What Is the Lifetime Exemption?
The lifetime gift tax exemption (formally the "applicable exclusion amount") is the total amount you can give away during your lifetime — above the annual exclusion — before owing any gift tax. For 2026, this amount is $15,000,000 per person.
Unified with Estate Tax
The lifetime exemption is "unified" with the estate tax exemption, meaning the same $15,000,000 covers both gifts during life and transfers at death. Every dollar of lifetime exemption you use for gifts reduces the amount available for your estate. This is why it's called the "unified credit."
TCJA and the Current High Exemption
The Tax Cuts and Jobs Act of 2017 roughly doubled the lifetime exemption. These provisions are scheduled to sunset, which could reduce the exemption significantly. The IRS has confirmed an anti-clawback rule: gifts made under the higher exemption will not be retroactively taxed even if the exemption drops.
How Taxable Gifts Reduce Your Exemption
When you make a taxable gift (a gift exceeding the annual exclusion), it doesn't immediately trigger tax. Instead, it reduces your remaining lifetime exemption. You report the gift on Form 709, and the IRS tracks your cumulative taxable gifts. Tax is only owed when cumulative taxable gifts exceed the lifetime exemption.
Planning Considerations
Given the potential sunset of the TCJA provisions, many estate planning professionals recommend making large gifts now to lock in the higher exemption. This strategy works because of the anti-clawback rule — even if the exemption drops, gifts made under the higher exemption are protected.