How do I earn money in Bus Simulator 21?
You generate income through all assigned buses on your routes. The satisfaction rating you have reached while driving the route yourself determines how well NPC drivers drive the route. The satisfaction rating, as well as the number of assigned buses, add up to the money you earn from each route per payday.
The second source of income comes through your ticket sales as well as dodger fines you collect when controlling passengers in your buses for tickets.
Finally, you can also generate income through advertisements on your buses. The income an advertisement generates is shown in the customization menu where you attach the ad.