Can You Leave Unequal Shares of an IRA to Different Beneficiaries?
Many people assume that naming more than one beneficiary on a retirement account means splitting it evenly, the way heirlooms sometimes get divided in an old family story. That assumption isn’t how these forms actually work, and the difference is worth understanding before anyone fills one out.
The short answer
An IRA owner can generally name multiple primary beneficiaries and assign each one a different percentage of the account rather than splitting it equally. The allocation is set directly on the custodian’s beneficiary designation form, with percentages that need to add up to 100. Because this form typically controls where the money goes regardless of what a will says, getting the percentages right is part of making sure the account passes the way it’s intended.
How percentage-based designations work
Most custodians ask for a list of primary beneficiaries along with a percentage next to each name. There’s no requirement that the shares be equal — an account owner might assign a larger share to one adult child and a smaller share to another, or split unevenly between a family member and a charity. The form usually also allows for contingent beneficiaries, who would only receive a share if a primary beneficiary has already passed away, and those shares are set independently from the primary allocation.
Why the beneficiary form does the heavy lifting
A will generally does not control how a retirement account is distributed, because the account passes by contract to whoever is named on the custodian’s form. This is one of the more common points of confusion in estate planning: someone updates their will to reflect new wishes but never touches the actual beneficiary paperwork, so the account still follows the old percentages on file. Reviewing beneficiary designations as a stand-alone task, separate from updating a will, is the only way to make sure the two documents actually agree.
Common reasons people choose unequal shares
- Different financial circumstances. One beneficiary may already have significant retirement savings while another does not, prompting a different split.
- Blended families. A second marriage might call for a share going to a spouse and separate shares going to children from an earlier relationship.
- Charitable intent. A percentage can often be directed to a qualified organization alongside shares for individual people.
- Special circumstances for one beneficiary. A share might be adjusted because one beneficiary has other needs, such as those addressed through a special needs trust rather than a direct individual designation.
What can complicate an unequal split
Percentages that don’t add up to exactly 100, or forms that list a beneficiary who has since died, can create confusion during the inherited IRA process later on. Some custodians round or reject incomplete forms outright, which is one reason it helps to request written confirmation after any change rather than assuming a form was processed correctly. Because rules around inherited accounts can be involved and change over time, beneficiaries in an unequal-share situation may find it useful to understand the general framework before assuming how a distribution will be handled.
The takeaway
Splitting an IRA unevenly among beneficiaries is a routine and widely available option, handled through percentages on the custodian’s own form rather than through a will. The mechanics are simple, but the outcome depends entirely on that paperwork being accurate and current, which makes it one of the more overlooked details in an overall financial plan.