Waiting is the most expensive estate planning strategy most wealthy Americans are currently using.

Not waiting on purpose. Waiting because the deadline feels distant, the paperwork feels manageable, and the attorney always seems available next quarter. That logic is about to cost a lot of people a lot of money.

Have you actually run the numbers on your estate exposure if the exemption halves?

If not, read this carefully.

The Window That Closed Faster Than Anyone Expected

A client I’ll call David, a 58-year-old manufacturer in Ohio with $22 million in assets, called me in January 2024 convinced he had two years to decide. He didn’t. By the time his attorney had the paperwork ready, his window to fully fund a Spousal Lifetime Access Trust had narrowed to a fraction of what he’d planned. One scheduling delay, one revision cycle, one slow title transfer on a commercial property — and David moved $4 million less than he intended into the trust before his attorney’s capacity maxed out. That $4 million now sits fully exposed to a potential 40% federal estate tax hit if the 2017 Tax Cuts and Jobs Act exemptions sunset as scheduled at the end of 2025.

(Note: David is a fictionalized composite based on common client scenarios in the estate planning space. Dollar figures and asset structure are illustrative.)

The universal lesson here is not complicated: estate planning operates on attorney capacity and legal processing time, not on your personal readiness. The legislative deadline is fixed. Your attorney’s calendar is not.

What Is Actually at Stake

Here is the number that matters. The current federal estate tax exemption sits at $13.61 million per individual, or $27.22 million for married couples, as set by the 2017 Tax Cuts and Jobs Act. If Congress does not act, that exemption sunsets on January 1, 2026, reverting to roughly $7 million per individual, adjusted for inflation. The Tax Policy Center projects that approximately 25,000 additional estates per year would become taxable under the lower threshold — a group that includes a significant share of business owners, real estate investors, and privately held company founders who are not traditionally considered “ultra-wealthy.”

The federal estate tax rate above the exemption is 40%. Not a rounding error. Not a minor adjustment. Forty cents on every dollar above the threshold.

A Bloomberg Tax survey conducted in late 2023 found that 68% of high-net-worth individuals with estates between $10 million and $30 million had not updated their estate plans in the prior 24 months. Most people get this wrong — they treat estate planning as a one-time document rather than a living financial position that requires active management.

Side A: The Case for Acting Now — SLATs and GRATs

Advisors in the repositioning camp are overwhelmingly directing clients toward two structures: Spousal Lifetime Access Trusts (SLATs) and Grantor Retained Annuity Trusts (GRATs).

A SLAT allows one spouse to make an irrevocable gift into a trust that benefits the other spouse, locking in today’s higher exemption before the sunset. If David had fully funded his SLAT in early 2024 as planned, he would have sheltered an additional $4 million from the taxable estate, representing a potential $1.6 million in avoided federal estate tax at the 40% rate.

Pro Tip: The IRS has confirmed, under Revenue Ruling 2019-09 and related guidance, that gifts made under the current higher exemption will not be “clawed back” if the exemption later decreases. In plain language: if you make a qualifying gift into an irrevocable trust today using the $13.61 million exemption, the IRS cannot retroactively tax that gift after the exemption drops. The protection is real. The window to use it is not permanent.

GRATs work differently, transferring appreciation out of the taxable estate while the grantor retains an annuity stream. The IRS Section 7520 rate, currently at 5.2% as of January 2025, serves as the hurdle rate for GRAT transfers. Assets that grow faster than 5.2% annually pass to heirs estate-tax-free. In a diversified portfolio with meaningful equity or real estate exposure, beating that hurdle is achievable — though not guaranteed.

The core argument for acting now comes down to a simple binary: the exemption either sunsets or it doesn’t. If it doesn’t, the trust structures still function as intended wealth transfer vehicles. If it does sunset, the families who acted will have preserved millions. The asymmetry is extreme.

Side B: The Case for Patience — And What It Actually Costs

Not every advisor is recommending immediate action. Some in the wait-and-see camp argue that irrevocable trust structures sacrifice flexibility — and in a down market or business liquidity event, that inflexibility carries real cost.

Reality Check: What does “flexibility” actually cost in a down market? Consider a business owner who funds a $5 million SLAT with closely held company shares. If that business needs a capital injection two years later, those assets are locked inside an irrevocable trust — unavailable without complex legal restructuring. Depending on the cost of that restructuring and the opportunity cost of constrained liquidity, the price of “acting early” could range from $50,000 in legal fees to several hundred thousand dollars in forgone business growth. This is a real tradeoff, not a technicality. Model it before you commit.

There is also a credible political argument. Congress has extended expiring tax provisions before, sometimes at the eleventh hour. The 2012 fiscal cliff negotiations resulted in a permanent patch. Some advisors believe a similar compromise is likely, reducing the urgency of irrevocable commitments made under a deadline that may shift.

The honest counterpoint to this argument is timing risk. If Congress does act, it will likely happen in late 2025 — and estate attorneys will be completely overwhelmed. David’s story is not an anomaly. It is a preview.

When is the last time your advisor stress-tested your estate plan against a worst-case legislative scenario?

If the answer is “never” or “a few years ago,” that is the problem. The bond allocation decisions you make in 2026 will matter far less than whether your estate structure is correctly positioned before the exemption drops.

What the Data Says High-Net-Worth Families Are Actually Doing

According to a 2024 survey by Cerulli Associates, 54% of advisors serving clients with over $5 million in investable assets reported an increase in irrevocable trust formations compared to 2022. SLAT filings in particular accelerated through Q3 and Q4 of 2024.

The repositioning is not hypothetical. It is happening right now, quietly, in estate attorney offices and family office meetings across the country. The families doing nothing are not choosing patience. They are choosing exposure.

Warning: Do not attempt to establish a SLAT between spouses who have already used their full lifetime exemption. Gifts to the trust will be partially or fully taxable at the current 40% rate, defeating the purpose entirely. Pull your IRS Form 709 history before any SLAT discussion with your attorney. This is the single most common and costly mistake in the SLAT setup process.

Let me be direct about this: the families who will be fine in 2026 are not necessarily the wealthiest ones. They are the ones who confirmed their attorney had bandwidth in Q1 of 2025, not Q4.

Your Next 3 Steps

Step 1: Pull your most recent estate plan document and check the date on the first page. If it was drafted or last reviewed more than 18 months ago, mark it for immediate revision — the exemption threshold alone has changed significantly since the 2017 TCJA, and your plan may not reflect your current asset mix or exposure.

Step 2: Before March 2025, contact a board-certified estate planning attorney — not a generalist, not your business attorney — and ask specifically whether your current asset mix qualifies for SLAT funding under the existing exemption, and what the realistic timeline is to complete the documentation. Attorney capacity is the binding constraint right now, not your decision timeline.

Step 3: Ask your financial advisor to run a side-by-side projection this week: your current estate tax exposure at the $13.61 million exemption versus your exposure after a full sunset to approximately $7 million. Get the actual dollar figures in writing, not percentages. If your advisor cannot produce that comparison within five business days, that tells you something important about the quality of your advisory relationship.

The 2025 exemption sunset is not a rumor or a planning exercise. It is a scheduled legislative event with a 40% tax rate attached to the assets it captures. David thought he had time. He lost $1.6 million in potential tax savings because the calendar disagreed with his schedule.

Do the math. Then make the call.