> Second, gifts in excess of the annual exclusion may still be tax-free up to the lifetime estate basic exclusion amount ($11.58 million for 2020).[9] For estates over that amount, however, such gifts might result in an increase in estate taxes. Taxpayers that expect to have a taxable estate may sometimes prefer to pay gift taxes as they occur, rather than saving them up as part of the estate.
https://en.wikipedia.org/wiki/Gift_tax_in_the_United_States
> Second, gifts in excess of the annual exclusion may still be tax-free up to the lifetime estate basic exclusion amount ($11.58 million for 2020).[9] For estates over that amount, however, such gifts might result in an increase in estate taxes. Taxpayers that expect to have a taxable estate may sometimes prefer to pay gift taxes as they occur, rather than saving them up as part of the estate.