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Business taxation

How much can a greater than 2% S Corporation shareholder employee aged 50 contribute in total to a 401(k) plan in 2025, including both employer and employee contributions?

Last updated: 
Sep 2025
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Answer

For a greater than 2% S Corporation shareholder-employee aged 50 in 2025, the total amount that can be contributed to a 401(k) plan—including both employee elective deferrals and employer contributions—is governed by several key limits set by the Internal Revenue Code and IRS guidance. Here’s a detailed breakdown:

1. Employee Elective Deferral Limit (401(k) Salary Deferral)

  • For 2025, the maximum elective deferral an employee can make to a 401(k) plan is $23,500.
  • Because the individual is age 50 or older, they are eligible for a catch-up contribution of $7,500.
  • Therefore, the total possible employee elective deferral (including catch-up) is $31,000 ($23,500 + $7,500).

2. Employer Contribution Limit (Profit Sharing/Nonelective)

  • The total annual additions to a participant’s account (which includes employee elective deferrals, employer contributions, and any forfeitures) cannot exceed the lesser of:
  • $70,000 for 2025, or
  • 100% of the participant’s compensation.
  • Catch-up contributions are not counted toward the $70,000 annual additions limit. This means the $7,500 catch-up is in addition to the $70,000 cap.

3. Compensation Limit

  • The maximum amount of compensation that can be considered for plan purposes in 2025 is $350,000.

4. S Corporation Shareholder-Employee Considerations

  • For S corporation shareholder-employees, only wages paid to the shareholder for services rendered to the S corporation (i.e., W-2 wages) are considered compensation for retirement plan purposes. Distributions or K-1 income are not considered compensation for 401(k) contribution purposes.

5. Calculation of Maximum Total Contribution

  • The maximum total contribution for a 50+ year-old S corporation shareholder-employee in 2025 is:
  • $70,000 (combined employee deferral and employer contributions, not including catch-up), plus
  • $7,500 (catch-up contribution),
  • for a total of $77,500, provided the individual has at least $77,500 in eligible W-2 compensation and the employer is willing to make sufficient contributions.

Example:

If the shareholder-employee has at least $77,500 in W-2 wages:- Employee elective deferral: $23,500- Employee catch-up: $7,500- Employer contribution: $46,500 (to reach the $70,000 annual additions limit)- Total possible contribution: $77,500

If the W-2 compensation is less than $77,500, the total contribution (including catch-up) cannot exceed the sum of W-2 compensation plus the catch-up, subject to the 100% compensation limit for annual additions.

6. Special Note on Greater than 2% S Corporation Shareholders

  • Greater than 2% S corporation shareholders are not eligible to receive pre-tax employer contributions for health insurance or certain other fringe benefits, but this restriction does not apply to employer contributions to a qualified retirement plan such as a 401(k).

7. Tax Deductibility

  • The employer’s deduction for contributions to the plan is generally limited to 25% of the total eligible compensation of all participants, but this does not affect the annual additions limit for the individual participant.

8. Summary Table for 2025 (assuming sufficient W-2 compensation)

Employee elective deferral: $23,500

Employee catch-up (age 50+): $7,500

Employer contribution: up to $46,500

Total maximum contribution: $77,500

Key caveats:

- The total of all contributions (other than catch-up) cannot exceed the lesser of $70,000 or 100% of W-2 compensation.

- The catch-up contribution is allowed in addition to the $70,000 limit.

- Only W-2 wages from the S corporation count as compensation for these purposes.

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