Quick Answer
Excess 401(k) contributions must be withdrawn by April 15 of the following year to avoid double taxation. For 2026, if you exceeded the $23,500 limit ($31,000 if 50+), your employer must distribute the excess plus earnings by the deadline. Without correction, you'll pay taxes twice on the same money.
Best Answer
Marcus Rivera, CFP
Best for executives or professionals who work multiple jobs and may exceed 401(k) limits across employers
What happens when you exceed the 401(k) limit?
Excess 401(k) contributions occur when your total deferrals across all employers exceed the annual limit — $23,500 for 2026 ($31,000 if you're 50 or older). The IRS requires these excess amounts to be distributed by April 15 of the following year, along with any investment earnings on that money.
Without correction, you face double taxation: once when the excess is contributed (since it wasn't actually tax-deductible) and again when it's eventually distributed in retirement.
Example: High earner with job change mid-year
Sarah earns $200,000 and contributed $15,000 to her 401(k) at Company A before switching jobs in August. At Company B, she contributes another $12,000, totaling $27,000 for 2026 — $3,500 over the limit.
Here's what must happen:
The correction process step-by-step
Step 1: Identify the excess
Calculate your total deferrals across all employers. Include salary deferrals, but NOT employer matches or profit-sharing.
Step 2: Choose which plan corrects
You decide which employer's plan should distribute the excess. Most people choose their current employer for convenience.
Step 3: Notify the plan administrator
Submit a written request for excess distribution before March 1 (for the prior year). Include:
Step 4: Calculate earnings
The plan calculates earnings (or losses) on the excess from the contribution date through the distribution date using the plan's standard method.
Comparison: Correction timing and consequences
Special situations for high earners
Multiple employers: You're responsible for tracking contributions across jobs. Employers don't communicate with each other about your total deferrals.
Highly compensated employees: If you earn over $155,000 (2026 threshold), you may face additional limits due to nondiscrimination testing. These can create "deemed" excess contributions even if you stayed under the annual limit.
Roth vs. Traditional: Excess contributions apply to your combined traditional and Roth 401(k) deferrals. The correction maintains the same Roth/traditional ratio as your original contributions.
What you should do
1. Track contributions monthly if you have multiple jobs or change employers mid-year
2. Request correction immediately if you discover an excess — don't wait until tax season
3. Use our paycheck calculator to model contribution limits when planning job changes
4. Keep detailed records of all 401(k) contributions for tax preparation
[Use our paycheck calculator to model 401(k) contributions across job changes →](paycheck-calculator)
Key takeaway: Excess 401(k) contributions create double taxation if not corrected by April 15. High earners with multiple jobs should track contributions monthly and request corrections immediately upon discovery.
*Sources: IRS Publication 560, IRC Section 402(g)*
Key Takeaway: Excess 401(k) contributions must be corrected by April 15 to avoid double taxation, with high earners across multiple jobs being most at risk.
Consequences of excess 401(k) contributions based on correction timing
| Correction Timing | Tax on Excess | Tax on Earnings | Penalty |
|---|---|---|---|
| By April 15 | Current year | Distribution year | None |
| After April 15 | Current year + next year | Distribution year | 10% on excess |
| Never corrected | Double taxation | At retirement | 10% early withdrawal |
More Perspectives
Sarah Chen, CPA
Best for employees 50+ using catch-up contributions who may accidentally exceed limits
Catch-up contribution mistakes near retirement
If you're 50 or older, you can contribute an extra $7,500 in catch-up contributions for 2026, bringing your total limit to $31,000. However, many pre-retirees make errors with these limits, especially during the new "super catch-up" period for ages 60-63.
Example: Age 62 with super catch-up confusion
Tom, age 62, thought he could contribute the new super catch-up amount of $34,750 for 2026. However, his employer's plan doesn't offer super catch-up yet. He contributed $31,000 (regular limit + catch-up) thinking he was safe, but accidentally contributed an additional $3,750 in after-tax contributions that he mistakenly thought were pre-tax deferrals.
The correction process is the same, but the stakes are higher near retirement because you have less time to recover from tax mistakes.
Age-specific considerations
Ages 50-59: Standard catch-up of $7,500 applies. Total limit is $31,000.
Ages 60-63: Super catch-up of $11,250 may apply IF your employer's plan allows it and you haven't maxed out regular catch-up in prior years. Many plans won't offer this until 2027 or later.
Ages 64+: Back to standard catch-up rules ($7,500 extra).
What you should do
Verify your employer's catch-up policies before maximizing contributions. Not all plans offer super catch-up immediately, and some require additional documentation to prove eligibility.
Key takeaway: Pre-retirees using catch-up contributions should verify their plan's specific limits and super catch-up availability to avoid costly correction procedures.
Key Takeaway: Pre-retirees using catch-up contributions should verify their plan's specific limits and super catch-up availability to avoid costly correction procedures.
Marcus Rivera, CFP
Best for employees juggling W-2 jobs and side consulting work with different retirement plans
Coordinating limits across multiple employers
When you work multiple jobs, each employer only sees their portion of your 401(k) contributions. You're responsible for ensuring your combined deferrals don't exceed the annual limit.
Example: W-2 job plus consulting
Maria works full-time earning $120,000 and contributes $18,000 to her employer's 401(k). She also consults part-time, earning $40,000, and opens a Solo 401(k) for her consulting business. She contributes another $8,000 to the Solo 401(k), totaling $26,000 — $2,500 over the 2026 limit.
The correction must come from one of the plans (her choice), but the process involves coordinating between different plan administrators.
Multiple plan complications
Different plan years: If your employers have different plan years (calendar vs. fiscal), tracking becomes more complex.
Solo 401(k) considerations: Self-employed contributions have different correction procedures and may involve both employee and employer contribution components.
Timing issues: Job changes mid-year create the highest risk of excess contributions, especially if you don't immediately notify new employers of prior contributions.
Key takeaway: Multiple job holders should track 401(k) contributions across all employers monthly and communicate prior-year contributions when starting new positions.
Key Takeaway: Multiple job holders should track 401(k) contributions across all employers monthly and communicate prior-year contributions when starting new positions.
Sources
- IRS Publication 560 — Retirement Plans for Small Business
- IRC Section 402(g) — Limitation on exclusion for elective deferrals
Related Questions
Reviewed by Marcus Rivera, CFP on February 28, 2026
This content is for educational purposes only and is not a substitute for professional tax advice. Consult a qualified tax professional for advice specific to your situation.