How to Earn Free Cash in Idle Miner Tycoon?

In-game cash can be earned for free in the game with a little elbow grease, but take note that they are limited. One of the easiest ways to earn them in bulk is by meeting certain achievements in the game. For instance, leveling your mine shafts, warehouse, or elevator to certain levels, or reaching a certain depth in your mine, etc. Each of these in-game achievements would usually reward you with in-game cash.

You can also earn them through daily rewards - on certain dates. You can’t miss them as they are given in order whenever you play the game (for instance you missed playing on the concluding day, the scheduled reward will be given the next time you play).

And then there are also the event mines. Event mines are unique mines that lets you play on time-limited areas that usually employ unique types of ore and resource (currency). What you usually have to do is meet certain requirements, like leveling up a certain mine shaft to a specific level (e.g. Upgrade Mine shaft 20 to level 600), reach the farthest floor, etc. There are multiple tiers of achievements -- each of which usually equate to additional in-game cash on top of the rewards. Every time an event turns up, they usually run for a week or so, and will re-spawn after a few days rest.

Then there is also the option to get them thru IAPs (in-app purchases). There are several packages to choose from -- like those ones that are on daily offers that includes multipliers, chests and what not. You can also simply buy them in bulk in the shop (in-game cash packages) or simply when you click on the (+) sign right next to the cash icon counter on top.