<prompt> Human: I just found out that Im getting a 12,500 raise and promotion. This is pretty significant for me as a single mother who just bought her first house earlier this year! Can anyone give me some advice on what to do? Things to changelook out for? Im already maxing out my 401k matching. The change is from 37,500 to 50,000, are there any tax changes I need to be aware of? Right now, I have nothing taken out of my paycheck for federal taxes because of how my refunds and tax liability has been for the past few years. Does this need to change? Not married, 2 children, baby due in a month so 3 kids by the time I file taxes for 2017. I have no debt apart from my mortgage, so there arent any credit cards or car payments or anything like that to consider.Any advice is very, very welcome. This came as a total shock so I dont quite know what to do with myself!Edit: Thank you all SO MUCH for the fantastic recommendations and advice!  <response>: Try to live your life as though youre still making 37.5k. I live in an oil-rich area and when things were really good and oil was at more than 100 dollars a barrel, people who barely made it through high school were suddenly conducting themselves like royalty. No small number of people vastly over-extended themselves financially and seemed to believe that a six-figure income was their birthright. Now that oil is at less than 50 dollars a barrel, a lot of those same people have long since forfeited their 75-thousand-dollar trucks and their 400-thousand-dollar houses to the bank and are wondering how or even if theyll ever again build their credit. 