Holding a large block of a single stock, whether from years at one employer, an inheritance, or an early investment that grew far past what you expected, creates a specific kind of problem. Selling it outright to diversify can mean a capital gains bill large enough to change the math on the whole decision. A charitable remainder trust is one of the tools advisors sometimes discuss in this situation, and it works differently than most people assume the first time they hear about it.
This isn't a recommendation to use one. It's a walk through what a CRT actually does, where it tends to fit and where it doesn't, and the questions worth bringing to a tax advisor before you consider funding one with a concentrated position.
What a charitable remainder trust actually does
A charitable remainder trust is an irrevocable trust you fund with an asset, in this case appreciated stock, that then pays you (or another named beneficiary) an income stream for a set term or for life. When that term ends, whatever remains in the trust goes to one or more charities you named when you set it up. The "remainder" in the name refers to that final gift, not to what's left over as an afterthought.
The mechanism that makes this relevant to a concentrated position is that the trust itself is generally exempt from capital gains tax when it sells the appreciated stock inside the trust. You, as the person who funded it, don't pay tax on the full gain in the year you transfer the shares in. Instead, the income you receive back out over the trust's term is taxed under a specific ordering system that draws from different income tiers, which your tax advisor needs to model against your actual basis and holding period.
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CRAT versus CRUT: two different payout structures
There are two common versions, and the difference matters more than it might first appear. A charitable remainder annuity trust, a CRAT, pays a fixed dollar amount each year, set when the trust is created and never adjusted regardless of how the trust's investments perform. A charitable remainder unitrust, a CRUT, pays a fixed percentage of the trust's value, revalued annually, so the payout moves with the portfolio.
A CRAT offers predictability but no additional contributions are allowed after funding and no adjustment if the trust underperforms. A CRUT allows additional contributions later and its payout can grow if the underlying assets do, but it also means income can decline in a down year. Which structure fits depends heavily on whether you're relying on the payout for living expenses or treating it as supplemental income, a distinction worth being explicit about with your advisor before drafting begins.
How this changes the mechanics of selling concentrated stock
Under a typical outright sale, you'd recognize the full capital gain in the year of sale and pay tax on it before reinvesting whatever is left. Funding a CRT with the stock instead moves the sale inside the trust, where the immediate capital gains hit doesn't apply to you personally. The tradeoff is that you no longer own the asset outright. It belongs to the trust, and you've committed to the eventual charitable remainder.
This is the part that trips people up: a CRT isn't a way to avoid tax on a concentrated position and still keep full access to the proceeds. It's a way to convert a lump-sum, fully taxable event into a income stream paid out over time, with a charitable gift as the price of that structure. Whether that tradeoff makes sense depends on your philanthropic goals as much as your tax situation, which is why this conversation usually involves more than just a tax advisor.
The income tax deduction, and why it's smaller than people expect
Funding a CRT generally generates a partial charitable income tax deduction in the year you fund it, based on the present value of the remainder interest that will eventually pass to charity. That value is calculated using IRS actuarial tables, your age or the trust term, the payout rate, and prevailing interest rate assumptions at the time of funding.
The deduction is almost never equal to the full value of the stock you contribute, because you're only getting credit for the portion charity is projected to eventually receive, discounted back to today. First-time CRT conversations sometimes start from an assumption that the deduction will offset most of the transferred value, and walking through the actual calculation early avoids that mismatch in expectations.
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Payout rate and term rules worth understanding upfront
The IRS requires the annual payout rate to be at least 5% and generally no more than 50% of the trust's initial value. The trust term is either a period of years, capped at 20, or the life or lives of named beneficiaries. There's also a "10% remainder test," a requirement that the projected value passing to charity at the end of the term must be at least 10% of the trust's initial funding value, calculated using the same actuarial assumptions as the deduction.
These aren't negotiable design choices so much as constraints your advisor works within. A payout rate set too high relative to the term can fail the 10% test outright, which means the trust structure as proposed simply isn't allowed. This is one of the more technical topics to review early, before you're emotionally attached to a specific payout number.
Choosing a trustee and coordinating the team
A CRT needs a trustee, someone or some institution responsible for administering the trust, filing its tax returns, and managing the invested assets after the stock is sold inside the trust. Some people serve as their own trustee, though that comes with fiduciary responsibilities and administrative burden. Others use a corporate trustee or a donor-advised fund sponsor experienced in CRT administration.
Setting one up typically involves an estate planning attorney to draft the trust document, a tax advisor to model the deduction and income tax treatment, and often the financial advisor who will manage the assets once they're liquidated inside the trust. Capivise's questions-to-ask-an-advisor guide covers groundwork worth doing before any of those conversations start, regardless of which advisor you sit down with first.
Where a CRT fits next to other concentrated-stock tools
A CRT is one option among several that advisors discuss for concentrated positions, alongside tools like exchange funds, qualified opportunity zone funds, and structured installment sales, each with a different tradeoff between tax deferral, control, and liquidity. A CRT is distinct from the others in that it involves an irrevocable charitable commitment as part of the structure, which is either a feature or a dealbreaker depending on your philanthropic intent.
If diversifying a concentrated position without a charitable component is the actual goal, a CRT probably isn't the right starting point, and Capivise's tax-efficient reinvestment advisor matching page outlines the broader category of advisors who work through these tradeoffs for concentrated positions generally, CRTs included but not assumed.
Common pitfalls worth flagging before you commit
- Assuming the trust is revocable. It isn't. Once funded, you generally cannot unwind a CRT and get the asset back, which makes the decision to fund one worth more deliberation than a typical portfolio move.
- Underestimating the administrative cost. Ongoing trustee fees, tax preparation for the trust itself, and investment management fees on the trust's assets add a layer of cost that should be weighed against the tax deferral benefit.
- Picking a charity or charities without real intent. Because the remainder interest is genuinely irrevocable, naming a charity as a tax mechanism rather than out of actual philanthropic interest tends to create regret later, even when the numbers worked out.
- Not modeling the income tax on distributions. The payments you receive back out aren't tax-free. They're taxed under a tiered system based on the trust's income and gains, and your advisor should walk you through a realistic projection, not just the headline deduction.
- Overlooking state-level treatment. Federal rules govern the trust's income tax exemption on the sale inside the trust, but state tax treatment of the distributions you later receive can differ depending on where you live and where the trust is administered. This is worth raising explicitly if you've moved states recently or are considering a move during the trust's term.
Timing the funding relative to a pending sale
One detail that surprises people: a CRT generally needs to be funded with the stock itself, not with cash from a sale you've already agreed to. If you've already signed a binding agreement to sell the shares before the trust is funded, the IRS may treat the gain as already realized by you personally under the step transaction doctrine, which would defeat the purpose of using the trust at all. This makes sequencing a topic to raise with your tax advisor well before you're in active sale discussions, not after a buyer is already lined up.
Verifying who's guiding you through the decision
Because CRTs sit at the intersection of tax law, trust and estate law, and investment management, it's worth confirming the credentials of everyone involved before you sign trust documents. The IRS publishes general guidance on charitable trusts that's useful background reading before your first advisor conversation. For a plain-language overview of how the trust structure works, Wikipedia's entry on charitable remainder trusts is a reasonable primer if the mechanics above are new to you.
If a financial advisor will be managing the trust's invested assets after the stock is sold, FINRA's public resources are a starting point for checking that advisor's background and disciplinary history. If you're working with a fee-only advisor as part of the planning team, NAPFA's directory and educational resources explain what that designation actually requires. And if your tax advisor is a CPA, the AICPA's public resources outline what CPA licensure and specialty credentials involve, useful context when deciding how much trust-specific experience to look for.
The takeaway
A charitable remainder trust can be a genuinely useful tool for someone holding a concentrated stock position who also has real philanthropic intent, because it converts an immediate, fully taxable sale into a deferred income stream with a charitable gift at the end. It is not a general-purpose tax shelter, and the irrevocable nature of the commitment means it deserves more deliberation than most portfolio decisions.
If you're still assembling the team to evaluate whether this fits your situation, Capivise's advisor verification resource is a reasonable place to start checking backgrounds before you commit to working with anyone, alongside the CRT-specific topics above. And if you're not yet sure which type of advisor you need for a decision this specific, Capivise's advisor matching tool is built to help narrow that down.
