Because gifts to charities are tax deductible, your gift will not be subject to estate taxes. (quotacy.com)
It goes to your life insurance beneficiaries income tax free, but may be subject to estate tax if your estate is above the current federal estate exemption limit. (insuranceandestates.com)
And since the exclusion is quite large, very few estates are subject to estate tax anyway. (money.stackexchange.com)