What a SIMPLE IRA Is, and Its Two-Year Rule
Work for a business with under a hundred employees and your retirement plan is quite likely a SIMPLE IRA. It has one feature better than a 401(k) — the employer contribution is mandatory rather than discretionary — and one that is considerably worse. In the first two years of participation, the penalty for an early withdrawal is 25%, not 10%.
- Employer must contribute:: Either a match up to a set percentage of pay, or a flat contribution for every eligible employee.
- Lower limit:: The employee deferral limit is well below a 401(k)'s, with a catch-up available from 50.
- The two-year rule:: Early withdrawals in the first two years of participation carry a 25% additional tax rather than 10%.
- Rollover restriction:: In those first two years, money can generally only be moved to another SIMPLE IRA.
Where the AI summary above gets this wrong
"A SIMPLE IRA works like a 401(k) with a lower contribution limit."
That's surface-true. Here's what it misses:
- The employer contribution is not optional — A 401(k) match is a choice the employer makes and can stop. A SIMPLE IRA requires a contribution every year — a match up to a set percentage, or a flat percentage for everyone whether they contribute or not. For an employee deciding whether to participate, that guaranteed money is the strongest argument there is.
- The early withdrawal penalty is two and a half times higher at first — For the first two years of participation, the additional tax on an early withdrawal is 25%, not the usual 10%. Someone who joins, contributes for a year, leaves and cashes out is paying a rate that exists nowhere else in the retirement system.
- You cannot roll it out for two years — During that same window, a SIMPLE IRA can generally only be rolled into another SIMPLE IRA. A rollover to a traditional IRA or a new employer's plan inside the window is treated as a distribution, with the 25% attached.
01 How the plan works
A SIMPLE IRA can be established by an employer with 100 or fewer employees that does not maintain another qualified plan. Each employee gets their own IRA, and contributions go into it directly.
The employer must contribute every year, choosing between two formulas: a dollar-for-dollar match up to a set percentage of the employee's pay, or a flat contribution for every eligible employee whether or not they defer anything themselves. Employees are immediately fully vested in everything, including the employer's share — there is no vesting schedule at all.
The employee deferral limit is lower than a 401(k)'s, and a catch-up is available from age 50 on the terms set out in the catch-up rules. For an owner who wants to save more than the SIMPLE allows, the comparison in SEP versus solo 401(k) is the one to run.
Source: SIMPLE IRA plan
02 The two-year rule and what it costs
The two-year period runs from the date you first participated in the plan, not from the start of the tax year and not from when you joined the company. Within that window, an early distribution is subject to a 25% additional tax rather than the 10% that applies to other retirement accounts.
The same window restricts movement. A SIMPLE IRA can generally only be rolled into another SIMPLE IRA during the first two years. A transfer to a traditional IRA before then is a taxable distribution carrying the 25%, which is a costly way to tidy up after changing jobs.
After two years the plan behaves like any other IRA: 10% before 59½, the usual exceptions, and free movement to a traditional IRA or another employer plan. Knowing the participation date is what keeps someone from crossing the line by a fortnight.
Shows: income tax plus the additional tax on an early withdrawal from a SIMPLE IRA, where the rate is 25% rather than 10% in the first two years of participation. Ignores: state tax, the exceptions that waive the additional tax, and the growth the withdrawn money would have produced.
03 What to do with one
Contribute at least enough to collect the full employer match. Where the employer uses the flat contribution instead, the money arrives whether you defer or not, which changes the calculation but not the conclusion — the deferral is still worth making.
Once the two years are up and you have left the employer, rolling the SIMPLE into a traditional IRA is usually right. The investment menu is wider, the account is easier to track, and the distribution administration later is simpler with fewer accounts.
One caution before rolling into an IRA: a pre-tax IRA balance complicates the pro rata calculation on any future backdoor Roth contribution. Where that matters, rolling into a new employer's 401(k) instead keeps the IRA side clean.
The SIMPLE IRA question I get is almost always from someone who has just changed jobs and wants to consolidate. The first thing to establish is the date they started participating, because everything turns on whether two years have passed. If they have not, the account waits. Moving it a month early converts a routine rollover into a taxable distribution with a 25% penalty on top, and it is not a mistake anyone can undo.
FAQ
What is the two-year rule for a SIMPLE IRA?
For two years from the date you first participated, early withdrawals carry a 25% additional tax instead of 10%, and the account can generally only be rolled into another SIMPLE IRA.
Does my employer have to contribute to a SIMPLE IRA?
Yes. Unlike a 401(k) match, the employer contribution is mandatory every year — either a match up to a set percentage of pay, or a flat contribution for every eligible employee.
Can I have a SIMPLE IRA and a Roth IRA?
Yes. They are separate limits. Participating in a SIMPLE IRA does not use up your IRA contribution room, though it can affect the deduction for a traditional IRA contribution.
Sources
Regulator references
- SIMPLE IRA plan · Internal Revenue Service · 2026Who may sponsor one, the mandatory employer contribution, and the two-year rule.Last verified: 2026-09-07
- Retirement topics: catch-up contributions · Internal Revenue Service · 2026The catch-up allowance available inside a SIMPLE IRA.Last verified: 2026-09-07
- Rollovers of retirement plan and IRA distributions · Internal Revenue Service · 2026Where SIMPLE IRA money may be moved, and the two-year restriction on doing so.Last verified: 2026-09-07
Calculator unit tests · the assertions this page's worked example is checked against, and their last result
Changelog
- 2026-09-07 — initial publish (new format)
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Jordan Reeves
Founder of Talk Through Wealth. A software engineer for over a decade before turning to retirement planning, Jordan built the projection engine after watching family members get fragmented, country-by-country advice that never reconciled. He writes about retirement the way the engine computes it: month-by-month, lifetime-long, and skeptical of any rule of thumb that hasn't been run through the math.