Definition of “Additional Income” is “net after taxes but before qualified plan deduction”.

For example, if someone is earning $150,000 they have $30,000 of mortgage interest deductions and $10,000 of charitable deductions, then Additional Income is $110,000 for the Qualified Plan Calculator and if they are putting $15,000 into their QP, then Additional Income is $95,000 for Accumulation and Distribution Calculator.