SEP IRA explained: the retirement account most freelancers don't know about

If you're a high-earning consultant, a freelancer with a six-figure book of business, or a W-2 employee with a meaningful side hustle, there is a retirement account designed almost exactly for you. It lets you shelter up to $72,000 of self-employment income from federal taxes in 2026. It takes about ten minutes to open. The IRS lets you fund it as late as your tax filing deadline — including extensions, which can push the contribution window into October of the following year.

It's called a SEP IRA, short for Simplified Employee Pension. And despite being one of the most powerful tax-deferral tools available to self-employed people, most freelancers either don't know it exists or assume it's for someone else.

This guide is for high earners who actually need the shelter. We'll walk through how the SEP works, the contribution math that trips up most articles (the 25% vs. 20% rule), how it stacks against a Solo 401(k), the new Roth SEP option under SECURE 2.0, and one critical caveat that destroys backdoor Roth strategies if you're not careful.

What a SEP IRA actually is

A SEP IRA is a traditional IRA wrapper that an employer funds on behalf of an employee. The "employer" can be:

• A solo consultant or freelancer paying themselves (you are both the employer and the employee).
• A single-member LLC or sole proprietor with no W-2 staff.
• A small business owner with employees — though as we'll cover, that triggers obligations you need to understand.
• Someone with a side business in addition to a day job.

Key mechanics:

• Only the employer contributes. Employees do not defer their own paychecks into a SEP. This is a profit-sharing-style contribution funded by the business.
• Contributions are pre-tax by default — they reduce your business's taxable income (or your self-employment income on Schedule C).
• Investments grow tax-deferred. You owe ordinary income tax on withdrawals in retirement.
• It's an IRA, not a 401(k). Lower administrative overhead, no Form 5500 in most cases, no plan document maintenance, no nondiscrimination testing.

For most self-employed people, this means you can open a SEP at any major custodian (Fidelity, Schwab, Vanguard) in one sitting, fund it once a year at tax time, and call it done.

2026 contribution limits — the headline number

For 2026, the SEP IRA contribution cap is the lesser of:

• 25% of compensation, or
• $72,000 (up from $70,000 in 2025)

The $72,000 figure comes from IRS Notice 2025-67, which sets the defined contribution annual additions limit for 2026.

There are no catch-up contributions for SEP IRAs. The cap is the cap whether you're 35 or 65 — which is one of the few areas where the SEP loses to a Solo 401(k) for older savers.

The 25% vs. 20% calculation — get this right

This is where almost every article and most freelancers get tripped up. The contribution rule is "25% of compensation," but what counts as compensation depends on how your business is structured.

If you're an S-corp or C-corp owner paid as a W-2 employee

You contribute up to 25% of your W-2 wages from the business, capped at $72,000.

Example: You pay yourself $200,000 in W-2 wages from your S-corp. Your SEP contribution is $200,000 × 25% = $50,000. Simple.

If you're a sole proprietor or single-member LLC (Schedule C)

This is where the math changes. The IRS does not let self-employed people contribute 25% of their gross self-employment income. Instead, you must use a reduced rate of roughly 20% applied to your net self-employment earnings after subtracting half of your self-employment tax.

The formula:

1. Start with net self-employment earnings (Schedule C profit).
2. Subtract half of your self-employment tax (the deductible portion).
3. Multiply the result by 20% (technically 0.2, derived from 0.25 ÷ 1.25).

Worked example

Sarah is a freelance management consultant. Her Schedule C net profit for 2026 is $250,000.

• Self-employment tax (roughly): $250,000 × 92.35% × 15.3% on the first portion, then 2.9% Medicare above the Social Security wage base. For 2026 the effective SE tax on $250,000 lands at about $19,640.
• Half of SE tax (deductible): about $9,820.
• Adjusted net earnings: $250,000 − $9,820 = $240,180.
• Maximum SEP contribution: $240,180 × 20% = $48,036.

Note: Sarah is nowhere near the $72,000 cap, even at $250,000 of net profit. To hit the $72,000 ceiling, a sole proprietor needs roughly $372,000 of net self-employment income after the SE tax adjustment.

The takeaway: if you're self-employed and using gross 25% in your head, you're overstating what you can shelter. Run the actual formula or use the worksheet in IRS Publication 560.

Deadline flexibility — the SEP's underappreciated feature

For most retirement accounts, you have to fund them during the calendar year. SEPs are different.

You can fund a SEP IRA up to your business's tax filing deadline — including extensions.

For a sole proprietor or single-member LLC, that means:

• April 15, 2027 for 2026 contributions (default).
• October 15, 2027 if you file an extension.

For an S-corp or partnership, the default deadline is March 15, with a September 15 extension.

This is significant for two reasons:

1. You can decide how much to contribute after you know your final tax bill. No guessing in December.
2. You can open and fund a SEP after the calendar year ends — even if the account didn't exist on December 31. As long as it's established and funded by your filing deadline, the contribution counts for the prior year.

For high earners who get hit with a six-figure tax bill in April and didn't max out other accounts, the SEP becomes a last-mile tax shelter.

SEP vs. Solo 401(k) vs. SIMPLE IRA — when to pick which

The SEP is the simplest of the three, but it's not always the right choice.

Solo 401(k)

A Solo 401(k) is for self-employed people with no W-2 employees (a spouse is OK). It allows two types of contributions:

• Employee deferral: up to $24,500 in 2026 ($32,500 if age 50+, $35,750 ages 60–63 under the SECURE 2.0 super catch-up).
• Employer profit-sharing: up to 25% of compensation (same math as SEP).
• Combined cap: $72,000 total in 2026 ($79,500 with catch-up, $83,250 ages 60–63).

Pick a Solo 401(k) when:

• Your net SE income is below ~$200,000. The employee deferral lets you hit a higher contribution at lower income levels than a SEP can.
• You're 50+ and want catch-up contributions.
• You want a Roth bucket (Roth Solo 401(k) is broadly supported, unlike Roth SEP — see below).
• You want loan flexibility (some Solo 401(k) plans allow participant loans).

Pick a SEP when:

• Simplicity matters more than squeezing every dollar.
• You have W-2 employees and don't want the complexity of a 401(k) plan.
• You want flexibility to skip contributions in lean years (Solo 401(k) is more forgiving than SIMPLE on this, but SEP is the most flexible).
• You may need to fund retroactively after year-end (SEPs can be opened after December 31 for the prior year; Solo 401(k)s generally must be established by December 31, though SECURE 2.0 added some retroactive flexibility for sole proprietors).

SIMPLE IRA

Designed for small businesses with up to 100 employees. Employee deferral cap of $17,000 in 2026 ($21,000 if age 50+; $22,250 ages 60–63). Employers must either match employee contributions or make a non-elective contribution. Lower contribution caps make this less attractive for high earners. Mostly skip this one unless you have staff and want to offer them a plan that requires meaningful employer contributions.

If you have W-2 employees — the eligibility trap

Here's the part that surprises a lot of small business owners who set up a SEP for themselves and forget about their staff.

A SEP requires you to make contributions for every eligible employee at the same percentage you contribute for yourself.

Eligible means:

• Age 21 or older.
• Worked for you in at least 3 of the last 5 years (any amount of service counts).
• Earned at least the IRS minimum compensation threshold for the year (indexed annually; about $800 in 2026, up from $750 in 2025).

You cannot impose stricter eligibility than this. You can be more generous — but not less.

So if you contribute 20% of your own compensation, you owe 20% of every eligible employee's compensation as well. For solo consultants, this is a non-issue. For business owners with staff, it can quickly make a SEP more expensive than a 401(k) with employer matching.

This is one of the main reasons SEPs are usually framed as "the solo consultant's account." Once you have W-2 staff, the math often points toward a 401(k) instead.

For a deeper look at building out a small-business retirement plan with employees, talk to a wealth manager before you open the account — restructuring later is more painful than getting it right the first time.

Roth SEP — new under SECURE 2.0, but adoption is uneven

SECURE 2.0 (Section 601) added the option for SEP IRA contributions to be designated as Roth starting in 2023. This is genuinely new and worth knowing about — but with a critical caveat.

How a Roth SEP works:

• The employer makes a SEP contribution as usual.
• The employee elects to treat the contribution as Roth.
• The contribution amount is included in the employee's taxable W-2 wages for the year (essentially treated like an automatic Roth conversion).
• The contribution still counts as deductible for the employer.
• The money grows tax-free and qualified withdrawals in retirement are tax-free.

The catch: custodian adoption is still patchy. As of late 2025 and into 2026, many large mainstream custodians (Fidelity, Schwab, Vanguard) have been slow to roll out Roth SEP infrastructure. Some self-directed and niche IRA custodians offer it; many traditional providers still default to pre-tax SEP only.

If a Roth SEP is important to you — for example, because you're in a lower-than-usual income year and want to lock in tax-free growth — call your custodian directly and ask:

1. Do you support designated Roth SEP IRA employer contributions under SECURE 2.0 Section 601?
2. What forms or amendments are required?
3. How will the contribution be reported on my W-2?

If they can't support it, this becomes a reason to consider a Roth Solo 401(k) instead, where Roth functionality has been standard for years.

Tax deduction mechanics

For traditional (pre-tax) SEP contributions:

• Schedule C / sole proprietor: deductible "above the line" on Schedule 1, Line 16 of Form 1040.
• Partnership: deductible by the partner on their personal return.
• S-corp: deductible by the corporation on Form 1120-S as an employee benefit expense.
• C-corp: deductible by the corporation on Form 1120.

The deduction reduces your adjusted gross income (AGI), which can have downstream benefits: lower federal income tax, lower state income tax in most states, potentially smaller IRMAA Medicare premiums if you're near a threshold, preservation of phase-out-sensitive credits and deductions, and protection of the Section 199A QBI deduction (which phases out for service businesses above $201,775 single / $403,500 MFJ in 2026).

For high-earning consultants, the QBI interaction is often the biggest hidden value of the SEP: a $50,000 SEP contribution can pull you back under the QBI phase-out threshold, restoring a deduction that would otherwise vanish.

The backdoor Roth complication — read this before you fund a SEP

Here is the rule that destroys backdoor Roth strategies for high earners with SEP balances, and that most freelancers don't understand until it's too late.

The pro-rata rule (sometimes called the cream-in-coffee rule) applies whenever you do a Roth conversion from a traditional IRA. The IRS treats all of your traditional, SEP, and SIMPLE IRA balances as a single pool when calculating how much of a conversion is taxable.

Example: Your SEP IRA holds $200,000 of pre-tax money. You want to do a backdoor Roth — contributing $7,500 of non-deductible money to a traditional IRA and converting it.

Without the SEP balance, the conversion would be tax-free (you'd be moving $7,500 of already-taxed money).

With the SEP balance, the pro-rata rule applies. The IRS sees a total IRA balance of $207,500, of which only $7,500 (about 3.6%) is non-deductible basis. So your $7,500 conversion is 96.4% taxable, generating roughly $7,200 of ordinary income — defeating the entire point of the strategy.

This is a major gotcha for high earners. If you're above the Roth IRA income phase-out ($153,000–$168,000 single / $242,000–$252,000 MFJ in 2026) and rely on the backdoor Roth, opening a SEP IRA shuts that door.

Workarounds:

1. Use a Solo 401(k) instead of a SEP. Solo 401(k) balances are not aggregated with IRA balances for pro-rata purposes. You can run a backdoor Roth cleanly even with a $500,000 Solo 401(k) balance.
2. Reverse-roll the SEP into your employer's 401(k) if you have a day-job plan that accepts rollovers. Once the SEP balance is in a 401(k), it's invisible to the pro-rata calc.
3. Skip the backdoor Roth and use the Roth SEP option if your custodian supports it.

For high earners with a side business in addition to a W-2 day job — a very common HNW pattern — the Solo 401(k) is almost always the better answer for this reason alone.

Investment options

A SEP IRA at a major custodian gives you essentially unrestricted access to:

• Stocks and ETFs
• Mutual funds
• Bonds and Treasuries
• CDs and money market funds
• Options (with appropriate trading approval)

What you can't do inside a standard SEP IRA: hold real estate directly, invest in private placements, or use leverage. Self-directed SEP IRA custodians offer those features, but they come with substantial complexity, prohibited transaction risk, and higher fees. For 95% of HNW consultants, a standard SEP at Fidelity or Schwab with a low-cost three-fund portfolio is the right call.

HNW use cases — when the SEP actually shines

The SEP is most powerful when:

1. You're a high-income consultant or fractional executive with $250,000+ in 1099 or K-1 income, no W-2 employees, and your priorities are simplicity plus a meaningful tax deduction this year.

2. You have part-time business income on top of a W-2 job. Your day-job 401(k) caps out at $24,500 of employee deferrals. A SEP on your side-business income can add tens of thousands more in tax-deferred contributions. (Note the pro-rata rule above — Solo 401(k) is often better.)

3. You're layering multiple buckets. Day-job 401(k) ($24,500 employee deferral) + side-business SEP (up to 20% of net SE earnings) + spousal IRA + HSA. A focused two-earner household can shelter well north of $100,000 a year this way.

4. You sold a business or had a windfall consulting year and want to fund retroactively. Open and fund a SEP for the prior year up to your extended filing deadline — useful when last year's numbers come in higher than expected.

5. You're approaching or exceeding the QBI phase-out and need a deduction to preserve the 20% pass-through deduction on remaining income.

If you're working through how a SEP fits with the rest of your retirement architecture — Roth conversions, taxable brokerage, equity comp, real estate — a wealth coach can map the full picture before you fund the account.

How to actually open one

1. Pick a custodian (Fidelity, Schwab, and Vanguard all offer no-fee SEP IRAs).
2. Complete IRS Form 5305-SEP — most custodians embed this in their online account opening.
3. Open the account in the name of your business (or yourself as a sole proprietor).
4. Fund it from your business bank account.
5. Invest the cash.

Total time: about fifteen minutes. The tax savings, for a high earner, can run into the tens of thousands.

Related reading on PWC

• Traditional 401(k) vs Roth 401(k): how to actually decide
• Average retirement savings by age: where you should actually be at 30, 40, 50, 60
• I just inherited an IRA — now what? (The 10-year rule, explained)
• 529 plans in 2026: the basics + the superfunding move most parents don't know
• Financial planning during divorce
• Remember the 2026 estate tax cliff? Here's what actually happened

FAQ

What is the SEP IRA contribution limit for 2026?

The 2026 SEP IRA contribution limit is the lesser of 25% of compensation or $72,000 (up from $70,000 in 2025). For self-employed individuals filing Schedule C, the effective rate is closer to 20% of net self-employment earnings after subtracting half of self-employment tax.

Can I have both a SEP IRA and a 401(k)?

Yes. If you have a W-2 job with a 401(k) and a side business, you can contribute to your employer's 401(k) and fund a SEP for your side-business income. The $72,000 annual additions limit applies separately to each unrelated employer's plan, so you can effectively shelter income in both.

When is the SEP IRA contribution deadline?

You can fund a SEP IRA up to your business's tax filing deadline, including extensions. For a sole proprietor, that's April 15 of the following year, or October 15 with an extension. You can also open and fund a SEP after the calendar year ends — as long as it's established and funded by your filing deadline, the contribution counts for the prior year.

Does a SEP IRA contribution mess up my backdoor Roth?

Yes — and this is one of the most important gotchas for high earners. The pro-rata rule treats all your traditional, SEP, and SIMPLE IRA balances as one pool when calculating Roth conversion taxes. If you have a meaningful SEP balance, a backdoor Roth becomes mostly taxable. High earners who want to keep the backdoor Roth open should usually use a Solo 401(k) instead.

Can I do a Roth SEP IRA?

Technically yes, under SECURE 2.0 Section 601 starting in 2023. In practice, custodian support is still uneven as of 2026. Many major brokerages have been slow to roll out Roth SEP infrastructure. Call your custodian directly to ask if they support designated Roth SEP contributions. If they don't, consider a Roth Solo 401(k) instead.

What's the difference between a SEP IRA and a Solo 401(k)?

A SEP allows only employer profit-sharing contributions (up to 25% of compensation, $72,000 cap). A Solo 401(k) allows both employee deferrals ($24,500 in 2026, with catch-up for age 50+) and employer profit-sharing, up to the same $72,000 cap. The Solo 401(k) lets you hit the cap at lower income levels, offers catch-up contributions, has broader Roth support, and protects your backdoor Roth. The SEP is simpler and works for any business size, including those with W-2 employees.

Do I have to contribute to my employees' SEP IRAs?

Yes, if they meet the eligibility rules: age 21+, worked for you in 3 of the last 5 years, and earned at least the IRS minimum compensation (about $800 in 2026). You must contribute the same percentage of compensation for every eligible employee that you contribute for yourself. This is the main reason SEPs work best for solo consultants and stop being attractive once you have a real staff.

Putting it together

For high earners with self-employment income — consultants, freelancers, side-hustlers, business owners without staff — the SEP IRA is one of the most efficient single-step tax shelters available. Up to $72,000 of pre-tax contributions, deductible against this year's income, with a funding deadline that can run into October of the following year.

But it's not the right answer for everyone. If you rely on the backdoor Roth, want catch-up contributions, or have W-2 employees, a Solo 401(k) or full 401(k) plan is usually better. And if you're considering the Roth SEP option, call your custodian before you assume it's available.

If you'd like help mapping a SEP into the rest of your retirement architecture — including how it interacts with your day-job 401(k), backdoor Roth strategy, or QBI deduction — book a call with a PWC advisor.