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GRATs: the estate-freeze trick for assets about to take off

How the wealthy pass future growth to heirs nearly gift-tax-free — the mechanics of a grantor retained annuity trust, the interest-rate hurdle, and why they roll them in short waves.

A grantor retained annuity trust (GRAT) is a way to transfer the future appreciation of an asset to your heirs while using little or none of your lifetime gift-tax exemption. You put an asset into a trust, the trust pays you back a fixed annuity over a few years, and anything the asset earns ABOVE a government-set hurdle rate passes to your beneficiaries essentially tax-free. It is one of the cleanest 'estate freeze' techniques — and it shines exactly when an asset is poised to grow fast.

The mechanics in four steps

1
Fund the trust
You transfer an asset — concentrated stock, pre-IPO shares, a stake in a growing business — into an irrevocable GRAT for a set term (often 2–5 years).
2
Take annuity payments back
The trust pays you an annuity each year designed to return the original value plus the IRS hurdle rate (the section 7520 rate). Structured this way, the taxable gift at the start is near zero — a 'zeroed-out' GRAT.
3
Let the asset outperform
If the asset grows faster than the hurdle rate, the excess growth stays in the trust after your annuity is fully paid back.
4
Pass the remainder to heirs
At the end of the term, whatever is left over the hurdle passes to your beneficiaries (or a trust for them) free of additional gift or estate tax.

A $2 million GRAT that beats the hurdle

You fund a 2-year zeroed-out GRAT with $2,000,000 of stock when the 7520 hurdle rate is 5%. The stock returns 30% over the term. After the trust pays your annuity back (roughly $2M plus 5% growth), about $500,000 of excess appreciation remains and passes to your heirs — using essentially none of your lifetime exemption. Had the stock merely matched the hurdle, nothing would pass, but you would be no worse off than before.

Why the hurdle rate is everything

The GRAT only 'wins' to the extent the asset outperforms the section 7520 rate, which the IRS resets monthly. When that rate is low, the hurdle is easy to clear and GRATs are especially attractive; when it is high, the asset has to work harder. Because the rate moves, sophisticated families check the current 7520 rate before funding rather than relying on a figure from last year.

Why they roll short GRATs

Short terms (often 2 years) reduce 'mortality risk' — the fatal flaw of a GRAT: if you die during the term, the assets are pulled back into your estate and the benefit evaporates.
Rolling a series of short GRATs — sometimes called a GRAT 'ladder' or 'rolling GRATs' — lets each one capture good years independently, so a great year is not diluted by a bad one.
Each annuity payment received can be used to fund the next GRAT, keeping the machine running.

GRATs are not for everyone or every asset

GRATs require legal drafting, annual appraisals for hard-to-value assets, and careful administration. They work best for volatile or fast-appreciating assets and for people already near or above the estate-tax exemption. They do a poor job with assets that pay little and grow slowly. This is an attorney-and-CPA structure, not a DIY move, and none of this is individualized advice.

GRAT vs. a plain gift, at a glance

Feature	Outright gift	Zeroed-out GRAT
Uses lifetime exemption	Yes — full value	Little to none
If asset booms	Growth is already out of estate	Excess over hurdle passes tax-free
If you die early	Gift stands	Assets pulled back into estate
If asset flops	Exemption spent on a dud	No harm — you got annuity back
Complexity	Low	High — legal + appraisal

Two ways to move future growth to heirs

The bottom line

A GRAT is a low-downside bet on outperformance: you keep your capital (via the annuity), spend almost no exemption, and hand heirs whatever the asset earns above the IRS hurdle. It is tailor-made for concentrated or pre-liquidity-event stock and thrives when hurdle rates are low. The two real risks are dying mid-term and drafting it wrong — both reasons this belongs with an experienced estate attorney rather than a template.

Check your understanding

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