I was inputing some figures into Karl Grabes tax calculator.
I am joint assessed for tax reasons
If i input 100k into the formula for my 05 income and 0 for my wife
My tax bill is 29122
If i input 100k and also put my wifes earnings as €1
my tax bill is 27852.2
therefore by my wife earning 1 euro my tax bill is reduced by €1,269.80
Firstly am i correct and secondly does anyone know the rational behind this.
I am joint assessed for tax reasons
If i input 100k into the formula for my 05 income and 0 for my wife
My tax bill is 29122
If i input 100k and also put my wifes earnings as €1
my tax bill is 27852.2
therefore by my wife earning 1 euro my tax bill is reduced by €1,269.80
Firstly am i correct and secondly does anyone know the rational behind this.