So how much should you save? In an interview with CBS News, financial expert David Bach said that people should save one hour's worth of income every day (that's 12.5 percent of your gross pay). Most people only save 4 percent of their income -- just about 20 minutes of work.The trick is to start slow.n an interview with CBS News, financial expert David Bach said that people should save one hour's worth of income every day (that's 12.5 percent of your gross pay). Most people only save 4 percent of their income -- just about 20 minutes of work. The trick is to start slow.