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IRS Form 706 (2025) — Estate Tax Return Filing Guide
File, correct, or amend your 2025 estate tax return with the official IRS form. Download the form, follow step-by-step instructions, and resolve penalties or missing records for estates subject to federal estate tax.
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What Is This Form
Form 706 is the United States Estate (and Generation-Skipping Transfer) Tax Return used to report federal estate taxes after a decedent's death. An executor must file when the gross estate plus adjusted taxable gifts exceeds the applicable filing threshold. The 2025 form applies based on the decedent's date of death.
Late Executors
Executors filing after the nine-month deadline should submit Form 706 promptly to reduce additional penalties and create an official federal estate tax compliance record.
Multiple or Complex Decedent Assets
Estates containing real estate, securities, retirement accounts, or business interests must report each asset at fair market value on the decedent’s date of death.
Itemizing Deductions
Executors claiming deductions for debts, mortgages, funeral costs, or charitable transfers must itemize those amounts on the correct Form 706 schedules.
Portability Election
Form 706 allows executors to elect portability and preserve the deceased spouse’s unused exemption for the surviving spouse’s future estate planning needs.
IRS Compliance
Filing Form 706 establishes formal IRS compliance and is generally required before the Internal Revenue Service issues an estate tax closing letter.
Nonresident Aliens / Generation-Skipping Transfers
Nonresident aliens with U.S.-situs assets above $60,000 may need Form 706-NA, while generation-skipping transfers must appear on applicable Form 706 schedules.
Eligibility
Form 706 applies when a decedent’s gross estate and adjusted taxable gifts exceed the 2025 filing threshold of $13.99 million. Executors also file this return for portability elections, late filings, and establishing an official federal estate tax compliance record.
Late Executors
Executors who missed the nine-month filing deadline should file Form 706 promptly to stop additional failure-to-file penalties and preserve allowable estate tax deductions.
Multiple or Complex Decedent Assets
Estates exceeding $13.99 million, including real estate, securities, retirement accounts, and adjusted taxable gifts, must file Form 706 to calculate potential estate tax liability.
Itemizing Deductions
Executors reporting deductible debts, mortgages, administration expenses, funeral costs, or charitable bequests must attach the appropriate schedules to properly reduce the taxable estate.
Portability Election
An executor must file Form 706 to elect portability and preserve the deceased spouse’s unused exemption, even if no federal estate tax is due.
IRS Compliance
Some estates file Form 706 to obtain an estate tax closing letter that probate courts, banks, and financial institutions may require before distributing assets.
Nonresident Aliens / Generation-Skipping Transfers
Nonresident aliens with U.S.-situs assets above $60,000 must file Form 706-NA, while generation-skipping transfers require reporting on applicable Form 706 schedules.
Step-by-Step
Follow the steps below to complete Form 706 accurately. Several rules, including portability elections and exclusion amounts, apply specifically to the 2025 tax year.
Step 1: Gather Your Documents Before Starting
Collect the decedent’s Social Security number, prior Form 709 returns, bank records, insurance policies, appraisals, and documents supporting debts or liabilities. Missing records commonly trigger IRS notices, amended returns, and estate administration delays after the filing deadline passes.
Step 2: Determine the Gross Estate and Confirm the Filing Threshold [2025 Only]
List all assets owned at death, including real estate, securities, retirement accounts, insurance proceeds, business interests, and cash holdings, then determine each asset’s fair market value on the decedent’s date of death. Form 706 generally applies when the gross estate plus adjusted taxable gifts exceeds the 2025 exclusion amount of $13.99 million.
Step 3: Report All of the Estate’s Assets on the Correct Schedules
Report property on the correct schedules, including Schedule A for real estate, Schedule B for securities, Schedule C for mortgages and cash, Schedule D for insurance, Schedule E for jointly owned property, and Schedule F for miscellaneous property. Report adjusted taxable gifts made after 1976 on Part 2, Line 4 of Form 706.
Step 4: Calculate the Taxable Estate and Apply Deductions
Subtract allowable deductions from the gross estate to determine the taxable estate. Deductible items include funeral costs, administration expenses, mortgages, debts, losses during administration, and charitable bequests. The marital deduction may also reduce taxable estate value for qualifying property transferred to a surviving spouse.
Step 5: Choose Your Deductions and Apply Exemptions [2025 Only]
Subtract allowable deductions from the gross estate to calculate the taxable estate accurately. Deductible items include funeral expenses, administration costs, debts, mortgages, losses during administration, and charitable bequests reported on the applicable schedules. The unlimited marital deduction may apply when qualifying property passes to a surviving spouse who is a United States citizen.
Step 6: Claim the Applicable Credit [2025 Only]
Apply the applicable unified credit for 2025 after calculating the tentative estate tax liability. The maximum credit equals $5,389,800, reflecting the $13.99 million exclusion amount. Executors claim the credit directly on Form 706 to reduce the estate tax owed.
Filing Deadline — Nine Months After the Decedent’s Date of Death
Form 706 is generally due nine months after the decedent’s date of death. If the deadline falls on a weekend or legal holiday, IRC §7503 moves it to the next business day. Executors may request a six-month extension by filing Form 4768 before the original deadline, although interest on unpaid estate tax still accrues immediately.
Refund or Overpayment Deadline — Time-Sensitive
Estates seeking a refund or credit for overpaid estate tax must follow the limitation periods under IRC §6511 and related estate tax provisions. Generally, refund claims must be filed within three years after filing the return or two years after payment. Executors uncertain about applicable deadlines should consult a qualified tax professional before the claim period expires.
Processing Time — Allow Six to Nine Months
The IRS generally requires six to nine months to review a properly completed Form 706 estate tax return. Executors should avoid distributing estate assets before receiving the estate tax closing letter because the IRS may request additional records or adjustments. Estates with unpaid balances should submit payment promptly because interest accrues daily under IRC §6621.
Amended Returns and Late Portability Corrections — Follow IRS Procedures
Executors discovering errors after filing must submit an amended Form 706 with corrected schedules and a written explanation describing the changes. Revenue Procedure 2022-32 may allow certain estates up to five years to make a late portability election when no filing requirement originally existed. Executors should review current IRS guidance before relying on this procedure.
Missing W-2s or Tax Records for 2025?
Executors who file late or amend a prior estate tax return might lack complete records for all estate assets. IRS transcripts, financial institutions, and third-party records can help reconstruct missing information and support accurate federal estate tax reporting.
IRS Estate Tax Transcripts
Request IRS estate tax transcripts to verify previously filed returns, processed payments, and existing account activity before submitting an amended or corrected Form 706 estate tax return.
IRS Wage and Income Transcripts for the Decedent
IRS wage and income transcripts may help verify retirement distributions, prior income records, reportable gifts, and financial information needed to complete estate administration schedules accurately.
Financial Institutions and Brokerage Firms
Contact banks, brokerage firms, and retirement account custodians directly to obtain account statements, beneficiary records, and fair market value documentation dated to the decedent’s death.
Qualified Appraisers for Property Valuation
Real estate, business interests, and valuable personal property generally require qualified appraisals to establish fair market value as of the decedent’s date of death for estate tax reporting.
Do not estimate asset values or financial records — use IRS transcripts, third-party statements, and qualified appraisals to reduce IRS follow-up notices.
Missing W-2s or Tax Records?
You can still complete your return even without original records
Penalties and interest begin accruing after the original estate tax filing deadline passes. Filing Form 706 now, even late, stops additional failure-to-file penalties from increasing and may reduce the estate’s overall federal tax exposure.
Failure-to-File Penalty
(5% per month, up to 25%)
The IRS generally charges a failure-to-file penalty equal to 5% of the unpaid estate tax for each late month, up to 25%. When both penalties apply, the IRS partially reduces the failure-to-file amount, though prompt filing still limits additional liability.
Failure-to-Pay Penalty
(0.5% per month + interest)
A failure-to-pay penalty of 0.5% per month applies to unpaid estate tax balances after the original deadline. Interest accrues daily under IRC §6621. Making partial payments before filing Form 706 may reduce penalties and interest for the estate.
Penalty Abatement Options
(First-Time Abatement & Reasonable Cause)
Estate tax penalties generally qualify for reasonable cause relief instead of an IRS first-time abatement. Executors may request relief when serious illness, natural disasters, missing records, or other circumstances beyond their control prevent the timely fulfillment of filing or payment obligations.
Filing late is always better than not filing at all. The reason is that the failure-to-file penalty grows much faster than the failure-to-pay penalty each month.
These are the most common errors that cause IRS delays, rejected returns, or missed deductions on Form 706.
- Using the wrong form revision — The current Form 706 is the August 2025 revision; using an outdated version may cause IRS processing delays and possible rejection.
- Omitting adjusted taxable gifts—Post-1976 taxable gifts must be reported on Part 2, Line 4 as adjusted taxable gifts; omitting them understates the taxable estate and triggers IRS notices.
- Errors in the portability election — The DSUE computation and portability election are completed in Part 6, Sections A–D; errors or omissions in this section can invalidate the entire portability claim.
- Incorrect fair market value reporting — Using purchase price, book value, or estimated figures instead of qualified appraisals for real estate or closely held business interests is a frequently audited issue.
- Misclassifying Schedule G transfers—Schedule G covers only specific lifetime transfers under IRC §§ 2035–2038; misclassifying or omitting qualifying transfers from this schedule invites IRS scrutiny.
- Assuming no return is required—Executors sometimes skip filing without accounting for adjusted taxable gifts or jointly held assets that may push the estate past the $13.99 million threshold.
- Missing or incorrect Social Security numbers — The return must correctly include the decedent's SSN and, where applicable, the surviving spouse's SSN; errors cause processing delays and slow estate administration.
- Unsigned return —The executor must sign Form 706; an unsigned return is not properly filed, and failure-to-file penalties will continue to accrue.
- Failing to properly request the estate tax closing letter—Requests must be submitted via Pay.gov with a $56 fee; the IRS will not process incomplete or informal submissions.
What is IRS Form 706 (2025) used for?
Form 706 reports the fair market value of a decedent’s gross estate, calculates federal estate tax liability, and claims allowable deductions under the Internal Revenue Code. The 2025 return generally applies when the estate and adjusted taxable gifts exceed the $13.99 million filing threshold or when executors elect portability.
Can I still file a 2025 estate tax return after the deadline?
Yes, executors may still file Form 706 after the nine-month deadline, although penalties and interest apply to unpaid estate tax balances. Filing promptly stops additional failure-to-file penalties from increasing. Executors requesting penalty relief should maintain records supporting a reasonable cause abatement request submitted to the Internal Revenue Service.
What is the 2025 federal estate tax exemption and unified credit?
The 2025 basic exclusion amount equals $13.99 million per individual, while the applicable unified credit totals $5,389,800. Estates below this threshold generally do not need to file unless portability is elected. The 2026 exclusion amount is scheduled to increase to $15 million under current federal law.
What documents are needed to complete Form 706?
Executors generally need the decedent’s Social Security number, prior Form 709 returns, bank statements, brokerage records, insurance policies, real estate records, and documentation supporting debts or liabilities. Qualified appraisals are also required for real estate, business interests, and other property reported at fair market value on the date of death.
How does the portability election work, and who files it?
The estate’s executor files Form 706 to elect portability and transfer the deceased spouse’s unused exemption to the surviving spouse. Executors complete the election in Part 6, Sections A through D of Form 706. Certain estates may qualify for late portability relief under Revenue Procedure 2022-32.
How long does the IRS take to process Form 706?
For returns without major issues, the IRS generally takes six to nine months to process Form 706 after submission. The Internal Revenue Service later issues a closing letter for estate tax, confirming review of federal estate tax obligations. Executors should avoid distributing estate assets until processing is complete.
What is the estate tax closing letter, and how do I request it?
The estate tax closing letter verifies that the IRS reviewed and resolved the estate’s federal tax obligations. Executors request the letter through Pay.gov by submitting the decedent’s identifying information and the required IRS user fee. Probate courts and financial institutions commonly require this document before releasing estate assets.
What should I do if I discover an error after filing Form 706?
Executors discovering errors after filing should submit an amended Form 706 with corrected schedules and a written explanation describing the changes. Common corrections include updated appraisals, newly identified estate assets, revised deduction amounts, or portability election adjustments. Filing promptly may reduce additional interest and IRS follow-up notices.
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