You need to divide the total of your non-deductible contributions by the total value of your IRA. That will give you a percentage. Subtract that decimal percentage from 1 and multiple the result by your RMD and that will give you the taxable amount. For instance, if your non-deductible contributions are $5,000 and the value of your IRA is $20,000, then 25% of your IRA is non-deductible contributions. Subtract .25 from 1 and you get .75, or 75%. If you withdrew $1,000 from your IRA, then $750 of it would be taxable ($1,000 times 75%.)
**Say "Thanks" by clicking the thumb icon in a post
**Mark the post that answers your question by clicking on "Mark as Best Answer"
