What it means
The plan is open to employers with 100 or fewer employees who do not maintain another qualifying retirement plan. Each participating employee holds an individual retirement account in their own name, and the employer sends contributions directly into it.
Employer contributions are mandatory, not optional, and the business chooses between two routes each year. The matching route means matching employee deferrals dollar for dollar up to 3% of that person's pay; the non-elective route means contributing 2% of pay for every eligible employee whether or not they contribute anything themselves.
The appeal for a small employer is administrative. There is no annual discrimination testing, no Form 5500 filing in most cases, and set-up typically involves a single form with a provider rather than a formal plan document drafted by a specialist.
The cost of that simplicity is capacity. Employee deferral limits are meaningfully lower than under a 401(k), so a business owner who wants to shelter a large share of their own income will eventually outgrow the structure.
Vesting works differently too. All contributions, including the employer's, are immediately 100% owned by the employee, which is generous compared with 401(k) plans that can impose vesting schedules of several years.
Early withdrawal rules deserve attention. Money taken out before age 59 and a half generally attracts an additional tax penalty, and within the first two years of participation that penalty is set at a higher rate than for other individual retirement accounts, which discourages using the plan as a short-term savings pot.
In practice
Real-world examples.
Example
A 14-person dental practice sets up a SIMPLE IRA with 3% matching. Nine staff enrol, deferring an average of $4,000 each, and the practice's total employer cost for the year comes to roughly $11,000, which it treats as a deductible business expense.
Example
A landscaping firm with heavy seasonal turnover chooses the 2% non-elective route so that every eligible worker receives something regardless of participation. On a $900,000 eligible payroll the employer contribution is $18,000, and management values the predictability for budgeting.
Example
A consultancy owner who has been paying herself $150,000 realises she cannot shelter enough income through the SIMPLE IRA's deferral cap. She keeps the plan for two more years while the team grows, then converts the business to a 401(k) with profit sharing to raise the ceiling.
Think of it
“SIMPLE IRA is an easy retirement plan for small businesses-simpler than 401(k).
Formula
Calculation
The employer match calculation is:
Employer match = min(employee deferral, 3% x employee compensation)
Consider an employee earning $60,000 a year who elects to defer 10% of pay. Her own contribution is $60,000 x 0.10 = $6,000. The employer has chosen the matching route, so it contributes 3% of her salary: $60,000 x 0.03 = $1,800, because her $6,000 deferral comfortably exceeds that cap. Total going into her account for the year is $6,000 + $1,800 = $7,800, of which she owns 100% immediately.
Had the employer chosen the 2% non-elective route instead, it would have paid $60,000 x 0.02 = $1,200 into her account, and crucially would have paid the same 2% into the accounts of colleagues who contributed nothing at all. For a workforce where few people participate, the matching route is usually cheaper; where participation is high, the 2% route can cost less.Case study
Seen in the real world.
This example is illustrative and Kestrel Bindery is a fictional company. The 22-person book bindery had never offered retirement benefits, and two skilled machine operators left in one year citing benefits at a larger competitor.
The owner priced a 401(k) and balked at the administration: annual testing, a third-party administrator, an audit threshold looming as headcount grew. A SIMPLE IRA with 3% matching was set up instead in about three weeks. On a $1.1 million eligible payroll, the finance manager modelled a worst case where every employee deferred at least 3%, giving a maximum employer cost of $1,100,000 x 0.03 = $33,000.
Actual take-up in year one was 15 of 22 staff, and the real employer cost came in at $21,400. Kestrel published that number internally alongside the message that every dollar was immediately and permanently the employee's own. Turnover among machine operators fell the following year, and the illustrative point is that the plan's simplicity, not its generosity, is what made the decision possible for a business this size.
Watch out
Common mistakes.
- Assuming employer contributions are optional. A SIMPLE IRA legally requires either the match or the flat non-elective contribution every year the plan operates.
- Running a SIMPLE IRA alongside another retirement plan. With narrow exceptions, an employer may not maintain a second qualifying plan in the same year the SIMPLE IRA receives contributions.
- Treating early withdrawals like any other individual retirement account. Taking money out within the first two years of participation triggers a higher additional tax than the standard early-withdrawal penalty.
Questions
People also ask.
Who can set up a SIMPLE IRA?
An employer with 100 or fewer employees who earned at least $5,000 in the prior year, provided no other qualifying retirement plan is maintained for the same period.
Which is cheaper for the employer, the match or the 2% contribution?
It depends on take-up, because the match only costs money when employees contribute, whereas the 2% route pays everyone eligible regardless of participation.
Can employees roll a SIMPLE IRA into a 401(k) later?
Yes, once the two-year participation period has passed, balances can generally be rolled into another eligible retirement plan without triggering tax.
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