The being income is the financial income we need in whatever currency (conventional money or free currencies) in order to be, this means who we want to be as for our deepest, most joyful and meaningful realization.
The being income is to be differentiated from the usual vital income (1st tier of Maslow's pyramid) covering our physiological needs, or basic income (2nd tier of Maslow's pyramid) covering our safety needs. See Maslow hierarchy of needs.

In the conventional world many income situations cover 1st level of Maslow Pyramid and leave aside the other levels.
Scarcity of money due to Pareto concentration push people to negociate and fight for vital or basic income. By not claiming a being income that fulfils all levels of Maslow pyramid, they contribute to perpetuate the scarcity paradigm that goes along with self-depreciation.
Higher income range somewhere between vital and being income levels. The tricky aspect is that high income rarely really address real aspirations of the being. The reason is accessing to higher financial income often implies to comply into the conventional cultural behavior in the pyramidal collective intelligence paradigm. For those who access very high income streams, it is often at the cost of their own integrity: control on others, unsustainable load of work and responsibilities, entanglement in unsustainable consumerist worldviews, etc.
Calculating and claiming a being income -- as a person or as an organization -- is a powerful way to manifest clear intention in life, build clear contracts with ourserlves and others, shift the system to higher moral standards, and develop self-esteem.
One can then reach the experience of offering the best of his/her art, and be well rewarded for it.