SIMPLE IRA vs. SEP IRA: Which One Fits Your Business

Q: What's the basic difference between a SIMPLE IRA and a SEP IRA?

A SEP IRA is funded entirely by employer contributions — for a self-employed person, that's you, contributing as your own employer — up to 25% of adjusted net self-employment earnings, capped at $72,000 for 2026. A SIMPLE IRA is funded primarily by your own elective deferrals, up to $17,000 in 2026 ($18,100 for eligible small plans), plus a required employer match or nonelective contribution on top. SEP contributions are entirely discretionary year to year; SIMPLE contributions, once you've adopted the plan, come with a mandatory employer piece for every eligible participant, including yourself.

Q: Which one lets me save more money in 2026?

For most solo freelancers with healthy profit, the SEP IRA wins by a wide margin. A SEP contribution scales with 25% of adjusted net self-employment earnings up to a $72,000 cap; a SIMPLE IRA's core lever — your own elective deferral — tops out at $17,000 ($18,100 for eligible plans) regardless of profit. At $250,000 of net Schedule C profit, a SEP allows roughly $47,000 in 2026; a SIMPLE's elective deferral alone is $17,000, plus a modest required employer contribution on top. The SIMPLE wins only at low profit levels, where its deferral isn't tied to a percentage of earnings the way a SEP contribution is.

Q: Can I contribute to a SIMPLE IRA even in a low-profit year?

Yes, and this is the SIMPLE's real advantage: your elective deferral is a fixed dollar choice, not a percentage of profit, so you can defer up to $17,000 even in a year where 25% of your net earnings would be far less. A SEP contribution is capped by a percentage of that year's earnings, so a lean year automatically caps how much you can shelter — sometimes to very little. If your income is uneven year to year and you want a savings target you control directly, that's a real reason to prefer a SIMPLE.

Q: What happens to my SIMPLE or SEP if I hire an employee?

This is where the two plans diverge sharply, and it's the part contribution-limit comparisons usually skip. A SEP requires you to contribute the same percentage of compensation for every eligible employee that you contribute for yourself — a generous SEP for yourself gets expensive fast once you have payroll. A SIMPLE IRA requires a smaller, capped employer contribution for every eligible employee (a 3% match, or a flat 2% nonelective, on top of whatever they defer themselves), which is usually far cheaper to extend to a small team than matching a large SEP percentage. If you're likely to hire even one or two people, that asymmetry matters more than the headline dollar limits.

Q: Can I have both a SIMPLE IRA and a SEP IRA in the same year?

No. A SIMPLE IRA generally has to be the only retirement plan you maintain for the year it's in effect — you can't run a SIMPLE and a SEP (or most other qualified plans) side by side for the same employer in the same year. A SEP has no equivalent restriction on its own, but switching between the two isn't something to do casually mid-year; each has its own establishment deadline and its own rules for the year you switch. Decide for the year, not for the moment.

Published: September 9, 2026 · Reading time: 8 min

TL;DR: A SEP IRA scales with profit — up to $72,000 in 2026, funded entirely by discretionary employer contributions you control year to year. A SIMPLE IRA caps your own elective deferral at $17,000 ($18,100 for eligible small plans) regardless of profit, but requires a mandatory employer contribution on top and can't be run alongside another retirement plan in the same year. For most solo freelancers with solid, consistent profit, the SEP wins on ceiling — often by tens of thousands of dollars. The SIMPLE wins for freelancers with lean or unpredictable income who want a fixed savings target, and it becomes meaningfully cheaper to extend to employees if you're ever likely to hire.

Two solo freelancers, same net profit, same goal — shelter as much retirement savings as legally possible. One opens a SEP IRA. One opens a SIMPLE IRA. Their contribution limits for the same $250,000 profit differ by roughly $30,000.

Here's why, and which one you actually want.

The Mechanics, Side by Side

	SEP IRA	SIMPLE IRA
Who contributes	Employer only (you, as your own employer)	You (elective deferral) + mandatory employer match/nonelective
2026 contribution ceiling	Lesser of 25% of adjusted net SE earnings or $72,000	$17,000 elective deferral ($18,100 for eligible small plans), plus employer piece
2026 catch-up (age 50+)	None — SEP has no separate catch-up provision	$4,000 standard / $3,850 for eligible small plans
2026 catch-up (ages 60–63)	N/A	$5,250
How the employer contribution is decided	Fully discretionary — choose a different percentage, or zero, each year	Mandatory once adopted: a dollar-for-dollar match up to 3% of compensation, or a flat 2% nonelective contribution to every eligible employee
Can profit be $0 and you still contribute?	No — the employer contribution is capped by that year's compensation	Yes for the elective-deferral piece, up to available earnings
Can you run it alongside another plan the same year?	No general restriction of its own	No — generally must be your only plan for the year
Complexity to establish	Simple, one-page adoption (Form 5305-SEP or provider equivalent)	Slightly more involved — requires employee notices even if you're the only participant, plus an annual election period
Loans available?	No — like all IRA-based plans	No

The 2026 figures above (SEP $72,000 / 25% of compensation with a $360,000 compensation cap; SIMPLE $17,000 standard deferral, $18,100 for plans of employers with 25 or fewer employees, catch-ups of $4,000 / $3,850 / $5,250) come directly from the IRS's own cost-of-living adjustment tables for 2026.

Why the SEP's Ceiling Is So Much Higher

A SEP contribution for a self-employed person isn't simply 25% of net Schedule C profit — the IRS requires a two-step adjustment because the deduction and the self-employment tax deduction both reduce the base you're contributing against. The IRS's own worked methodology: take the plan's stated rate (25% for a maximum SEP), divide it by 100% plus that rate to get a reduced contribution rate — for a 25% plan, that's 25% ÷ 125% = 20% exactly — and apply that reduced rate to your net profit after subtracting the deduction for one-half of self-employment tax.

Worked example, computed exactly:

A freelancer nets $250,000 on Schedule C for 2026, with no other income and no other retirement plan.

Step	Amount
Net Schedule C profit	$250,000.00
Net earnings from self-employment (92.35% of profit)	$230,875.00
2026 self-employment tax (15.3% up to the $184,500 wage base, 2.9% above it)	$29,573.38
One-half SE tax deduction	$14,786.69
Net profit reduced by the SE tax deduction	$235,213.31
× 20% reduced SEP rate (25% ÷ 125%)	$47,042.66

$47,042.66 — well under the $72,000 statutory cap, so the cap isn't the binding constraint here; the 20%-of-adjusted-earnings formula is. The cap only binds at higher profit: a freelancer netting $500,000 would compute a raw figure north of $96,000 under the same formula, but the $72,000 ceiling caps it there instead.

Compare the SIMPLE's core lever at the same $250,000 of profit: the elective deferral alone is capped at $17,000, a full $30,042.66 below what the SEP allows — plus the SIMPLE's own required employer match or nonelective contribution on top, which is real money but nowhere close to closing a $30,000 gap on its own. At this income level, the SEP's percentage-of-earnings design simply outscales the SIMPLE's fixed-dollar deferral.

Where the comparison flips

The SEP's advantage is entirely a function of profit. A freelancer netting $40,000 would see a SEP ceiling of $7,434.82 under the same 20%-reduced-rate formula (net earnings from SE $36,940.00 → SE tax $5,651.82 → half $2,825.91 → adjusted base $37,174.09 → ×20%) — nowhere near the SIMPLE's $17,000 deferral, which isn't tied to profit at all (subject only to having enough net earnings to support the deferral). In a lean year, the SIMPLE lets you shelter far more than a percentage-of-profit formula would ever allow.

Computing your own exact employer-side SIMPLE contribution as a self-employed person uses the same kind of adjusted-compensation worksheet as the SEP calculation above — IRS Publication 560 covers both. This piece is genuinely worth running through that worksheet or tax software rather than estimating, since the self-employed "compensation" base for the employer-side contribution isn't simply your net profit.

The Hiring Question Nobody Compares

Every SIMPLE-vs-SEP comparison leads with contribution limits. The one that actually changes freelancers' decisions is what happens if you hire.

A SEP requires the same contribution percentage for every eligible employee that you give yourself. If you contribute the equivalent of 20% of your own adjusted earnings, you owe the same 20% of compensation to every eligible employee — no picking and choosing. For a solo consultant who occasionally brings on a part-time assistant, a generous SEP percentage can get expensive fast, or force you to scale back your own contribution to keep the employee's affordable.

A SIMPLE IRA's employer obligation is capped and predictable: a 3% dollar-for-dollar match (which you can even reduce to as low as 1% in two of any five years, with notice), or a flat 2% nonelective contribution to every eligible employee whether they defer or not. Either way, the ceiling on what you owe an employee is far lower than an equivalent-percentage SEP obligation would be.

If you're a genuinely solo operation with no plans to hire, this distinction is irrelevant and the SEP's higher ceiling should usually win. If hiring even one part-time employee is realistic in the next few years, price out what a SEP would cost you per employee before committing — it can change the answer.

Frequently Asked Questions

What's the basic difference between a SIMPLE IRA and a SEP IRA?

A SEP is funded entirely by discretionary employer contributions, up to 25% of adjusted net self-employment earnings or $72,000 for 2026. A SIMPLE is funded mainly by your own elective deferral, up to $17,000 ($18,100 for eligible plans) for 2026, plus a mandatory employer match or nonelective contribution.

Which one lets me save more money in 2026?

For most freelancers with solid profit, the SEP — often by tens of thousands of dollars, since it scales with earnings rather than capping at a fixed dollar deferral.

Can I contribute to a SIMPLE IRA even in a low-profit year?

Yes — the elective deferral is a fixed dollar choice up to $17,000, not tied to a percentage of that year's profit the way a SEP contribution is.

What happens to my SIMPLE or SEP if I hire an employee?

A SEP requires the same contribution percentage for every eligible employee that you take for yourself. A SIMPLE's employer obligation is capped at a 3% match or 2% nonelective contribution — usually far cheaper to extend to a small team.

Can I have both a SIMPLE IRA and a SEP IRA in the same year?

No. A SIMPLE generally has to be your only retirement plan for the year it's in effect.

Authoritative References

IRS — COLA increases for dollar limitations on benefits and contributions: 2026 SEP and SIMPLE dollar limits
IRS — 401(k) limit increases to $24,500 for 2026, IRA limit increases to $7,500: 2026 SIMPLE deferral and catch-up figures, Notice 2025-67
IRS — Self-employed individuals: calculating your own retirement plan contribution and deduction: the reduced-rate worksheet methodology used above
IRS — Publication 560, Retirement Plans for Small Business: SEP and SIMPLE eligibility, establishment deadlines, and the "only plan for the year" rule

Know What You Can Actually Shelter Before You Choose

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This guide is general education for U.S. freelancers and independent contractors filing for the 2026 tax year. It is not personalized tax advice or retirement planning advice. Exact contribution amounts depend on your full-year net earnings, filing status, and other retirement plans; run the precise worksheet in IRS Publication 560 or consult a licensed tax or financial professional before establishing either plan.

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