Anonymous wrote:As long as you file joint taxes, it does not matter who reduces their contribution. The only caveats would be if one of you would lose a match if you reduce or one of you is subject to Highly Compensated Employee restrictions and is better to keep that spouses' contribution low.
If one of you has much better options available (lower expense ratio, better investment choices), that could swing a decision too.
If you divorce, it will be split 50/50.
This is all true, but the saying, "possession is 9/10 of the law", is also true. I prefer to keep the recommended portion of my earnings in my own retirementment. In the event of death (or divorce), owning the account is more straightforward.