Calculator inputs
This page uses a single-column structure, while the input grid shifts to three columns on large screens, two on smaller screens, and one on mobile.
Formula used
This calculator combines employee limits, catch-up eligibility, employer match logic, compensation caps, employer caps, and the combined annual additions ceiling.
| Metric | Formula |
|---|---|
| Compensation used | min(Annual compensation, Compensation cap) |
| Total employee limit | Employee annual limit + Catch-up limit, when age qualifies |
| Projected employee total | min(Total employee limit, YTD employee + Per-pay amount × Remaining periods) |
| Employer match total | min(Projected employee total, Compensation used × Match cap %) × Match rate |
| Employer plan cap | Compensation used × Employer total cap % |
| Regular employee amount for combined cap | min(Projected employee total, Employee annual limit) |
| Maximum employer via combined cap | Combined annual additions limit − Regular employee amount |
| Projected employer after caps | min(Projected employer before caps, Employer plan cap, Maximum employer via combined cap) |
Catch-up contributions are displayed separately and are not added to the combined cap calculation inside this model.
How to use this calculator
- Enter the plan name, employee age, compensation, and any compensation ceiling your plan uses.
- Add the regular employee annual limit and the catch-up rules that apply to the employee.
- Enter current year-to-date employee and employer contributions before forecasting future payroll activity.
- Set the planned employee contribution per pay period and the number of periods remaining.
- Enter employer match settings, other employer contributions, employer caps, and the combined annual additions limit.
- Click the button to project year-end totals, remaining room, capped values, and safer per-pay pacing.
Example data table
| Scenario | Age | Compensation | Employee Limit | Catch-up | YTD Employee | Per Pay | Periods Left | Projected Employer After Cap |
|---|---|---|---|---|---|---|---|---|
| Midyear review | 45 | $92,000 | $23,000 | $0 | $9,000 | $650 | 10 | $5,260 |
| Catch-up eligible | 54 | $138,000 | $23,000 | $7,500 | $16,500 | $900 | 12 | $8,140 |
| Employer cap watch | 38 | $70,000 | $23,000 | $0 | $12,000 | $800 | 8 | $4,500 |
FAQs
1. What does this calculator estimate?
It projects employee contributions, employer match, other employer funding, combined annual additions, and the remaining room still available before caps are reached.
2. Why is catch-up shown separately?
Many benefit plans track catch-up amounts outside the regular employee contribution ceiling. Showing them separately makes year-end limit monitoring easier and cleaner.
3. Can I use custom plan rules?
Yes. Every major cap is user-entered, so HR teams can model internal plan rules, negotiated caps, or country-specific policies without changing code.
4. What is the safe per-pay amount?
It divides the remaining employee room by the remaining payroll periods. That estimate helps avoid overshooting the annual employee contribution ceiling.
5. Does the employer match replace manual employer entries?
No. The formula estimates match totals, while separate fields capture other employer funding such as nonelective or discretionary contributions.
6. Why can the employer total get capped?
The calculator checks the projected employer total against the employer percentage cap and the combined annual additions ceiling, then keeps the projection within both.
7. Is this legal or tax advice?
No. It is a planning and review tool. Always confirm statutory limits, plan documents, and payroll treatment with qualified advisors.
8. What should HR review before finalizing payroll elections?
Check compensation definitions, age eligibility, payroll calendar timing, matching formulas, plan amendments, and any limits that differ from standard defaults.