Estate Freeze Techniques: GRATs, IDGTs, and FLPs Compared

An estate freeze locks in the current transfer-tax value of high-growth assets, allowing all future appreciation and cash-flow growth to transfer to trusts for future generations without triggering gift or estate tax liabilities.

Three core structures are routinely deployed around operating businesses, real estate portfolios, and private equity assets:

Grantor Retained Annuity Trusts (GRATs): The grantor transfers appreciating assets into an irrevocable trust while retaining the right to an annuity payment for a defined term of years. If the asset appreciates faster than the statutory IRC Section 7520 hurdle rate, the excess value transfers to remainder beneficiaries tax-free. GRATs can be structured with near-zero initial gift tax liability, making them ideal for highly volatile assets or pre-liquidity equity.

Installment Sales to Intentionally Defective Grantor Trusts (IDGTs): The grantor sells real assets or equity to a completed grantor trust in exchange for a promissory note bearing interest at the Applicable Federal Rate (AFR). Because the trust is a grantor trust for income tax purposes, the sale and note interest are non-taxable events. The asset's yield and appreciation above the low AFR interest rate compound inside the trust free of estate tax.

Family Limited Partnerships (FLPs) and LLCs: By placing underlying real estate or private holdings into an entity and transferring non-voting minority interests to family trusts, taxpayers can legitimately apply valuation discounts for lack of marketability and lack of control, discounting the asset value for transfer-tax calculations.

The choice of vehicle depends on whether the underlying asset is income-generating, volatile, or illiquid, and how the current interest-rate environment compares against historical hurdle rates.