Saying this again another way for greater clarity...
This report was more commonly referred to as the "Income Statement" , the "Profit/Loss Statement" and/or the "P and L" in traditional accounting education. All of these names refer to the EXACT SAME REPORT.
We've renamed to the "Net Income Statement" to directly remind all knew Bookkeepers what it does with less confusion, inference and verbal omissions.
Why did we add "Net" to the name?
The general equation that describes this report is "Net Income = Income - Expenses".
Without adding the word "Net" the equation reads "Income = Income - Expenses" , and that doesn't make any sense given the fact we are creating the report for the sole purpose to deduct known expenses from an income value to start with. If the expenses were zero we'd have no need to prepare the report to start with.
How's that for another subtle, cognitive pretzel.
With their lingo it would have been better to say "Income = Gross Income - Expenses " but they never did that. And if they were going to do that it would have been even better to say "Net Income = Gross Income - Expenses =". But if they did that, they'd have had to name the report the same thing we just did and that would have provided a level of clarity they have sought to avoid for decades if not centuries. .
By adding "Net" to the Report Name each time the report name is uttered the intentions of the report can not be lost.
This is actually a very simple report governed by the equation:
Net Worth = Assets - Liabilities
"Assets" are cash, balances in checking, savings and investment accounts, and objects with a quantifiable resale or salvage value.
Assets are summarily thought of as "things you own".
"Liabilities" are credit card balances, loans and other debt.
Liabilities are summarily thought of as negative cash balances and/or "amounts you owe".
The Confusion revisited...
In the introduction we exposed the fact that this simple report is not defined properly in main stream accounting curriculum.
The definition of this report is in fact applied to the Balance Sheet in entirety,, which contains two Net Worth Statements not one, and together they perform a function that neither by itself could do. .