SEP IRA: the high-contribution retirement plan for self-employed owners

Retirement planning isn't something to put off, and that goes double if you own a business or work for yourself, like a lot of service-business owners in the United States.

I want to walk you through a tool that's still badly underused: the SEP IRA.

I'm telling you this from experience, not just from a textbook. As a financial consultant and a business owner myself, I know firsthand how easy it is to fall into the trap of earning well but never building a real plan for the future. Money comes in, money goes out, and the years go by. So let me explain exactly how this works and whether it fits you.

What is a SEP IRA?

SEP IRA stands for Simplified Employee Pension. It's a tax-advantaged retirement account built for people who are self-employed or run a small business with employees.

Think of it as the beefed-up cousin of the traditional IRA: same tax-deferred growth, but with far higher contribution limits and a lot more flexibility for someone running their own business. If you're a solopreneur, an independent professional, or you have a few W-2 employees, it's worth a serious look.

How a SEP IRA works

Before you decide if it's for you, it helps to see how it actually behaves year to year. A SEP IRA is generous and flexible, which fits the reality of running your own income. The key features:

• Employer-only contributions. Only the business (the employer) contributes, whether you have employees or not. As a self-employed owner, you're both. If you do have W-2 employees, you have to contribute the same percentage for everyone, including yourself.
• Year-by-year flexibility. You decide how much to put in each year, or skip it entirely if cash flow was tight. Nothing is locked in.
• High limits. You can contribute up to 25% of compensation, capped at $72,000 for 2026 (up from $70,000 in 2025). If you're self-employed (a sole proprietor or single-member LLC), that 25% works out to an effective ~20% of your net self-employment income, after the adjustment for half your self-employment tax.
• A late deadline. You can fund it up to your tax-filing deadline, including extensions, which means you can decide after you see how the year closed.

Why it matters for business owners

Earning well isn't enough. If you don't decide how you'll save and invest, the money that comes in leaves just as fast, and the IRS gets paid first. A SEP IRA lets you meaningfully lower your taxable income while you build the retirement side of your wealth. Every dollar you set aside with a plan today is one the tax bill doesn't touch.

Here's a real example. Carolina is a client of mine, an independent professional in Florida, disciplined with her numbers. She closed 2024 with around $200,000 in net self-employment income. We used a SEP IRA: she contributed close to $40,000, roughly 20% of her net, which is the effective ceiling for a self-employed owner. That lowered her taxable income substantially and saved her a serious amount in taxes that year. The key was having the structure in place and doing it on time.

SEP IRA vs Solo 401(k)

This is the comparison most owners actually need. Both let you contribute far more than a regular IRA, but they work differently.

• A SEP IRA is employer-only: there are no employee salary deferrals. It's simpler to set up and run, with less paperwork.
• A Solo 401(k) lets you contribute as both employee (a salary deferral) and employer, which often lets you reach a high contribution at a lower income level, plus it usually offers a Roth side.

Historically the SEP IRA had no Roth option and the Solo 401(k) did. That changed: under SECURE 2.0, Roth SEP contributions are now allowed if your plan and provider support them. If you want the full breakdown, see the Solo 401(k) guide.

Pros and cons

What makes it attractive:

• Fully tax-deductible contributions that lower your taxable income.
• High contribution ceiling, far above a regular IRA.
• Easy to open and run, with much less administration than a 401(k).
• Great for solopreneurs and small teams.

What to keep in mind:

• No employee salary deferrals. Unlike a Solo 401(k), you can't defer part of your own paycheck into it.
• You must match the percentage for employees. If you have W-2 staff, the same contribution rate applies to everyone, which gets expensive as you grow.
• Roth availability depends on your plan and provider (see above).

When a SEP IRA makes sense

It's a strong fit if:

• You're a solopreneur or have only a few W-2 employees.
• You've already maxed out a traditional or Roth IRA and want to put away more.
• Your business had a good cash-flow year and you want to bring your tax bill down.
• You want something simpler than a 401(k) but with high savings potential.

How to get started

1. Check that you qualify. Are you on your own, or do you have W-2 employees?
2. Calculate what you can contribute. How did the business actually perform this year?
3. Get a second set of eyes. Someone who does retirement planning can compare the SEP IRA against a Solo 401(k) and other options for your specific structure and goals.

The SEP IRA is a hidden gem for a lot of self-employed people and small-business owners in the U.S. It's simple to put in place and it gives you a clear path to save more and pay less. It works best as one piece of a bigger plan, alongside moves like the Augusta Rule and the QBI deduction. If you want help deciding, book a consultation.

Frequently asked questions

What does SEP IRA stand for?

Simplified Employee Pension. It's a retirement account funded by the employer, built for the self-employed and small businesses.

How does a SEP IRA work?

The business contributes on the owner's (and any employees') behalf, up to a percentage of compensation capped at an annual IRS limit. You choose the amount each year, and you can fund it up to your tax deadline including extensions.

Is a SEP IRA a traditional IRA?

It follows traditional-IRA tax treatment (pre-tax in, tax-deferred growth, taxed when you withdraw), but with much higher, employer-funded contribution limits. Since SECURE 2.0, your plan can also offer a Roth SEP option if the provider supports it.

How much can I contribute to a SEP IRA?

Up to 25% of compensation, capped at $72,000 for 2026. For self-employed owners, that works out to an effective ~20% of net self-employment income once the self-employment-tax adjustment is applied.

Are SEP IRA contributions tax-deductible?

Yes, and how you take it depends on your structure. If you're self-employed, you deduct your own contribution on Schedule 1 of your Form 1040 (not on Schedule C). If you run an S-Corp, the corporation deducts the contribution it makes based on your W-2 wages. Either way, it lowers taxable income.

What's the SEP IRA contribution deadline?

You can fund it up to your tax-filing deadline, including extensions. For a sole proprietor filing for 2026, that can be as late as October 15, 2027 with a valid extension. The same rule applies to an S-Corp by its business return due date.

SEP IRA vs Solo 401(k), which is better?

A Solo 401(k) often lets you contribute more at a lower income (because of employee deferrals) and usually offers Roth, but it's more paperwork. A SEP IRA is simpler. The right one depends on your income, whether you have employees, and whether you want Roth.

SEP IRA vs SIMPLE IRA?

A SIMPLE IRA is built around employee salary deferrals (a $17,000 limit for 2026) with minimal employer cost. A SEP IRA has no employee deferrals, but it allows far higher employer contributions (up to $72,000 for 2026). For a profitable solo owner, the SEP usually allows much more.

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

Yes, you can participate in both, including a Solo 401(k). But watch two limits: your employee salary deferrals are capped per person across all plans ($24,500 for 2026), and total contributions to one employer's plans can't exceed the overall limit ($72,000 for 2026). If the SEP and the 401(k) are run by the same business, that $72,000 is one shared ceiling, not one per plan.

Can I have a SEP IRA and a Roth IRA?

Yes, they're separate accounts. You can contribute to both in the same year, subject to the Roth IRA's own income limits.

Can employees contribute to a SEP IRA?

No. SEP IRA contributions come only from the employer. Employees can't defer their own salary into it.

Is there a Roth SEP IRA?

Yes. Since SECURE 2.0, Roth SEP contributions are permitted, but it's optional: your plan and IRA custodian have to offer the feature. Traditional pre-tax SEP contributions are still the standard.