Seriously Hump, what are you trying to prove?
I am still not sure but since he has not taken the time to to run the numbers, I ran them myself using his scenario (which I still don't understand how it is real life, but so be it).
If I represented his stipulations of found money correctly, scenario 2 is still better I think.
Humps, if I misrepresented this, please let me know and I will adjust.
Humps scenario
" I've been comparing $10K in a Roth to $10K in traditional and $3K in a taxable account all along. How is that not clear?"
Scenario #1: $10,000 to Roth
Scenario #2: $10,000 to 401k, $3000 to taxable account
Assumptions
Tax Rate Before Retirement: 30%
Tax Rate After Retirement: 20%
Capital Gain Tax rate: 15%
Growth in every account: 5%
Time period: 30 years
No dividend assumed in taxable account
After 30 years:
Roth grows to: $41,161
401K grows to: $41,161
Taxable Account Grows to: $12,348
After Taxes:
Final Roth: $41,161 (no tax implications)
Final 401k After Withdrawal: $32,929 = 41,161 * .8
Final Taxable Account after selling: $10,945 = (($12,348-3000) * .85) + $3000
Final Count
Scenario 1: $41,161
Scenario 2: $43,874
edit to account for original $3000 in taxable account not needing to be taxed at withdrawal.