That’s the amount a woman loses over a 40-year period in her income due to the gender pay gap, according to the National Women’s Law Center (NWLC), a nonprofit legal and advocacy group. Or, as Reuter’s columnist wrote, “the typical woman needs to work 11 years longer than a man to achieve accumulated income parity.” Combine that with a woman’s longer average lifespan, among other unique factors (like leaving the workforce), and this gender pay gap can have a huge impact on retirement.