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The eight knowledge domains

After death: the elections that still change the outcome

Compiled by the Sitonce editorial team from CFP Board sources listed belowUpdated 3 min readFacts verified 1 September 2026
The short answer

Several decisions remain after death: a qualified disclaimer within nine months, the alternate valuation date, electing portability, and choosing the estate's tax year. Each has a deadline and each can materially change the outcome.

Estate planning does not entirely stop at death, which is a useful thing to know and a set of deadlines to respect.

Qualified disclaimers

A beneficiary can refuse an inheritance, and the property then passes as though they had predeceased.

To be a qualified disclaimer it must be in writing, irrevocable, made within nine months of death - or of the beneficiary reaching 21 - before accepting any benefit, and the disclaimant must not direct where the property goes.

That last requirement is the constraint. A disclaimer is not a redirection; it is a refusal, and the property goes wherever the document says it goes next.

Why a surviving spouse might disclaim

To move assets into a credit shelter trust and use the first spouse's exclusion, where the plan did not provide for it directly. It is the classic postmortem correction, and it must happen within nine months.

The alternate valuation date

Six months after death, available only where the election reduces both the gross estate and the estate tax.

It is a fall-in-value provision. Property distributed or sold before the six-month mark is valued at that earlier date, and the election applies to the whole estate rather than to selected assets.

It also lowers the basis heirs receive, which is a genuine trade-off where the estate would owe no tax anyway.

The portability election

Filing a federal estate tax return to transfer the deceased spouse's unused exclusion to the survivor, even where no return would otherwise be required and no tax is due.

It is the single most valuable thing an executor can do for a surviving spouse in a moderately sized estate, and it is the one most often missed because nobody realizes a return should be filed at all.

Choosing the estate's tax year

An estate may adopt a fiscal year ending up to twelve months after death rather than a calendar year.

That allows income and deductions to be timed across two of the beneficiaries' tax years, which can materially reduce the total tax on income arising during administration.

Other elections

  • Deducting administration expenses on the estate tax return or the income tax return, but not both.
  • Special use valuation for qualifying farm or business real property, valuing it at its actual use rather than its highest and best use.
  • The instalment payment election for a closely held business interest.
  • Section 303 redemption to fund estate costs without dividend treatment.
  • The income in respect of a decedent deduction, where estate tax was paid on income the heir will also be taxed on.

The last is worth knowing. An heir receiving a traditional IRA that was subject to estate tax may deduct the estate tax attributable to it as they take distributions, avoiding a genuine double tax.

Figures are for the 2026 tax year

The transfer tax exclusion was changed by the 2025 reconciliation act and is indexed thereafter. Confirm the current figure before relying on it, and check state law separately.

Common questions

What is a qualified disclaimer?

A written, irrevocable refusal of an inheritance made within nine months of death, before accepting any benefit, without directing where the property goes. It then passes as though the disclaimant had predeceased.

Why would a surviving spouse disclaim?

To move assets into a credit shelter trust and use the first spouse's exclusion where the plan did not provide for it directly. It is the classic postmortem correction.

When can the alternate valuation date be used?

Six months after death, and only where the election reduces both the gross estate and the estate tax. It applies to the whole estate and lowers the basis heirs receive.

What is the most commonly missed postmortem step?

Filing a federal estate tax return to elect portability, even where no return would otherwise be required. Missing it loses the deceased spouse's unused exclusion permanently.

What is the income in respect of a decedent deduction?

A deduction for estate tax attributable to income the heir will also pay income tax on - such as a traditional IRA - taken as distributions are received, avoiding a double tax.