What Is a SEP IRA?
Self-employment comes with a lot of freedom and one glaring gap: no employer quietly setting up a retirement plan on your behalf. A SEP IRA exists to fill that gap.
The short answer
A SEP IRA, short for Simplified Employee Pension, is a retirement account designed for self-employed people and small business owners, including those with employees. The employer (which can just be one person running their own business) makes contributions directly into individual IRA-style accounts, and those contributions are generally tax-deductible for the business. It functions like a traditional IRA once the money is inside — it grows tax-deferred and is taxed as ordinary income when withdrawn in retirement.
How it works step by step
Setting up and using a SEP IRA follows a fairly linear process:
- A business owner opens the plan. This is typically done through a brokerage or financial institution, and the paperwork is usually much simpler than a traditional 401(k) plan.
- Contributions come only from the employer side. Unlike a workplace 401(k), employees don’t contribute their own salary into a SEP IRA — every dollar going in is an employer contribution, even for a self-employed person contributing to their own account.
- Contribution amounts are based on a percentage of income. The employer decides each year, within limits set by the government and changing over time, what percentage of eligible compensation to contribute, and that same percentage generally has to apply to every eligible employee, not just the owner.
- The money lands in individual IRAs. Each eligible participant gets their own SEP IRA account, which they own and control like any other IRA, even after leaving the business.
- Contributions can vary or pause year to year. There’s no fixed annual commitment — a business can contribute a larger percentage in a strong year and skip it entirely in a lean one.
Who it typically applies to
SEP IRAs are most common among freelancers, independent contractors, and small business owners who want a straightforward way to save for retirement without the administrative overhead of running a full 401(k) plan. The flexibility to adjust contributions based on how the business is doing makes it appealing for people with irregular income. It’s less useful for a business with many employees, since the requirement to contribute the same percentage for everyone can get expensive fast as headcount grows.
What it’s not
A SEP IRA isn’t a place for employees to defer their own salary the way they might with a 401(k), and it doesn’t have a Roth version — contributions go in pretax, and there’s no after-tax equivalent within the SEP structure itself. It also isn’t designed for catch-up contributions the way some other plans are structured. People sometimes confuse it with a SIMPLE IRA, which is a different small-business plan that does allow employee salary deferrals.
Weighing it against other options
Choosing a SEP IRA usually comes down to comparing it with a solo 401(k) or a SIMPLE IRA for a small operation, weighing administrative simplicity against contribution flexibility and how many people the business employs. For a single self-employed person with variable income, the ability to contribute a large percentage in good years and little in slow ones is often the main draw.
The bottom line
A SEP IRA gives self-employed people and small business owners a simple, flexible way to build retirement savings without payroll-style deferrals or heavy paperwork. It works well for solo operators and small teams, but the requirement to contribute equally across employees means it’s worth weighing carefully once a business starts to grow.