New York Estate Tax Return: Filing Form ET-706 and Meeting the Nine-Month Deadline

When a New York estate exceeds the state's basic exclusion amount, the executor must file Form ET-706 — the New York State Estate Tax Return — with the Department of Taxation and Finance. This is a separate filing from the federal estate tax return, operates under its own rules, and carries a nine-month deadline from the date of death that does not align with any income tax calendar.

Missing this deadline or mishandling the cliff calculation doesn't just result in penalties. For estates with real estate or cooperative apartments, getting this wrong can freeze property sales indefinitely.

When ET-706 Filing Is Required

The ET-706 is required when the New York gross taxable estate exceeds $7,350,000 in 2026. This threshold is the state basic exclusion amount, indexed for inflation each January 1.

The New York gross taxable estate includes more than just what the decedent owned at death:

• All assets in the decedent's sole name
• Certain jointly held assets depending on how title was structured
• Life insurance payable to the estate
• Taxable gifts made within three years of death — the three-year addback rule

That last item is critical. If the decedent made $600,000 in taxable gifts in 2024 and died in 2026, that $600,000 is added back into the New York gross estate for ET-706 calculation purposes — even though the money was transferred two years ago and the recipients already have it. An estate that appears to be $6.9 million on paper may actually be $7.5 million once gifts are included, pushing it above the threshold.

Typical non-probate assets — retirement accounts with named beneficiaries, jointly titled bank accounts with right of survivorship, life insurance payable to a named beneficiary — are generally excluded from the New York gross estate. Confirm the ownership structure of each asset before drawing this conclusion.

The Nine-Month Deadline

Form ET-706 is due nine months after the date of death. This deadline is fixed to the death date, not to any calendar year or income tax cycle.

A person who died March 10, 2026, has an ET-706 due December 10, 2026. A person who died October 5, 2026, has a deadline of July 5, 2027 — which falls in the middle of the following tax year's income filing season.

Executors managing simultaneous income tax obligations and estate tax obligations often find the deadlines converging in unexpected ways. Build a master deadline calendar early in the administration process.

Extensions: Form ET-133

If the estate cannot be fully valued or the return cannot be completed within nine months, the executor can file Form ET-133 (Application for Extension of Time to File and/or Pay Estate Tax) for a six-month extension. This must be filed before the original nine-month deadline expires.

The extension gives additional time to file the return. It does not extend the time to pay.

Any estimated tax owed must still be paid by the original nine-month deadline. Filing ET-133 with no payment when the estate owes tax results in interest accruing from the nine-month mark, plus potential failure-to-pay penalties on the unpaid balance.

Executors who are uncertain whether the estate will owe tax should still consider filing ET-133 if the nine-month period is approaching without a confirmed valuation. It's easier to pay an estimated amount and reconcile later than to miss the deadline entirely.

The Tax Calculation and the Cliff

New York's graduated estate tax rates run from 3.06% on the lowest bracket to 16% on estates above approximately $10.1 million.

What makes the calculation different from the federal system is the cliff. New York calculates tax as if there is no exemption — taxing the estate from dollar one — and then applies a credit to zero out the liability for estates below the threshold. That credit phases out as the estate grows and disappears entirely when the estate exceeds 105% of the basic exclusion amount.

For 2026, the cliff triggers at $7,717,500 (105% of $7,350,000). Once crossed, the full estate is taxed from dollar one with no credit. An estate worth $7.8 million pays tax on all $7.8 million — not just the $450,000 above the threshold. The resulting tax bill often exceeds $700,000.

The cliff phase-out zone — between $7,350,000 and $7,717,500 — produces effective marginal tax rates that can exceed 250% on those specific dollars. Estates in this range benefit enormously from proper deduction planning.

Deductions That Reduce the Taxable Estate

The ET-706 allows several deductions against the gross estate:

Marital deduction. Assets transferred outright to a surviving U.S. citizen spouse are fully deductible, eliminating estate tax on the first death. However, because New York does not allow portability, this approach permanently wastes the deceased spouse's New York exemption unless the estate plan routes assets through a credit shelter trust.

Charitable deduction. Assets bequeathed to qualifying charitable organizations are deductible. This is also the mechanism behind the "Santa Clause" provision — a formulaic bequest drafted into wills that automatically directs the exact amount over the exemption threshold to charity, dropping the taxable estate back to exactly $7,350,000 and eliminating the cliff tax entirely.

Funeral and administration expenses. Reasonable funeral costs, executor commissions, attorney fees, and court filing fees are deductible. Note: funeral expenses cannot be deducted on the personal income tax return or the fiduciary income tax return — only on the ET-706.

Debts and liabilities. Mortgages, credit cards, medical bills, and other debts the decedent owed at death reduce the gross estate.

The Estate Tax Lien and Form ET-117

At the exact moment of death, New York law places an automatic estate tax lien on all real property and cooperative apartments the decedent owned in New York State. This lien prevents any sale or title transfer until formally released by the Tax Department.

To obtain a release, the executor files Form ET-117 (Release of Lien of Estate Tax) paired with one of three supporting documents:

• Form ET-30 (Application for Release of Estate Tax Lien): Used when the fiduciary is already appointed (has Letters Testamentary or Administration) and the estate needs to sell within nine months of death.
• Form ET-85 (New York State Estate Tax Certification): Used when no estate tax return is required (estate is under threshold), or when more than nine months have passed, or before a fiduciary is formally appointed by the court. Must be notarized.
• Form ET-706: Filed alongside ET-117 when the estate is taxable and the return is being submitted simultaneously.

Separate ET-117 forms are required for each county where the decedent held real property. Real property and cooperative apartments must also be reported on separate ET-117 forms — they cannot be combined even if located in the same county.

Processing time for lien releases is typically three to five weeks. Executors expecting a real estate sale should initiate this process as early as possible in the administration.

Estate Tax Power of Attorney: Form ET-14

A standard New York statutory Power of Attorney is not valid for New York estate tax matters. If the executor is working with an attorney or CPA to prepare and file the ET-706, that professional must be authorized through Form ET-14 (Estate Tax Power of Attorney) — a specific instrument issued by the Department of Taxation and Finance.

Without a properly executed ET-14, the Tax Department will not communicate with the executor's representative or allow them to access estate tax records.

Federal Form 706: When It's Also Required

If the gross estate exceeds the federal estate tax threshold of $15,000,000, the executor must also file federal Form 706 with the IRS, due nine months from the date of death with the same extension provisions.

Even when no federal estate tax is owed, executors sometimes file Form 706 voluntarily to elect portability — to transfer the deceased spouse's unused federal exemption to the surviving spouse. New York does not recognize this federal portability election for state purposes, but the election still has value for the federal estate tax calculation when the surviving spouse eventually dies.

For large estates with New York real property, a separate federal estate tax lien also attaches under IRC § 6324. Clearing this federal lien requires filing IRS Form 4422 and is known to take considerably longer than the state process — sometimes requiring the executor to hold sale proceeds in escrow pending IRS clearance.

The Closing Letter

After the ET-706 is filed, reviewed, and any tax paid, the Tax Department issues an estate tax closing letter confirming the obligation is satisfied. This letter is typically required before the executor makes final distributions to beneficiaries and closes the estate.

The closing letter takes approximately nine months from the filing date to issue. That means an estate where the ET-706 is filed at the nine-month deadline won't receive the closing letter until roughly 18 months after the date of death. The total estate administration timeline in New York — from death to final distribution — frequently runs 18 to 24 months when real estate is involved.

The New York Final Tax & Estate Tax Guide covers the ET-706 filing sequence, the ET-117 lien release workflow, the interaction with federal Form 706, and the complete chronological administration timeline from death through distribution.

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