IRS Benefit Plan Limits, Annually
Contribution limits for 401(k)s, HSAs and FSAs change on an annual cycle, announced late in the prior year. Payroll systems need the new figures loaded before the first run of January, or deductions silently carry the old caps.
The annual cycle
The IRS announces retirement plan limits in the final months of the year, with health account limits published alongside. Employer payroll and benefits platforms then push updates, usually landing in December or early January.
| Account | Whose limit | Typical update point |
|---|---|---|
| 401(k) elective deferral | Employee, per year | First January payroll |
| Catch-up (age 50+) | Employee, per year | First January payroll |
| HSA | Employee plus employer funding | Plan-year start |
| Health FSA | Election at enrolment | Open enrolment |
Where it breaks
Mid-year hires near the cap. Someone joining in October with a high salary can hit the annual limit inside weeks; the system needs to true-up rather than hard-stop incorrectly.
Employer match interactions. Match counts toward some limits but not others. When limits rise mid-cycle because of corrections, matching formulas recalculate too.
Multiple employers. Limits apply across employers for the individual, not per employer. Two jobs means coordination no payroll system sees.
Running plans through a PEO moves the loading onto their calendar; see 401(k) administration under a PEO.
Next
Frequently asked
When are new limits announced?
Retirement plan limits are typically announced in autumn for the following year; HSA figures follow a similar cycle.
Do catch-up contributions count toward the main limit?
No. Catch-up eligibility starts at age fifty and sits on top of the standard elective deferral limit.
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