Form 8971 Filing Requirements, Deadlines, and Penalties

The filing requirements for Form 8971 apply to any executor of an estate that must file a federal estate tax return (Form 706). The form, along with a separate Schedule A for each beneficiary, reports the estate tax value of inherited property to the IRS and to the people receiving it, so that the basis a beneficiary later uses to calculate capital gains cannot exceed the value the estate reported. For decedents dying in 2026, the Form 706 threshold — and therefore the Form 8971 trigger — is a gross estate plus adjusted taxable gifts exceeding $15,000,000.¹

Which Estates Have to File

The obligation is tied to Form 706, not to whether the estate owes any tax. An estate that files Form 706 and then wipes out its liability with the marital or charitable deduction still has to file Form 8971. What matters is whether the return was required.

Three types of Form 706 filings do not trigger Form 8971:²

Portability-only returns filed solely to transfer a deceased spouse’s unused exclusion to the surviving spouse.
Returns filed solely to make generation-skipping transfer tax allocations or elections.
Protective returns filed only to avoid a penalty or to satisfy a state law requirement.

The authority for the reporting requirement is IRC Section 6035, which directs executors of estates required to file Form 706 to send basis information to the IRS and to each person acquiring property from the decedent.³

What Goes on Schedule A

Each beneficiary gets their own Schedule A listing the specific assets they received, the valuation date, and the exact value reported on Form 706. That value becomes the ceiling on the beneficiary’s income tax basis under IRC Section 1014(f).⁴

The basis consistency rule only covers property whose inclusion in the estate actually increased the estate tax. Beyond that structural limit, the IRS excepts several categories from Schedule A reporting:²

Cash and cash equivalents in U.S. dollars, including demand deposits, CDs, and money market fund shares.
Lump-sum life insurance proceeds on the decedent’s life, paid in U.S. dollars.
Retirement accounts, including traditional and Roth IRAs, deferred compensation distributions, and Section 72 annuities.
Income in respect of a decedent under IRC Section 691, such as unpaid wages or accrued interest.
Household and personal effects that do not require an appraisal under the estate tax regulations.
Property sold in a taxable transaction by the estate before distribution.
Notes the decedent forgave in full at death.

Property fully covered by the marital or charitable deduction generally falls out of the reporting rule for the same reason: it didn’t add to the estate tax. Partial-deduction situations are different. Charitable remainder trusts, partial QTIP elections, and property split between a spouse and a charity where the deductions don’t absorb the full value all stay in scope.

One quirk to watch: even if every asset in the estate qualifies as excepted property, the executor still has to file Form 8971 itself. The exceptions apply only to what goes on Schedule A.²

The 30-Day Deadline

Form 8971 goes to the IRS, and each Schedule A goes to the corresponding beneficiary, by the earlier of:²

30 days after Form 706 was required to be filed, including extensions, or
30 days after Form 706 was actually filed.

Filing the 706 early accelerates the 8971 clock. An executor who submits the estate tax return six months before the extended deadline has 30 days from that actual filing date, not from the later statutory deadline. Extensions on Form 706 do push the 8971 deadline out, but only until the 706 is actually filed.³

Form 8971 is mailed to the IRS separately. It is never attached to Form 706.

Getting Schedule A to Each Beneficiary

Each beneficiary receives only their own Schedule A, never the full Form 8971 and never another beneficiary’s schedule. Acceptable delivery methods include in-person delivery, U.S. mail to the last known address, an approved private delivery service, or email.²

The executor certifies the delivery date for each beneficiary on Part II of Form 8971, so keep proof: certified mail receipts, delivery confirmation, acknowledgments of receipt, or the equivalent. If a beneficiary’s address is unknown, the instructions allow mailing to the last known address; document the effort to locate them and keep it with the estate records.

When property passes into a trust, the trustee receives Schedule A on behalf of the trust beneficiaries. One trustee is enough when there are several. The same one-recipient approach applies when another estate is the beneficiary. Collecting names, addresses, and taxpayer identification numbers, especially trust EINs, is often the slowest part of the job; start early.

When You Have to File a Supplemental Form

Form 8971 can require a follow-up. Two events trigger a supplemental filing:²

A beneficiary receives non-excepted property that was not on the original Schedule A.
Previously reported information becomes incorrect or incomplete, including changes from an IRS audit or an amended Form 706.

Deadlines depend on the trigger. If a beneficiary acquires property after the original filing deadline has passed, the supplemental Form 8971 and Schedule A are due by January 31 of the year after the acquisition. Value changes from an audit or amended return generally require a supplemental filing within 30 days of the adjustment.³ Check the Supplemental Filing box on both the form and each affected Schedule A, and report only what changed.

Penalties on the Executor

Failure to file Form 8971 with the IRS falls under IRC Section 6721; failure to furnish correct Schedules A to beneficiaries falls under Section 6722. Each late or missing document generates its own penalty. For returns due in 2026, the amounts step up with the delay:⁵

Up to 30 days late: $60 per return or statement.
31 days late through August 1: $130 per return or statement.
After August 1 or never filed: $340 per return or statement.
Intentional disregard: $680 per return or statement, with no annual cap.

Annual maximums also apply and depend on the filer’s size. For filers with average annual gross receipts over $5 million in the prior three tax years, the cap for returns filed after August 1 is $4,098,500. Smaller filers face a $1,366,000 cap.⁶ The IRS adjusts these figures each year for inflation. Penalties can be waived where the failure was due to reasonable cause and not willful neglect. Fixing an error within 30 days keeps the penalty at roughly one-fifth of what applies after August 1.

What This Costs the Beneficiary

The reporting rule reaches into the beneficiary’s later tax returns. If a beneficiary claims a basis higher than the value reported on their Schedule A, IRC Section 6662(k) treats the resulting underpayment as an “inconsistent estate basis,” and the standard 20% accuracy-related penalty under Section 6662(a) applies on top of the tax owed.⁷⁸

Beneficiaries should hold onto Schedule A permanently. The value shown there is the basis they will use whenever they sell the inherited property, which may not happen for decades.

1
Internal Revenue Service. What’s New — Estate and Gift Tax
2
Internal Revenue Service. Instructions for Form 8971 and Schedule A
3
Office of the Law Revision Counsel. 26 U.S. Code 6035 – Basis Information to Persons Acquiring Property from Decedent
4
Office of the Law Revision Counsel. 26 U.S. Code 1014 – Basis of Property Acquired from a Decedent
5
Internal Revenue Service. Information Return Penalties
6
Internal Revenue Service. Internal Revenue Manual 20.1.7 – Information Return Penalties
7
Office of the Law Revision Counsel. 26 USC 6662 – Imposition of Accuracy-Related Penalty on Underpayments
8
eCFR. 26 CFR 1.6662-9 – Inconsistent Estate Basis Reporting