Thanks. That's what i figured. So it could affect the calculations of which method is best. I assume the MadFIentist took it into account.
Yeah that is what we were talking about.
So from what I understand withdrawing/conversion from a traditional 401k or traditional IRA are considered income and are taxed accordingly.
The standard deduction, personal exemptions and child dependents will lower the income counted for taxing.
Standard Deduction(2016):
$6,300 for singles/married persons filing separate returns and $12,600 for married couples filing jointly.
Personal Exemption(2016):
$4,050
Whatever is left after your deductions is taxed at the appropriate rate for the amount when you convert it from a Traditional IRA to a Roth IRA.
Then if you wait 5 years from the conversion you can withdraw the deposited amount without growth tax free and without penalty. However if you withdraw before the 5 years is up there is no additional tax, but there is an additional 10% penalty.
Mathmatically it makes most sense to wait the 5 years and not be hit by the 10% penalty. However if you are currently paying 20% tax on average and saving a very high % to traditional 401k yet transfer only 40k from your Traditional IRA to Roth IRA for example in FIRE you would still only effetely be losing 15% of your money as opposed to the 20% that would have been taken out by investing it after tax in a Roth 401k/IRA. Of course the higher your withdraws in retirement are the closer it will be to breaking even.