Max 401k Contribution 2025 Including Employer Portal. If you contribute, say, $23,000 toward your 401(k) in 2025 and your employer adds $5,000, you’re still within the irs limits. The 401(k) contribution limit is $23,000.
Those 50 and older can contribute an additional $7,500. Simple 401(k) plan contributions max out at $16,000 for the 2025 tax year.