Latest / The High Net Worth Podcast with Fexingo: Wealth Management, Tax Strategy, and Affluent Finance / How Ultra-Wealthy Families Use Credit Shelter Trusts for Estate Tax Planning
Transcript
- Lucas: So let's say you're a married couple with a combined net worth of about twenty-seven million dollars. Not ultra ultra wealthy by family office standards, but comfortably above the current federal estate tax exemption threshold, which sits at about thirteen point six one million per individual in 2026. Luna: Right, so roughly double that for a couple — but only if they actually plan for it. Otherwise the second spouse's death could trigger a massive tax bill. Lucas: Exactly. And that's where the Credit Shelter Trust, also called a Bypass Trust or an AB Trust, becomes the workhorse of high-net-worth estate planning. It's not flashy — no one writes a book about it — but it's probably the single most effective tool for married couples to preserve wealth across generations. Luna: Walk me through the basic mechanics. How does it actually work when the first spouse dies? Lucas: Sure. So imagine a couple, let's call them David and Sarah. They have a total estate of twenty-seven point two two million — just to pick a number that's exactly double the 2026 exemption. David dies first. Under a properly drafted credit shelter trust, an amount equal to David's remaining exemption — thirteen point six one million — flows into a trust. The rest, another thirteen point six one million, goes directly to Sarah, either outright or into a marital trust. Luna: So the trust portion is basically carved out of David's estate and placed beyond the reach of estate tax on Sarah's subsequent death. Lucas: Exactly. The trust is irrevocable at David's death. Sarah can receive income from it — often all the income — and she can access principal for health, education, maintenance, and support. But the trust assets are not part of her taxable estate. So when Sarah dies, assuming she still has her thirteen point six one million share plus whatever growth, that entire trust bypasses her estate tax entirely. The result: the couple can pass up to twenty-seven million or more to their heirs without a penny of federal estate tax. Luna: And if they didn't have the trust, what happens? Just portability instead? Lucas: Good question. Portability is the simpler alternative introduced by the Tax Cuts and Jobs Act. It allows the surviving spouse to elect to use the deceased spouse's unused exemption. So if David dies and doesn't use his full exemption, Sarah can file a portability election on the estate tax return and add David's exemption to her own. That works on paper. But there's a catch: portability only covers the federal estate tax. It does not protect against state-level estate taxes in states like Massachusetts, Oregon, Washington, or Connecticut, which have their own exemptions often much lower than the federal level. Luna: And those state exemptions can be as low as one million dollars in some states, right? Lucas: Exactly. Massachusetts, for example, has a one million dollar exemption and a so-called cliff: if your estate exceeds one million, the entire estate is taxed, not just the excess. So portability does nothing for that. A credit shelter trust, if properly structured, can also shelter assets from state estate tax because the trust's assets are not owned by the surviving spouse. Luna: So for a couple living in a high-estate-tax state, the trust is almost mandatory. Lucas: Absolutely. And there's another nuance: the trust should be funded with assets that are likely to appreciate. Because the growth inside the trust is also outside the survivor's estate. So you want stocks, real estate, business interests — not cash or bonds. The classic strategy is to put the fastest-growing assets into the credit shelter trust and leave slower-growth assets for the marital share. Luna: That makes sense. But what about the generation-skipping transfer tax? Doesn't that complicate things? Lucas: It does. The GST tax exemption can also be allocated to the trust, allowing the trust to continue for multiple generations without incurring GST tax at each generational level. Many credit shelter trusts are drafted as dynastic trusts that last for centuries, with the beneficiaries receiving income and principal distributions but never owning the assets outright. Luna: Right. So the trust becomes a permanent wealth warehouse, essentially. Lucas: Precisely. And there's one more technical point that I think is often overlooked: the trust must be properly funded during life or at death via the will. If the couple relies solely on beneficiary designations — like naming each other as beneficiaries on retirement accounts — the credit shelter trust never gets funded. The assets pass directly to the survivor, and the planning fails. Luna: So you need to have the trust named as the beneficiary on life insurance policies and maybe on a portion of retirement accounts, right? Lucas: Yes, but careful with retirement accounts. If you name the trust as beneficiary of an IRA, the required minimum distributions are calculated based on the oldest beneficiary's life expectancy — typically the surviving spouse's. That can accelerate distributions and income tax. So many planners recommend using non-retirement assets to fund the credit shelter trust, like brokerage accounts, real estate, or life insurance proceeds held in an irrevocable life insurance trust. Luna: That's a key nuance. So the funding assets really matter. And I assume the trust document has to be drafted before the first death — you can't create it retroactively. Lucas: No, it has to be in place. And it's typically part of a revocable living trust or a will-based A-B trust plan. The credit shelter trust is often called the 'B trust' or 'bypass trust,' and the marital trust is the 'A trust.' The surviving spouse controls both, but only the A trust is included in her estate. Luna: One thing I've always wondered: if the exemption amount increases significantly in the future — say it goes to twenty million per person — could the credit shelter trust become overfunded? I mean, if David dies and funds the trust with the full exemption, but later the exemption rises, Sarah's own exemption plus the trust might exceed what the family needs. Lucas: That's a real risk, and it's one reason some planners prefer a formula clause that pegs the funding amount to the exemption at the time of death. The trust is funded with the lesser of the exemption amount or the deceased spouse's assets. But if the exemption rises, the trust might be funded with less, leaving more assets in Sarah's estate — which could then be subject to tax if her estate exceeds the new exemption. So it's a trade-off. Some families use a disclaimer trust instead: the surviving spouse can disclaim assets into the trust within nine months of the death, giving them flexibility based on the exemption in effect at that time. Luna: Disclaimers are powerful but they require careful timing and no acceptance of benefits. If Sarah takes a distribution from an account, she can't later disclaim it. Lucas: Exactly. And this is where having a good estate planning attorney is critical. The credit shelter trust is a well-established tool, but it's not a one-size-fits-all. For couples with estates significantly below the exemption, it may not be necessary. For those well above, it's usually combined with other strategies like GRATs, IDGTs, and charitable remainder trusts. Luna: Let's talk about the current environment. With the federal exemption scheduled to sunset at the end of 2025 to around five million per person adjusted for inflation, there's a lot of urgency for planning. Lucas: That's the big topic right now. If the exemption drops to roughly six to seven million per person in 2026, many more families will be exposed to estate tax. A credit shelter trust locked in now, even if not needed today, can be a powerful hedge. But you have to consider the cost of drafting and maintaining the trust versus the potential tax savings. For a twenty-seven million dollar estate, the potential tax savings at a forty percent rate are enormous — over ten million dollars. Luna: Yeah, that's hard to ignore. Ten million in tax savings for a few thousand dollars in legal fees? The return on investment is absurd. Lucas: Right. And that's the reason this tool is so widely used among high-net-worth families. It's been around since the early twentieth century, it's battle-tested, and it works. But it's not automatic. The trust must be properly drafted, funded, and administered. If the surviving spouse treats the trust assets as her own — commingling funds, failing to file separate tax returns — the IRS could argue the trust is a sham and include the assets in her estate. Luna: So the discipline of maintaining separate accounts and separate tax IDs is essential. Lucas: Yes. The trust needs its own taxpayer identification number, its own brokerage account, its own bank account. The surviving spouse can be the trustee, but she must act as a fiduciary, not as an owner. And she should keep careful records of all distributions. Luna: What about using a credit shelter trust in conjunction with a qualified terminable interest property trust — the QTIP trust? I've heard those combined in an a b c structure. Lucas: That's a more advanced planning technique. Some families use a three-trust structure: the credit shelter trust, a marital QTIP trust, and a separate gst exempt trust. The QTIP trust allows the deceased spouse to control who ultimately receives the assets after the surviving spouse's death, while still qualifying for the marital deduction. Combined with the credit shelter trust, it provides maximum flexibility for blended families and multi-generational planning. Luna: It's fascinating how these old structures remain relevant even as the tax code changes. The credit shelter trust is a classic. Lucas: Absolutely. And it's worth noting that even if the estate tax were repealed — which has been discussed but never fully enacted — the credit shelter trust still provides asset protection from creditors and future spouses, and can control the disposition of assets. So it's not purely a tax tool. Luna: That's a good point. There are non-tax reasons to use it. And given the uncertainty about future exemption levels, having it in place is like an insurance policy. Lucas: Exactly. And on that note, if today's episode helped you think through your own estate planning — or just gave you a clearer picture of how these trusts work — that's the kind of value we aim for. If it was worth a coffee to you, there's a link at buy me a coffee dot com slash fexingo. Genuinely no pressure, but listener support is what keeps this show ad-free and independent. Luna: Yeah, it's a small way to say this content matters to you. And we really appreciate it. Lucas: So back to the mechanics — one more nuance I want to highlight: the importance of the 'Crummey power' when making gifts to the trust. If you want to contribute additional assets to the credit shelter trust during life — say, to use your annual gift tax exclusion — you need to give the beneficiaries a limited right to withdraw the gift for a short period, typically thirty days. That's what makes the gift a present interest and qualifies for the exclusion. Luna: Right, the Crummey power. Named after the court case. If the beneficiaries don't have that withdrawal right, the gift is a future interest and doesn't qualify for the annual exclusion. Lucas: Exactly. So even though the trust is primarily funded at death, some families use it during life to shift appreciation out of their estates. For example, if David gifts an appreciating asset to the credit shelter trust and lives another ten years, the growth is outside his estate. Combine that with the exemption at death, and you've effectively doubled the tax-free transfer. Luna: That's a powerful strategy for families with estates well above the exemption. But it requires sophisticated planning. Lucas: It does. And that's why we're covering it here. The credit shelter trust is not a DIY tool. But understanding it empowers you to ask the right questions of your advisor. Questions like: 'Should we have an A-B trust? How should we fund the bypass trust? Are we using portability or a credit shelter trust for state tax purposes?' Luna: And if your advisor can't answer those questions clearly, it might be time to find a new advisor. Lucas: Fair point. So to wrap up: the credit shelter trust remains a foundational strategy for married couples with estates above the exemption threshold. It's not glamorous, but it works. And in a time of potential exemption sunsets and rising state taxes, it's more relevant than ever. Luna: And as always, knowing the mechanics puts you in control. Thanks, Lucas. Lucas: Thanks, Luna. And thanks to our listeners. Until next time.