Test age categories, contribution limits and payroll files for 2025. Keep the higher catch-up separate from the Roth requirement transition.
December 9, 2024 · Financial Forte Staff
Historical article: prepared retrospectively using information available as of December 9, 2024.
A new contribution limit is easy to announce and easier to implement incorrectly. For 2025, employers need payroll and retirement-plan systems to distinguish the regular employee limit, the ordinary age-50 catch-up and the higher catch-up for eligible employees ages 60 through 63. The separate Roth catch-up transition adds another date that communications must get right.
Confirm the plan's intended features, validate birth dates and test the limits before the first affected payroll. Treat the change as an administrative handoff among HR, payroll, the recordkeeper and the plan document provider. A vendor's software update does not by itself establish that your plan and employee elections are being administered correctly.
Build separate age and plan categories
The announced 2025 basic employee deferral limit for most 401(k), 403(b), governmental 457 plans and the federal Thrift Savings Plan is $23,500. The ordinary age-50 catch-up remains $7,500, while the higher amount for eligible participants attaining ages 60 through 63 during 2025 is $11,250.[1]
For a 401(k) that permits the feature, those figures produce a $31,000 combined amount for an ordinary age-50 catch-up participant and $34,750 for an eligible age-60-to-63 participant. They are not three amounts to add together. SIMPLE plans have their own limits and should not inherit this payroll configuration.[1]
Use the applicable year-end age rather than a single age snapshot taken during implementation. An employee turning 60 in the year and one turning 64 need different treatment. Validate missing or conflicting birth dates through the employer's appropriate process rather than filling them with an assumption.
Confirm the plan's provisions with its advisors and administrator before promising the higher amount. Also review how other special catch-up rules interact for a 403(b) or governmental 457 plan. A single universal payroll ceiling may be inadequate for an employer sponsoring multiple arrangements.
Test how the limit works over actual pay periods
Here is a payroll example using 24 regular paychecks in 2025. Employee A, who will turn 61, wants to contribute the full $34,750 and is assumed otherwise eligible. The average deduction would be approximately $1,447.92 per check, with a final adjustment for rounding and actual compensation.
Employee B, who will turn 64, is assumed eligible for the ordinary $31,000 combined limit instead. B would need approximately $1,291.67 over each of 24 checks, with a final rounding adjustment. Applying the $34,750 setting to B would allow $3,750 too much under these simplified facts. The difference is large enough that an age-category error should be caught before contributions begin.
Now suppose Employee A starts the election after four paychecks have already passed and made no earlier deferrals. Reaching the same annual target over the remaining 20 checks would require $1,737.50 per check. The higher amount still needs to fit eligible compensation, payroll constraints and the employee's election; software should not make an unauthorized increase to meet an annual goal.
Test bonus payroll, leave, changes in election and termination as well. Compare the year-to-date amount recorded by payroll with the recordkeeper's contribution data. A limit applied correctly in one system can still fail if another system receives an incomplete or incorrectly coded file.
Employees contributing elsewhere may need additional coordination. Give them a clear way to report relevant information and obtain plan-specific guidance. The employer's payroll system should not claim to know all personal contribution activity at unrelated employers.[2]
Keep the 2025 change separate from Roth implementation
Notice 2023-62 provides an administrative transition period through 2025 for the rule requiring Roth catch-up treatment for certain higher-wage participants. The higher age-60-to-63 catch-up can begin in 2025 without treating that separate Roth requirement as already mandatory under the transition.[2]
Prepare for the later requirement by identifying the data and processes that will be needed. The statutory framework refers to specified prior-year wages from the sponsoring employer, not simply household income or a rough salary estimate. Follow further guidance as it is issued instead of importing an unconfirmed interpretation into the payroll rules.
For 2025 communications, explain the actual pre-tax and Roth options offered by the plan. Do not tell every employee that reaching age 60 requires a Roth election. Equally, do not suggest that the transition removes the need to follow an employee's valid voluntary Roth election.
Have the same explanation reviewed across the benefits guide, enrollment portal and payroll help materials. Conflicting messages can produce unnecessary support calls and incorrect expectations even when the underlying system is configured properly.
Connect compliance controls with employee understanding
For an ERISA-covered plan, following the plan's terms and overseeing service-provider performance are part of responsible administration. Retain evidence of the decisions, the test results and who approved the setup. The employer should know how a mismatch will be detected and corrected.[3]
Monitor employees approaching their applicable ceiling and investigate unexpected contribution stoppages. An employee who planned to maximize savings may not notice a system stopping at the ordinary limit when the higher limit applies. Conversely, continued deductions beyond the applicable amount can create correction work.
Two useful measures are payroll-to-recordkeeper reconciliation differences and unresolved age or limit exceptions. Include the administrative effort and any effect of the actual matching formula in the benefit budget; do not assume catch-up deferrals always create an additional employer match. The change may improve a valued employee's opportunity to save, but it should not be described as a guaranteed retention result or an employer-funded benefit when the added contribution comes from salary.
Start with a small set of test employees covering employees who turn 49, 50, 60 and 64 during 2025, then verify the first live payroll and contribution file. Clear rules, accurate data and a working exception process make the new opportunity usable for employees while reducing preventable risk for the sponsor.
Related reading
Have more questions about retirement payroll controls and catch-up rules? Email Dave at dave@financialforte.com to discuss your questions and next steps.
The contact invitation is current; it does not imply this contact path existed on the historical reference date.
Educational information, not personalized investment, tax, legal or benefits advice. Examples use hypothetical assumptions. Verify current rules and your circumstances before acting.
