Liz Weston: 8 ½ birthdays that can affect your finances LIZ WESTON of NerdWallet FacebookTwitterEmail FILE - This undated file photo provided by NerdWallet shows Liz Weston, a columnist for personal finance website NerdWallet.com. (NerdWallet via AP, File)AP You hit a lot of milestone birthdays when you’re young. There’s your first birthday, of course, and also the one where you turn 10 (finally, double digits!). At 13, you’re a teenager. At 16, you’re probably thinking about driving. At 18, you can vote; at 21, you can get into bars. You hit a bunch of milestones later in life as well, and many of them have to do with retirement . Knowing these age milestones can help you better prepare for life after work. They include: