How much is Obamacare per month? The average monthly premium for 2018 benchmark Obamacare plans is $411 before subsidies, according to the U.S. Department of Health and Human Services. Share Frequently Asked Questions - ACA - Obamacare FAQsCan I get financial assistance during a Special Enrollment Period?How do I apply for coverage during a Special Enrollment Period?How Does Obamacare Work?How long do I have to enroll after a qualifying life event?Is Obamacare available to everyone?Is Obamacare free?What are the advantages of ACA?