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SEP Versus SIMPLE Plans: Which Plan Fits Best?
Aug 30, 2026 | Read time: 6 minutes
Retirement plan options for small business owners
When it comes to choosing a retirement plan for your small business, two popular options often rise to the top: the Simplified Employee Pension (SEP) IRA and the Savings Incentive Match Plan for Employees (SIMPLE) IRA. Both are IRA-based retirement plans that offer a simpler alternative to a traditional 401(k), but they differ significantly in how contributions work, who can contribute, and the level of flexibility they provide.
Understanding these differences can help business owners choose the plan that aligns with their goals, workforce size, and cash flow while maximizing retirement savings opportunities.
SEP IRA: Employer-funded flexibility with higher contribution potential
A SEP IRA is funded entirely by the employer. Unlike a SIMPLE IRA, employees generally cannot make salary deferral contributions to the plan. Instead, the employer decides each year whether to contribute and how much to contribute.
One of the most appealing aspects of a SEP IRA is flexibility. Contributions are discretionary, meaning an employer can contribute one year and skip contributions the next if business conditions change.
For the 2026 tax year, employer contributions can be as much as the lesser of:
- 25% of an employee's compensation, or
- $72,000.
Contributions are calculated using compensation up to $360,000.
When contributions are made, employers generally must contribute the same percentage of compensation for every eligible employee. SEP IRAs do not allow catch-up contributions, regardless of participant age.
Because of their high contribution limits and year-to-year flexibility, SEP IRAs are especially attractive for self-employed individuals, owner-only businesses, and companies with variable income. However, once a business begins hiring non-family employees, the cost of making equal percentage contributions for all eligible workers can become more significant.
SIMPLE IRA: Shared responsibility between employers and employees
A SIMPLE IRA combines employee salary deferrals with required employer contributions. In many ways, it functions as a streamlined version of a 401(k), giving employees the ability to actively contribute toward their retirement while requiring employer participation.
For 2026, employee contribution limits are:
- Standard employee deferral limit: $17,000
- Increased employee deferral limit for employers with 25 or fewer employees, or larger employers that adopt an enhanced match: $18,100
- Standard catch-up contribution for individuals ages 50 to 59 and age 64 and older: $4,000
- Enhanced catch-up contribution for individuals ages 60 to 63: $5,250
Employers must choose one of two contribution methods:
- Match employee salary deferrals dollar-for-dollar up to 3% of compensation (with limited ability to reduce the match to as low as 1% in certain years), or
- Make a 2% nonelective contribution for all eligible employees, regardless of whether they contribute to the plan.
Unlike SEP IRAs, employer contributions are not optional. This requirement can make retirement savings more predictable for employees while helping employers foster a stronger workplace benefits package.
Although SIMPLE IRAs remain relatively easy to administer, they typically involve more oversight than SEP IRAs. Employers must track employee deferral elections, process payroll contributions, fund employer contributions, and distribute annual notices describing plan provisions.
Side-by-side comparison
| Feature | SEP IRA | SIMPLE IRA |
|---|---|---|
| Who contributes? | Employer only | Employee deferrals and required employer contribution |
| 2026 contribution limit: | Lesser of 25% of compensation or $72,000 | $17,000 ($18,100 for eligible small employers) plus employer portion |
| Catch-up contributions: | Not permitted | $4,000 (ages 50–59, 64+); $5,250 (ages 60–63) |
| Employer contribution required annually? | No–discretionary each year | Yes–match or nonelective contribution required |
| Best business fit: | Business with few (or no) employees; variable income | Business seeking lower cost by shifting contributions to employees |
| Administrative burden: | Low | Low, but more significant than SEP |
For an owner-only business or a company with unpredictable earnings, a SEP IRA often provides valuable flexibility and higher potential contribution limits. For businesses that want employees to actively save for retirement while sharing contribution responsibility, a SIMPLE IRA may be a more practical solution.
Deadlines for establishing a plan
The timing requirements for these retirement plans differ substantially, which can influence your decision.
SEP IRA deadlines
A SEP IRA can generally be established as late as the employer's tax filing deadline, including extensions. For calendar-year businesses that file an extension, that often means the plan can be established and funded as late as October 15 of the following year for the prior tax year.
This flexibility gives business owners additional time to evaluate profitability and determine an appropriate contribution amount before making a commitment.
SIMPLE IRA deadlines
A SIMPLE IRA generally must be established by October 1 of the year in which it will become effective.
Because employees need adequate time to make salary deferral elections, SIMPLE IRAs operate on a calendar-year basis. Employers must also provide required annual notices, including information about the contribution formula, by November 1 for the upcoming year.
As a result, SIMPLE IRAs require more advance planning than SEP IRAs.
Discover how different IRA options can support your small business and retirement goals. Download our free guide,
Which IRA Is Right for You?, to learn more about SDIRAs, SEP IRAs, and SIMPLE IRAs.
The bottom line
Both SEP IRA and the SIMPLE IRA offer straightforward, cost-effective retirement solutions for small businesses. The best choice depends on several factors, including the size of your workforce, the stability of your cash flow, your retirement savings goals, and whether you want employees to contribute directly to the plan.
A SEP IRA may be a strong fit for business owners seeking maximum flexibility and higher contribution potential, especially when employee headcount is limited. A SIMPLE IRA may be better suited for businesses that want to encourage employee retirement savings while maintaining a relatively simple and affordable plan structure.
While STRATA's experts can help guide you through the account setup process, business owners should work with qualified tax, financial, and legal professionals to determine which plan best aligns with their unique business objectives and long-term retirement goals.
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