Jade38

Hi, looking some advice. I got a notification yesterday re my tax code changing. I currently earn 37,350 in my main employment and my tax code is 1246L (reduced due to taxable expenses via work). I have a second job, a banking contract. They have estimated my income to be £13,700. My tax code for this employment has always been BR. My tax code for my main employment changed to 848L and second employment has stayed at BR. I was advised this was due to earnings bringing me over 50k. Is this correct? Should my main employment tax code not remain the same as they are 2 separate employments? Thanks in advance.