A SIMPLE IRA (Savings Incentive Match Plan for Employees) is a retirement plan designed for small businesses with 100 or fewer employees. It gives small business owners an easy, low-cost way to offer a retirement benefit, and it gives employees a tax-advantaged way to save for retirement.
How a SIMPLE IRA Works
A SIMPLE IRA works similarly to a 401(k). Employees contribute a percentage of their paycheck on a pre-tax basis, reducing their taxable income. Employers are required to make contributions as well. The money grows tax-deferred until withdrawn in retirement, when it is taxed as ordinary income.
SIMPLE IRA Contribution Limits for 2026
- Employee contribution limit: $16,500
- Catch-up contribution (age 50–59 or 64+): Additional $3,500
- Catch-up contribution (age 60–63): Additional $5,250 (higher limit under SECURE 2.0)
These limits are lower than a 401(k)’s $23,500 limit, which is one of the SIMPLE IRA’s main drawbacks.
Employer Contribution Requirements
Unlike a 401(k), employer contributions to a SIMPLE IRA are mandatory. Employers must choose one of two options:
- Matching contribution: Match employee contributions dollar-for-dollar up to 3% of the employee’s compensation. Employers can reduce this to 1% in two out of five years.
- Non-elective contribution: Contribute 2% of each eligible employee’s compensation, regardless of whether the employee contributes.
Who Can Offer a SIMPLE IRA?
Any business with 100 or fewer employees who earned at least $5,000 in compensation in the preceding year can establish a SIMPLE IRA — as long as the employer does not currently maintain another qualified retirement plan. Self-employed individuals (sole proprietors, partners) can also set up and contribute to a SIMPLE IRA.
Vesting Rules
SIMPLE IRA contributions are immediately 100% vested. Employees own all employer contributions the moment they are made. This is a significant advantage over many 401(k) plans, where employer contributions vest on a schedule over several years.
SIMPLE IRA Withdrawal Rules
Withdrawals before age 59.5 are subject to a 10% penalty — but there is an important exception. If you withdraw within the first two years of participating in a SIMPLE IRA, the early withdrawal penalty jumps to 25%, not 10%. After two years, the standard 10% early withdrawal penalty applies, same as a traditional IRA or 401(k).
SIMPLE IRA vs. 401(k): Key Differences
| Feature | SIMPLE IRA | 401(k) |
|---|---|---|
| Employee limit | 100 or fewer | Any size |
| 2026 employee contribution limit | $16,500 | $23,500 |
| Employer contributions | Required | Optional |
| Vesting | Immediate | Can be on a schedule |
| Setup cost | Low | Higher (plan documents, testing) |
| Loans | Not allowed | Allowed (up to plan rules) |
SIMPLE IRA vs. SEP-IRA
A SEP-IRA is another option for small businesses. Key differences:
- SEP-IRA allows higher contributions (up to 25% of compensation, max $70,000 in 2026)
- SEP-IRA only requires employer contributions — employees cannot contribute their own salary
- SIMPLE IRA allows both employee salary deferrals and employer matching
If you want employees to contribute their own money to their retirement, a SIMPLE IRA is the better fit. If you want a plan where only the employer contributes, a SEP-IRA may be simpler.
How to Set Up a SIMPLE IRA
Setting up a SIMPLE IRA requires minimal paperwork compared to a 401(k):
- Choose a financial institution to serve as trustee (a brokerage or bank)
- Complete IRS Form 5304-SIMPLE or 5305-SIMPLE
- Provide employees with required notices and summary plan descriptions
- Set up individual IRA accounts for each participating employee
There are no annual IRS filings required (no Form 5500), which reduces ongoing administrative burden.
Bottom Line
A SIMPLE IRA is an accessible, low-cost retirement plan for small businesses. If you own a small business and want to offer employees a retirement benefit without the complexity and cost of a 401(k), a SIMPLE IRA is worth considering. The mandatory employer contribution is a real cost, but immediate vesting and minimal administration make it an attractive option for lean operations.