Additional Income Definition: “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. Another way to put this is “gross taxable income minus deductions plus qualified plan contribution”. For example: $150,000 of gross income minus $30,000 of deductions plus $16,500 of qualified plan contribution means you’d put $136,500 in the “additional income” box.