Is there any way to make a lower wage mod work for custom careers too? I like having a little more realism in my game, especially since playing long multigenerational saves can result in my sims accumulating tons of money and nothing to do with it otherwise, but I use custom careers quite a lot and wouldn’t want them to be inbalanced.

You would need to open up the package file for each custom career and edit the XML Resource that contains the BasePay amount.

If you need more details, let me know the name (and a link to it as well, if possible) of one of the custom careers that you'd like to change and I'll give you an exact example.

As another avenue, the testing version of Careers should allow you to modify the base pay in non-downtown world types as well.

Although it's on the main sidebar, just to clarify for those reading this who may not be familiar with our beta testing system, the testing versions of the mods are here. The version of Careers being referenced is the v88a one (currently).