Are bonuses subject to 401k withholding?
James Williams
Published Feb 25, 2026
401(k) contributions must be withheld from a participant’s bonus compensation, unless otherwise indicated in the plan document.
Are bonuses taxed before 401k?
Combining a Bonus and a 401k Contribution Supplemental pay such as bonuses is generally subject to a higher withholding rate than ordinary pay. In that case, the money is siphoned off to your 401(k) account where it won’t be taxed until you withdraw it to retire.
How much of my bonus should I put in 401k?
In the example above, 10% is the sweet spot in terms of 401(k) contribution percentage, where (depending on your salary) you are not exceeding the annual IRS contribution limit before the end of the calendar year, which will also allow you to also nab the full employee match.
What happens if you don’t get a bonus in your 401k?
The total 401 (k) contribution limit doesn’t distinguish between “normal” income and bonus income. If you don’t match bonuses, employees can just contribute more from their paychecks, so you aren’t really preventing anything.
Can a pre tax contribution be made to a 401k?
The employee elects a 401K contribution percentage and whether that percentage is a pre-tax or post tax contribution. You can elect a different percentage for Bonus wage types and regular wage types.
Are there bonuses included in a 401k match?
In summary – Are bonuses included as part of 401k matching (For nondescrimination Testing / Safe Harbor?) UPDATE – I should have added, this is in reference to nondiscrimination testing / safe harbor testing for 401k plans.
How are bonuses taxed and how are they treated?
As such, bonuses (like other supplemental wages) are treated differently than ordinary wage or salary income when it comes to taxes withheld at payout. There are two ways of withholding taxes from your bonus: the percentage method and the aggregate method. Which method gets applied to your bonus? Let’s find out.