Why retirement saving looks different without an employer
An employer-sponsored 401(k) bundles a few things together automatically: a plan already exists, payroll deducts your contribution before you see the money, and an employer match — free money — often shows up on top. Self-employment removes all three defaults at once. You have to choose a plan, fund it yourself out of after-the-fact profit rather than a fixed paycheck, and there's no employer sitting on the other side of a match.
That doesn't mean self-employed retirement accounts are worse — several of them actually allow larger contributions than a typical employer 401(k), precisely because you're wearing both the "employer" and "employee" hats. It does mean the decisions that a payroll department would otherwise handle — which account, how much, and when — fall entirely on you.
Tip Treat a retirement contribution as a savings-rate goal rather than an afterthought. The Savings Rate Calculator shows what percentage of income a given contribution represents, which can be a more useful planning number than the dollar amount alone.
Comparing the three main account types
Each account trades off simplicity, contribution potential, and who else it needs to cover:
| Account | Generally best for | How contributions work |
|---|---|---|
| SEP-IRA | Solo freelancers who want the simplest possible setup | A single employer-style contribution, calculated as a percentage of net self-employment income |
| Solo 401(k) | Solo owners with no full-time employees (other than a spouse) who want to maximize contributions | An "employee" deferral portion plus an "employer" profit-sharing portion, which combine for a higher total |
| SIMPLE IRA | Owners with a few employees, or anyone who wants low-cost, low-maintenance administration | An employee deferral plus a required employer match or fixed employer contribution |
Key Takeaway The account with the best name recognition isn't always the one that lets you save the most. At moderate profit levels, a Solo 401(k) usually allows a meaningfully larger total contribution than a SEP-IRA for the same net income, because it counts both an "employee" and an "employer" contribution.
Step-by-step: choosing and opening an account
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Estimate this year's net self-employment profit.
Contribution limits for all three account types are based on net profit, not gross revenue — so a rough estimate of this year's profit is the starting point for every decision that follows.
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Match your situation to an account type.
No employees and want maximum contribution flexibility generally points toward a Solo 401(k); wanting the simplest possible setup points toward a SEP-IRA; having a few employees to cover as well points toward a SIMPLE IRA.
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Open the account before the relevant deadline.
A Solo 401(k) generally must be established by December 31 of the tax year, even though contributions can often be made up until the tax filing deadline. SEP-IRA and SIMPLE IRA have their own setup and contribution deadlines tied to your filing deadline — confirm the current rules before assuming you have until tax time.
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Fund it in a way that fits variable income.
Since profit fluctuates, many self-employed people fund these accounts after a strong quarter or with a year-end contribution once actual annual profit is known, rather than committing to a fixed monthly transfer.
How 2026 contribution limits work
Contribution limits are set by the IRS and typically adjust each year for inflation. Here's how the 2026 limits break down for each account type:
| Account | 2026 limit | Note |
|---|---|---|
| SEP-IRA | Up to 25% of net self-employment compensation, capped at $72,000 | The effective percentage of net profit is lower than 25% once the self-employed compensation calculation is applied |
| Solo 401(k) | $24,500 employee deferral (+$8,000 catch-up if eligible) plus employer profit-sharing up to 25% of compensation | The two components combine, up to an overall compensation limit of $360,000 |
| SIMPLE IRA | $17,000 employee deferral | The employer side must add a matching or fixed contribution on top |
| Traditional / Roth IRA | $7,500 (+$1,000 catch-up) | Shown for context — can often be used alongside the accounts above, subject to separate income rules |
These are 2026 IRS limits and change most years with inflation adjustments. Always confirm the current year's numbers at irs.gov before contributing — exceeding a limit can create tax complications that take real effort to unwind.
Common mistakes
- Assuming a "solo" 401(k) is available with full-time employees — most employees (other than a spouse or business partner) make you ineligible for the solo version.
- Confusing gross revenue with the "compensation" base used for contribution limits — the real base is net profit after deductions, not top-line revenue.
- Missing a Solo 401(k)'s account-opening deadline, which is often earlier than the contribution deadline, by waiting until tax time to set one up.
- Treating the contribution limit as a target rather than a ceiling — contributing what cash flow actually allows, even well below the max, still builds real progress.
Retirement account setup checklist
Checkbox state isn't saved between visits (this is a static, no-account site) — treat this as a print/screenshot-friendly checklist, not a saved tracker.
Frequently asked questions
Can I have more than one of these accounts at the same time?
Generally, you can't fully fund both a SEP-IRA and a Solo 401(k) for the same self-employment income in the same year in most situations, and combining a SIMPLE IRA with either is also restricted. This is exactly the kind of interaction worth confirming with a tax professional before setting anything up.
Do I need an employee to open a SIMPLE IRA?
No — sole proprietors with no employees can open one, though it's more commonly used once a business has a small team, since a SEP-IRA or Solo 401(k) is usually simpler with no employees.
What happens if I contribute more than the limit?
Excess contributions can trigger a 6% excise tax for each year they remain in the account. Excess amounts generally need to be withdrawn, along with any earnings, by the tax filing deadline to avoid this.
Can I still contribute to a Traditional or Roth IRA on top of these?
Often yes, subject to separate income-based rules for deductibility (Traditional) or eligibility (Roth). Those limits and rules are independent of whichever self-employed account you also use.
Do I have to contribute the same amount every year?
No — a defining feature of these accounts is that contributions can vary, or be skipped entirely, from year to year based on actual profit, unlike a fixed payroll deduction.