Homemakers aren't planning for retirement, and they're extremely vulnerable to running out of money and ending their lives in poverty. They're also not as optimistic about retirement as workers and retirees.

Those are the not-so-cheery findings of a report from the Transamerica Center for Retirement Studies and the Aegon Center for Longevity and Retirement, which found that homemakers are not in a good position when it comes to retirement—either globally or within the U.S.

The report "Homemakers Are Not Off the Hook: How Should They Be Planning for Retirement?" found that homemakers, 81 percent of whom in the U.S. are women, are far less likely to believe they should be taking an active role in ensuring that they have enough money to live on during retirement. U.S. homemakers, at 40 percent, are more likely to feel "very" responsible for doing so; globally the number is lower, with just 32 percent of homemakers feeling "very" responsible.