A payroll manager at a 22-person marketing agency sets up 2026 SIMPLE IRA deferrals using last year's numbers. She caps employee contributions at $17,600 — the figure she remembers from 2025. Except that's not this year's limit, and it's not even the right tier. Her company qualifies for the enhanced small-employer limit, which jumped to $18,100 for 2026. Meanwhile, a similar-sized company down the street that added a 26th employee in March is stuck on the standard track, capped at $17,000. Same industry, similar headcount, different rules — and neither owner asked for this level of complexity in what's supposed to be the "simple" retirement plan.
That's the state of SIMPLE IRAs in 2026. What used to be a single number every small business could memorize is now a branching set of thresholds that depend on your headcount, your plan design choices, and your employees' exact ages. Get it wrong, and you're either shortchanging employees on a matching contribution or setting up an excess-deferral problem that takes months to unwind.
The Two Tracks, Side by Side
Every SIMPLE IRA plan now falls into one of two limit tracks:
The standard track applies to employers who don't use the enhanced contribution formula, and to employers with more than 100 employees. For 2026, the standard employee elective deferral limit is $17,000.
The enhanced track — created by SECURE 2.0 — applies automatically to employers with 25 or fewer employees, and optionally to employers with 26 to 100 employees who choose to raise their required company contribution. On this track, the 2026 elective deferral limit is $18,100, which is 110% of the standard figure.
Here's the part that trips people up: the 110% bump isn't a flat, easy-to-remember premium. It's a separate, independently rounded inflation adjustment, which means the two tracks don't always move in lockstep from year to year — and that mismatch shows up most clearly in the catch-up numbers.
Why the Catch-Up Limit Actually Goes Down on the Enhanced Track
This is the detail that catches even experienced bookkeepers off guard. For employees age 50 to 59 (and those 64 and older), the standard catch-up contribution for 2026 is $4,000. You'd expect the enhanced-track version to be 10% higher — somewhere around $4,400.
It isn't. The enhanced-track catch-up for 2026 is $3,850 — nearly $150 lower than the standard catch-up, despite sitting on the "enhanced" track. This isn't a typo or a plan-design penalty; it's a quirk of how the two limits get inflation-adjusted and rounded independently under the statute, and advisors who track SECURE 2.0 implementation have flagged it as a result the law's drafters almost certainly never intended. But quirk or not, it's the number on the books for 2026, and payroll software that just multiplies by 1.1 will get it wrong.
Putting the full picture together for 2026:
| Employee situation | Standard track | Enhanced track (≤25 employees, or 26–100 electing higher match) |
|---|---|---|
| Under age 50 | $17,000 | $18,100 |
| Age 50–59 or 64+ (with catch-up) | $21,000 | $21,950 |
| Age 60–63 (super catch-up) | $22,250 | $23,350 |
The age 60–63 "super catch-up" — a flat $5,250 for 2026 — is the one number that doesn't change between tracks. It was built into SECURE 2.0 as a fixed dollar figure rather than a percentage-linked one, so it applies the same way regardless of which track your plan sits on.
How Employers Get Onto the Enhanced Track
If you have 25 or fewer employees, you're automatically eligible for the enhanced limits — no extra election or paperwork beyond adopting the SIMPLE IRA plan itself, provided your employees earned at least $5,000 in the prior year.
If you have between 26 and 100 employees, you have to opt in by increasing your required company contribution:
- Matching contributions: instead of the standard dollar-for-dollar match up to 3% of compensation, you commit to matching up to 4%.
- Nonelective contributions: instead of the standard flat 2% of compensation to every eligible employee, you commit to 3%.
In both cases, that higher company contribution is what unlocks the $18,100 deferral ceiling for your employees. There's no version where you get the higher employee limit without also raising what the business contributes — the enhanced track is a package deal, not a standalone election.
For 2026, compensation counted toward the nonelective calculation is capped at $360,000 per employee, and employers using the standard 3% match formula can temporarily reduce it to as low as 1% in no more than two of any five consecutive years — a flexibility valve worth remembering if a rough year makes the full match temporarily unaffordable.
The Deadline That Doesn't Move
Regardless of which track a plan is on, deposit timing rules stay the same: employee salary reduction contributions must hit the SIMPLE IRA within 30 days after the end of the month they were withheld — a noticeably tighter window than the "reasonably promptly" standard that applies to some other plan types. Employer matching or nonelective contributions have more breathing room, due by the business's federal tax filing deadline, including extensions.
Late employee deposits are treated as a prohibited transaction by the Department of Labor, which can trigger excise taxes and require the employer to make the plan whole with lost earnings. It's a small compliance detail with outsized consequences if payroll and plan administration aren't talking to each other.
What to Actually Do About This
If you run payroll for a small business with a SIMPLE IRA, four things are worth doing before your next pay cycle:
- Confirm your track. Count eligible employees as of today, not as of when you set up the plan. Headcount changes can shift which limit applies.
- Update payroll system defaults. Don't assume last year's dollar figure just needs a generic COLA bump — confirm the exact 2026 number for your specific track and, for eligible employees, their specific age bracket.
- Flag employees turning 60–63 during 2026. They're entitled to the $5,250 super catch-up regardless of which track the plan sits on, and it's easy to miss if your system only checks for "age 50+."
- Watch for excess deferrals. An employee who contributed to a SIMPLE IRA at one employer and a 401(k) at another during the same year is still bound by the aggregate personal limit across all plans — a separate ceiling from any single plan's cap.
Why Precise Books Make This Easier
None of this is manageable from memory, and it's not really a payroll-software problem either — it's a records problem. Knowing exactly how many eligible employees you have, what compensation each one earned, and which contribution formula you've committed to is the same discipline that keeps a business audit-ready for far more than retirement plan compliance. A business that can produce an accurate headcount and compensation report in minutes, rather than reconstructing it from scattered spreadsheets, is a business that catches a track-eligibility change before it becomes a correction filing.
Keep Your Financial Records Precise Year-Round
Contribution limits like these are exactly the kind of detail that's easy to get right once and then quietly get wrong the following year as thresholds shift. Beancount.io provides plain-text accounting that gives you a transparent, version-controlled history of every payroll and benefits transaction, so the numbers behind decisions like these are always accurate and just a query away. Get started for free and keep your books ready for whatever the next COLA adjustment brings.