What Is a SEP IRA and How Does It Work?

If you're self-employed, no one is setting up a 401(k) for you. A SEP IRA is the closest thing you can set up yourself: a retirement plan you fund as the employer, with contribution limits far above a regular IRA and almost none of the paperwork.

For a lot of solo business owners, it's the simplest way to shelter serious money from taxes.

This guide covers what a SEP IRA is, who it's for, how much you can contribute in 2026, its pros and cons, how it compares to other plans, and how to set one up.

Key takeaways

• A SEP IRA is a simplified, employer-funded retirement plan for the self-employed and small businesses.
• For 2026, you can contribute up to 25% of compensation, capped at $72,000 (up from $70,000 in 2025).
• Only the employer contributes; employees can't make salary deferrals, and all contributions are immediately vested.
• If you have employees, you must contribute the same percentage of pay for each eligible one.
• Contributions are tax-deductible, and you can set up and fund a SEP IRA up to your tax deadline, including extensions.

What a SEP IRA is

SEP stands for Simplified Employee Pension. It's a retirement plan that lets a business, including a one-person business, contribute to traditional IRAs set up for the owner and any eligible employees. The "simplified" part is real: setup is a single IRS form and there's little ongoing administration.

The defining feature is that it's employer-funded. Contributions come from the business, not from employee salary deferrals, and they're immediately 100% vested in whoever receives them. For a self-employed person, you're both the employer and the employee, so you fund it for yourself.

That combination, high limits and low complexity, is why SEP IRAs are popular with freelancers, consultants, and small business owners who want a real retirement plan without running a 401(k).

Who is a SEP IRA for?

A SEP IRA fits best when the business is you, or you plus a few people. Self-employed individuals, freelancers, consultants, and single-owner LLCs are the classic users, because they can contribute a large share of income with minimal setup.

It also works for small businesses with employees, but with a catch covered below: you have to contribute the same percentage for every eligible employee. That's manageable with a tiny team and expensive as you grow.

If you're weighing retirement options as a self-employed person, a SEP IRA sits alongside the Solo 401(k), the SIMPLE IRA, and a regular traditional or Roth IRA, each with different trade-offs.

How much you can contribute in 2026

This is the SEP IRA's biggest draw. For 2026, an employer can contribute up to the lesser of 25% of an employee's compensation or $72,000, up from $70,000 in 2025. Compensation counts up to an annual cap of $360,000 for 2026.

There's an important wrinkle for the self-employed. Because your "compensation" is net self-employment income, and the contribution itself reduces that figure, the effective maximum works out to roughly 20% of net self-employment earnings rather than a flat 25%.

Your self-employment tax deduction factors in too, so it's worth running the numbers or having your accountant do it.

Two more rules: SEP IRAs don't allow catch-up contributions for those 50 and older, unlike 401(k)s, and employees can't add their own salary deferrals. These limits adjust annually, so confirm the current figures on the IRS SEP contribution limits page before you contribute.

SEP IRA pros and cons

The upsides are what make it attractive. The contribution limit is far higher than a regular IRA's; setup and administration are simple, contributions are tax-deductible to the business, and it's flexible – you decide each year whether and how much to contribute, which helps in uneven-income years.

The downsides matter mostly once you have employees. You must contribute the same percentage of pay for yourself and every eligible employee, so funding your own account generously means funding theirs too. There are no catch-up contributions, and employees can't contribute their own money.

For a solo business owner, the cons barely bite. For a growing business with staff, they're the reason many eventually switch to a 401(k), which allows employee deferrals and more flexible employer contributions.

SEP IRA vs other retirement plans

A SEP IRA isn't the only option, and the right one depends on your situation. Here's how it compares at a glance.

A Solo 401(k) often lets a solo owner contribute more at lower income levels, because it combines an employee deferral with an employer contribution, and it allows catch-up contributions and Roth options. A SIMPLE IRA suits small businesses that want employees to contribute too, with lower limits. A regular IRA has much lower limits but no business needed.

If retirement limits across plans are what you're comparing, our guide to 401(k) contribution limits covers that side. The short version: SEP IRAs win on simplicity and high limits for solo owners; Solo 401(k)s win on flexibility and catch-ups.

How to set up a SEP IRA

Setting one up is genuinely quick, which is part of the appeal. There are three basic steps.

1. Adopt a plan agreement. Complete IRS Form 5305-SEP, the model plan document, or use a provider's equivalent. This establishes the plan; you generally keep it on file rather than filing it with the IRS.
2. Open SEP IRA accounts. Open a SEP IRA at a broking or bank for yourself and each eligible employee.
3. Make contributions. Decide your contribution amount for the year and deposit it into the accounts.

A real advantage: you can set up and fund a SEP IRA up to your business's tax filing deadline, including extensions. That means you can open one after year-end and still contribute for the prior tax year, which is useful when you're finalising your numbers at tax time.

Taxes on a SEP IRA

The tax treatment is straightforward and favourable. Contributions the business makes are tax-deductible, which lowers the business's taxable income for the year. The money then grows tax-deferred inside the account.

You pay tax when you withdraw in retirement, at your ordinary income rate at that time, the same as a traditional IRA. Early withdrawals before age 59½ generally trigger taxes plus a 10% penalty, so a SEP IRA is meant for long-term retirement saving, not a rainy-day fund.

Getting the deduction right depends on knowing your true net business income, which is one more reason clean books matter. Finlens keeps your books current so your net profit, the figure your maximum SEP contribution is based on, is accurate when you calculate it.

It also helps you set aside for estimated taxes alongside your retirement contributions.

Conclusion

A SEP IRA is one of the simplest ways for a self-employed person or small business owner to build retirement savings while cutting the year's tax bill. High limits, easy setup, and the flexibility to decide each year make it a natural fit for solo owners and freelancers.

Know its shape before you commit. For 2026 you can contribute up to 25% of compensation or $72,000, whichever is less, with the effective rate closer to 20% for the self-employed. And if you have employees, remember you must fund their accounts at the same rate as your own.

For most one-person businesses, the SEP IRA's combination of a high ceiling and near-zero hassle is hard to beat. Run your contribution off accurate net income, mind the annual limits, and it's a powerful, low-effort way to pay your future self first.

Frequently asked questions

What is a SEP IRA?

A SEP IRA, or Simplified Employee Pension IRA, is an employer-funded retirement plan for self-employed individuals and small businesses. The business contributes to traditional IRAs for the owner and eligible employees. It offers much higher contribution limits than a regular IRA with minimal setup and administration.

How much can you contribute to a SEP IRA in 2026?

For 2026, contributions are capped at the lesser of 25% of compensation or $72,000, up from $70,000 in 2025. For the self-employed, the effective limit is roughly 20% of net self-employment income because the contribution reduces the compensation figure it's based on. SEP IRAs don't allow catch-up contributions.

Who can open a SEP IRA?

Any business owner can open a SEP IRA, but it's most popular with self-employed individuals, freelancers, consultants, and small businesses. If you have eligible employees, you can still use a SEP IRA, but you must contribute the same percentage of compensation for each of them as you do for yourself.

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

A SEP IRA is employer-funded only and simpler to run. A Solo 401(k) combines an employee salary deferral with an employer contribution, allows catch-up contributions and Roth options, and often lets a solo owner contribute more at lower income levels. SEP wins on simplicity; Solo 401(k) wins on flexibility.

Are SEP IRA contributions tax-deductible?

Yes. Contributions the business makes to a SEP IRA are tax-deductible, reducing the business's taxable income for the year. The money grows tax-deferred, and you pay ordinary income tax when you withdraw in retirement. Early withdrawals before age 59½ generally face taxes plus a 10% penalty.

When is the deadline to set up and fund a SEP IRA?

You can set up and fund a SEP IRA up to your business's tax filing deadline, including extensions. This means you can open one after the calendar year ends and still make a contribution for the prior tax year, which is useful when finalizing your income at tax time.

Do I have to contribute to a SEP IRA every year?

No. SEP IRA contributions are discretionary. You decide each year whether to contribute and how much, within the limits. This flexibility makes it well suited to businesses with variable income, since you can contribute generously in strong years and skip or reduce contributions in lean ones.

Can I have a SEP IRA and a regular IRA?

Yes. A SEP IRA doesn't count against your personal traditional or Roth IRA contribution limit, so you can contribute to both in the same year. Your personal IRA contribution is separate from the employer contributions made to your SEP IRA, subject to the usual IRA rules and income limits.