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SEP IRA, Solo 401(k), or a simple IRA — how gig workers can build retirement savings without an employer plan.
Without an employer offering a 401(k) match, retirement savings for gig workers requires more intentional planning — but the accounts available are often more flexible and can allow much higher contribution limits than a typical employer plan. This lesson rounds out the pillar by covering the main options and how to think about choosing between them.
A W-2 job often makes retirement savings partly automatic — enrollment defaults, employer matching, and payroll deductions all nudge people toward saving without much active decision-making. None of that exists for gig work by default. The upside: self-employed retirement accounts often allow you to contribute significantly more per year than a typical employee 401(k), which can help make up for lost time if you started saving later.
| Account Type | Who It's Best For | Key Feature |
|---|---|---|
| SEP IRA (Simplified Employee Pension) | Solo gig workers wanting simplicity, or anyone who wants to contribute a large percentage of profit in good years | Very easy to set up and maintain; contribution limit is a percentage of net self-employment income, with a high annual dollar cap |
| Solo 401(k) | Self-employed people (with no employees other than a spouse) wanting to maximize contributions at lower income levels | Allows both an "employee" and "employer" contribution, often permitting higher total contributions than a SEP IRA at the same income level, plus optional Roth contributions |
| Traditional or Roth IRA | Anyone, including gig workers just starting out or contributing smaller amounts | Simple, low-maintenance, but a much lower annual contribution limit than a SEP or Solo 401(k) |
A SEP IRA lets you contribute up to a set percentage of your net self-employment income (after the deduction for half your self-employment tax), up to an annual dollar maximum that's adjusted periodically. It's popular because:
The tradeoff: contributions are pre-tax only (no Roth SEP option in most cases), and if you ever hire employees, you generally must contribute the same percentage for them too.
A Solo 401(k) (also called an individual 401(k)) is available to self-employed people with no employees other than a spouse. It allows two types of contributions:
| Contribution Type | How It Works |
|---|---|
| "Employee" contribution | A percentage of income up to an annual dollar limit — similar to a regular 401(k) employee deferral, can often be made as Roth (after-tax) or traditional (pre-tax) |
| "Employer" contribution | An additional percentage of net self-employment income, on top of the employee contribution — pre-tax only |
Because you're both the "employee" and "employer" in this structure, a Solo 401(k) frequently allows you to contribute more in total than a SEP IRA at the same income level, especially at moderate income levels — though the exact comparison depends on your specific numbers each year. It also involves slightly more setup and, once the account balance crosses a certain threshold, an annual filing requirement (Form 5500-EZ).
Even without a SEP or Solo 401(k), every gig worker has access to a regular IRA. The contribution limit is much lower than the self-employed-specific options, but it requires no special setup — most brokerages let you open one immediately. This can be a reasonable starting point for someone with modest, inconsistent gig income who wants to start building the habit without additional paperwork, or a supplement alongside a SEP or Solo 401(k) if you're maximizing contributions.
| Situation | Reasonable Starting Point |
|---|---|
| Just starting out, modest and inconsistent income | A Roth or Traditional IRA — simple, low commitment, builds the habit |
| Established gig income, want maximum simplicity | SEP IRA — easy to manage, flexible year to year |
| Established gig income, want to maximize total contributions | Solo 401(k) — typically allows higher total contributions, plus Roth flexibility |
| Very irregular income, some years much stronger than others | SEP IRA's flexibility (contribute a percentage only when there's profit) often fits better than a Solo 401(k)'s more involved administration |
1. Not saving for retirement at all because "gig income is unpredictable." Both SEP IRAs and Solo 401(k)s are designed to flex with variable income — you're not locked into a fixed contribution amount every year.
2. Waiting until income is "high enough" to start. Starting small with a Roth or Traditional IRA still builds meaningful long-term growth through compounding, even before your gig income justifies a SEP or Solo 401(k).
3. Missing the contribution deadline. Retirement account contribution deadlines for self-employed accounts often align with your tax filing deadline (including extensions) — but confirm the specific account's rules each year rather than assuming.
4. Not accounting for retirement contributions when planning quarterly taxes. Contributions to these accounts can reduce your taxable income, which affects how much you should be setting aside for estimated payments covered earlier in this pillar.
Key Takeaway: Gig workers have access to retirement accounts that often allow higher contribution limits than a typical employer 401(k) — a SEP IRA for simplicity, a Solo 401(k) to maximize contributions, or a basic IRA as a simple starting point. This completes the Gig Economy & Side Hustle Taxes pillar — you now have a full picture from what counts as gig income, through deductions and recordkeeping, to the tax and retirement planning that comes with growing self-employment income.
Generally you'd choose one or the other for your self-employment income in a given year rather than funding both simultaneously for the same business. You can, however, contribute to a separate Traditional or Roth IRA in addition to either one, subject to the usual IRA limits and income rules.
The account remains yours and keeps its balance — you simply stop making new self-employment contributions to it once you no longer have qualifying self-employment income. Many people roll it into an IRA or a new employer's plan later, but that's optional, not required.
Traditional (pre-tax) contributions to these accounts reduce your income tax, but not your self-employment tax — self-employment tax is calculated on your net profit before this deduction is applied. This is an important distinction when estimating your total tax savings from contributing.
It's available as long as you have no employees other than a spouse. If you hire employees beyond that, you'd typically need to transition to a different retirement plan structure that accommodates them, such as a standard 401(k) or a SEP IRA with employer contributions for staff.
This depends on your specific financial picture — interest rates on any debt, how stable your gig income is, and your overall goals all factor in. It's a broader financial planning question beyond gig-specific taxes, worth working through individually rather than following a one-size-fits-all rule.
Disclaimer: This article is for general educational purposes only and does not constitute personalized financial, investment, tax, or legal advice. Figures, rates, and rules mentioned may change over time — verify current details with an official source or a qualified professional before making financial decisions.