The bank is a building where you can save some of your income. When you transfer the income to your bank account, you will earn interests. This can be very useful because the more money you have in the bank, the more money you can get as interest.
Interests will be calculated and paid daily. Interest are based upon commerce. The bank is not limited, you can have access to your savings, deposit or transfer your payout at any time.
How do they get calculated?
At a rate of 7% and an account balance of 1,000,000 Money
Here, in this example the player gets 2,916.67 $ per hour.
To the day that's 70.000$. There are no compounded interest calculated to it. This only works when no money was withdrawn from the account. It is also possible that the interest rate falls to 0%.