Charitable Lead Trusts Revisited

Who is an ideal candidate for a Charitable Lead Trust (CLT)? First and foremost, the person must be charitably-inclined. Another obvious factor is that the person has wealth. I mean wealthy from the standpoint that the person does not need the income from the property to be placed in the trust. What is an ideal asset for a CLT? An asset that will significantly appreciate in value. An asset that is liquid and/or produces enough income to cover the charitable annuity.