If you want to max all skills, I've typed all of these out so that you can copy/paste them in-game, replace the x with the skill level (10 in most cases) and master all skills fairly quickly.

It's kinda cool to buy a cheap house and then earn every dollar you spend in The Sims 4. 

This is satisfying for a while, but eventually you want to have this huge villa and the chic swimming pool. That's where the many cheats for The Sims 4 Cheats come in, giving you the ability to change all the important concepts and annoyances you come across. How to Use Cheats in The Sims 4 To open the Cheat window, press Ctrl + Shift + C on your keyboard. This opens a dialog / input window in the upper left corner where you can enter the cheats. After you have entered the desired cheat, you must press Enter to activate it. Then you have to press Ctrl + Shift + C again to close the dialog box.

To turn cheats on and off in The Sims 4.

  Some cheats can be entered directly into the dialog box described above, while others require an additional command. If you enter one of the cheats listed below and it does not work, try entering TestingCheats True and pressing Enter. If you no longer wish to use cheats, please enter TestingCheats False and press Enter again. Close the dialog box again by pressing Ctrl + Shift + C.