Inherited an IRA in California? The 10-Year Rule Explained

What Happened

A Santa Barbara estate attorney published guidance in August 2026 addressing one of the most consequential and misunderstood shifts in retirement account law: the 10-year rule for inherited IRAs. The article, written by an attorney with more than 25 years of experience in California estate planning, walks through the core obligations facing non-spouse beneficiaries who inherit traditional IRAs or 401(k) accounts.

The central message is direct. Most adult children and other non-spouse beneficiaries who inherit a retirement account no longer have the option to stretch withdrawals across their own lifetime. Instead, they face a firm deadline: the entire account balance must be withdrawn by the end of the tenth year following the original account owner's death. This rule replaced the prior "stretch IRA" strategy that allowed beneficiaries to take smaller, life-expectancy-based distributions over decades, dramatically reducing the annual tax burden.

The attorney emphasizes that the rules have shifted more than once in recent years, making it unreliable to act on guidance from even a few years ago. Depending on whether the original account owner had already begun required minimum distributions before death, some beneficiaries must also take annual withdrawals during the 10-year window rather than waiting until year ten to withdraw the entire balance. The article identifies the first weeks after inheriting an account as the most consequential period, when titling decisions and withdrawal planning choices lock in outcomes that are difficult or impossible to reverse.

What It Means

For California residents, inheriting an IRA carries both federal tax complexity and state income tax implications that compound the challenge. California taxes withdrawals from traditional IRAs as ordinary income at the state level. California does not impose a state estate or inheritance tax on inherited retirement accounts. However, every dollar withdrawn from an inherited traditional IRA counts as taxable income for federal and California state income tax purposes in the year it is taken. California's income tax rates reach among the highest in the nation, meaning a large lump-sum withdrawal in a single year can produce a combined federal and state tax bill that consumes a significant portion of the inherited account.

The strategic implication is significant. A beneficiary who inherits a $500,000 IRA and withdraws the entire balance in year one faces taxation on $500,000 of ordinary income in a single tax year. A beneficiary who spreads withdrawals evenly across the 10-year window takes $50,000 per year, which in many cases stays within a lower combined federal and California bracket. The optimal withdrawal schedule depends on the beneficiary's existing income, projected income changes over the decade, and whether other deductions or credits apply. This calculation becomes especially important for California residents who may also receive income from real estate, business interests, or other sources that already place them in higher brackets.

Surviving spouses receive meaningfully different treatment. A surviving spouse can often treat the inherited account as their own IRA, resetting the required minimum distribution timeline based on their own age. Certain other categories of beneficiaries — including those with a qualifying disability, chronic illness, or those who are not more than 10 years younger than the deceased — may also qualify for the more favorable life-expectancy distribution rules. California's community property framework adds another layer: California is a community property state, meaning retirement account assets accumulated during marriage may carry community property rights that affect how the account is characterized at death and who has valid claim to beneficiary designations. Spousal consent rules apply to retirement account beneficiary designations, and a designation that does not account for community property rights can create disputes during estate settlement. Understanding community property versus equitable distribution rules matters when evaluating inherited retirement accounts in California.

Titling errors represent one of the most common and costly mistakes. An inherited IRA must be retitled in a specific format — typically including the deceased owner's name and the beneficiary's name — to preserve its inherited status. A beneficiary who takes a distribution and then attempts to roll the funds into a new account loses the inherited IRA treatment entirely. The entire amount becomes taxable income immediately, and the 10-year rule no longer applies in the favorable sense — the money is simply gone from the tax-deferred environment. Missing a required annual withdrawal during the 10-year period triggers an excise tax penalty on the amount that should have been withdrawn. These are avoidable errors, but they require knowing the rules before taking action.

Beneficiary designation on the inherited account itself also deserves attention. An inherited IRA can name its own successor beneficiary. If the inheriting beneficiary dies during the 10-year distribution period without having named a successor, the remaining balance passes through the beneficiary's estate and may trigger accelerated distribution requirements. Naming a successor beneficiary on an inherited IRA is a straightforward administrative step that preserves flexibility for the beneficiary's own heirs. Families navigating these decisions alongside broader estate settlement responsibilities benefit from understanding what it means to be a beneficiary under both the retirement account rules and the broader estate plan.

Context from SimplyTrust

Inherited IRAs sit at the intersection of retirement account law, income tax planning, and estate administration — three areas that each carry their own deadlines and consequences. While an inherited IRA is not a probate asset when properly titled with a named beneficiary, it becomes part of the larger picture of settling a loved one's estate. Executors and successor trustees coordinating estate settlement alongside an inherited IRA benefit from a structured approach to tracking deadlines and responsibilities. The Estate Settlement Checklist provides a step-by-step framework for navigating the full scope of estate administration tasks, from gathering account information to coordinating with financial institutions and tax advisors.

For families working through the broader estate plan that surrounds a retirement account, understanding how assets like IRAs interact with wills, trusts, and beneficiary designations forms the foundation of sound planning. A retirement account with a named beneficiary passes outside of probate and outside of the terms of a will or trust — which means the beneficiary designation, not the estate plan document, controls who receives the account. Reviewing common estate planning mistakes that involve misaligned beneficiary designations helps families avoid the situation where a carefully drafted estate plan is undermined by an outdated IRA beneficiary form.

Source: You Inherited an IRA. Now What? Advice From a Santa Barbara Estate Attorney