IRS Proposes Strict Investment Guardrails for ‘Trump Accounts,’ Focusing on Low-Fee Index Funds and Long-Term Growth

WASHINGTON — In a major regulatory step that will shape the financial futures of millions of American children, the Internal Revenue Service (IRS) and the U.S. Department of the Treasury released proposed regulations on Thursday outlining how investments must be managed within the newly established "Trump accounts."

According to the regulatory text (CC-00349938-26), investments during the formative "growth period" of these accounts will be strictly limited to low-fee stock index mutual funds and exchange-traded funds (ETFs). Treasury officials emphasize that the rules are engineered to maximize long-term compound growth by aggressively suppressing investment fees while mandating broad market diversification.

The proposed framework strikes at the heart of modern retail investing, favoring passive index strategies over active management, high-risk securities, or leveraged products. As families and financial institutions prepare for the rollout of these accounts, the rules provide a clear, albeit restrictive, pathway for building generational wealth for the nation’s youth.

Main Facts

The newly proposed IRS regulations establish a rigid framework governing asset allocation, fee caps, and default selections for Trump accounts during their initial accumulation phases.

Core Provisions of the Proposed Rule:

The Growth Period Definition: The restrictive investment period begins the moment an initial account is established for a beneficiary and terminates on December 31 of the calendar year in which the beneficiary turns 17. Once the beneficiary enters adulthood, these specific investment limitations sunset.
Eligible Asset Classes: Investments are strictly confined to mutual funds and ETFs that track a broad equity index of primarily U.S. companies—such as the benchmark S&P 500.
Leverage Prohibition: Funds utilizing leverage, derivatives for speculative purposes, or complex synthetic structures are strictly barred from the accounts during the growth phase.
The 0.1% Expense Cap: Annual fund fees and operating expenses are capped at a maximum of 0.1% (10 basis points) of the fund’s total balance. However, this cap does not extend to broader trustee administration fees.
Default Investment Vehicles: The Treasury previously designated the State Street SPDR Portfolio S&P 500 ETF (ticker: SPYM) as the initial default investment. Four additional low-cost index ETFs have been greenlit as alternative choices for parents and account administrators.
Effective Date: The regulations are slated to apply to tax years beginning on or after January 1, 2026. The IRS has opened a public comment period running through October 20.

Chronology

The pathway to these proposed regulations has moved swiftly through the federal rulemaking apparatus, reflecting an intense legislative and administrative push to operationalize the accounts.

Legislative Genesis: The foundation of the Trump account was laid with the passage of H.R. 1, Public Law 119-21—commonly referred to in policy circles as the OBBBA (Omnibus Budget and Tax Bill). This legislation amended the Internal Revenue Code by adding Section 530A, creating a novel class of individual retirement accounts tailored for eligible children.
The Pilot Program and Eligibility Window: Under complementary provisions in Section 6434, a federally funded pilot program was authorized to inject a $1,000 initial seed contribution into accounts for eligible children born after December 31, 2024, and before January 1, 2029. To qualify, a child must possess a valid Social Security number and remain under the age of 18 at the close of the calendar year in which the account is opened.
Notice 2025-68: Ahead of Thursday’s formal rulemaking, the Treasury Department and the IRS issued Notice 2025-68 in early 2026, soliciting public and industry feedback on how best to structure the investment guidelines for these accounts.
The March 2026 Disclosure: In spring 2026, the Treasury officially previewed the investment framework, highlighting the State Street SPDR Portfolio S&P 500 ETF (SPYM) as the primary default option alongside four complementary low-cost index products.
Current Action (Thursday): The IRS formally published the comprehensive proposed regulations (CC-00349938-26) in the Federal Register, setting an October 20 deadline for public comments ahead of the formal 2026 tax-year implementation.

Supporting Data and Investment Framework

To understand the fiscal gravity of the IRS’s 0.1% expense cap, one must examine the mathematics of long-term investing. Over a 17-year growth period—from birth to age 17—even seemingly minor differences in fee structures can compound into thousands of dollars in lost or saved capital.

The Mathematics of Low-Fee Investing

Financial economists have long demonstrated that high expense ratios are an invisible drag on portfolio performance. By enforcing a strict 0.1% ceiling on fund-level operating expenses, the Treasury ensures that virtually all earnings remain within the compounding engine of the account rather than leaking out to asset managers.

+-------------------------------------------------------------------------+
|                  TRUMP ACCOUNT INVESTMENT PARAMETERS                    |
+----------------------------------+--------------------------------------+
| Parameter                        | Regulatory Standard                  |
+----------------------------------+--------------------------------------+
| Eligible Index Types             | Broad U.S. Equity (e.g., S&P 500)    |
| Maximum Expense Ratio            | 0.10% (Fund-level fees only)         |
| Permitted Leverage               | None (Strictly unleveraged equities) |
| Growth Period Duration           | Birth through age 17 calendar year   |
| Default Vehicle (Initial)        | State Street SPDR Portfolio S&P 500  |
+----------------------------------+--------------------------------------+

Default Mechanics and Trustee Responsibilities

The regulations establish a clear protocol for account allocation if parents or legal guardians remain passive. Under the framework:

Parental Selection: Responsible parties may choose from a pre-approved roster of ultra-low-cost index ETFs that meet the 0.1% fee ceiling and track major domestic benchmarks.
Default Allocation: If a beneficiary’s guardian fails to make an active investment election, the trustee is legally mandated to automatically allocate the funds into an eligible, low-cost default investment—such as the designated S&P 500 ETF.
Trustee Fee Distinction: While the fund management fees are legally capped at 0.1%, trustees are permitted to charge separate administrative fees for maintaining the account infrastructure. However, consumer advocates anticipate that competition among financial institutions will keep these trustee charges modest.

Official Responses

The release of the proposed regulations has elicited reactions from fiscal conservatives, financial advisors, and child advocacy groups alike.

A Treasury Department spokesperson defended the stringent guardrails, noting that the rules are designed to protect novice or disengaged savers from the predatory fees often associated with actively managed mutual funds. "When dealing with the financial futures of America’s children, predictability, safety, and cost-efficiency must be paramount," the spokesperson said in a statement accompanying the release. "By restricting investments to broad-market, low-fee index funds during the crucial growth years, we are ensuring that hard-earned capital is working for the child, not being siphoned away by Wall Street management fees."

Industry groups, while generally supportive of the goal of broad diversification, have raised technical questions regarding the interplay between the 0.1% fund fee cap and institutional custody charges. Representatives from several major brokerage firms noted that while index funds tracking the S&P 500 easily clear the 0.1% hurdle—with many commercial ETFs charging as little as 0.03%—the operational burden of tracking millions of federally seeded accounts will require streamlined digital infrastructure.

Academic economists have praised the reliance on S&P 500 tracking funds, citing historical data showing that passive large-cap U.S. equity indexing consistently outperforms the vast majority of active retail stock-picking strategies over multi-decade horizons.

Implications

The implementation of Trump accounts, backed by these rigorous investment standards, carries profound implications for American household balance sheets, the asset management industry, and the broader capital markets.

1. Democratization of Wealth Building

For lower- and middle-income families who may lack formal financial literacy training, the default integration of low-cost S&P 500 funds provides institutional-grade investing tools automatically. By removing the temptation to chase speculative assets, meme stocks, or high-fee thematic funds during the child’s minority years, the government is effectively steering the next generation into proven, time-tested wealth accumulation vehicles.

2. Market Inflows into Passive Indexing

The mandatory routing of billions of dollars—seeded by the federal $1,000 pilot grants and supplemented by family contributions—into a select basket of low-fee index ETFs will create a steady, predictable stream of capital flowing into major U.S. corporations. Because the rules favor funds tracking broad domestic indices, mega-cap U.S. equities will see continuous, automated inflows regardless of macroeconomic volatility.

3. Compliance and Operational Shifts for Custodians

Financial institutions offering Trump accounts must rapidly adapt their onboarding and trading platforms to comply with the 0.1% expense cap and the rigid eligibility checklists. Software systems must be programmed to automatically lift these investment restrictions on December 31 of the year the beneficiary turns 17, transitioning the account into an unrestricted adult retirement vehicle.

4. Public Participation and Feedback

With the IRS establishing an October 20 comment deadline, stakeholders ranging from fintech startups to major asset managers and consumer advocacy groups have a narrow window to lobby for technical adjustments. Issues surrounding trustee fee transparency and the exact definition of "primarily U.S. companies" are expected to draw heavy scrutiny during the comment period.

As 2026 approaches, the Trump account framework stands out as one of the most ambitious federal interventions in retail savings history. By wedding government-backed seed capital with strict, low-cost passive index mandates, the federal government is attempting to engineer a durable foundation for youth asset-building that could alter the retirement landscape for decades to come.

To comment on this article or to suggest an idea for future coverage, contact Martha Waggoner at [email protected].