This is called money management.
The ability to distribute and spend the money you have and at the same time know exactly how much you earn and from what sources.

I use all this in everyday life, routine, without having a small business. I have a program on my phone where I drive in all my earnings and expenses, and what topic they are related to.
I can find out at any time how much and when I spent on food, credit, entertainment.
At the same time, thanks to the application, I know perfectly well when and where I earned. All this provides excellent data for forecasting expenses. After a little calculation, I always know how much extra money I have.
I strongly advise same apps to everyone. Especially for business.