Calculator Inputs
Enter your income, age, current contributions, payroll timing, and employer match details.
Example Data Table
| Scenario | Age | Compensation | YTD Deferral | Year | Possible Employee Maximum |
|---|---|---|---|---|---|
| Standard saver | 42 | $120,000 | $8,000 | 2026 | $24,500 |
| Regular catch-up saver | 55 | $150,000 | $18,000 | 2026 | $32,500 |
| Higher catch-up saver | 62 | $180,000 | $20,000 | 2026 | $35,750 |
Formula Used
Employee maximum: min(annual compensation, plan employee cap, base deferral limit + eligible catch-up limit)
Remaining contribution: max(0, employee maximum - year-to-date employee deferrals)
Recommended per paycheck: remaining contribution / pay periods remaining
Required election percentage: remaining contribution / remaining eligible pay × 100
Estimated employer match: min(employee maximum, compensation × match cap %) × match rate %
Annual additions used: regular employee deferrals + employer contributions + after-tax non-Roth contributions
Catch-up contributions are shown separately because they are not counted against the regular annual additions cap.
How to Use This Calculator
- Select the contribution year or choose custom limits.
- Enter your age at the end of the calendar year.
- Add your estimated eligible compensation for the year.
- Enter pre-tax, Roth, and after-tax contributions already made.
- Add employer match and other employer contributions already posted.
- Enter remaining pay periods and any expected eligible bonus.
- Add the employer match formula used by your plan.
- Press calculate to see your limit, gap, match, and paycheck target.
- Use CSV or PDF buttons to save the result.
Plan Better With a 401k Maximum Estimate
Why the Maximum Matters
A 401k limit looks simple at first. Yet real payroll planning is often more detailed. Age, plan rules, employer match, Roth options, and remaining paychecks can change the answer. This calculator combines those items in one place. It helps you estimate the largest employee salary deferral you can still make. It also shows whether the goal is practical before the last payroll date.
Catch-Up Rules Need Care
Workers age 50 or older may qualify for extra catch-up space. Some workers age 60 through 63 may qualify for a higher catch-up amount. The tool checks age, plan permission, and the selected annual limit. It also flags Roth catch-up concerns for higher earners when the rule year supports that requirement. This helps users avoid assuming every plan works the same way.
Payroll Timing Is Important
The annual limit is only useful when payroll can still process it. A person may have a large remaining limit but too few paychecks left. The calculator divides the remaining gap by the number of remaining pay periods. It also estimates the election percentage needed against remaining eligible pay. This gives a practical payroll target instead of only an annual total.
Employer Match and Annual Additions
Employee deferrals are not the only plan contribution. Employer match, nonelective deposits, and after-tax contributions can affect the overall account limit. The calculator estimates match using a match rate and compensation cap. It then compares regular annual additions against the plan-level cap. Catch-up dollars are separated because they receive different treatment.
Use the Result as a Planning Guide
The result is useful for budgeting and payroll review. It can show a shortfall, excess deferral risk, or possible after-tax contribution room. Still, plan documents control the final answer. Payroll systems may also apply separate rules. Review the output with your employer, plan provider, or tax professional before making large changes.
FAQs
1. What does this calculator estimate?
It estimates your maximum employee deferral, remaining yearly room, per-paycheck target, employer match, and annual additions position.
2. Does the result include employer match?
Yes. The summary includes estimated employer match, but the employee maximum is shown separately from employer deposits.
3. Are Roth and pre-tax contributions combined?
Yes. Roth and pre-tax employee salary deferrals share the same employee deferral limit for the year.
4. What is catch-up contribution space?
It is extra salary deferral room for eligible older workers when the plan permits catch-up contributions.
5. Why does the calculator ask for remaining pay periods?
It uses remaining pay periods to estimate the contribution amount needed from each future paycheck.
6. What does annual additions mean?
Annual additions generally include regular employee deferrals, employer contributions, forfeiture allocations, and after-tax non-Roth deposits.
7. Can this calculator handle custom plan limits?
Yes. Choose custom limits and enter your plan or future-year values in the override fields.
8. Should I rely on this for tax filing?
No. Use it for planning. Confirm final limits with payroll, your plan administrator, or a qualified tax professional.