What Is the Single Life Expectancy Table?

The Single Life Expectancy Table is a chart published by the Internal Revenue Service (IRS) that provides life expectancy factors used to calculate required minimum distributions (RMDs) from certain retirement accounts. This table is primarily applied in situations involving beneficiaries of inherited retirement accounts who are not the account owner’s spouse. Its purpose is to guide the systematic withdrawal of funds in a way that is consistent with federal tax rules designed to ensure the account is eventually depleted and taxed.

Understanding how the Single Life Expectancy Table works is essential for tax compliance and for managing the distribution strategy of inherited retirement assets.

Purpose and Use of the Table

The IRS created several life expectancy tables to ensure that distributions from tax-deferred retirement accounts begin at the appropriate time and are withdrawn in a reasonable and measurable manner. The Single Life Expectancy Table is specifically intended for:

• Non-spouse beneficiaries of inherited IRAs or other qualified retirement plans.
• Beneficiaries who are required to begin taking RMDs based on the life expectancy of the designated beneficiary.
• Certain scenarios involving successor beneficiaries and stretch IRAs, where allowed.

This table is not typically used by the original account holders during their lifetimes. Instead, it becomes relevant after the account owner has died and the account passes to a beneficiary.

How the Table Works

Each age listed in the Single Life Expectancy Table corresponds to a life expectancy factor. This factor represents the number of years over which the account balance should be distributed. The factor decreases by one for each successive year, simulating the aging of the beneficiary.

To calculate an RMD using this table, the account balance as of December 31 of the prior year is divided by the applicable life expectancy factor. For example, if a 40-year-old inherits a traditional IRA and their life expectancy factor is 43.6, the first RMD would be calculated by dividing the prior year-end balance by 43.6. The following year, the divisor would be 42.6, and so on, reducing annually unless a reset or recalculation is required due to a new rule or successor beneficiary.

Who Must Use It

Non-spouse beneficiaries of IRAs and qualified retirement plans typically must use the Single Life Expectancy Table when required to take annual distributions. This includes:

• Adult children
• Grandchildren
• Siblings
• Other individual beneficiaries who are not the decedent’s spouse

When a non-spouse beneficiary inherits a retirement account and chooses or is required to take distributions over their life expectancy (rather than withdrawing the entire amount within 10 years, as required under the SECURE Act in most cases), this table provides the structure for doing so.

It’s also relevant in limited situations under the old “stretch IRA” rules, which were more widely used before the SECURE Act of 2019 changed the landscape of inherited retirement account distributions. Under these earlier rules, a non-spouse beneficiary could "stretch" the distributions over their lifetime, using the Single Life Expectancy Table to determine the pace of withdrawals.

Key Regulatory Context

The importance of the Single Life Expectancy Table has evolved in light of legislative changes. Before the SECURE Act of 2019, many non-spouse beneficiaries used this table to stretch RMDs over their lifetimes, thereby deferring taxes for as long as possible.

However, the SECURE Act significantly limited this practice by requiring most non-spouse beneficiaries to fully distribute inherited retirement accounts within 10 years of the original account owner's death. There are exceptions—eligible designated beneficiaries (EDBs), such as disabled individuals, minor children of the decedent, or those not more than 10 years younger than the decedent, may still use the Single Life Expectancy Table to determine annual RMDs.

Furthermore, changes made in the IRS's updated life expectancy tables, which took effect in 2022, slightly increased the life expectancy factors to reflect longer average lifespans. This change generally reduces the amount of each annual RMD, allowing assets to remain in the account a bit longer.

Common Mistakes and Considerations

Misapplying the Single Life Expectancy Table can lead to costly tax penalties. If a beneficiary fails to withdraw the required minimum distribution or uses the wrong life expectancy factor, the IRS may impose a penalty of 25% (reduced to 10% if corrected in time) on the amount that should have been withdrawn but wasn't.

Additionally, beneficiaries must be careful to use the correct table. For instance, using the Uniform Lifetime Table or Joint Life and Last Survivor Expectancy Table—both designed for account owners—would result in incorrect calculations.

Another consideration is what happens when a successor beneficiary inherits the account after the death of the original beneficiary. The life expectancy factor is not reset based on the new beneficiary’s age. Instead, the distribution schedule continues based on the remaining life expectancy of the original beneficiary, reduced by one for each passing year.

The Bottom Line

The Single Life Expectancy Table plays a critical role in managing inherited retirement accounts for non-spouse beneficiaries. Its use is guided by specific IRS rules and has been shaped by legislative changes like the SECURE Act. Proper application of the table ensures compliance with required minimum distribution rules and helps beneficiaries avoid tax penalties. As laws governing retirement accounts evolve, understanding how and when to apply this table remains a crucial part of effective retirement account planning and inheritance strategy.