AUGUSTA, Maine (AP) — The costs of plans being offered on Maine's health insurance marketplace are among the highest in the country on average before tax credits for lower-income individuals and out-of-pocket costs are factored in, according to a federal report released Wednesday.

Maine residents will pay an average of $403 a month for a mid-range insurance plan before tax credits, which some low-income families will get as an upfront discount, according to the report from the U.S. Department of Health and Human Services. The marketplaces, also known as exchanges, are a signature part of President Barack Obama's health care overhaul and open for enrollment Tuesday.

Maine's average is higher than the national average of $328 and puts the state tied with Indiana for sixth-highest out of 47 for which data was available.