Best Retirement Accounts for Side Hustlers

The Tax Cheat Code Nobody Talks About

Here's something that took me three years of side hustling to discover, and I'm still annoyed nobody told me sooner: you can put up to $72,000 per year into a retirement account and deduct every dollar from your taxable income. Not $7,500 like a regular IRA. Not $24,500 like a workplace 401(k). Up to seventy-two thousand dollars. That's a tax deduction that can wipe out a significant chunk of your self-employment income — and build retirement wealth at the same time.

The catch, of course, is that you need to actually have $72,000 in net self-employment income to hit that cap. Most side hustlers don't. But even at more modest income levels — $20,000, $40,000, $60,000 in side hustle profit — the contribution limits on self-employed retirement accounts are dramatically higher than what most people realize. And the tax savings are immediate, not theoretical.

I opened a SEP IRA in my second year of side hustling and contributed $3,400. That single move reduced my tax bill by about $1,224. It felt like finding money in a coat pocket — except the coat pocket was a section of the tax code that nobody in my life had ever mentioned.

Why Self-Employed Retirement Accounts Are Different

When you work for an employer, they might offer a 401(k). You contribute as an employee, they might match as an employer. Two sides of the coin. When you're self-employed, you're both the employee and the employer — which means you can contribute from both sides. That's why the limits are so much higher.

A regular IRA has a $7,500 contribution limit for 2026 ($8,600 if you're 50 or older). A workplace 401(k) lets employees contribute up to $24,500. But self-employed retirement accounts — specifically the SEP IRA and Solo 401(k) — let you contribute as both the employee and employer, pushing the combined limit up to $72,000.

The other key advantage: these contributions reduce your taxable income dollar for dollar. Put $10,000 into a SEP IRA, and your taxable income drops by $10,000. At a 36% combined marginal rate, that's $3,600 in tax savings. The money goes into your retirement account instead of the government's coffers — and it grows tax-deferred until you withdraw it.

SEP IRA: The Simple One

SEP stands for Simplified Employee Pension, and the "simplified" part is accurate. A SEP IRA is the easiest self-employed retirement account to set up and manage. You can open one at Fidelity, Schwab, or Vanguard in about 15 minutes, and there's no annual filing requirement with the IRS.

The contribution limit is 25% of your net self-employment earnings, up to $72,000 for 2026. But "net self-employment earnings" has a specific definition that makes the effective rate lower than 25%. You start with your net profit from Schedule C, subtract the deductible half of self-employment tax, and then take 25% of that. The math works out to an effective contribution rate of about 18.6% of your Schedule C net profit.

What that looks like in practice: if your Schedule C shows $50,000 in net profit, your maximum SEP IRA contribution is about $9,300. Not $12,500 (which would be 25% of $50,000). The adjustment for SE tax brings it down. At $100,000 net profit, your max is about $18,600.

All SEP IRA contributions are "employer" contributions — there's no employee contribution side. This matters because it means the contribution is entirely based on your income. You can't front-load a large employee contribution and top it off with employer matching the way you can with a Solo 401(k). For lower-income side hustlers, this limits how much you can shelter.

The biggest advantage of a SEP IRA: you can open one and make contributions for the prior tax year all the way up to your filing deadline, including extensions. Didn't get around to it during the year? No problem — open a SEP IRA in March and fund it for last year before you file. This deadline flexibility is genuinely useful for side hustlers who don't know their annual income until after the year ends.

Solo 401(k): More Power, More Complexity

A Solo 401(k) — also called an individual 401(k) or self-employed 401(k) — gives you both the employee and employer contribution buckets. That dual structure is what makes it more powerful than a SEP IRA at lower to moderate income levels.

The employee contribution limit for 2026 is $24,500 ($32,500 if you're 50 or older). On top of that, you can make employer contributions of up to 25% of net self-employment earnings — the same calculation as a SEP IRA. The combined limit is $72,000 ($80,000 for 50+).

Why does this matter? Because at lower income levels, the employee contribution of $24,500 dwarfs what you'd be able to contribute to a SEP IRA. If your net self-employment income is $30,000, a SEP IRA limits you to about $5,580. A Solo 401(k) lets you contribute up to $24,500 as an employee plus about $5,580 as an employer — for a total of up to $30,080. That's a massive difference.

The Solo 401(k) also offers something the SEP IRA traditionally didn't: Roth contributions. You can designate your employee contributions as Roth, meaning you pay taxes now but withdrawals in retirement are tax-free. If you're in a lower tax bracket now than you expect to be later, the Roth option is valuable. (Note: SECURE 2.0 added Roth options to SEP IRAs as well, but not all brokerages have implemented it yet.)

Another perk: loan provisions. Many Solo 401(k) plans allow you to borrow up to 50% of your account balance, up to $50,000. You can't do this with a SEP IRA. I haven't used this feature and hopefully never will, but knowing it's there provides a safety net that doesn't exist with other account types.

The downsides of a Solo 401(k) are administrative. The plan must be established by December 31 of the year you want to contribute for — unlike a SEP IRA, you can't open one retroactively. And once your account balance exceeds $250,000, you'll need to file Form 5500-EZ with the IRS annually. It's a simple form, but it's one more thing to track.

Side-by-Side Comparison

For a full walkthrough of how each account type performs at different income levels, including contribution examples and tax savings math, see our dedicated SEP IRA vs Solo 401(k) comparison.

Feature	SEP IRA	Solo 401(k)
Employee contributions	No	Up to $24,500
Employer contributions	Up to 25% of net SE income	Up to 25% of net SE income
Combined max (2026)	$72,000	$72,000
Roth option	Yes (SECURE 2.0, limited brokerage support)	Yes (widely supported)
Plan loan option	No	Yes (up to $50,000)
Establishment deadline	Tax filing deadline (including extensions)	December 31 of the tax year
Annual IRS filing	None	Form 5500-EZ when balance exceeds $250,000
Can have employees	Yes (but you must cover them too)	No (owner + spouse only)
Setup complexity	Very easy (15 minutes)	Moderate (30-45 minutes, plan documents)

Which Wins at Different Income Levels

The right choice depends almost entirely on how much self-employment income you have. How the math plays out at different levels:

Under $25,000 net SE income: The Solo 401(k) wins by a wide margin. A SEP IRA at $25,000 nets you about $4,650 in contributions. A Solo 401(k) lets you contribute up to $24,500 as an employee (limited to your net earnings) plus about $4,650 as an employer. If you can afford to set aside a large portion of your income, the Solo 401(k) lets you shelter dramatically more. If you can only afford to save a small amount — say $2,000 — both accounts work equally well.

$25,000 to $100,000: Solo 401(k) still generally wins because of the employee contribution bucket. At $50,000 net SE income, the SEP IRA maxes at ~$9,300. The Solo 401(k) allows $24,500 + ~$9,300 = ~$33,800. Even if you don't max it out, having the higher ceiling gives you more flexibility.

Over $100,000: The gap narrows. At $150,000 net SE income, the SEP IRA allows about $27,900, and the Solo 401(k) allows about $24,500 + $27,900 = $52,400. The Solo 401(k) is still higher, but if you're only looking to contribute $25,000 or so, either account works. At this income level, the decision often comes down to whether you want the Roth option (Solo 401(k)) or the simpler administration (SEP IRA).

Over $345,000: Both accounts hit the same $72,000 §415(c) ceiling. The simple "25% × $288K = $72K" math is misleading — the real formula uses (net SE − 1/2 SE tax) × ~20% effective rate, so you actually need around $345K-$400K of net SE income to fully cap out (the exact number depends on whether your net SE crosses the SS wage base). At this point, SEP IRA and Solo 401(k) have identical contribution limits, and your choice should be based on features (Roth, loans, simplicity) rather than limits.

How to Actually Open Each One

Opening a SEP IRA is about as complicated as opening a regular brokerage account. Go to Fidelity, Schwab, or Vanguard's website. Click on "open an account." Choose SEP IRA. Fill in your personal info and business info. Fund it. You're done. There are no plan documents to draft, no government filings, and no plan administrator to hire. I opened mine at Fidelity in about 12 minutes during a lunch break.

A Solo 401(k) requires slightly more setup. You'll need to adopt a plan document — Fidelity and Schwab provide free pre-approved plan documents that cover most sole proprietors and single-member LLCs. You fill out the adoption agreement, set your plan year (usually calendar year), and submit it. The brokerage handles the rest. Plan on 30-45 minutes and possibly a phone call to the brokerage's retirement team if you have questions about the plan document. Not difficult, but not a 12-minute lunch break task either.

Remember: the Solo 401(k) must be established by December 31. If you're reading this in November and thinking about retirement accounts for this tax year, the clock is ticking. A SEP IRA gives you until your filing deadline — potentially October 15 of the following year — which is much more forgiving.

Contribution Deadlines You Can't Miss

For the SEP IRA, the contribution deadline matches your tax return deadline. Filing by April 15? Contribute by April 15. Filing an extension to October 15? You have until October 15 to fund the SEP. This is one of the SEP IRA's most underappreciated features — you get to see your full-year numbers before deciding how much to put in.

For the Solo 401(k), it's split. Employee contributions (the $24,500 bucket) technically should be made as soon as administratively feasible — for a sole proprietor, the IRS generally considers this to mean by your tax filing deadline. Employer contributions also must be made by your filing deadline, including extensions. But the plan itself must exist by December 31.

My strategy: I establish whatever I'm going to do before December 31, then fund it in February or March when I have a clear picture of my prior-year income. For the SEP IRA, there's no establishment deadline pressure. For the Solo 401(k), I made sure to open the plan in December of my first year even though I didn't contribute until the following March.

These accounts pair powerfully with other side hustle tax strategies. For a broader view of available deductions, see our side hustle tax deductions guide. And for context on how retirement contributions fit into your overall tax picture, the side hustle tax guide walks through the full Schedule C and SE tax process.