How do the gift tax and estate tax work together?

Gift tax and estate tax operate as a single unified system: they share one combined lifetime exclusion, and every taxable gift you make during life reduces the exclusion left to shelter your estate at death.

Both taxes use the same rate schedule, currently a top federal rate of 40% on transfers above the exclusion amount. The IRS applies a unified rate schedule to your cumulative taxable gifts and your taxable estate together, then offsets the resulting tax with a credit tied to your lifetime exclusion. As you use that credit against gift tax during life, whatever remains is what's available to apply against estate tax at death. This is why lifetime giving strategy and estate planning can't be considered separately: a large taxable gift today directly reduces the exemption your estate can use later.

Two exclusions matter here:

• Annual gift tax exclusion: gifts up to this amount, per recipient, per year, don't count against your lifetime exclusion at all and require no Form 709 reporting in most cases.
• Lifetime unified exclusion: a single, much larger amount shared between taxable gifts made during life and the value of your estate at death. Using part of it on lifetime gifts leaves less to shelter your estate later.

Because the exclusion is unified, the value assigned to a gift matters as much as the value assigned to an estate. An understated gift value can trigger IRS scrutiny years later when the estate tax return is filed and the numbers are reconciled. A gift tax appraisal establishes a defensible, USPAP-compliant value at the time of the gift, which supports both the Form 709 filing and the eventual estate tax accounting. For current exclusion amounts, see our answer on the estate and gift tax exemption for 2026, and for valuation specifics, see how gifts are valued for tax purposes.