The deductible contribution on ira taxes for a single individual varies from $500 to $2,000 corresponding to variations in gross income from $32,500 to $25,000 respectively. Beyond $35,000 of gross income, no deductible contribution is permitted. For married couples, the deductible contribution ranges from $500 to $2000 for the gross income range between $47,500 and $40,000. Beyond $50,000 deductible contribution is not allowed.