The pro-rata rule is a tax rule that determines how withdrawals or conversions from traditional IRAs are taxed when the account contains both pre-tax and after-tax contributions.
This rule requires distributions to be calculated proportionally between taxable and non-taxable funds.
The pro-rata rule affects individuals who attempt strategies such as Roth IRA conversions or backdoor Roth contributions. It prevents taxpayers from selectively withdrawing only after-tax contributions to avoid taxation.
Understanding the pro-rata rule helps individuals avoid unexpected tax consequences.
When funds are withdrawn or converted from a traditional IRA containing both pre-tax and after-tax contributions, the distribution must include a proportional share of each type.
The taxable portion is calculated based on the ratio of pre-tax funds to total IRA assets.
Taxable\ Portion = Withdrawal \times \frac{Pre\text{-}Tax\ Balance}{Total\ IRA\ Balance}
When does the pro-rata rule apply?
It applies when traditional IRAs contain both pre-tax and after-tax contributions.
Does the rule apply to all IRAs combined?
Yes, it considers the total balance of all traditional IRAs.
Why is this rule important for Roth conversions?
It affects how much of the conversion is taxable.