Pls see my dad in Ontario's facts. He maxed out his TFSA, and his annual pre-tax income (henceforward "APTI") is $50K. CRA website shows his 2019 RRSP deduction limit is $100K.

If I understood this Reddit post, comment by LazloStPierre, by Palestrina,

1. is optimal RRSP deduction = min([RRSP contribution limit, 8% taxpayer’s pre-tax earned income for previous year, min(Maximum federal tax bracket < APTI, Provincial tax bracket < APTI))? I don't think I formulated correctly.

I input my dad's facts into WealthBar -

2. Thus my dad ought contribute to his RRSP 50K (annual income pre-tax) - 5K (yearly tax deductions) - 43906 = 1094. Correct?

Pls see my dad in Ontario's facts. He maxed out his TFSA, and his annual pre-tax income (henceforward "APTI") is $50K. CRA website shows his 2019 RRSP deduction limit is $100K.

If I understood this Reddit post, comment by LazloStPierre, by Palestrina,

1. is optimal RRSP deduction = min([RRSP contribution limit, 8% taxpayer’s pre-tax earned income for previous year, min(Maximum federal tax bracket < APTI, Provincial tax bracket < APTI))? I don't think I formulated correctly.

   I input my dad's facts into WealthBar -

2. Thus my dad ought contribute to his RRSP 50K (annual income pre-tax) - 5K (yearly tax deductions) - 43906 = 1094. Correct?

Pls see my dad in Ontario's facts here. He maxed out his TFSA, and his annual pre-tax income (henceforward "APTI") is $50K.

If I understood this Reddit post, comment by LazloStPierre, by Palestrina,

1. isn't the optimal RRSP deduction = min([RRSP contribution limit, 8% taxpayer’s pre-tax earned income for previous year, min(Maximum federal tax bracket < APTI, Provincial tax bracket < APTI))? I probably didn't formulate this correctly.

I input my dad's facts into WealthBar -

2. Thus my dad ought contribute to his RRSP 50K (annual income pre-tax) - 5K (yearly tax deductions) - 43906 = 1094. Correct?

Pls see my dad in Ontario's facts. He maxed out his TFSA, and his annual pre-tax income (henceforward "APTI") is $50K. CRA website shows his 2019 RRSP deduction limit is $100K.

If I understood this Reddit post, comment by LazloStPierre, by Palestrina,

1. is optimal RRSP deduction = min([RRSP contribution limit, 8% taxpayer’s pre-tax earned income for previous year, min(Maximum federal tax bracket < APTI, Provincial tax bracket < APTI))? I don't think I formulated correctly.

I input my dad's facts into WealthBar -

2. Thus my dad ought contribute to his RRSP 50K (annual income pre-tax) - 5K (yearly tax deductions) - 43906 = 1094. Correct?