Q: It is open enrollment at my spouse’s employer. If my spouse adds me to their medical plan can I drop my coverage on my employer’s plan, even though it’s outside of our open enrollment?

A: The IRS has rules (26 CFR § 1.125-4 – Permitted election changes) on what changes to pretax elections outside of open enrollment are permissible. It’s these rules which are used to create an employer’s Section 125/Cafeteria plan. An employer may design their plan to be as permissive as the IRS (which in my experience is the norm) but there is no requirement to recognize all of the permitted election changes. So, your employer’s Section 125/Cafeteria plan document is where one should look for which rules are permissible for an employee, based on your employer’s plan design.

That being said, assuming your employer is using an “off the shelf” plan and are as permissive as what the IRS allows, then yes, change in coverage under another employer’s plan is a permissible midyear change event allowing you to decrease or revoke your election if you have elected corresponding coverage under your spouse’s plan.

So assuming your employer’s S.125/Cafeteria plan recognizes “change in coverage under another employer plan” as a permissible mid year change event, if you enroll in medical coverage under your spouses plan during their open enrollment, you may drop your employer’s medical plan. The IRS allows open enrollment under another employer plan/different plan year to be a permissible midyear change event to help resolve “election gridlock”. Otherwise an employee would have to have double coverage or go without coverage for a period of time in order to “synch” up with the plan they want to be enrolled in.

However, keep in mind, the ‘consistency rule’ always applies with any midyear event. Which means the election change must be on account of and corresponds with the change on the other employers plan. e.g. if only enrolling in spouse’s medical, you couldn’t also drop your dental coverage