It’s a question that has been at the heart of the health care debate for the past five years, and one that has been the source of plenty of confusion and misinformation: How much does Obamacare actually cost?

Over at the newly launched vox.com, Sarah Kliff has a piece attempting to offer an easy explanation of President Obama’s health care law. Kliff is always worth reading on health care policy, but when describing the cost of Obamacare, she writes, “Expanding health coverage to millions of Americans is expensive; it will cost more than $1 trillion over the next decade.” In reality, the Congressional Budget Office estimated this February that the cost would be slightly more than $2 trillion.