Federal estate tax law includes a provision called portability. This provision only applies to married couples. It allows the surviving spouse to use any part of their deceased spouse’s unused estate and gift tax exemption. Including portability in an estate plan protects the surviving spouse from significant estate tax bills if the deceased spouse’s estate didn’t exceed exemption thresholds. With the deceased spouse’s unused exclusion (DSUE), the surviving spouse can transfer their spouse’s unused federal gift or estate tax exemption upon death.
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