Never use "universal" money mods. Ensure the filename contains 1.40 or v1.40. Avoid .exe files—true mods are .scs or .zip.
After scanning the major modding communities (SCS Forum, ModLand, ETS2.lt, and Steam Workshop), here are the most stable and popular options for version 1.40: euro truck simulator 2 money mod 1.40
Compatible with ETS2 v1.40.x (all DLC maps supported) Never use "universal" money mods
Installing a Euro Truck Simulator 2 Money Mod 1.40 incorrectly is the #1 cause of save corruption. Follow these steps precisely. Installing a Euro Truck Simulator 2 Money Mod 1
Ironically named, this mod lowers income from loans and increases job payouts moderately (5x). It also adds new bank profiles with huge credit limits. This is ideal for players who want to simulate running a massive logistics empire without outright cheating.