If:
  • You want to contribute more at lower income: You can contribute as both the "employee" (up to $24,500 for 2026) plus an "employer" profit-sharing contribution (up to 20% of net self-employment earnings), hitting a total maximum of $72,000 (or $80,000 if age 50+ with catch-up contributions). A SEP IRA requires significantly higher net business income (over $360,000) to max out the $72,000 limit because it lacks the employee salary-deferral bucket.
  • You want Roth flexibility: Solo 401(k) plans allow Roth (after-tax) employee contributions.
  • You need liquidity: Many Solo 401(k) plans permit participant loans (up to 50% of your balance or $50,000), which aren't allowed in a SEP IRA.
• SEP IRA Wins Only If:
  • You want ultra-minimal paperwork and absolute simplicity. SEP IRAs are exceptionally easy to set up and do not require filing annual reports (like Form 5500-EZ) once your account balance exceeds $250,000.

Top Providers

• For Traditional/Standard Investing (Stocks, ETFs, Mutual Funds):
  • Fidelity Investments: Widely rated as the best overall provider for self-employed retirement accounts due to $0 trade commissions, no account setup fees, and robust digital tools. (Note: Fidelity offers a strong Solo 401(k) and SEP IRA, though check individual features like Roth availability depending on your precise paperwork).
  • Charles Schwab / E*TRADE: Both offer excellent, low-fee Solo 401(k) and SEP IRA platforms with 0 setup costs and full access to standard exchange-traded assets.
• For Alternative Assets (Real Estate, Crypto, Checkbook Control):
  • My Solo 401(k) Financial or IRA Financial: If you want to use your retirement funds to buy real estate, physical crypto, or private placements without triggering tax penalties or Unrelated Debt-Financed Income (UDFI) tax complications on leveraged real estate, a specialized provider is necessary. They assist with customized plan documents and open-custody setups at major brokerages.

If you can share your approximate net self-employment income and whether you plan to invest in standard stocks/funds vs. alternative assets like real estate , I can help narrow down the ideal provider for your situation.

For most self-employed people with no employees, a solo 401(k) is usually the better choice in 2026 — but a SEP IRA still wins for simplicity. The “best” provider depends on whether you value maximum contributions, Roth flexibility, or zero administration.

Quick recommendation

Best overall for most solo business owners:
➡️ Solo 401(k) at Fidelity or Schwab

• Lets you contribute as both employee and employer.
• Usually allows much larger contributions at moderate income levels.
• Often offers a Roth option (depending on plan).
• Good low-cost investment choices.

Best if you want the easiest setup:
➡️ SEP IRA at Fidelity, Schwab, or Vanguard

• Very simple administration.
• No employee deferral paperwork.
• Good if you have irregular income or want a “set it and forget it” plan.

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Solo 401(k) vs SEP IRA (2026)

Why the solo 401(k) often wins

The key advantage is the employee deferral. A SEP IRA only lets you contribute as the employer (generally up to 25% of compensation, capped at the annual limit). A solo 401(k) lets you add the employee contribution first, then add employer profit-sharing.

Example:

• Net self-employment income: ~$100,000
• SEP IRA: roughly $25,000 contribution limit
• Solo 401(k): potentially the $24,500 employee deferral + employer contribution (subject to calculation rules)

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Provider recommendations

1. Fidelity Investments — best general choice

Good fit if you want:

• Low-cost index funds and ETFs
• A mainstream custodian
• Roth solo 401(k) availability
• Strong customer service and tools

My default pick for many freelancers.

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2. Charles Schwab Corporation — excellent alternative

Good fit if you:

• Already use Schwab
• Want broad investment choices
• Prefer Schwab’s ecosystem

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3. Vanguard — great investments, less convenient for some

Good fit if you:

• Want Vanguard funds specifically
• Prefer a simple index-investing approach

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When I would choose a SEP IRA instead

A SEP IRA makes more sense if:

• You want almost no administration.
• You have very low or unpredictable income.
• You have employees and want a uniform employer contribution structure.
• You do not care about Roth contributions or maximizing contributions.

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My practical ranking for 2026

1. Solo 401(k) at Fidelity — best balance of flexibility, cost, and features
2. Solo 401(k) at Schwab — excellent if you already use Schwab
3. SEP IRA at Fidelity/Vanguard/Schwab — best simplicity choice
4. Specialized solo 401(k) providers — only if you need unusual features (mega backdoor Roth, self-directed investing, etc.)

If you tell me:

1. your approximate net self-employment income,
2. whether you have employees,
3. your age, and
4. whether you want Roth contributions,

I can tell you which one likely produces the largest tax-advantaged contribution for your situation.

For a self-employed individual or solopreneur with no employees, a Solo 401(k) generally makes the most sense if you want to maximize your tax deductions, make Roth contributions, or take out loans. However, if your primary goal is absolute simplicity with no annual administrative burden, a SEP IRA is the better option.

Both accounts allow a combined contribution of up to $72,000 for the 2026 tax year. However, getting to that limit differs significantly:

• Solo 401(k): Allows you to contribute as both an employee (up to $24,500 in 2026, plus up to $8,000 in catch-up contributions if you are 50+) and an employer (up to 25% of your net adjusted earned income).
• SEP IRA: Functions as purely employer-funded, limiting your total contribution to 25% of your net earnings from self-employment.

Top Providers for This Year

To determine which provider to use, consider whether you need standard index funds or want self-directed options for alternative assets like real estate.

Best for Standard Investments & Low Fees (Index Funds/ETFs):

• Fidelity Investments: Excellent overall for both SEP IRAs and Solo 401(k)s . They offer robust, zero-fee index funds and stellar 24/7 customer support.
• Charles Schwab: Outstanding for solopreneurs who want easy online setup, no-commission ETF investing, and highly detailed administrative guides.

Best for "Mega-Backdoor" Roth & Automated Administration:

• Betterment: Combines the ease of a robo-advisor with both SEP and Roth Solo 401(k) account options. It’s highly streamlined for hands-off investors.
• ForUsAll: A great tech-forward choice if you want to automate 401(k) compliance and bypass the paperwork headache typically associated with 401(k)s.

Best for Alternative Assets (Self-Directed):

• American IRA: Ideal if you want to use your retirement funds for real estate, private businesses, or precious metals.

To give you the most accurate recommendation, tell me:

• What is your approximate net self-employment income?
• Do you plan to hire W-2 employees in the next few years?
• Are you interested in making Roth (after-tax) contributions?

For most self-employed people with no employees (other than possibly a spouse), a solo 401(k) is the stronger choice in 2026. A SEP IRA still makes sense if you want maximum simplicity or have irregular income and don't need the extra features.

Here's the practical comparison:

Why the solo 401(k) usually wins

A solo 401(k) allows you to contribute both:

• employee salary deferrals, and
• employer profit-sharing contributions.

That means many freelancers and sole proprietors can contribute substantially more than they could to a SEP IRA at the same income level, particularly when earnings are moderate rather than extremely high. Solo 401(k)s also commonly offer Roth contributions, while SEP IRAs are much more limited in flexibility.

When a SEP IRA is the better answer

A SEP IRA can be attractive if:

• you want almost no paperwork,
• you only make employer contributions,
• your income is high enough that the contribution difference largely disappears,
• you don't care about Roth or loan features.

Opening and maintaining one is generally simpler than administering a solo 401(k).

Providers I'd consider

Solo 401(k):

• Fidelity Investments — Excellent low-cost investing, broad fund selection, strong customer service. A great fit for most investors.
• Charles Schwab — Another strong mainstream choice with extensive investment options.
• E*TRADE — Particularly attractive if you want broader trading features.

If you're specifically interested in advanced strategies like after-tax contributions and a mega backdoor Roth, many mainstream brokerage plans still don't support every feature. In that case, specialty providers (often with annual fees) can be worthwhile.

SEP IRA:

All three offer low-cost index funds and straightforward SEP IRA administration.

My general recommendation

If you're:

• a sole proprietor, freelancer, consultant, or independent contractor,
• have no full-time employees,
• and expect to save aggressively for retirement,

then a solo 401(k) at Fidelity or Schwab is usually the most compelling combination of flexibility, contribution potential, and low ongoing costs.

If your goal is simply to make deductible retirement contributions with minimal setup and maintenance, a SEP IRA remains an excellent, uncomplicated option.

If you can share:

• your approximate net self-employment income,
• whether you're a sole proprietor, single-member LLC, or S corporation,
• your age, and
• whether you have any employees,

I can estimate your maximum contribution under each plan and identify which one would likely save you more in taxes.

For self-employed individuals with no employees (other than a spouse), a Solo 401(k) generally makes the most sense in 2026 due to higher contribution limits and greater flexibility. However, a SEP IRA is superior if simplicity, ease of setup, or the ability to contribute late (up to the tax filing deadline) is prioritized.

Quick Comparison for 2026

• Solo 401(k): Best for maximizing savings. Allows up to $70,000+ in 2025/2026 (via employee deferral + employer contribution), Roth options, and optional loans.
• SEP IRA: Best for simplicity. Quick setup, no annual IRS filing until assets exceed $250k, but only allows employer contributions (up to 25% of compensation).

Top Providers for 2026

Best Solo 401(k) Providers

1. Fidelity Investments: Top choice for low-cost, no-fee, broad investment options ($0 commission online U.S. stock/ETF trades).
2. Vanguard: Strong reputation, excellent for low-cost index funds.
3. Schwab: Highly competitive, no fees for opening or maintaining.
4. Specialized Providers (e.g., MySolo401k.net): Best if you need to hold alternative assets (real estate) or need complex plan documents for a "Mega Backdoor" Roth.

Best SEP IRA Providers

1. Fidelity: No setup or annual fees, easy to set up.
2. Schwab: Offers simple, cost-effective options with broad investment choices.
3. Betterment: Good for automated, robo-advisor-driven investing.

Key Decision Factors

• Contribution Strategy: If you want to contribute both as an employee ($23,500 for 2025/2026) and as an employer (25% of net profit) to hit high limits, pick a Solo 401(k).
• If you have employees: You must use a SEP IRA (or SIMPLE IRA), as you cannot have a Solo 401(k) if you have employees.
• Timeline: SEP IRAs can be opened up to the tax deadline (plus extensions) to be valid for the previous year. Solo 401(k)s often must be established by December 31.
• Roth Component: If you want tax-free growth (Roth) and your income is too high to contribute to a personal Roth IRA, a Solo 401(k) allows for Roth contributions.

To help you choose, are you looking to maximize contributions over $50k , or is simplicity and low administrative work more important to you? Also, do you have any employees (excluding a spouse)?

For most self-employed people with no employees (other than a spouse), a solo 401(k) is the better choice this year. A SEP IRA still has a place, but it's usually best when simplicity matters more than maximizing flexibility or contributions.

Here's how I would think about it:

My general recommendation

For a typical freelancer, consultant, physician, attorney, or other solo business owner, I'd lean toward a solo 401(k) because it offers:

• higher potential contributions at many income levels,
• Roth contribution options,
• better flexibility,
• potential loan provisions,
• and it doesn't interfere with common backdoor Roth IRA planning the way SEP IRAs can.

The extra paperwork is modest for most people, especially before the account reaches the filing threshold for additional IRS reporting.

Provider recommendations

If you want a straightforward, low-cost experience:

1. Fidelity — My default recommendation for most people. Excellent index funds with no account fees for many users, good customer service, and broad investment choices. Fidelity's solo 401(k) supports both traditional and Roth employee contributions.

2. Charles Schwab — Excellent brokerage platform and customer support. A strong choice if you already invest there.

3. E*TRADE — Particularly attractive if features like participant loans are important, depending on the plan design.

4. Vanguard — Outstanding investment funds, although its solo 401(k) offering has historically been less feature-rich than some competitors.

For a SEP IRA, virtually any major brokerage—including Fidelity, Charles Schwab, and Vanguard—offers a simple, low-cost option.

When a SEP IRA still makes the most sense

I'd favor a SEP IRA if:

• your business income is very high and you're already close to the maximum contribution anyway,
• you value absolute simplicity,
• or you expect to hire employees soon and don't want a solo 401(k).

If you can share:

• your age,
• your estimated 2026 self-employment income,
• your business structure (sole proprietor, single-member LLC, S corporation, etc.),
• and whether you have any employees,

I can estimate your maximum contribution under each plan and recommend the provider that best fits your situation.

For a self-employed individual with no full-time employees (besides a spouse), a Solo 401(k) generally makes the most sense in 2026 due to higher contribution potential, Roth options, and the ability to take loans. If simplicity and low administrative burden are top priorities, a SEP IRA is often preferred, particularly for those with employees or those who need to establish a plan quickly.

Top Providers for 2026:

• Fidelity Investments: Top pick for Solo 401(k) due to $0 commission trades, a broad selection of funds, and no setup fees.
• Vanguard: Strong, low-cost option for both SEP IRAs and Solo 401(k)s.
• Charles Schwab: Similar to Fidelity, offering free online trading for both account types.

At-a-Glance Comparison for 2026

• Solo 401(k): Ideal for high earners looking to maximize savings. Can contribute as both employee and employer, with higher 2026 limits (up to $72,000, or $79,500 if 50+ including catch-up).
• SEP IRA: Best for simplicity and ease of setup. Contributions are entirely employer-funded (up to 25% of net earnings).
• Roth Option: A Solo 401(k) typically offers better Roth (after-tax) options, allowing for "Mega Backdoor" contributions.
• Loans: Only allowed in a Solo 401(k), not a SEP IRA.

Which to Choose?

• Choose Solo 401(k) if: You are a solopreneur, want higher limits, desire a Roth option, or need to take a loan from the account.
• Choose SEP IRA if: You have employees (cannot use a Solo 401(k)), want zero annual filing, or need to set up a plan late in the year.

To help you narrow this down further, let me know:

• Do you have any employees other than a spouse?
• Are you looking to maximize your contributions for 2026, or is simplicity more important?
• Are you hoping to make Roth (after-tax) contributions?

For most self-employed people with no employees, a Solo 401(k) is usually the better choice in 2026, but a SEP IRA can still make sense in specific situations. The right answer depends mostly on your income level, whether you want Roth contributions, and how much you want to save.

Quick recommendation

Pick a Solo 401(k) if:

• You have no common-law employees (other than possibly a spouse).
• You want to maximize retirement contributions.
• You want the option of Roth contributions.
• Your business income is moderate/high enough that employee deferrals matter.
• You may want advanced features later (such as loans or after-tax contribution strategies, depending on plan design/provider).

Pick a SEP IRA if:

• You want the simplest possible setup.
• You have fluctuating income and mainly want employer contributions.
• You have employees and want a straightforward plan (though the contribution obligation for employees can make SEPs expensive).
• You do not need Roth contributions or employee deferrals.

Why Solo 401(k) often wins

A Solo 401(k) lets you contribute in two roles: employee + employer. You can make employee elective deferrals (up to the annual 401(k) deferral limit) plus employer profit-sharing contributions.

A SEP IRA only allows employer contributions; it does not allow employee salary deferrals or catch-up contributions.

For 2026:

• 401(k) employee deferral limit: $24,500 (plus catch-up rules if eligible).
• SEP IRA maximum contribution: $72,000 or 25% of compensation, whichever is lower.
• Solo 401(k) overall annual additions can also reach the defined contribution plan limit (generally $72,000 in 2026, before applicable catch-ups).

The practical difference: a person earning, for example, $100k–$200k of self-employment income can often put more away with a Solo 401(k) because the employee contribution fills the gap before profit-sharing is calculated.

Provider recommendations

Best overall for most DIY investors

Fidelity Investments Solo 401(k)

• Excellent low-cost index fund lineup.
• Strong customer service reputation.
• Good if you already use Fidelity for taxable accounts or IRAs.
• Good fit for a simple, low-maintenance retirement setup.

Best for Vanguard-style investors

Vanguard Solo 401(k)

• Excellent low-cost funds.
• Appeals to buy-and-hold index investors.
• Less attractive if you want a polished small-business retirement interface.

Best if you already use Schwab

Charles Schwab Corporation Individual 401(k)

• Broad investment choices.
• Convenient if your other accounts are already there.

When to consider a third-party Solo 401(k) provider

If you need features such as:

• mega backdoor Roth capability,
• custom plan documents,
• participant loans,
• more advanced contribution strategies,

a specialized provider may be worth paying for.

My default ranking for 2026

1. Solo 401(k) at Fidelity — best combination of simplicity, cost, and flexibility for most solo business owners.
2. Solo 401(k) at Vanguard or Schwab — excellent alternatives depending on where your accounts already live.
3. SEP IRA — choose this mainly for simplicity, not maximum savings.

If you share:

1. your approximate net self-employment income,
2. whether you have employees,
3. your age, and
4. whether you want Roth contributions,

I can tell you which one is likely to produce the largest tax benefit for your situation.