I have been actively searching for jobs since I was terminated in September (never thinking it would be more than a month before I found something). In my career, healthcare is always provided as a benefit, so I have optimistically waited to enroll. Assuming I get a job within the next few months (I have several interview lined up), can I cancel insurance bought through the marketplace, when my new employer provides it as part of my benefits?
You can and should cancel your Marketplace health plan when your new employer coverage starts. Make sure to drop your plan so that the employer plan starts when the old plan ends. You won't want a gap in coverage. You won't lose cost assistance eligibly until the employer plan starts.
Keep in mind that if your marketplace coverage extends past your start date for the employer, you could face one month where you pay for two plans... and the Marketplace plan wouldn't be eligible for cost assistance!
To cancel your coverage, log in to your Marketplace account and select the red “Terminate/end all coverage” button. Make sure to cancel after you have paid the last premium you need to pay to avoid coverage gaps.