Executor of an Estate: Duties, Timeline & HNW Checklist (2026)

Being named executor of a large estate is an honor — and a significant legal responsibility. You're the person who marshals assets, pays valid debts, files tax returns, and distributes the estate to beneficiaries, all while complying with state probate law and hard IRS deadlines. For a $5M–$30M+ estate, the complexity dwarfs what most executors expect. This guide covers every major duty, the timeline from death to final distribution, and the HNW-specific pitfalls that can cost an estate millions before anyone realizes what happened.

What is an executor?

An executor (called a "personal representative" in most states) is the person named in a will to carry out its instructions. If there's no will — or if the named executor can't or won't serve — the probate court appoints an administrator instead, following the state's intestacy priority list (typically surviving spouse first, then children, then other relatives).

The executor receives authority from the probate court via a document called Letters Testamentary (or Letters of Administration if no will). Banks, brokerages, and government agencies require these letters before they'll discuss the decedent's accounts. Obtaining them is typically your first significant task after filing the will with probate court.

Executor vs. trustee: the critical distinction

For HNW estates, this distinction is essential. Many executors are surprised to discover that most of the estate's assets are in a revocable trust, not the probate estate — meaning the trustee controls the lion's share of the wealth, while the executor handles a smaller probate component. The roles have completely different scopes and legal authorities.

The same person frequently serves as both executor and successor trustee. But the roles are legally separate and require separate actions, separate record-keeping, and different fiduciary duties.

Core executor duties

1. Secure and inventory assets

Your first practical task: secure the decedent's property to prevent loss or deterioration. For an HNW estate this means securing the physical residence (change locks if unsecured), notifying insurance companies to keep policies active, and freezing investment accounts at the broker to prevent unauthorized access. Then build a complete inventory of every probate asset — real estate, bank accounts, taxable brokerage accounts, closely-held business interests, personal property, and receivables. Non-probate assets (IRAs, trust assets, life insurance) should be inventoried too, because you'll need the full picture for Form 706 analysis even if they're not in your control.

2. File the will and open probate

The will must be filed with the probate court in the county where the decedent was domiciled. The court will admit the will to probate, appoint you as executor, and issue Letters Testamentary. Most states require probate to begin within 30–60 days of death, though formal deadlines vary. For large estates, retain a probate attorney before filing — the process has state-specific procedural requirements that differ meaningfully across jurisdictions.

3. Notify creditors and publish notice

Most states require the executor to notify known creditors and publish a legal notice in a local newspaper to flush unknown creditors. This starts a creditor claim window (typically 3–6 months depending on the state) after which you can begin distributions without fear of personal liability for undiscovered creditor claims. Do not skip this step — paying distributions before the creditor period closes can leave you personally liable for legitimate claims the estate can't pay.

4. Open an estate bank account

Open a dedicated estate checking account using the estate's EIN (from the IRS, obtained via Form SS-4). All estate income is deposited here; all estate expenses are paid from here. Never comingle estate funds with personal funds — doing so is a fiduciary breach and a recordkeeping nightmare. Keep meticulous records of every transaction; you'll need them for the estate income tax return and final accounting to beneficiaries.

5. Manage assets until distribution

You have a fiduciary duty to preserve estate assets, not maximize returns. That said, you should not leave significant assets in a low-yield account for two years — prudent investment of estate funds is required. Consult the estate attorney or a financial advisor on what standards apply in your state. For closely-held business interests, you may need to actively participate in management decisions or hire someone qualified to do so during administration.

6. File the decedent's final individual income tax return

The decedent's final Form 1040 covers January 1 through the date of death. It's due April 15 of the year after death (or the next business day if April 15 falls on a weekend), with a Form 4868 extension available for six additional months. The surviving spouse (if any) may still file as Married Filing Jointly for the year of death.

7. File the estate income tax return (Form 1041)

Once you open the estate, it becomes a separate taxable entity. Any income earned by estate assets after the date of death — interest, dividends, rental income, capital gains from asset sales — must be reported on Form 1041 (U.S. Income Tax Return for Estates and Trusts). For most estates, Form 1041 must be filed if gross income exceeds $600/year. Note: trust income tax brackets are extremely compressed — estates reach the 37% federal rate at approximately $15,200 of taxable income in 2026.¹ Distributing income to beneficiaries before year-end passes the tax to them at potentially lower rates (via a Schedule K-1), which is usually advantageous if the estate is expected to be open for more than one calendar year.

8. Pay valid debts, expenses, and taxes

The estate is responsible for final medical bills, funeral expenses, outstanding debts, and administration costs (attorney and CPA fees, appraisal fees, executor compensation). Pay in the priority order your state requires — typically funeral expenses, then taxes, then general creditors, then legacies. Do not pay distributions until valid claims are resolved. If the estate is insolvent (liabilities exceed assets), some creditors may not be paid in full; consult an attorney before paying anyone.

9. Obtain date-of-death valuations

Every asset in the gross estate must be valued as of the date of death for estate tax and income tax purposes. For publicly traded securities, date-of-death is the average of the high and low trading prices on the date of death. For real estate, closely-held business interests, and other illiquid assets, you need a qualified appraisal by a certified appraiser. For HNW estates, the IRS scrutinizes valuations of closely-held businesses and real estate closely — use a qualified independent appraiser and document methodology.

There is also an alternate valuation date option under IRC §2032: if the estate qualifies, you can use valuations 6 months after death (or on the date of distribution if earlier) instead of the date of death. This makes sense only if asset values declined after death AND the alternate date values produce a lower estate tax. The election must be consistent — you can't cherry-pick high-value assets at one date and low-value assets at the other.

10. File Form 706 and the portability election

This is the highest-stakes deadline for married HNW estates. See the HNW complications section below.

11. Distribute assets to beneficiaries

After debts are paid, tax returns are filed, and the estate tax is resolved (if applicable), you distribute the remaining assets per the will's instructions. Get signed receipts from each beneficiary. File the final accounting with the court if your state requires it. Once all distributions are complete and confirmed, you petition the court to formally close the estate and discharge your duties as executor.

Executor timeline: phase by phase

HNW-specific complications

The portability election — the most valuable 9-month deadline

This is the single most important executor action for a married decedent's estate — and the one most often missed.

Under IRC §2010(c)(5)(A), the unused portion of a deceased spouse's federal estate tax exemption can transfer to the surviving spouse — but only if the executor files Form 706 within 9 months of death (or obtains a timely extension via Form 4768). In 2026, with each individual having a $15M exemption,² a deceased spouse who used none of their exemption during life leaves up to $15M in Deceased Spousal Unused Exclusion (DSUE) — worth up to $6M in estate tax savings for the surviving spouse's estate (40% × $15M).

This election is required even when no estate tax is due. An estate worth $8M has no current tax — but without a Form 706 election, the surviving spouse loses a $15M DSUE that would have shielded their eventual estate. Many executors skip Form 706 thinking "no tax means no filing" and cost the family millions.

If the 9-month deadline is missed, Rev. Proc. 2022-32 allows a simplified late election for up to 5 years after death, but this requires a protective filing and has conditions. The 9-month deadline is by far the simpler path.

Form 706 filing when estate tax is due

Form 706 is required when the gross estate (all assets at date of death, including life insurance proceeds and lifetime taxable gifts) plus adjusted taxable gifts exceeds the applicable exclusion amount — $15,000,000 in 2026 (per OBBBA).² Form 706 is due within 9 months of death; Form 4768 extends both the filing deadline (6 months) and the payment deadline (can also be granted for reasonable cause).

For illiquid estates — closely-held businesses, real estate, farm property — IRC §6166 allows estate tax to be paid in installments over up to 14 years if the business interest exceeds 35% of the gross estate. The election must be made on a timely Form 706.

IRA and retirement accounts: the executor does NOT control them

This is widely misunderstood. IRAs, 401(k)s, and other retirement accounts are not part of the probate estate. They pass directly to named beneficiaries, outside the executor's authority. The executor's role is limited to: (1) notifying the plan administrator of the death, and (2) ensuring proper beneficiary designations are in place. Do not retitle IRAs into the estate — doing so creates a taxable event and destroys the ability for beneficiaries to take distributions over the 10-year rule under SECURE 2.0.³

One executor action that does matter: if IRAs are a large part of the estate, the executor should advise beneficiaries to review the 10-year rule and annual RMD requirements before making distribution decisions. If the decedent had already begun RMDs (was past their Required Beginning Date), beneficiaries must take annual RMDs in years 1–9 of the 10-year period under T.D. 10001.⁴

Multi-state real estate (ancillary probate)

Real property located in a state other than the decedent's domicile must go through ancillary probate in that state. A family with a primary home in New York, a vacation home in Florida, and a rental property in Arizona may need three separate probate proceedings. Each requires its own attorney, court filings, and Letters Testamentary from that state's court. This is one of the primary reasons HNW families use revocable living trusts — property held in the trust at death avoids ancillary probate entirely.

Closely-held business interests

If the decedent owned a business, partnership interest, or closely-held shares, the executor must:

• Obtain a qualified business valuation for estate tax and Form 706 purposes
• Review operating agreements or shareholder agreements for transfer restrictions and buy-sell provisions
• Ensure the business continues to operate — the executor may need to make management decisions or hire interim management
• Consider FLP/LLC valuation discounts (minority interest, lack of marketability) if applicable — but only if properly documented before death

GST exemption allocation

If the estate includes gifts or bequests to grandchildren or more-remote descendants (or trusts that can benefit them), the executor may need to allocate GST exemption on Form 709 or Form 706 to shield those transfers from the 40% generation-skipping transfer tax.⁵ Automatic allocation rules under IRC §2632 apply in some situations, but are not always optimal — an estate attorney should review the allocation before Form 706 is filed.

State estate tax coordination

Thirteen states plus DC impose their own estate taxes at exemptions far below $15M — some as low as $1M. Many HNW estates that owe no federal estate tax still owe state estate tax. Each state has its own filing deadline and Form 706 equivalent. If the decedent was domiciled in one of these states, work with an attorney familiar with that jurisdiction.

Executor compensation

Executors are entitled to reasonable compensation for their work — this is not a gratuitous service. Compensation is set by state law, typically calculated as a percentage of the estate's gross value or as "reasonable" compensation based on the complexity of the administration.

Executor compensation is taxable income to the executor, reportable on the executor's individual Form 1040. If the executor is also an heir, they can waive compensation to avoid income tax on funds they'd otherwise inherit tax-free — but this trade-off depends on estate tax exposure and the executor's personal tax bracket. Get advice before deciding.

Executor liability

Executors are personally liable for mistakes that harm the estate or beneficiaries. The most common liability exposures:

• Paying beneficiaries before creditor claims are resolved — you can be personally liable if the estate later can't pay valid debts
• Missing the portability election deadline — courts have held executors liable for the lost DSUE amount in some cases
• Failing to file required tax returns — the IRS holds executors personally liable for unpaid estate tax when the estate had assets sufficient to pay
• Imprudent investment of estate assets — holding volatile concentrated positions without diversification during long administrations creates risk
• Self-dealing — purchasing estate assets yourself, making decisions that benefit you at the estate's expense, or failing to act impartially among beneficiaries

Executor liability insurance (surety bonds) is required in some states or by will terms, and optional in others. For large or complicated estates, most estate attorneys recommend obtaining a bond even when not required — the cost is typically an estate expense.

When to hire a financial advisor as executor

Many executors handle small estates themselves with just an estate attorney. For HNW estates with complex financial assets, the analysis gets sophisticated quickly. A fee-only financial advisor with estate planning experience helps with:

• Estate tax modeling — estimating Form 706 liability before it's due, identifying elections and deductions that reduce tax
• Portability election analysis — modeling whether portability or a credit shelter trust produces better long-term tax outcomes for the surviving spouse
• IRA distribution strategy — advising beneficiaries on whether to take distributions front-loaded, back-loaded, or evenly across the 10-year rule window based on their income situation
• Investment management during administration — managing estate assets under the prudent investor standard while the estate is open
• Business interest valuation coordination — engaging and reviewing qualified appraisers for closely-held business interests
• Beneficiary coordination — helping beneficiaries understand what they're inheriting, the tax implications, and how it fits their own financial plan

The advisor works alongside the estate attorney (not instead of them). The attorney handles legal filings and court proceedings; the advisor handles the financial analysis and beneficiary coordination. Both are typically paid from the estate as administration expenses, which are deductible on Form 706.

7 executor mistakes that cost large estates millions

1. Missing the portability election deadline

An executor who tells a surviving spouse "no estate tax is due, we don't need to file Form 706" may have just cost that family $6M in future estate tax (40% × $15M unused exemption). File Form 706 or Form 4768 within 9 months of every married decedent's death, regardless of estate size. This is an almost costless insurance policy against one of the most expensive executor errors.

2. Retitling IRAs into the estate

IRAs are not probate assets. If no beneficiary is named (or the beneficiary designation is invalid), the IRA passes to the estate by default — but that doesn't mean the executor should proactively retitle IRAs. The estate is treated as a non-individual beneficiary, which means the 10-year rule applies with no annual RMD requirement, but if the decedent was past their Required Beginning Date, even more compressed distribution rules apply. Always consult an attorney before touching retirement account titles.

3. Distributing assets before creditors are cleared

Executors who are eager to get funds to beneficiaries quickly sometimes distribute before the creditor window closes. State law protects executors who publish proper notice and wait the required period — but distributing early to heirs can leave the executor personally liable for valid creditor claims the estate can't cover after the fact.

4. Undervaluing (or overvaluing) estate assets

For large estates, the IRS scrutinizes valuations intensively. Undervaluing business interests or real estate to reduce Form 706 tax exposes the estate to IRS penalties (up to 40% accuracy-related penalty under IRC §6662 for gross valuation misstatements). Overvaluing assets to maximize the step-up in basis for heirs can trigger different issues. Use qualified, independent appraisers and document methodology thoroughly.

5. Forgetting about state estate tax

An executor focused on the $15M federal threshold may overlook that the decedent's domicile state has a $1M–$4M exemption and a separate filing requirement with its own deadline. A $7M estate in Massachusetts, Washington, or Oregon owes meaningful state estate tax even though federal tax is zero. The filing deadlines often differ from Form 706 deadlines.

6. Not coordinating with the trustee

The executor controls the probate estate; the trustee controls the trust estate. When the same person serves both roles, these duties can blur. When different people serve, coordination failures create gaps: whose responsibility is it to notify beneficiaries? Who pays the estate tax when the taxable estate includes trust assets? Who files Form 1041 for the estate vs. Form 1041 for the trust? These questions need a clear agreement between executor and trustee, documented early in administration.

7. Failing to document decisions

Executors who make judgment calls without written documentation — why they chose one appraiser, why they made a particular investment decision, why they delayed a distribution — are vulnerable to beneficiary disputes later. Document every significant decision with a brief written memo. Courts and beneficiaries can second-guess decisions made years ago; a paper trail showing reasonable process protects you even when outcomes weren't perfect.