Portability allows a surviving spouse to apply a deceased spouse’s unused federal gift and estate tax exemption amount toward his or her own transfers during life or at death. For 2020, the exemption amount is $11.58 million, and the IRS just announced that that amount will increase to $11.7 million for 2021.
To secure these benefits, however, the deceased spouse’s executor must have made a portability election on a timely filed estate tax return.