Trust Investment Policy for Successor Trustees

As successor trustee, you are required by law to invest trust assets prudently. Here is what that actually means — and how to document it before you make a single investment decision.

The impartiality problem: why trust investing is harder than personal investing

When you invest your own money, you have one goal — your financial wellbeing. When you invest trust assets, you often have two competing sets of interests to balance:

• Income beneficiaries — often the surviving spouse or parent, who rely on trust distributions now. They want income: dividends, interest, rental income.
• Remainder beneficiaries — often adult children who will receive the remaining trust assets later. They want growth: the portfolio should be larger when they eventually receive it.

These interests conflict directly. A portfolio tilted toward income (high-yield bonds, dividend stocks, REITs) benefits the current beneficiary at the expense of growth. A pure growth portfolio starves the current beneficiary of income. The UPIA's impartiality requirement¹ means you cannot simply favor one class over the other — you must invest in a way that is fair to both, and document why your allocation is reasonable given the trust's purposes.

This is the single most common mistake individual successor trustees make: managing the portfolio primarily to generate income for the current beneficiary (usually a surviving parent or sibling) without considering the remainder beneficiaries' interests at all. That is a breach — even if no one complains immediately.

The total return approach and how it resolves the conflict

The modern answer to the income/remainder conflict is the total return approach, authorized in most states through the Uniform Principal and Income Act (UPAIA) and its "power to adjust" provision.²

Under a total return framework:

• The portfolio is invested for total return — stocks, bonds, and other assets chosen for risk-adjusted performance, not yield.
• A defined payout rate (typically 3–5% of a rolling average trust value) is distributed to the income beneficiary regardless of whether the distribution comes from dividends, interest, or principal.
• The trustee exercises the "power to adjust" (or uses a unitrust election, where available) to recharacterize principal as income to fund distributions.

This approach eliminates the incentive to reach for yield. The income beneficiary receives a predictable stream; the remainder beneficiaries' principal is not systematically eroded. Whether this approach is right for a given trust depends on state law, the trust document, and beneficiary circumstances — which is why it needs to be documented and ideally reviewed with counsel before adoption.

What a trust Investment Policy Statement contains

A trust IPS does not need to be a lengthy document. It needs to be specific, dated, signed, and updated when circumstances change. Most trust IPSs run 2–5 pages and address the following:

1. Trust purpose and beneficiary description

Identify the trust by name, the beneficiaries by class (current income beneficiaries, remainder beneficiaries), and the trust's primary purpose. Example: "The Smith Family Trust was established to provide income support for Jane Smith (age 71) during her lifetime, with remainder to her adult children. Trust assets are approximately $1.8M."

2. Investment objectives

State the portfolio's objectives in plain terms: capital preservation, inflation protection, income generation, or total return growth. If using the total return approach, state the target payout rate and the smoothing method (e.g., "trailing 36-month average").

3. Target asset allocation and ranges

Set target percentages for major asset classes and acceptable ranges before rebalancing is triggered. Example:

• US equities: target 40%, range 30–50%
• International equities: target 15%, range 10–20%
• Fixed income: target 35%, range 25–45%
• Cash/short-term: target 10%, range 5–15%

The specific allocation depends on the trust's time horizon, the income beneficiary's age and needs, the remainder beneficiaries' expected inheritance timeline, and the trust's liquidity requirements. There is no universal allocation that fits all trusts — and that's exactly why the IPS must document the reasoning for yours.

4. Investment selection criteria

Describe what types of investments are permitted and preferred. A typical trust IPS restricts the trustee to publicly traded securities and diversified funds, avoids speculative instruments, requires cost-consciousness (expense ratios, transaction costs), and prohibits margin, options, and leverage. If the trust holds a specific illiquid asset (real estate, business interest), address how it will be treated and when disposition is planned.

5. Prohibited investments and conflicts

List anything explicitly prohibited — often by trust document, state law, or prudent investor standards. Common prohibitions: concentrated single-stock positions (absent documented justification), below-investment-grade bonds above a set percentage, alternative investments with limited liquidity, and any investment in which the trustee has a personal financial interest.

6. Diversification and concentration policy

UPIA requires diversification unless "special circumstances" justify retention of a concentrated position.¹ If the trust holds a large inherited stock position — common in practice — the IPS should document the justification for any retention (tax basis, family circumstances, planned disposition timeline) and a plan for reduction. An inherited concentrated stock position held indefinitely without documentation is among the highest-liability scenarios for successor trustees.

7. Delegation and advisor oversight

If you are delegating investment management to a financial advisor (which UPIA expressly permits¹), specify: who the advisor is, what authority they have, how performance will be reviewed, and how the delegation can be terminated. Delegation does not eliminate trustee responsibility — the trustee remains obligated to monitor the delegatee reasonably and with the frequency specified in the IPS.

8. Rebalancing and review schedule

State how often you will review the portfolio (at minimum annually) and what triggers a rebalancing — typically when any asset class drifts more than 5 percentage points from target. Document each annual review even if no changes are made. A portfolio reviewed annually with a written record is defensible; a portfolio left unreviewed for three years is not.

Asset allocation frameworks for common trust types

These are starting frameworks, not prescriptions. Every trust is different. Use these to anchor your own analysis.

Short-duration trust (income beneficiary age 75+, or trust expected to terminate within 5–10 years)

Capital preservation dominates. Growth is secondary since the remainder beneficiaries' timeline is short. A 30–40% equity / 60–70% fixed income allocation is common. Emphasis on investment-grade bonds and low-volatility dividend equity. Liquidity should be sufficient to fund distributions without forced sales.

Medium-duration trust (income beneficiary age 60–75, 10–20 year horizon)

Balanced approach. Equal weight to income generation and growth. A 50–60% equity / 40–50% fixed income allocation provides growth exposure while funding distributions. The total return approach works well here — a 4% payout on a broadly diversified portfolio is sustainable in most historical return environments.

Long-duration or generation-skipping trust (young beneficiaries or multi-generational design)

Growth orientation. Time horizon of 20–50+ years makes short-term volatility manageable and inflation protection critical. A 70–80% equity / 20–30% fixed income allocation is defensible when documented with reference to the long time horizon. Current income needs are minimal; remainder beneficiaries' interests dominate.

Special-needs trust

Preservation of government benefit eligibility is a primary constraint — distributions must be carefully structured to avoid disqualifying the beneficiary from Medicaid or SSI. Asset allocation is typically conservative. The IPS must address the interaction between trust distributions and benefit eligibility; counsel familiar with special-needs planning should review the policy.

The tax dimension of investment decisions

Investment decisions and tax efficiency are inseparable in trust administration. The key dynamic: trusts reach the 37% federal income tax bracket on retained income above $16,000 in 2026.⁴ An individual beneficiary in the 22% or 24% bracket pays far less on the same dollar. This creates a structural incentive to distribute income rather than accumulate it — but only if the trustee has distribution discretion under the trust document and the beneficiaries' tax situations support it.

Two investment-level decisions that affect this tradeoff:

• Asset location: Tax-efficient assets (index funds with low turnover, municipal bonds) are better suited to trusts that accumulate income, since the trust bears the compressed-bracket cost. High-turnover or income-heavy assets (REITs, actively managed funds distributing short-term gains) are better held in beneficiaries' accounts via distribution.
• Capital gains management: Capital gains allocable to principal typically stay in the trust — not passed through to beneficiaries via DNI.³ The combined federal rate on long-term gains for trusts at the top bracket is 23.8% (20% LTCG + 3.8% NIIT). Strategic timing of asset sales — avoiding realizing large gains in a single year — can prevent stacking income into the highest trust bracket.

These decisions require annual coordination between the trustee, the investment manager, and the trust's CPA. They are not one-time choices. A fee-only advisor who understands trust taxation can model the tradeoffs before each year's investment and distribution decisions.

Concentrated inherited positions: the highest-risk scenario

Many trusts inherit significant positions in a single stock — the settlor's employer shares, a family business, or stock accumulated over decades. Handling concentrated positions is among the most liability-exposed situations in trust investment management.

UPIA requires diversification unless "special circumstances" justify retention — and that justification must be documented.¹ "My father held this stock for 40 years" is not a special circumstance. Tax basis, planned liquidity events, and family-specific facts may be — but they must appear in writing before a court asks you to defend the retention.

Common approaches when a trust inherits a concentrated position:

• Systematic reduction plan — sell a fixed percentage or dollar amount quarterly over 2–4 years to spread taxable gains and transition to a diversified portfolio. Document the plan in the IPS.
• Charitable remainder trust (CRT) — donate appreciated shares to a CRT, which sells tax-free and provides an income stream. Useful when the income beneficiary has charitable intent and the position has a very low basis.
• Exchange funds — pool shares with other concentrated holders for diversification. Available only to qualified investors and requires minimum holding periods.
• Collar strategies — options-based downside protection during a planned sale timeline. Requires an advisor comfortable with these instruments.

Whatever approach is chosen, the IPS should document the current concentration, the rationale for the chosen strategy, and a timeline for achieving diversification. Courts have found trustees personally liable for retaining concentrated positions without documented justification — even when the stock happened to perform well.

Common trustee investment mistakes

Leaving cash uninvested

Following a settlor's death, trusts often hold significant cash as the estate settles. Extended cash positions are technically a breach — cash earns below-inflation returns, violating UPIA's requirement to seek appropriate risk-adjusted returns. Establish an investment policy within the first 90 days and begin implementing it promptly.

Continuing to hold the settlor's existing portfolio without review

Many successor trustees inherit a portfolio and leave it unchanged, assuming the settlor's choices were sound. The trustee's duty is to evaluate the portfolio as if it were a fresh investment decision. What the settlor held is a starting point, not a mandate. Document your review and the reasoning for any positions you retain.

Optimizing for income at the expense of growth

As noted above, tilting to income to satisfy a current beneficiary's requests — without a documented impartiality analysis — is the most common investment breach. The income beneficiary will often ask for higher distributions; you are not required to optimize the portfolio around that request.

Hiring a commission-based advisor

A broker who earns commissions on investment products recommended to the trust creates a conflict of interest that the trustee is responsible for. If a commission-based advisor's recommendations are unsuitable, you — the trustee — are liable for following them. Fee-only advisors charge transparent fees with no product commission, which eliminates this second-order liability exposure.

Delegating and forgetting

UPIA permits delegation but requires ongoing monitoring.¹ "My advisor handles it" is not a defense. Annual performance reviews, a written record of those reviews, and documented authority to replace the advisor are all part of a proper delegation structure.

How a fee-only advisor helps

Writing and implementing a trust IPS is not a one-time project — it is an ongoing fiduciary process. A fee-only advisor working alongside you as trustee provides:

• A written IPS tailored to your trust's specific beneficiary structure, time horizon, and distribution requirements — with the documented analysis that UPIA requires
• Investment management within the IPS framework, with an auditable record of every significant decision
• Annual review and documentation — the paper trail courts examine in surcharge actions
• Tax-aware investment decisions — coordination with the trust's CPA on distribution modeling, asset location, and capital gains timing
• No commission conflict — the fee structure eliminates the second-order liability issue that commission-based advisors create for trustees who follow their recommendations

For a trust holding $500K–$5M, engaging a fee-only advisor to handle the investment management component typically costs less annually than the potential surcharge exposure from a single undocumented investment decision.

Sources

1. Uniform Prudent Investor Act — Uniform Law Commission (1994). Requires prudent investor standard, diversification, total-return approach, cost control, and documented delegation. Adopted in nearly all states.
2. Uniform Principal and Income Act — Uniform Law Commission. Provides trustees the "power to adjust" between income and principal to achieve impartiality; authorizes unitrust conversions in many states.
3. IRC § 643 — Definitions Applicable to Subparts A, B, C, and D. Governs Distributable Net Income (DNI); capital gains allocable to corpus generally excluded from DNI and taxed at trust level.
4. IRS Rev. Proc. 2025-32 — 2026 Inflation Adjustments. 2026 trust income tax brackets; top 37% rate applies to trust taxable income above $16,000.
5. American College of Trust and Estate Counsel (ACTEC). Professional organization for fiduciary attorneys; commentary on UPIA implementation, trustee investment duties, and IPS best practices.

Investment policy requirements are governed by the trust document, state UPIA enactment (which may vary), and applicable federal law. This guide reflects general principles applicable in most UPIA states. Verify state-specific requirements with a local estate attorney. Values verified as of April 2026.