Managing Inherited UHNW Wealth

Not tax or legal advice. Your facts differ from every example in this guide. Work with qualified estate attorneys, CPAs, and a fee-only financial advisor before acting.

Inheriting $30 million or more is simultaneously one of the most significant wealth events a person can experience and one of the least-prepared-for. Unlike a business exit — where founders spend months in planning mode — inheritance is sudden. The estate's advisors are working for the estate, not for you. The investment portfolio reflects someone else's risk tolerance and tax situation. The trust documents may impose constraints you have never read.

The decisions made in the first 12 months after a large inheritance are among the highest-stakes financial decisions you will ever face. Getting step-up-in-basis planning wrong means paying capital gains taxes on gains that could have been eliminated entirely. Failing to understand inherited IRA distribution rules can trigger a tax bill that runs seven figures. Moving too quickly to restructure a portfolio before understanding the underlying positions can crystallize unnecessary gains.

This guide covers what actually matters when inheriting at the UHNW level — the tax landscape, the trust mechanics, the investment transition, and how to build an advisory team that works for you.

The first 90 days

Resist the urge to make irreversible decisions immediately. The estate cannot be fully settled for months. Some assets — private equity interests, closely-held business shares, real estate — require formal appraisals before you can know what you inherited and at what tax basis. Key actions for the first 90 days:

• Engage your own advisors, not just the estate's. The estate attorney, CPA, and executor represent the estate and all beneficiaries collectively. You need independent counsel — particularly if the estate is contested, if you're a trustee as well as a beneficiary, or if your interests differ from those of other beneficiaries.
• Locate and read all trust documents. If assets are held in trust, understand the distribution standard (mandatory vs. discretionary), the trustee's investment authority, any power of appointment you hold, and any restrictions on distributions for specific purposes.
• Identify every asset and its form of title. Financial accounts, real property, business interests, alternative investments (PE, hedge fund LP interests), life insurance policies, deferred compensation, and retirement accounts each have different transfer mechanics, tax treatment, and liquidity profiles.
• Document the date-of-death values for everything. These become your step-up basis. Errors or omissions here are expensive and difficult to correct later.
• Don't liquidate concentrated positions reflexively. Inherited stock often carries a zero-cost basis in the hands of the estate — but gets a full step-up to date-of-death fair market value for the beneficiary. Selling immediately makes sense only after confirming the basis and modeling the alternatives.

The tax landscape after a large inheritance

Understanding the three distinct tax questions that arise in a large inheritance prevents expensive confusion.

1. Estate tax (not your problem — the estate's)

Federal estate tax is paid by the decedent's estate, not by beneficiaries directly. The 2026 federal exemption is $15 million per person — permanently set by the One Big Beautiful Bill Act (OBBBA, July 2025).¹ Assets above the exemption are taxed at a flat 40% rate. A married couple who fully used portability can pass $30M federal estate-tax-free.

If the estate was large enough to owe estate tax, that tax was paid before you received your share. What you receive is after estate-tax wealth. You are not paying the 40% rate on what you inherit.

2. Income tax on inherited assets (step-up is your friend)

For most inherited assets — publicly traded stocks, mutual funds, real estate, closely-held business interests — you receive a step-up in cost basis to the fair market value on the date of death.² If you then sell those assets, you owe capital gains tax only on appreciation that occurred after the date of death.

3. Income in Respect of Decedent (IRD)

Certain assets do not receive a step-up. IRD items represent income the decedent earned but never paid income tax on. You inherit those assets at a carryover basis (or zero basis) and owe income tax when you receive the income. The most significant IRD assets at UHNW scale: traditional IRAs and 401(k)s, deferred compensation balances, and installment sale receivables.

Step-up in basis: your most valuable tax asset

The step-up in basis under IRC §1014 is the single most valuable tax benefit in the U.S. tax code for inherited assets.² Consider what it means at UHNW scale:

• A $20M block of Apple stock purchased at an average cost of $500K has $19.5M of embedded gain. The decedent never paid capital gains on that appreciation. At death, the basis steps up to $20M. The beneficiary who receives it and immediately sells owes capital gains tax on zero gain — the $19.5M of lifetime appreciation is permanently excluded from income tax.
• A family home worth $8M with an original purchase price of $400K carries $7.6M of gain. After the step-up, the beneficiary receives an $8M cost basis. Future appreciation above that amount is the only taxable gain.
• A real estate portfolio with a depreciated tax basis (after 20 years of depreciation deductions) may have significant embedded recapture gain. The step-up eliminates the recapture entirely — the new basis is fair market value, regardless of how much depreciation the decedent took.

At the UHNW level, proper management of the step-up is worth more in tax savings than virtually any other strategy. This is why the reflex to immediately liquidate an inherited portfolio deserves scrutiny: you may be receiving a portfolio with a full date-of-death step-up, meaning there is no embedded capital gain to escape. The question becomes what the portfolio looks like on a go-forward basis — not whether selling eliminates a tax liability, because in most cases it doesn't.

Direct indexing with stepped-up basis

If you inherit a large concentrated mutual fund position with a stepped-up basis, transitioning to a direct indexing SMA is particularly efficient. The stepped-up basis gives you a clean starting point — no embedded gain to navigate on the transition. Direct indexing then generates systematic tax-loss harvesting on individual securities within the index, potentially adding 0.5–2.0% annually in after-tax alpha at $10M+ SMA minimums. See our Direct Indexing guide for the mechanics.

Income in Respect of Decedent: what doesn't get a step-up

IRD assets are the exception to the step-up rule and carry significant tax implications for UHNW beneficiaries.

Traditional IRAs and 401(k)s. These are the most common high-value IRD assets. Every dollar distributed from an inherited traditional IRA or 401(k) is taxed at ordinary income rates — federal plus state. For a UHNW beneficiary in the 37% bracket, that's a 37% federal rate on every distribution, plus state income tax (up to 13.3% in California). There is no capital gains treatment, no step-up in basis, and no way to convert the income character of the distributions.

Deferred compensation (NQDC). If the decedent had an outstanding NQDC balance, it passes to the beneficiary as ordinary income when distributed. The beneficiary pays income tax at their marginal rate, not the decedent's rate. At UHNW scale, this can be millions of dollars in ordinary income over a compressed timeframe.

Installment sale receivables. If the decedent was receiving installment payments on a business sale, those receivables pass to the beneficiary at a carryover basis. Each payment received has the same income-to-basis ratio as it would have in the decedent's hands. IRD income at receipt.

Inherited IRA rules at UHNW scale

The rules governing inherited IRAs changed dramatically with the SECURE Act (2019) and were further clarified by IRS final regulations (T.D. 10001, July 2024).³ Most non-spouse beneficiaries of UHNW estates will face the 10-year rule.

The 10-year rule

Non-Eligible Designated Beneficiaries (NEDBs) — which includes adult children who are not disabled or chronically ill, and most non-spouse beneficiaries — must empty the inherited IRA by the end of the 10th year following the decedent's death.⁴ There is no required minimum distribution schedule within those 10 years, with one important exception.

Annual RMDs when the decedent was past the required beginning date

T.D. 10001 confirmed what the IRS proposed in 2022: if the decedent was past their required beginning date (RBD) for RMDs at the time of death, the beneficiary must take annual RMDs in years 1–9 of the 10-year period — not just clear the account by year 10.³ The annual RMD is calculated using the beneficiary's life expectancy from the Single Life Table, reduced by one each year.

For UHNW beneficiaries inheriting a $5M+ traditional IRA from a parent who was past RBD, this creates a structured multi-year ordinary income stream that must be managed proactively:

• Roth conversion coordination. If you have your own Roth conversion capacity (room under the 37% bracket ceiling), the inherited IRA distributions effectively fill that room. The question is whether to also do your own Roth conversions in the same year — which depends on your total marginal rate picture across all income sources.
• State income tax timing. If you are in the process of changing domicile from a high-tax state, timing inherited IRA distributions to fall in low-tax or no-tax years can save substantial state income tax. See our State Tax Domicile Change guide.
• IRMAA management. Large IRA distributions push MAGI above IRMAA thresholds and increase Medicare Part B and Part D premiums. At UHNW scale, this is rarely a primary consideration — but it should be part of the complete income picture your advisor models.

Inherited Roth IRAs

Inherited Roth IRAs are also subject to the 10-year rule for NEDBs. However, qualified distributions from an inherited Roth IRA are income-tax-free — the 10-year rule forces distribution timing, but the income tax on growth never applies.⁴ Roth IRAs at UHNW scale are often smaller relative to traditional balances, but if they are large, there is a strong argument to let them grow for the full 10 years before the mandatory complete distribution in year 10.

Trust beneficiary mechanics

At UHNW levels, assets are frequently held in trust rather than outright. Beneficiaries of irrevocable trusts face a different set of considerations than beneficiaries who inherit assets outright.

Distribution standards

The trust document governs what distributions you can receive and when. The two main standards:

• Mandatory income distributions. The trust must distribute all income (dividends, interest, rents) annually. You receive a K-1 and pay tax on your share of trust income at your own rates.
• Discretionary principal distributions. The trustee has discretion to distribute principal for your health, education, maintenance, and support (HEMS standard), or on an even broader "sole discretion" basis. HEMS is a common drafting standard — but the trustee's interpretation of "maintenance and support" relative to your UHNW lifestyle matters significantly.

Trust income tax rates

Undistributed trust income faces compressed federal income tax brackets. In 2026, the 37% federal bracket applies at approximately $16,100 of undistributed trust taxable income — a threshold reached immediately by most UHNW trusts. Trustees of well-drafted trusts typically distribute income to beneficiaries to shift taxation to the beneficiary's rate. If you are a beneficiary receiving trust income, that income is taxed at your personal marginal rate. If the trust retains income, it's taxed at 37% almost immediately. There is almost never a tax argument for the trust retaining ordinary income.

Directed trusts and trust protectors

Many modern UHNW trusts are drafted as directed trusts, where an independent investment advisor directs investment decisions separately from the distribution trustee. If the trust was set up in a directed trust jurisdiction — South Dakota, Delaware, Nevada — the investment direction function may already sit with a fee-only advisor who can be replaced. Understanding the directed trust structure in the governing document tells you who has the power to change investment managers, which is important if the inherited portfolio does not reflect your needs.

Investment transition at scale

Inheriting a $40M investment portfolio is not the same as receiving $40M in cash. The portfolio reflects decisions made by the decedent — their risk tolerance, tax situation, liquidity preferences, and relationships with advisors. Your first job is to understand the portfolio before deciding whether to change it.

Asset types and transition complexity

• Public equities: Generally liquid. If held in a taxable account with a stepped-up basis, there is no embedded capital gain; rebalancing can be done without tax cost. Focus on whether the current allocation fits your risk profile and time horizon.
• Concentrated single-stock positions: Even with a stepped-up basis, a 60% allocation to one company creates risk. After the step-up eliminates the embedded gain, systematic diversification through staged sales, exchange funds, or direct indexing is often appropriate. See our Concentrated Stock guide.
• Private equity and venture capital LP interests: These cannot be easily transferred or liquidated. Most LP agreements require GP consent for transfers. You inherit the position as-is, including the capital call obligations, the J-curve, and the illiquidity. You need to understand the existing vintage years, the remaining capital commitment schedule, and the estimated hold period before deciding on any secondary market sale.
• Real estate: Inherited real property receives a step-up in basis and a reset of the depreciation schedule. Existing mortgages typically need to be assumed or refinanced. Decision: hold for income, sell with the stepped-up basis now, or transfer into a 1031 exchange to defer any future appreciation.
• Hedge fund interests: Similar to PE — not freely transferable. Many hedge funds allow for quarterly or annual redemptions. The redemption proceeds are taxed at the fund's income character (some combination of short- and long-term gains, interest, and dividends), though the step-up means your cost basis for calculating gain on redemption starts at the inherited value.

Timeline expectations

A realistic complete portfolio transition at UHNW scale — moving from the inherited structure to your target allocation — typically takes 18–36 months. Alternative investment positions cannot be forced; they unwind on their own schedule. This is not a problem if you plan for it: build the target allocation in your liquid portfolio while the illiquid positions run off over time.

Your own estate plan now

Inheriting significant wealth triggers an immediate need to revisit or create your own estate plan. If you did not previously have a taxable estate, you likely do now. With a $15M federal exemption per person (permanently set under OBBBA), single individuals who inherit $20M need to think about estate planning immediately. Married couples have $30M combined — still not enough to protect a $40M inheritance if you have your own assets on top.

Key planning actions to consider:

• Fund a revocable living trust to avoid probate and allow for continuity of management if you become incapacitated.
• Use the annual gift exclusion ($19,000 per recipient in 2026) to begin transferring appreciation. If the inherited estate pays a significant valuation discount (closely-held business interests, illiquid real estate), transferring those assets through an FLP or GRAT before the value increases captures the discount permanently.
• Consider a SLAT or IDGT if you have a taxable estate. Establishing an irrevocable trust now — before appreciation — moves future growth outside your estate. See our UHNW Estate Planning guide for mechanics.
• Review beneficiary designations on any inherited IRA you rolled over (if you are a surviving spouse), your own retirement accounts, and any life insurance policies that passed to you. Inherited-IRA rules make beneficiary designation choices particularly consequential for your heirs.

Building your advisory team

Managing UHNW inherited wealth requires a team of specialists — no single advisor handles all of it. The standard team:

• Estate attorney: Drafts or revises your governing documents (revocable trust, will, POA, healthcare directive, any irrevocable trusts). Guides trust administration decisions for any trusts you inherit trustee responsibilities over.
• CPA / tax advisor: Files your return, calculates IRD deductions, handles K-1s from trust and partnership interests, advises on inherited IRA distribution timing, and models state-income-tax scenarios if you are a trust beneficiary in multiple states.
• Fee-only investment manager or RIA: Manages your liquid portfolio (taxable accounts, IRAs). At UHNW levels, the fee-only model is critical — wirehouse advisors earn commissions on products and are not legally required to prioritize your interests.
• Fee-only financial advisor (coordinator): Integrates the above. Builds the total financial picture: net worth, income projection, estate tax exposure, philanthropic capacity, long-term cash flow. Coordinates the estate attorney, CPA, and investment manager around a shared plan instead of each optimizing their silo independently.

The fee-only advisor's role

A fee-only financial advisor who specializes in UHNW wealth serves as the integrating layer for newly inherited wealth. The specific value they provide:

• Tax basis inventory: Works with the estate CPA to document every asset's stepped-up basis before any position is sold. Prevents expensive basis errors.
• IRD modeling: Maps out the inherited IRA distribution schedule under the 10-year rule, calculates the §691(c) deduction, and models the optimal distribution timing relative to your other income.
• Alternative investment assessment: Reviews the capital commitment schedule on PE/VC positions, models the liquidity timeline, and determines whether your liquid portfolio is sized appropriately relative to future capital calls.
• Estate plan integration: Translates the estate attorney's drafting decisions into financial-model terms — what does this trust structure mean for your cashflow, estate tax exposure, and Roth conversion window?
• MFO vs. fee-only RIA decision: At $30M–$150M, a coordinating fee-only RIA is often the right structure. Above $100M, a multi-family office may be worth evaluating. A fee-only advisor can model the cost-benefit of each for your specific situation. See our MFO vs. Fee-Only RIA guide.

Sources

1. IRS — Estate Tax. Federal estate tax applies at 40% to taxable estates above the applicable exclusion amount. The OBBBA (July 2025) permanently set the exclusion at $15M per person, indexed for inflation thereafter. Portability election allows surviving spouses to use any unused exclusion of the deceased spouse.
2. IRS Publication 559 — Survivors, Executors, and Administrators (2025 edition). Comprehensive guide to inherited asset treatment including step-up in basis under §1014, IRD under §691, and the §691(c) estate tax deduction for IRD income. Authoritative source for beneficiary income tax obligations.
3. T.D. 10001 — Required Minimum Distributions Final Rule (IRS, July 2024). Finalizes the requirement that non-EDB beneficiaries must take annual RMDs in years 1–9 of the 10-year period when the decedent died after reaching their required beginning date (RBD). Corrects ambiguity from the 2019 SECURE Act.
4. IRS — Required Minimum Distributions for IRA Beneficiaries. Explains the 10-year rule for non-EDBs, the eligible designated beneficiary (EDB) exceptions (surviving spouse, disabled or chronically ill individuals, minor children of the decedent, and beneficiaries not more than 10 years younger than the decedent), and the rules for inherited Roth IRAs.
5. Kitces — The Inherited IRA 10-Year Rule and Annual RMD Requirement After T.D. 10001. Michael Kitces analysis of the annual RMD requirement for inherited IRAs, the distinction between decedent pre-RBD and post-RBD, and planning strategies for NEDB beneficiaries. Cross-checks with IRS guidance above.

Federal estate tax exemption and rates verified as of May 2026 (OBBBA permanent exemption $15M per person). Inherited IRA rules reflect the SECURE Act (2019), SECURE 2.0 (2022), and final regulations T.D. 10001 (July 2024). Trust income tax bracket thresholds are 2026 IRS figures indexed for inflation annually. Consult qualified estate counsel and a CPA before making any decisions based on information in this guide.