Yes, it's true. Your weight can impact your paycheck.
According to a 2010 study by University of Florida and London Business School researchers, weight plays a role in employee wages. But the results are different for men and women. The study, which was published in the Journal of Applied Psychology, found that wages fell by $13,847 to $15,572 for every 25 pounds that women put on. For men, wages increased by $7,775 to $8,437 for every 25 pounds.
A 2011 report by the Federal Reserve put a finer point on how weight impacts salary. The report found that leaner women earned more than others. With men, however, the relationship between weight and pay is harder to pin down. Like the Journal of Applied Psychology study, men's salaries appeared to go in the opposite direction: rising for heftier men with a larger body mass index. But the increase may be rewarding only bigger men with more muscle than fat.
Fed economist Michael Owyang, who co-authored the report, says that the connection between weight and pay for women "is more statistically negative than for men." For both sexes, he says, employers might pay heavier workers less if they think the employee will cost the company more in health insurance costs.