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

There is a sentence in most trusts that decides whether a child's inheritance is really protected or just handed over on a delay. Most clients have never read it. Plenty have never been told it is 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. 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 has to go out on receipt, either paid to the beneficiary or spent for the beneficiary's benefit. The trustee can 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 can 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 comes out of that one 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. If there is more than one counted beneficiary, the payout is measured by the oldest of them, and a single counted beneficiary who does not 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 has to 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 completely. That is a real advantage. It means a conduit trust is close to 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, somebody 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 does not 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 have built. Every dollar has to go out on receipt, and every dollar has to come out of the IRA inside ten years. For most beneficiaries the entire account is in your beneficiary's hands within a decade, and the trustee has no power to slow it 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 is 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 should not come into several hundred thousand dollars at thirty-two. A conduit trust does not answer any of those questions now. It never protected the money in the first place. It only slowed the money down, and it does not 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 is no criticism of whoever drafted it.

What switching costs

If accumulation trusts can protect and conduit trusts cannot, 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 does not 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%.

Most of the sting comes out of that, though.

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 may accumulate. It does not have to, and that discretion cuts both ways.

There is also the 65-day election. A trustee can 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 is 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 is something only you can do. A trustee cannot convert an inherited account.

Special needs beneficiaries are the exception

There is one situation where accumulation costs you nothing at all, and where a conduit trust would do real harm.

If 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. Every trust beneficiary has to be a designated beneficiary. The trust has to 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 is not 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 are actually worried about.

A conduit trust makes sense if 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 anybody having to analyze the consequences.

An accumulation trust makes sense when 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 do not have to pick one answer for every beneficiary, either. Getting genuinely separate treatment usually means naming separate trusts on the beneficiary form instead of creating separate shares inside a single trust, because otherwise the least favorable beneficiary can govern the whole account. That is 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 cannot 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 are in is to have somebody read what you actually signed.

Questions people actually ask

What is a conduit trust?

A conduit trust is a trust that has to pay out every dollar it receives from a retirement account immediately, either to the beneficiary or for the beneficiary's benefit. The trustee cannot retain any of it. Treas. Reg. § 1.401(a)(9)-4(f)(1)(ii).

What is an accumulation trust?

An accumulation trust is a trust whose trustee is allowed to retain retirement account withdrawals inside the trust instead of passing them straight through to the beneficiary.

Which is better after the SECURE Act, a conduit trust or an accumulation trust?

For asset protection, an accumulation trust. A conduit trust now has to empty the whole account into the beneficiary's hands within ten years for most beneficiaries, so it protects very little. A conduit trust still makes sense for financially stable adult beneficiaries and for simple tax treatment.

Do remainder beneficiaries count in a conduit trust?

No. Only current beneficiaries are counted, because no retirement money can ever reach the remainder beneficiaries. In an accumulation trust the first tier of remainder beneficiaries is counted. Treas. Reg. § 1.401(a)(9)-4(f)(3)(ii)(A).

Why do accumulation trusts pay more tax?

Trusts hit the 37% federal bracket at $16,000 of retained taxable income in 2026, while a single individual does not reach it until $640,600. A trustee who distributes income, or who uses the 65-day election under 26 U.S.C. § 663(b), shifts that tax to the beneficiary's own rate.

Can a conduit trust be used for a beneficiary with special needs?

It should not be. Forcing money out to or for a disabled beneficiary can cost them SSI and Medicaid. An applicable multi-beneficiary trust under Treas. Reg. § 1.401(a)(9)-4(g) allows accumulation and still gets a life-expectancy payout.

Can I change a conduit trust into an accumulation trust?

If the trust is revocable, usually yes, by amendment. If it is irrevocable, not directly, though decanting, a non-judicial settlement agreement, or a court modification may be available depending on the document and on state law.

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 is worth looking at what it says about retirement benefits. You can book an estate planning session.

This article covers federal tax law as of August 2026 and is general information, not legal or tax advice. It does not 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.