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 most self-employed people with no employees (other than possibly a spouse), a solo 401(k) is usually the better choice in 2026 — but a SEP IRA can still be the right answer in some situations. The “best” provider is usually the one with low fees, good index funds/ETFs, and a plan document that fits your needs.

Quick recommendation

Why a solo 401(k) often wins

A solo 401(k) lets you contribute in two roles:

1. Employee contribution — up to $24,500 in 2026 (plus catch-up if eligible).
2. Employer contribution — generally up to 25% of compensation (with self-employed calculations differing).

The combined 2026 limit is generally up to $72,000 before catch-up contributions.

A SEP IRA only allows the employer contribution side. You cannot defer part of your income as an employee, which can make it much less powerful for someone with, for example, $50k–$150k of self-employment profit. SEP contributions are generally limited to the lesser of 25% of compensation or $72,000 in 2026.

Example

Suppose you have $80,000 of self-employment profit:

• SEP IRA: roughly limited to an employer-style contribution (often around 20% of adjusted net self-employment income).
• Solo 401(k): you may be able to make a much larger contribution because you can use the employee deferral plus employer contribution.

Providers I would consider in 2026

Best overall for most people: Fidelity Investments solo 401(k)

• No account fees for many standard accounts
• Strong selection of low-cost index funds and ETFs
• Good customer service infrastructure
• Good fit if you want traditional + Roth options and a mainstream brokerage

Fidelity### Best for low-cost index investors: Vanguard SEP IRA or solo 401(k)

• Excellent low-cost mutual funds
• Strong choice if you already use Vanguard funds
• SEP IRA is straightforward and inexpensive

Vanguard### Best if you want a highly flexible solo 401(k): E*TRADE or Charles Schwab

• Often attractive for people who want broader brokerage features
• Good if you like managing your own ETF portfolio

My default choice

For a one-person business in 2026:

Choose a solo 401(k) at Fidelity if:

• you have no employees,
• you want to save aggressively,
• you may want Roth contributions,
• you want flexibility.

Choose a SEP IRA at Vanguard if:

• you want simplicity,
• you contribute irregularly,
• you do not need employee deferrals,
• you prefer a very simple retirement account.

A few details could change the answer:

1. Is your business a sole proprietorship, LLC, or S corporation?
2. About how much is your annual net profit/pay from the business?
3. Are you under or over age 50?
4. Do you have any employees besides a spouse?

A Solo 401(k) generally makes the most sense for solo business owners who want to maximize their annual savings, as it allows both employee and employer contributions, Roth options, and higher caps for those over 50, while top brokers like Fidelity Investments or Charles Schwab offer robust, low-fee plans for both account types.

Solo 401(k) vs. SEP IRA Comparison

Which Account Type to Choose

• Choose a Solo 401(k) if: You want to save money faster with lower net earnings via employee elective deferrals, want access to Roth savings without income restrictions, or might need participant loans.
• Choose a SEP IRA if: You want absolute minimal paperwork, have lower administrative tolerance, and do not care about employee-level deferrals or catch-up contributions.

Top Providers to Consider

• Fidelity Investments: Excellent for SEP IRAs with zero account fees and a wide choice of low-cost index funds. (Note: Fidelity offers standard SEP IRAs and traditional/Roth small-business options, but check their specific current offerings for individual 401k plans if you need checkbook control).
• Charles Schwab: Offers robust, commission-free trading and straightforward setup for both SEP IRAs and individual 401(k) plans with strong customer support.
• Vanguard: Known for ultra-low expense ratio funds, ideal if you plan to stick to basic, passive index investing for your retirement accounts.

If you share your approximate net self-employment income and whether you prefer Roth or pre-tax savings , I can help you calculate your precise contribution potential for this year.

For most self-employed people who have no employees other than a spouse, I’d choose a solo 401(k) over a SEP IRA in 2026—especially if your goal is to maximize retirement savings or get more flexibility.

My default pick: Solo 401(k) at Fidelity

Fidelity Investments is my first choice for a straightforward solo 401(k). Fidelity says its self-employed 401(k) has no account fees or minimums, and it supports both traditional and Roth contributions.

The big advantage is that you can contribute in two capacities:

• Employee: In 2026, you can generally defer up to $24,500 of compensation, plus an age-50+ catch-up of $8,000; a special higher catch-up applies at ages 60–63.
• Employer: Your business can generally add up to 25% of eligible compensation (with special calculations for self-employed people).
• Combined contributions can reach $72,000 in 2026, before applicable catch-up contributions.

That employee contribution is what makes the solo 401(k) particularly powerful for someone with moderate self-employment income. For example, a person earning $80,000 doesn't have to earn $288,000+ to get close to the annual maximum; they can use the employee-deferral component plus the employer contribution.

When I'd choose a SEP IRA instead

A SEP IRA is compelling if you value simplicity more than contribution flexibility.

For 2026, the SEP limit is the lesser of $72,000 or 25% of eligible compensation. But unlike a solo 401(k), the SEP is essentially an employer-contribution-only vehicle—you don't get the separate employee salary-deferral bucket.

A SEP can therefore make sense if:

• Your income is high enough that the 25%-of-compensation formula already gives you everything you want.
• You have highly variable income and want to make a discretionary contribution each year.
• You don't want the extra 401(k) administration.
• You expect to add employees. A SEP is easier to extend to eligible employees, although you generally have to contribute the same percentage of compensation for eligible employees as you contribute for yourself.

Provider comparison

| Fidelity | Schwab | Vanguard --- | --- | --- | --- Solo 401(k) | Excellent | Excellent | Less compelling SEP IRA | Excellent | Excellent | Good Account fees | $0 | $0 | Generally higher/less simple Roth solo 401(k) | Yes | Plan-dependent | — Ease of use | Very good | Very good | Good My pick | 🥇 | 🥈 | —

Fidelity currently lists $0 account fees and no minimums for both its self-employed 401(k) and SEP IRA. Fidelity Schwab likewise lists $0 opening/maintenance fees for its Individual 401(k) and SEP IRA.

One important wrinkle: your existing workplace 401(k)

If you're self-employed and also have a W-2 job with a 401(k), the answer can change significantly. The employee-deferral limit is generally shared across your 401(k) plans, so you can't simply put the full employee limit into both.

Also, if you're considering backdoor Roth IRA contributions, a SEP IRA can create a nasty pro-rata-tax complication because SEP IRAs are treated as traditional IRAs for that purpose. A solo 401(k) can be much cleaner.

Bottom line

I'd generally do this:

Solo 401(k) → Fidelity if you're a one-person business (or spouse-only), want to maximize contributions, and value Roth/401(k) flexibility. SEP IRA → Fidelity or Schwab if you prioritize simplicity, have high enough income that the SEP formula meets your savings target, or expect to have eligible employees. If you give me (1) your approximate 2026 self-employment profit, (2) whether you're under/over 50, (3) sole proprietor vs. S-corp/LLC, and (4) whether you have a W-2 job/401(k), I can calculate the actual 2026 contribution you could make under each and tell you which wins dollar-for-dollar.

Choosing between a SEP IRA and a Solo 401(k) (Individual 401(k)) depends heavily on your income level, whether you want the option to make catch-up/employee contributions, and if you plan to hire employees down the road.

Part 1: Which Account Type Makes the Most Sense?

• Solo 401(k): Best overall if you have no employees (other than a spouse).
  • Higher Contribution Limits: You contribute in two ways—as the employee (up to $23,500 or $23,000 depending on inflation adjustments, plus a $7,500 catch-up if you are 50+) and as the employer (up to 25% of net earnings from self-employment). Total combined contributions can be significantly higher at lower income levels than a SEP IRA.
  • Roth Option: Most major Solo 401(k) providers now support Roth (after-tax) contributions. SEP IRAs are strictly pre-tax.
  • Loan Feature: Many Solo 401(k) plans allow you to borrow against your balance—a feature IRAs do not offer.
  • Downside: More paperwork. Once your plan assets exceed $250,000, you generally have to file IRS Form 5500-EZ annually.
• SEP IRA: Best for simplicity or if you want minimal upkeep.
  • Easy Setup & Maintenance: Extremely light administrative work, no IRS Form 5500 filing regardless of account balance.
  • Flexible Contributions: You can adjust the employer contribution percentage every year depending on cash flow (up to 25% of compensation).
  • Downside: Contribution limits are strictly employer-funded (25% of net earnings), meaning to max it out, your net self-employment income needs to be quite high. You also cannot make employee salary deferrals or Roth contributions.
  • The "Employees" Trap: If you hire W-2 employees, you must contribute the exact same percentage to their SEP IRAs as you do for yourself, which can become very expensive.

Part 2: Top Providers This Year

The top traditional brokerages offer zero-fee plan setups and commission-free trading for standard funds:

1. Fidelity Investments (Best Overall for Solo 401k & SEP IRA): Highly rated by Investopedia's Best Solo 401k Companies , Fidelity offers robust, zero-fee Solo 401(k) and SEP IRA plans with broad investment choices and stellar customer service.
2. Charles Schwab (Best for Low-Cost Traditional Investing): Excellent for fee-conscious savers, featuring robust research tools, zero maintenance fees on standard self-employed retirement plans, and comprehensive ETF/mutual fund lineups.
3. E*TRADE (Best for Advanced Features & Trading): Known for a flexible platform with strong account features and an intuitive digital interface for managing individual 401(k) participant accounts.

(Note: If you want alternative assets like physical real estate or crypto inside a Solo 401k, you'd look to specialized self-directed custodians, but expect higher setup and custodial fees).

To help narrow down the exact fit, tell me:

• What is your approximate self-employment income this year?
• Do you plan to hire W-2 employees in the near future?
• Do you want the ability to make Roth (after-tax) contributions?

Choosing between a SEP IRA and a Solo 401(k) (Individual 401(k)) depends heavily on your income level, how much you want to contribute, and whether you need features like catch-up contributions, Roth options, or loans. The maximum contribution limit for both accounts is $72,000 for 2026.

SEP IRA vs. Solo 401(k)

• Solo 401(k)
  • Best for : Maximizing contributions when your net self-employment income is modest, or if you want Roth contributions, catch-up contributions, or the ability to borrow against your account.
  • How contributions work : You contribute as both the employee and the employer. You can defer up to $24,500 as an employee (plus catch-up contributions if you are 50+), plus an additional 25% of net self-employment earnings as the employer.
  • Key perks : Allows Roth contributions, participant loans (up to $50,000 or 50% of the balance), and higher savings potential at lower income thresholds because of the employee salary deferral piece.
  • Downsides : Must be established by December 31 of the tax year (unlike a SEP IRA, which can be set up as late as your tax filing deadline), and requires filing an IRS Form 5500-EZ once your total plan assets exceed $250,000.
• SEP IRA
  • Best for : Ultimate simplicity, variable or unpredictable income, or if you are setting up your account after the calendar year ends.
  • How contributions work : Contributions are strictly employer-funded (up to roughly 20% of net adjusted self-employment earnings).
  • Key perks : Extremely easy to maintain with no annual IRS filings, and you have until your tax-filing deadline (including extensions) to open and fund the account for the previous tax year.
  • Downsides : No employee-only salary deferral or catch-up contributions, meaning you need much higher business income to reach the $72,000 max limit.

Top Providers for This Year

For traditional, low-cost brokerages offering zero-fee setups and wide investment selections for standard SEP IRAs and Solo 401(k)s:

• Fidelity Investments : Recognized as a top overall provider for both Solo 401(k)s and SEP IRAs, featuring robust research, $0 trades on online stocks/ETFs, and strong customer support.
• Charles Schwab : Excellent for low-fee investing and a massive selection of commission-free index funds and ETFs, with reliable phone and branch support.
• E*TRADE : Offers a feature-rich Solo 401(k) and SEP IRA platform with intuitive tools tailored for self-directed investors.
• Alternative / Self-Directed (e.g., Rocket Dollar or IRA Financial) : Look into specialized self-directed providers if you plan to hold alternative assets like physical real estate, private equity, or crypto inside your retirement account.

To help me narrow down the best choice, tell me:

• What is your approximate net self-employment income this year?
• Do you want access to alternative assets (like real estate) or just standard stocks/funds?

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 if simplicity is the top priority. The right answer depends mainly on your income level, whether you want Roth contributions, and how much you want to save.

Quick recommendation

Why Solo 401(k) often wins

A Solo 401(k) lets you contribute in two roles: employee and employer. In 2026, the employee deferral limit is $24,500 (plus catch-up if eligible), and total contributions can reach $72,000 before catch-up contributions, subject to compensation rules.

Example:

• Net self-employment income: ~$100,000
• Solo 401(k): you may be able to make a large employee contribution plus an employer profit-sharing contribution.
• SEP IRA: you generally only get the employer contribution percentage.

A Solo 401(k) also gives you:

• Possible Roth 401(k) contributions
• Potentially better contribution flexibility in lower-income years
• More control over contribution timing

When SEP IRA is the better choice

A SEP IRA is attractive because it is extremely simple:

• No employee salary deferrals
• Minimal administration
• Easy to open and maintain

For 2026, SEP IRA contributions can be up to 25% of compensation, with a maximum contribution of $72,000.

A SEP IRA may be ideal for:

• A freelancer who wants to make one employer contribution each year
• Someone who does not need Roth contributions
• Someone who values simplicity over contribution flexibility

Provider recommendations for 2026

Best all-around: Fidelity Investments

Why:

• No account fees for many small-business retirement plans
• Strong low-cost fund lineup
• Good customer service reputation
• Offers both SEP IRA and self-employed 401(k) options

Best for Vanguard fund investors: Vanguard

Why:

• Excellent low-cost index funds
• Good fit if you already use Vanguard mutual funds/ETFs
• Straightforward retirement investing

Best for active traders or broader investing tools: Charles Schwab Corporation

Why:

• Strong brokerage platform
• Good investment flexibility
• Useful if your retirement account is part of a larger investing setup

My default pick

For a typical self-employed person in 2026:

Open a Solo 401(k) at Fidelity if:

• You have no employees,
• You expect meaningful self-employment income,
• You want to maximize savings or want Roth flexibility.

Choose a SEP IRA at Fidelity or Vanguard if:

• You want the easiest possible plan,
• You will contribute only occasionally,
• You do not need employee-style deferrals.

If you share your age, approximate net self-employment income, whether you have employees, and whether you want Roth contributions, I can compare the likely contribution amounts for your situation.

When deciding between a SEP IRA and a Solo 401(k) (Individual 401(k)), the right choice usually comes down to your income level, whether you want Roth options, and if you plan to hire employees in the future. For the current tax year, the maximum contribution limit for a Solo 401(k) and a SEP IRA is $72,000 (plus additional catch-up contributions if you are 50 or older).

Account Comparison: SEP IRA vs. Solo 401(k)

• Solo 401(k)
  • Contributions: You contribute as both the employee (up to $24,500 for 2026) and the employer (up to 25% of net earnings from self-employment), allowing you to hit max limits at lower income thresholds.
  • Catch-up Contributions: Generous catch-up rules apply if you are age 50+ ($8,000 $ 8 comma 000$8,0 0 0 standard, or higher for ages 60–63).
  • Roth Options: Allows both pre-tax and Roth (after-tax) employee contributions.
  • Features: Often allows participant loans (borrowing up to $50,000 or 50% of the balance).
  • Downside: Requires an owner-only business (no W-2 employees other than a spouse). Requires filing IRS Form 5500-EZ once total plan assets cross $250,000.
• SEP IRA
  • Contributions: Employer-only contributions capped at 20% of net self-employment earnings (for sole proprietors) or 25% of compensation. To hit the $72,000 max, your net business income must exceed roughly $360,000.
  • Catch-up Contributions: Not permitted (no employee salary deferrals).
  • Roth Options: Not available (strictly pre-tax contributions).
  • Features: Extremely easy to set up and maintain with zero Form 5500 filing requirements.
  • Downside: Allows you to cover and contribute for eligible W-2 employees if you expand your business, which can become expensive.

Verdict: If you are an owner-only business and want maximum flexibility, Roth options, or the ability to stash away large amounts of cash at lower revenue levels, the Solo 401(k) wins. Choose a SEP IRA only if you want absolute administrative simplicity and do not care about Roth accounts or employee-style deferrals.

Top Providers for This Year

• Fidelity Investments (Best Overall for Traditional Assets)
  • Offers robust self-employed 401(k) and SEP IRA plans with $0 commission online trades and $0 annual maintenance fees . Backed by strong 24/7 customer service and physical branches.
• Charles Schwab (Best for Low Fees & Broad Traditional Choices)
  • Excellent, low-cost platform for both Solo 401(k) and SEP IRAs with no advisory or hidden platform fees on basic self-directed investing.
• E*TRADE (Best for Account and Trading Features)
  • Highly competitive, user-friendly digital tools, robust educational resources, and solid administration-fee-free structures for Solo 401(k) plans.
• Rocket Dollar (Best for Alternative Investments)
  • Ideal if you want your Solo 401(k) or SEP to hold alternative assets like real estate, private equity, or crypto . Note that they charge a setup fee and monthly subscription costs.

To help narrow down the best choice for you, please share:

• Your estimated net self-employment income for this year
• Whether you want Roth (after-tax) contributions or just pre-tax deductions
• If you plan to hire employees in the near future

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

My pick: Fidelity Solo 401(k)

The big advantage is that a solo 401(k) lets you contribute in two capacities:

• Employee: up to $24,500 in 2026, plus catch-up contributions if eligible.
• Employer: generally up to 25% of compensation for an incorporated business, with special calculations for self-employed individuals.
• Combined 2026 limit is $72,000, excluding catch-up contributions.
• If you're 50+, the regular catch-up is $8,000; if you turn 60–63 during 2026, it's $11,250.
• You can potentially make the employee contribution Roth, giving you a much more valuable tax-planning option than a SEP IRA.

That's particularly powerful when your business income isn't huge. For example, Fidelity illustrates a self-employed person with $100,000 of compensation potentially putting away about $49,500 in 2026 through employee + employer contributions.

When I'd choose a SEP IRA instead

A SEP IRA is attractive if your priority is simplicity rather than maximum flexibility.

It's especially reasonable if:

• Your income is highly variable and you want to decide how much to contribute after the year is mostly over.
• You don't care about Roth contributions.
• You have employees. A solo 401(k) generally isn't available once you have employees other than your spouse, whereas a SEP can cover eligible employees—but you generally have to contribute the same percentage of compensation for eligible employees as you do for yourself.
• You want minimal administration. Fidelity describes its SEP as having no IRS filing/reporting requirement and employer-only contributions.

The 2026 SEP contribution ceiling is $72,000, subject to the applicable compensation and percentage rules.

Why Fidelity over Schwab?

I'd lean Fidelity for a solo 401(k), mainly because it offers:

• Traditional and Roth solo 401(k) contributions.
• No account fees or minimums.
• Broad stock, ETF, mutual-fund and bond choices.
• A straightforward online experience.

Schwab is also inexpensive—their Individual 401(k) currently has $0 opening/maintenance fees and no account minimum—so it's a perfectly reasonable choice if you already have your investments there.

One important wrinkle

If you also have a W-2 job with a 401(k), the $24,500 employee-deferral limit is shared across your 401(k)s. You don't get a fresh $24,500 just because you also open a solo 401(k). The employer/profit-sharing side is a separate calculation.

Bottom line:
Solo 401(k) + Fidelity is my default for a one-person business in 2026. I'd pick SEP IRA + Fidelity primarily when simplicity or having employees makes the SEP structure more attractive.

If you give me your approximate 2026 net self-employment income, age, business structure (sole prop/LLC/S-corp), whether you have a W-2 job, and whether you want Roth contributions, I can calculate the maximum 2026 contribution under each option and show which one wins in dollars.

For 2026, I’d generally favor a Solo 401(k) over a SEP IRA for a self-employed person who has no employees other than a spouse. The main exception is if you prioritize extreme simplicity or expect to add employees soon.

Why the Solo 401(k) usually wins

The important distinction is how you reach the $72,000 ceiling. A Solo 401(k) lets you contribute as both employee and employer. In 2026 you can defer up to $24,500 as the employee, then potentially add an employer contribution.

A SEP, by contrast, doesn't permit employee salary deferrals or catch-up contributions. Its contribution is generally limited to 25% of compensation, subject to the $72,000 2026 cap.

Example: If your self-employment income is $100,000, a Solo 401(k) can potentially let you put substantially more away than a SEP because you get the $24,500 employee deferral plus the employer contribution. This is especially valuable for moderate-income solopreneurs.

My provider pick: Fidelity

For a straightforward, low-cost Solo 401(k), Fidelity would be my default choice in 2026.

Fidelity's Self-Employed 401(k):

• has no account fees or minimums;
• allows traditional/pre-tax contributions;
• now offers a Roth option;
• supports the full $72,000 2026 contribution limit, before catch-ups;
• gives you access to Fidelity's broad investment lineup.

I'd choose Schwab instead if you already have most of your investments there and value keeping everything together. Schwab also has $0 online commissions for listed stocks and ETFs.

When I'd choose a SEP instead

I'd lean SEP IRA if:

• you want the simplest possible administration;
• your income is high enough that you're already able to contribute close to the $72,000 limit anyway;
• you're likely to have employees and don't want a Solo 401(k) that will need to be converted;
• you don't care about Roth employee contributions or 401(k) features.

The IRS specifically describes SEPs as having relatively low startup/operating costs and simple establishment procedures.

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 for someone who is 60–63, the enhanced catch-up is $11,250. SEP IRAs don't offer catch-ups.

Also, if you have a separate W-2 job with a 401(k), your $24,500 employee-deferral limit is shared across your 401(k) plans—you don't get $24,500 at the day job plus another $24,500 in the Solo 401(k).

Bottom line: For a typical one-person business in 2026, I'd pick Fidelity Solo 401(k). I'd pick Fidelity SEP IRA mainly for maximum simplicity or when the employee-contribution feature of the Solo 401(k) doesn't add much value.

If you give me your approximate self-employment profit, age, whether you have a W-2 job/401(k), and whether you're a sole proprietor/LLC/S-corp, I can calculate which one would actually let you contribute more in 2026 and estimate the tax savings.

For a self-employed individual with no employees other than a spouse , a Solo 401(k) generally makes the most sense over a SEP IRA because it allows significantly higher contribution limits at lower income levels and offers features like Roth contributions and participant loans. For 2026, the total base contribution limit for a Solo 401(k) reaches $72,000 (plus an extra catch-up contribution if you are 50 or older), enabled by acting as both employer and employee. Top-tier providers for these accounts include Fidelity Investments and Charles Schwab , both offering zero-fee setups and robust mainstream investment choices.

Watch this quick breakdown to see how a Solo 401(k) helps you maximize your self-employed tax savings compared to a SEP IRA:

1:33 Solo 401k vs SEP IRA: 💡Why Smart Business Owners ...1 year ago YouTube · My Solo 401k Financial

Solo 401(k) vs. SEP IRA: Key Differences

Choosing the Right Account Type

• Solo 401(k): Choose this if you want to contribute more money on a modest net income (since you can sock away up to $24,500 as an employee deferral plus 25% as the employer), want access to tax-free Roth savings, or value the safety net of a 401(k) loan option. The primary trade-off is minor administration: once plan assets exceed $250,000, you must file IRS Form 5500-EZ.
• SEP IRA: Choose this if you plan to hire W-2 employees down the road, prefer absolute minimum setup paperwork, or need the flexibility to decide your exact contribution amount all the way up your tax-filing deadline. Keep in mind that if you have eligible employees, a SEP forces you to contribute the exact same percentage of pay to their accounts as you do for yourself.

Top Providers This Year

• Fidelity Investments: Excellent for a Solo 401(k) or SEP IRA with zero account fees, broad access to low-cost index funds, and easy digital onboarding.
• Charles Schwab: Strong alternative matching Fidelity's $0 commission structure and providing solid administrative templates for self-employed plans.
• Betterment: Ideal if you prefer a automated, hands-off portfolio management style for a SEP IRA or simplified investing.
• Directed IRA or uDirect IRA: Best if you intend to use a Self-Directed Solo 401(k) to invest in alternative assets like real estate, crypto, or private startups.

If you share your approximate net self-employment income , whether you have employees , and if you want Roth vs. traditional tax treatment , I can help you calculate your exact maximum contribution limit.