Conduit or Accumulation? The Trust Choice That Decides Who Controls Your IRA

There's a sentence in most trusts that decides whether a child's inheritance is actually protected or simply handed over on a delay. Most clients have never read it, and many have never been told it's in there.

The sentence answers one question. When the trustee receives money out of your IRA, does the trustee have to pass it straight through to your beneficiary, or is the trustee allowed to hold onto it?

If it has to go through, you have what the regulations call a conduit trust. If the trustee can hold it, you have an accumulation trust. Federal tax law defines the two terms in exactly those words, at Treas. Reg. § 1.401(a)(9)-4(f)(1)(ii). Which one you have determines what your money is actually protected from.

Before 2020 this was a close question with a fairly clear answer — and then the SECURE Act reversed it.

What each one does

A conduit trust is a pipe. Every dollar the trustee receives from the retirement account must go out on receipt, either paid to the beneficiary or spent for the beneficiary's benefit. The trustee may control the form of the payment, so tuition can go directly to a school and rent to a landlord, and a car can be bought and titled for the beneficiary. What the trustee cannot do is keep the money, invest it inside the trust, or hold it back from somebody's creditor.

An accumulation trust is a container. The trustee may retain what comes out of the IRA and hold it on whatever terms you wrote, distributing it for health and education, keeping it away from a creditor, or holding it until a beneficiary is older and steadier than they are today.

Everything else follows from that difference.

Why the tax law cares

For a trust named as IRA beneficiary to get favorable treatment, the law has to "see through" it to the human beings behind it. The next question is which of those human beings get counted, because the answer sets the payout period for the whole trust. Where there's more than one counted beneficiary, the payout is measured by the oldest of them, and a single counted beneficiary who doesn't qualify for favorable treatment can drag the entire trust down. Treas. Reg. § 1.401(a)(9)-5(f)(1).

This is where the two structures separate.

In a conduit trust, only the current beneficiary or beneficiaries get counted. Every dollar must be paid out or spent on receipt, so nobody standing behind them can ever receive retirement money, and the remainder beneficiaries drop out of the analysis entirely. That's a genuine advantage. It means a conduit trust is essentially immune to the classic trap. You can name a charity, or your estate, or a chain of distant cousins as remainder beneficiaries and none of it matters, because nothing will ever reach them.

In an accumulation trust the remainder beneficiaries get counted too. If the trustee can hold retirement money, someone else might eventually receive it, so the regulation counts the people who could. That opens a door, and things do walk through it. The 2024 final regulations were kinder here than expected, in that the count stops at the first tier of remainder beneficiaries and doesn't chain outward forever to remote contingent takers. Treas. Reg. § 1.401(a)(9)-4(f)(3)(ii)(A). The first tier is still plenty of room for trouble.

The conduit trust used to be the safer choice

Under the old law a conduit trust let a young beneficiary stretch withdrawals across a lifetime, which meant decades of tax-deferred growth. The forced pass-through was the price, and it looked like a low price, because each annual withdrawal was small. A twenty-five-year-old beneficiary might have received well under two percent of the account in the first year. The bulk of it stayed sheltered inside the IRA.

The SECURE Act ended the lifetime stretch for most beneficiaries. With limited exceptions the account now has to be emptied within ten years of your death. 26 U.S.C. § 401(a)(9)(H).

Run that through a conduit trust and look at what you've built. Every dollar must go out on receipt, and every dollar must come out of the IRA inside ten years. So for most beneficiaries the entire account is in your beneficiary's hands within a decade, and the trustee has no power to slow that down.

The exceptions are narrow. A conduit trust for your own minor child, for a beneficiary no more than ten years younger than you, or for a disabled or chronically ill beneficiary can still stretch over a life expectancy. For the adult child, the grandchild, the niece, ten years is the whole runway.

That's a problem if what you were actually worried about was a child's divorce, a lawsuit, a bankruptcy, a spending habit, or a beneficiary who really shouldn't come into several hundred thousand dollars at thirty-two. A conduit trust doesn't answer any of those questions now. It never protected the money in the first place, it only slowed the money down, and it doesn't slow it down much anymore.

This is the main reason documents drafted before 2020 need a fresh look. A conduit trust written in 2015 was probably sensible planning at the time, and it may be doing very little for you today. That's not a criticism of whoever drafted it.

What switching costs

If accumulation trusts can protect and conduit trusts can't, the obvious question is why anybody would still pick a conduit.

The answer is the tax brackets. Trusts are taxed on a compressed schedule that reaches the top rate almost right away. In 2026 a trust pays 10% on the first $3,300 of retained taxable income, 24% from there up to $11,700, 35% up to $16,000, and 37% on everything above that. A single individual doesn't reach 37% until $640,600 of taxable income. A trustee who keeps a $70,000 IRA withdrawal inside the trust is paying the top federal rate on most of it, where the beneficiary might have paid 22%.

Three things take most of the sting out of that.

A trustee who distributes pushes the tax along with the money. When a trust distributes income to a beneficiary, the income and the tax go out together, under 26 U.S.C. §§ 661–662. An accumulation trust is permitted to accumulate rather than required to, and that discretion cuts both ways.

There's also the 65-day election. A trustee may make distributions up to 65 days after the year closes and treat them as made in the prior year. 26 U.S.C. § 663(b). That lets the trustee look at the actual numbers before deciding whether protection is worth the tax bill, which is why a well-administered accumulation trust rarely pays 37% by accident.

Roth money solves the problem outright. Qualified Roth withdrawals are tax-free, so there's no rate penalty for keeping them inside the trust. If you want a protective trust, converting to a Roth during your lifetime is one of the cleaner fixes available, and it's something only you can do. A trustee can't convert an inherited account.

Special needs beneficiaries are the exception

There's one situation where accumulation isn't a trade-off at all, and where a conduit trust would do real harm.

Where a beneficiary is disabled or chronically ill, forcing money out to or for them, which is what a conduit trust does, can disqualify them from SSI and Medicaid. Federal law provides a specific structure for this. A trust that qualifies as an applicable multi-beneficiary trust under Treas. Reg. § 1.401(a)(9)-4(g) gets a life-expectancy payout measured by the disabled beneficiary and is also allowed to accumulate, so you get both without giving anything up.

The requirements are strict, and there are three. Every trust beneficiary must be a designated beneficiary. The trust must identify one or more disabled or chronically ill individuals as current beneficiaries. And no one else may have any right to the retirement account until all of those individuals have died.

That first requirement used to wreck otherwise excellent planning, because families frequently want whatever is left to go to a disability-related charity, and a charity isn't a designated beneficiary. Congress fixed it, so a qualifying charity named as remainder beneficiary no longer breaks the structure. Treas. Reg. § 1.401(a)(9)-4(g)(3). The word "qualifying" is doing some work there, since the regulation borrows a definition that leaves out private foundations, supporting organizations, and donor advised funds.

How to decide

Start with what you're actually worried about.

A conduit trust makes sense where your beneficiaries are financially stable adults, you trust them with the money, and you mainly want orderly administration and clean tax treatment. It also leaves you free to name a charity or an unusual remainder beneficiary without anyone having to analyze the consequences.

An accumulation trust makes sense where protection is the point. A beneficiary with creditors, a fragile marriage, a spending or substance problem, a special needs diagnosis, or simply an age at which a large sum would do damage. You accept the tax cost, you name a trustee who will actually manage it, and you think hard about funding it with Roth assets.

You don't have to pick one answer for every beneficiary, either. Getting genuinely separate treatment usually means naming separate trusts on the beneficiary form rather than creating separate shares inside a single trust, because otherwise the least favorable beneficiary can govern the whole account. That's a drafting-and-form question worth raising specifically.

One last thing

If your trust was drafted before 2020, the conduit-or-accumulation decision inside it was made under a law that no longer exists.

What the fix looks like depends on the document. A revocable trust can usually be amended. An irrevocable trust can't be, although there may be other routes available. In a good many cases the beneficiary form needs updating as well. The only way to know which situation you're in is to have somebody read what you actually signed.

The Law Office of Jacobie K. Whitley works with individuals and families in the District of Columbia and Maryland on estate planning, trusts, and business succession. If your trust predates the SECURE Act, it's worth looking at what it says about retirement benefits.

This article covers federal tax law as of August 2026 and is general information rather than legal or tax advice. It doesn't create an attorney-client relationship, and nothing here promises a particular result. These rules are technical and the consequences of getting them wrong are hard to reverse after somebody has died. Jacobie K. Whitley is licensed in the District of Columbia and Maryland. Please talk to an attorney about your own situation.