A SIMPLE IRA is a retirement plan authorized under Internal Revenue Code Section 408(p) designed for employers with 100 or fewer employees. It allows employees to defer compensation into individual retirement accounts while requiring the employer to make annual contributions. The structure emphasizes simplicity, cost control, and predictable compliance compared to traditional 401(k) plans.
What Is a SIMPLE IRA?
A SIMPLE IRA is available to employers with 100 or fewer employees who earned at least $5,000 in compensation in the preceding year. Eligible employees generally include those who earned at least $5,000 in any two prior years and are reasonably expected to earn that amount in the current year. Contributions are made to individual retirement accounts owned by the employee and held by a financial institution selected by the employer, with employees directing investments within the options offered by that custodian.
Key Plan Features and Characteristics
Employee contributions are made through salary deferrals up to the annual SIMPLE IRA limit established by the IRS. Contributions are generally pre-tax, though limited Roth options may be available depending on the custodian. Employer contributions are mandatory each year. Employers must either match employee contributions up to 3 percent of compensation or make a 2 percent nonelective contribution for all eligible employees regardless of participation.
Contribution Limits
SIMPLE IRAs have lower employee contribution limits than 401(k) plans. The employee deferral limit is fixed by law and cannot be increased by employer contributions. While employers are required to contribute each year, those contributions are made in addition to, not as an expansion of, the employee’s deferral limit. This structure reflects the SIMPLE IRA’s design goal of balancing meaningful retirement savings with lower administrative cost and simplified compliance.
Administrative Simplicity
SIMPLE IRAs are not subject to Form 5500 filing requirements and are exempt from nondiscrimination testing under ADP and ACP rules. Compliance obligations are minimal, and accounts are maintained at the individual employee level with investment choices provided by the custodian.
Custodian and Portability Rules
The employer selects the SIMPLE IRA custodian, and all payroll contributions must be deposited with that institution. Employees generally must use the employer’s selected custodian while employed. After an employee has participated in the SIMPLE IRA for two years, measured from the date of their first contribution, IRS restrictions on rollovers are lifted. At that point, employees may transfer or roll over SIMPLE IRA balances to another IRA or eligible plan, while new contributions continue to be deposited with the employer’s custodian.
Age-Related Rules
SIMPLE IRAs do not impose a minimum age requirement for participation beyond standard compensation and service rules. There is no upper age limit on making contributions as long as the employee has earned income. Required minimum distributions apply once the participant reaches the applicable statutory RMD age under federal law.
Cost Benefits Compared to a 401(k)
SIMPLE IRAs typically involve lower setup and ongoing costs. Employers avoid third-party administrator fees, annual testing costs, and complex plan corrections. Employer contribution costs are predictable and formula-based, reducing financial uncertainty and compliance risk.
Businesses That Benefit Most from a SIMPLE IRA
SIMPLE IRAs are well suited for professional service firms, medical and dental practices, consulting businesses, closely held operating companies, and startups with stable cash flow. They are most effective when the employer values simplicity, has a stable workforce, and wants to provide meaningful retirement benefits without administrative complexity.
SIMPLE IRA Versus 401(k)
A SIMPLE IRA prioritizes ease and cost efficiency, while a 401(k) offers higher contribution limits, flexible employer contributions, and advanced plan design options such as profit sharing and Roth features. Many businesses adopt a SIMPLE IRA in early growth stages and transition to a 401(k) as profitability and workforce complexity increase.
SECURE 2.0 Act Impact
The SECURE 2.0 Act, enacted December 29, 2022 as part of the Consolidated Appropriations Act, 2023, made broad changes to retirement plans. SIMPLE IRAs are not subject to the automatic enrollment requirements that apply to new 401(k) and 403(b) plans beginning in 2025. Contribution structures for SIMPLE IRAs remain unchanged.
The primary impact of SECURE 2.0 on SIMPLE IRAs relates to documentation. The IRS has extended deadlines for formal plan amendments while model language is finalized. As long as plans are operated in accordance with SECURE 2.0 requirements, amendments may be adopted retroactively without penalty.
Bottom Line. A SIMPLE IRA is a deliberate planning choice for small businesses seeking tax efficiency, employee value, and administrative ease. When properly aligned with the company’s size and growth stage, it delivers strong cost-benefit results while maintaining compliance with evolving IRS and Treasury guidance.