Inheriting From a Grandparent: What You Need to Know (2026)

Inheriting from a grandparent is the third most common inheritance scenario — after parents and spouses — and one of the least-understood. The core tax rules (step-up basis, 10-year IRA rule) are the same as inheriting from a parent. But grandparent estates introduce additional wrinkles that catch beneficiaries off guard: trust structures with strings attached, generation-skipping transfer tax on large estates, property tax reassessment surprises in some states, and consequences for college financial aid if the grandchild is still a student.

This guide covers all of it with 2026 rules so you know what you're dealing with and what decisions need to happen now versus later.

How grandparent estates typically reach grandchildren

Unlike a parent's estate, which often leaves assets directly to children via beneficiary designations and a simple will, grandparents more commonly use structured vehicles:

Inherited IRA from a grandparent: the 10-year rule applies

If your grandparent had a traditional IRA, 401(k), or 403(b), you almost certainly fall into the least favorable distribution category under the SECURE Act.

You are a Non-Eligible Designated Beneficiary (NEDB)

The SECURE Act (IRC §401(a)(9)(H)) created a category called Eligible Designated Beneficiaries (EDBs) who can stretch distributions over their lifetime — but that category is narrow: surviving spouse, minor child of the account owner, disabled or chronically ill individuals, and persons not more than 10 years younger than the owner.¹

As a grandchild, you are almost certainly a Non-Eligible Designated Beneficiary. You must fully deplete the inherited IRA within 10 years of your grandparent's death. The exceptions — being disabled, chronically ill, or within 10 years of your grandparent's age — are uncommon for grandchildren.

Note on minor grandchildren: The "minor child of the account owner" EDB category applies only to the account owner's own minor children — not to grandchildren. A 10-year-old grandchild inheriting a grandparent's IRA is still an NEDB subject to the 10-year rule.

Annual RMDs may be required during years 1–9

The 2024 IRS final regulations (T.D. 10001) added an important rule: if your grandparent died after their Required Beginning Date (RBD), you must take annual required minimum distributions during years 1–9 in addition to fully depleting the account by year 10.²

The RBD is:

• Age 73 — for grandparents born between 1951 and 1959
• Age 75 — for grandparents born in 1960 or later

If your grandparent died before their RBD, no annual RMDs are required. You can take nothing for years 1–9 and distribute the entire account in year 10 — though that creates a massive single-year income event. Tax planning is critical.

Inherited Roth IRA from grandparent: the tax-free option

If your grandparent had a Roth IRA, you inherited a more favorable asset. The 10-year rule still applies, but no annual RMDs are required (Roth owners have no RBD, so T.D. 10001's annual RMD requirement doesn't apply to inherited Roth accounts). Distributions are tax-free if the Roth was open for at least 5 years before your grandparent's death. The optimal strategy is usually to defer all distributions to year 10, letting the balance compound tax-free for as long as possible. See Inheriting a Roth IRA: Rules, Tax Treatment & Smart Strategy.

Non-IRA assets: step-up basis works the same way

Brokerage accounts, real estate, and other capital assets you inherit from a grandparent get the same step-up in tax basis under IRC §1014 as they would from a parent. Your inherited cost basis equals the fair market value on the date of your grandparent's death — regardless of what they originally paid decades ago.³

Under IRC §1223(11), inherited assets automatically qualify for long-term capital gains treatment. In 2026, those rates are:⁴

• 0% — taxable income up to $49,450 (single) / $98,900 (MFJ)
• 15% — $49,451–$545,500 (single) / $98,901–$613,700 (MFJ)
• 20% — above $545,500 (single) / above $613,700 (MFJ)

A 3.8% Net Investment Income Tax (NIIT) also applies if your modified adjusted gross income exceeds $200,000 (single) or $250,000 (MFJ).

The practical result: if your grandparent held Apple stock purchased for $5,000 that was worth $200,000 at death, your inherited basis is $200,000. Sell within the year for $205,000 and your gain is $5,000 — not $195,000. The decades of appreciation are permanently erased from your tax picture.

Critical step: obtain a formal appraisal of the date-of-death value for any real estate, business interests, or non-publicly-traded assets. For publicly traded stock, FMV is the average of the high and low price on the date of death. Document everything now — you'll need it when you sell.

See Inheriting a Brokerage Account, Step-Up Basis: What It Is and How to Use It, and Step-Up Basis Tax Savings Calculator.

Generation-skipping transfer (GST) tax — when it applies

Transfers directly from a grandparent to a grandchild "skip" a generation and can trigger the federal generation-skipping transfer tax, a separate 40% tax imposed on top of (or instead of) gift and estate taxes.⁵

The practical reality for most grandchildren: you will not owe GST tax. The GST exemption in 2026 is $15 million per transferor, made permanent by the One Big Beautiful Bill Act (OBBBA, July 2025).⁵ Most grandparent estates fall well below this threshold.

For large estates where GST is a concern, grandparents often use a GST trust (dynasty trust): a trust structured to hold assets outside of beneficiaries' taxable estates at each generation, using the grandparent's GST exemption to shelter transfers. If you're receiving income or principal from such a trust, you are not receiving an outright inheritance — you have beneficial interests governed by the trust document. The trust itself is the "owner" of the assets.

State inheritance tax: grandchildren generally fare well

Five states impose a state-level inheritance tax: Kentucky, Maryland, Nebraska, New Jersey, and Pennsylvania. The good news for grandchildren: four of the five exempt grandchildren entirely.

• Kentucky: Grandchildren are Class A beneficiaries — fully exempt.
• Maryland: Direct-line descendants including grandchildren — fully exempt.
• Nebraska: Grandchildren are fully exempt under the 2023 LB 310 reform, which eliminated inheritance tax for immediate family members.
• New Jersey: Grandchildren are Class A beneficiaries — fully exempt.
• Pennsylvania: Direct descendants (children, grandchildren, great-grandchildren) pay 4.5%. This is the only one of the five states where a grandchild owes state inheritance tax.

The tax is based on where your grandparent lived, not where you live. See Inheritance Tax by State: A 2026 Guide for full rates and exemption tables, and use the Inheritance Tax Calculator to estimate your exposure if your grandparent was a Pennsylvania resident.

California Prop 19 and property tax reassessment

If your grandparent owned real estate in California, the property tax situation is more complicated than with a parent's home.

California's Proposition 19 (effective February 2021) allows a parent-to-child transfer of a family home with limited property tax reassessment — but that exclusion also extends to grandparent-to-grandchild transfers, with one important condition: the grandchild's parent who is the biological or adopted child of the transferring grandparent must be deceased at the time of the transfer.⁶

If your parent (the grandparent's child) is still alive, the grandparent-to-grandchild Prop 19 exclusion does not apply, and the property is reassessed at current market value — which can significantly increase annual property taxes on homes held for decades.

Even when the exclusion applies, it is capped: the property tax assessment can only be transferred up to $1,044,586 above the grandparent's assessed value (indexed; current for transfers through February 15, 2027). A home worth significantly more than the grandparent's assessed value plus this cap will be partially reassessed.

Other states have similar parent-child transfer exclusions that may or may not extend to grandchildren. Check with a local estate attorney before deciding whether to sell or hold inherited real estate.

College financial aid impact for student-age grandchildren

If you are a college student or upcoming student, inheriting money can affect your eligibility for need-based financial aid under FAFSA. The Student Aid Index (SAI) calculation counts assets and income:

• Inherited cash and brokerage assets: If held in your name, counted as student assets at 20% on the FAFSA — a higher rate than parental assets (5.64%). A $100,000 cash inheritance increases your SAI by $20,000, potentially reducing aid significantly.
• Inherited IRA: Retirement accounts are excluded from FAFSA asset calculations — your inherited IRA does not count as an asset. However, distributions from the IRA count as income in the year they are taken, which can affect aid for the following year.
• Trust distributions: Amounts distributed from a trust during an aid year are reported as untaxed income and can reduce aid eligibility for the next year.
• Grandparent-owned 529 plans: Starting with the 2024–25 FAFSA cycle, distributions from a grandparent-owned 529 plan no longer count as student income — a significant change from prior years.

Timing of asset transfers and distributions matters significantly if financial aid is at stake. An inheritance specialist and a college financial planning advisor can coordinate the two.

Your action timeline: first 90 days

Days 1–30

• File life insurance claims immediately — proceeds arrive within 30–60 days and are income-tax-free
• Request date-of-death valuations for all accounts (brokerage, IRA, real estate)
• Order a formal appraisal for real estate and non-publicly-traded assets — do this now, while the value is close to date-of-death and comps are fresh
• Do not sell inherited stock yet — understand step-up basis first
• Do not accept a check from an inherited IRA — non-spouse beneficiaries cannot do 60-day rollovers; this mistake cannot be undone (IRC §408(d)(3)(C))
• If inheriting through a trust, request a full copy of the trust document from the trustee and understand the distribution provisions

Days 30–90

• Open the inherited IRA as a properly titled beneficiary account: "[Your Name], beneficiary of [Grandparent's Name]" — the transfer must go directly from the grandparent's IRA custodian to a beneficiary IRA at your chosen institution
• Determine if your grandparent died before or after their Required Beginning Date (age 73 for those born 1951–1959; age 75 for born 1960+) — this determines whether annual RMDs apply to you
• If other grandchildren are also inheriting IRA assets, understand the December 31 separate-account deadline: inherited IRAs must be split into separate beneficiary accounts by December 31 of the year following the year of death to use individual life expectancy calculations for RMD purposes
• Map out your 10-year distribution window and tax bracket trajectory — this informs whether to take more early or defer
• For California real estate, determine whether the Prop 19 parent exclusion applies (is the grandchild's parent deceased?)
• If a Pennsylvania estate, calculate the 4.5% state inheritance tax exposure — it may be deducted from the estate before distribution
• If you are a college student, review timing of distributions and asset transfers with a financial aid advisor

Why the first 90 days matter so much

The inherited IRA rollover error (accepting a check instead of a direct transfer) is immediate and permanent. The separate-account deadline for splitting IRAs among multiple grandchildren has a hard cutoff. The step-up basis window for real estate is most valuable when acted on quickly. The 9-month disclaimer deadline — your right to refuse an inheritance and redirect it to the next beneficiary tax-free — runs from date of death (see How to Disclaim an Inheritance).

Grandparent inheritances often involve more complexity than parent inheritances because of trust structures and the generational gap in planning assumptions. The rules haven't been explained to most grandchildren before the event. Getting a specialist who handles inheritance planning regularly — not a generalist who sees one or two of these a year — is worth the cost.

Get matched with an inheritance planning specialist

If you've recently inherited from a grandparent — IRA, real estate, trust assets, or a mix — a fee-only advisor who specializes in inheritance planning can map your 10-year IRA strategy, confirm your step-up basis documentation, review your trust rights, and coordinate with a CPA on the tax picture. Most of these decisions need to be made in the first 90 days.