Assuming you are part of one application, the members of your household can enroll in separate plans in a health insurance Marketplace. For example, you may want separate plans because a grown child lives in another part of the state or because your spouse needs a plan with a different provider network than the one you chose. The premium tax credit will be allocated to the plans in which different family members enroll. However, if you have a grown child who you do not include as a tax dependent, his or her income will be counted separately for determining eligibility for subsidies. Note also that you may have higher out-of-pocket costs if you have separate plans (for example, with separate deductibles) as opposed to one family plan (with one deductible for the entire family).