Estate Tax Portability

Form 706 Portability Election & DSUE

A Form 706 portability election can transfer a deceased spouse’s unused exclusion amount (DSUE) to a surviving spouse. A return may be filed for portability even when the estate is below the normal filing threshold.

Updated September 6, 2026 • Verify current agency instructions before filing.

A Form 706 portability election can transfer a deceased spouse’s unused exclusion amount (DSUE) to a surviving spouse. A return may be filed for portability even when the estate is below the normal filing threshold.

Why portability changes the filing decision

The executor may need to consider a Form 706 portability filing even when no estate tax is due. The return generally must be timely filed, subject to special relief procedures that may apply in some circumstances.

Preparation considerations

  • Confirm the surviving spouse and prior-spouse facts.
  • Determine whether the estate otherwise has a filing requirement.
  • Gather asset information and valuation support.
  • Complete the portability/DSUE section and required schedules.
  • Review current IRS relief procedures if the ordinary deadline was missed.

Related estate tax resources

Frequently Asked Questions

What is the Form 706 filing deadline?

Form 706 is generally due nine months after the decedent’s date of death, subject to weekend/holiday rules and valid extensions.

What is the 2026 estate tax filing threshold?

For 2026 decedents, the IRS lists a $15,000,000 basic exclusion and filing threshold under the general filing test.

Can an estate file Form 706 below the threshold?

Yes. A common reason is to elect portability of a deceased spouse’s unused exclusion amount (DSUE).