Trust Taxation and Act 60: A 2026 Regulatory Perspective

How federal grantor trust rules, House Bill 505, and the OBBBA reshape trust planning for Puerto Rico investors.

By Hans Riefkohl, Riefkohl Law • March 2026 • Part 8 of 12 in the Puerto Rico Trust Law Series

The legal and fiscal architecture of trust taxation within the jurisdiction of Puerto Rico represents one of the most complex intersections of civil law and federal taxation in the United States. For the Individual Resident Investor (IRI) operating under the Incentives Code, commonly known as Act 60, the year 2026 has introduced a series of critical legislative recalibrations that fundamentally alter the strategic utility of trust structures. As the United States federal government transitions into the permanent tax regime established by the One Big Beautiful Bill Act (OBBBA) and Puerto Rico implements the pivotal reforms of House Bill 505, the traditional “zero-tax” paradigm is being replaced by a more nuanced “low-tax” framework characterized by heightened compliance, transparency, and reporting obligations.

The historical tension between the concept of the trust as a “patrimonio autónomo” (autonomous estate) under Puerto Rico civil law and the “transparent” nature of grantor trusts under federal income tax law continues to define the landscape. Understanding this paradox is the prerequisite for any sophisticated Act 60 planning strategy. A trust may be perfectly valid and sovereign under the Civil Code of Puerto Rico, possessing its own legal personality and rights, while simultaneously being treated as a non-entity for federal tax purposes, with all income, deductions, and credits attributed directly to the grantor. This divergence necessitates a three-layer analysis—residency, trust classification, and income sourcing—all of which must align to secure the intended fiscal benefits.

The Historical and Jurisprudential Foundations of Trust Sovereignty

The genesis of modern trust taxation can be traced to the early 20th-century conflict between the burgeoning federal income tax and the strategies of high-net-worth families seeking to shift income burdens to low-bracket beneficiaries. In the decades following the 1913 enactment of the modern income tax, grantors frequently utilized short-term trusts to retain control over assets while nominally shifting the tax liability to lower-bracket relatives. This era of fiscal ambiguity was resolved through judicial intervention, most notably in the 1940 Supreme Court decision in Helvering v. Clifford. The Court established that where a grantor retains “dominion and control” over the trust property, the grantor remains the real owner for tax purposes, regardless of the trust’s legal validity under state law. This principle was extended in 1941 by Helvering v. Stuart, which determined that income used to discharge the grantor’s legal obligations, such as child support, remained taxable to the grantor personally.

These judicial doctrines provided the blueprint for the eventual codification of the grantor trust rules in the Internal Revenue Code (IRC) of 1954, specifically Sections 671 through 679. In Puerto Rico, the local judiciary and the Department of the Treasury (Hacienda) explicitly adopted these federal principles. The seminal 1957 decision in Álvarez v. Secretario de Hacienda confirmed that Puerto Rico applies federal grantor trust doctrine in determining tax ownership, thereby importing the Clifford factors into the island’s tax jurisprudence. This adoption was further refined in Boscio v. Secretario de Hacienda (1962), where the Puerto Rico Supreme Court applied a multi-factor analysis to distinguish between accumulated income, which may be taxed at the trust level, and income used for the benefit of the settlor, which triggers attribution.

Evolution of Judicial Precedents in Puerto Rico Trust Jurisprudence

This jurisprudential history underscores that the validity of a trust under Puerto Rico’s civil code is a separate inquiry from its tax classification. While a trust may provide robust asset protection and succession benefits under the local code, its ability to insulate income from federal or local taxation is strictly governed by the grantor trust rules. As progressive tax brackets compressed in the late 20th century, the planning focus shifted from “income-shifting” between individuals to “income-location” between jurisdictions. Act 60 planning represents the culmination of this shift, where the strategic placement of assets in a PR trust aims to capitalize on Puerto Rico’s unique tax incentives.

The Federal Grantor Trust Framework: IRC Sections 671–679

At the heart of the current taxation model lies the distinction between grantor and non-grantor trusts. Under IRC § 671, where it is specified that the grantor or another person is treated as the owner of any portion of a trust, the taxable income, deductions, and credits of the trust are included in the owner’s individual computation. No items are included solely on the grounds of dominion and control under general gross income definitions; they must specifically trigger one of the subpart E sections.

Statutory Triggers and the Clifford Factors

The Internal Revenue Code identifies several specific powers and interests that will cause a trust to be classified as a grantor trust. These triggers are binary: if even a single provision is met, the trust (or the applicable portion thereof) is transparent for tax purposes.

Reversionary Interest (§ 673): A trust is a grantor trust if the grantor retains a reversionary interest in either the corpus or the income, and the value of that interest exceeds 5% of the value of such portion of the trust as of the inception of the trust. For an Act 60 investor, a trust designed to return assets to the grantor after a short duration will fail Layer 2 of the analysis.

Power to Control Beneficial Enjoyment (§ 674): This is one of the most frequently encountered triggers. If the grantor, or a non-adverse party, has the power to dispose of the beneficial enjoyment of the corpus or income without the consent of an adverse party, grantor status is triggered. An “adverse party” is defined as a person having a substantial beneficial interest in the trust which would be adversely affected by the exercise or non-exercise of the power.

Administrative Powers (§ 675): This section prohibits certain “powers of administration” that would allow the grantor to use trust assets for personal benefit. Prohibited powers include the ability to purchase trust assets for less than adequate consideration, the power to borrow from the trust without adequate interest or security, and specific powers to vote or direct investments in a fiduciary capacity.

Power to Revoke (§ 676): If the grantor holds the power to revest title to the trust property in themselves, the trust is transparent. This is the standard classification for revocable living trusts.

Income for the Benefit of the Grantor (§ 677): Grantor status applies if income, without the approval or consent of any adverse party, is or may be distributed to the grantor or the grantor’s spouse, held or accumulated for future distribution to them, or applied to the payment of premiums on life insurance policies on the life of the grantor or spouse.

Person Other Than Grantor Treated as Substantial Owner (§ 678): A person other than the grantor (such as a beneficiary) will be treated as the owner of any portion of a trust if they have a power exercisable solely by themselves to vest the corpus or the income in themselves.

Foreign Trusts with U.S. Beneficiaries (§ 679): This section is particularly critical for Puerto Rico structures. It provides that a U.S. person who transfers property to a foreign trust is treated as the owner of the portion of the trust attributable to such property if for such year there is a U.S. beneficiary of any portion of the trust. Because many Puerto Rico trusts are classified as “foreign” for federal purposes, § 679 acts as a catch-all that can inadvertently pull a PR trust into the grantor trust regime.

The Non-Grantor Pivot for Act 60 Investors

For an Act 60 investor, the primary objective is often the creation of a “non-grantor” trust. A non-grantor trust is a separate taxable entity. It computes its own income tax liability and is entitled to its own deductions. Income accumulated within the trust is taxed at the trust’s marginal rates, while income distributed to beneficiaries “flows through” and is taxed at the beneficiary’s individual rates. The trust receives a deduction for the distributed amount up to its “distributable net income” (DNI). This creates the potential for a sophisticated multi-layer strategy: income can be accumulated in a PR trust at favorable local rates or distributed to PR-resident beneficiaries who can then apply their own Act 60 exemptions to the PR-source portion of that income.

Layered Analysis: The Framework for Act 60 Alignment

The successful implementation of a Puerto Rico trust strategy requires the simultaneous satisfaction of three independent legal frameworks. If any single layer fails, the trust structure may become an expensive compliance burden without providing the sought-after tax relief.

Layer 1: Bona Fide Residency (IRC § 937)

The threshold layer is the residency of the investor. Act 60 benefits are contingent upon the individual being a “bona fide resident” of Puerto Rico. Under IRC § 933, income derived from sources within Puerto Rico by a bona fide resident is excluded from U.S. federal gross income. The IRS tests bona fide residency using the rigorous three-part standard established in § 937.

Failure to satisfy any one of these tests results in the investor being treated as a standard U.S. citizen or resident, making them liable for federal income tax on their worldwide income, regardless of the trust structure.

Layer 2: Trust Classification

Once residency is established, the trust must be analyzed under the grantor trust rules discussed previously. If the trust is a grantor trust, the “layer” fails to provide an additional tax shield. The income is attributed to the resident investor, who must then report it on their individual PR and U.S. filings. If the trust is a non-grantor trust, it enters a separate tax regime, enabling the use of the 65-day rule and separate entity deductions.

Layer 3: PR-Source Income (IRC §§ 861–865)

The final layer is the character of the income earned by the trust. Act 60 benefits apply exclusively to “Puerto Rico-source” income. The sourcing rules of the federal IRC are used to make this determination. Generally, rental income is sourced by the location of the property; business income by the place of performance or operation; and interest and dividends by the residence of the payor. Capital gains from the sale of securities are generally sourced to the residence of the seller (the trust or the beneficiary), making them PR-source if the seller is a bona fide PR resident. However, if the trust holds U.S. real estate or dividends from U.S. corporations, that income is U.S.-source and remains subject to federal taxation at standard rates.

The 2026 Recalibration: House Bill 505 and the 4% Regime

The most significant event in the 2026 tax year for Puerto Rico investors is the enactment of House Bill 505 (HB 505). This legislation was designed to move Puerto Rico’s incentive program from a politically precarious “zero-tax” positioning to a more sustainable, permanent “low-tax” framework. HB 505 effectively bifurcates the IRI program into two regimes based on the date of application.

The 0% Grandfathered Regime vs. the 4% Permanent Regime

Individuals who submitted their Act 60 decree applications on or before December 31, 2026, are generally grandfathered into the traditional benefits of the program. These investors enjoy a 0% tax rate on PR-source interest and dividends, as well as a 0% tax rate on capital gains accrued and realized after establishing PR residency. This grandfathering is contractual, providing the stability necessary for long-term trust planning.

Starting January 1, 2027, new applicants will be subject to the recalibrated “4% Regime”. Under this framework, interest, dividends, and post-relocation capital gains will be subject to a fixed 4% Puerto Rico income tax rate. While this is a departure from the zero-tax era, the 4% rate remains significantly lower than mainland capital gains and ordinary income rates, preserving the island’s competitive edge while improving revenue predictability for the Puerto Rico Treasury.

Program Extension and Residency Tightening

To balance the introduction of the 4% tax, HB 505 significantly extended the lifespan of the incentive program. The sunset date for Act 60 was moved from December 31, 2035, to December 31, 2055. This 30-year planning horizon is a critical boon for trust and estate fiduciaries, as it allows for multi-generational wealth modeling with a high degree of statutory certainty.

Simultaneously, the legislation introduced a stricter “prior residency” requirement. For applications filed on or after January 1, 2027, an applicant must demonstrate that they have not been a resident of Puerto Rico for at least six years immediately preceding their relocation. This change ensures that the program attracts new capital rather than allowing current residents to re-index their tax status.

The Federal Landscape: The One Big Beautiful Bill Act (OBBBA)

While Puerto Rico was refining its local code, the United States federal government enacted the One Big Beautiful Bill Act (OBBBA), signed into law on July 4, 2025. This legislation made permanent many of the temporary provisions of the 2017 Tax Cuts and Jobs Act (TCJA) and introduced new structural changes to the federal tax code that directly impact trusts and high-net-worth investors.

Permanent Increase in the Estate and Gift Tax Exemption

The most significant change for estate planners was the elimination of the 2026 “sunset” provision for the unified estate and gift tax exemption. Prior to the OBBBA, the historically high exemption was scheduled to drop from approximately $14 million to $7 million in 2026. The OBBBA permanently increased the exemption to $15 million per individual (or $30 million for married couples) starting January 1, 2026, with annual inflation indexing thereafter.

This change removes the “use it or lose it” urgency that dominated the tax planning environment of 2024 and 2025. However, it also emphasizes the importance of trust classification. Assets held in a grantor trust are included in the grantor’s gross estate at death under IRC §§ 2031–2046, while assets in a properly structured non-grantor trust (such as an Irrevocable Life Insurance Trust or a multi-generational trust) may be excluded, providing for significant long-term wealth transfer efficiency.

The Quadrupled SALT Deduction Cap

The OBBBA retroactively increased the itemized deduction cap for State and Local Taxes (SALT) from $10,000 to $40,000 ($20,000 for married filing separately) for the 2025 tax year. This cap rises to $40,400 in 2026 and will increase by 1% annually through 2029 before reverting to $10,000 in 2030. This change has profound implications for Act 60 investors who maintain some U.S.-source income or reside in high-tax states before their move. Furthermore, because each non-grantor trust is entitled to its own SALT deduction, high-net-worth families can “multiply” the SALT benefit by creating multiple non-grantor trusts.

The “2/37ths” Itemized Deduction Haircut

One of the more restrictive provisions of the OBBBA is the reinstatement and modification of the “Pease” limitation on itemized deductions under IRC § 68. Starting in 2026, taxpayers in the highest (37%) marginal bracket must reduce their itemized deductions by 2/37 of the lesser of their total itemized deductions or the excess of their income over the 37% bracket threshold. This effectively caps the tax benefit of itemized deductions at 35 cents per dollar.

Critically, for the first time, this limitation explicitly applies to estates and non-grantor trusts. This creates an indirect reduction in the value of the charitable deduction for trusts under IRC § 642(c). Fiduciaries must now manage trust liquidity more aggressively to account for the resulting income tax liability that many trusts will face starting in 2026.

The Mechanics of Puerto Rico Trust Income Taxation

The statutory framework for trust income taxation in Puerto Rico is governed by the Internal Revenue Code of 2011, as amended. In a major correction to historical documentation, many of the rules previously found in Sections 1161–1171 of the 1994 Code have been moved to the Section 1083 series in the 2011 Code. Specifically, Section 1083.01 establishes that the individual income tax rates apply to the income of estates and trusts, and the tax must be paid by the fiduciary unless the income is distributed to beneficiaries.

The 65-Day Rule: A Strategic Arbitrage Tool

One of the most potent planning mechanisms for PR trusts is the “65-day rule,” codified in PRLISC § 1083.02(d) and IRC § 663(b). This rule allows a trustee to elect to treat distributions made to beneficiaries within the first 65 days of a taxable year (on or before March 6 for a calendar year) as having been made on the last day of the preceding year.

This provides three key strategic benefits:

1. Tax Bracket Leveling: Trust tax brackets are extremely compressed; in 2026, the 37% federal top rate is reached at only $16,001 of income. Distributing income to a beneficiary who has a much higher threshold for the top bracket can result in significant tax savings.

2. Medicare Surtax Management: The 3.8% Net Investment Income Tax (NIIT) applies to trusts with undistributed income over a very low threshold. The 65-day rule allows fiduciaries to “push” this income to beneficiaries to avoid the surtax.

3. Act 60 Timing Optimization: For investors who transition to PR residency mid-year, the 65-day rule can be used to treat distributions made in the new year as occurring in the “year of move,” maximizing the benefit of the decree for that initial transition period.

Charitable Deduction Limits for Trusts

Puerto Rico Regulation 8249 establishes specific limitations on charitable deductions for trusts that diverge from federal law. While federal trusts generally enjoy an “unlimited” deduction for gross income paid to charity under § 642(c), Puerto Rico limits these deductions to 50% of Adjusted Gross Income (AGI). This limitation is particularly relevant for high-wealth PR trusts engaged in significant philanthropic activity. Furthermore, for the deduction to be valid, the contribution must be made to an organization qualified by the Secretary of Treasury that provides services to residents of Puerto Rico.

Foreign Trust Reporting and the Penalty Trap

For a Puerto Rico trust to be treated as a “domestic” trust for federal tax purposes, it must satisfy two tests under IRC § 7701(a)(30):

1. The Court Test: A court within the United States must be able to exercise primary supervision over the administration of the trust.

2. The Control Test: One or more U.S. persons must have the authority to control all substantial decisions of the trust.

Because Puerto Rico is not technically one of the “states” in the geographic sense used in certain sections of the Code, and because its local courts are part of a separate judiciary from the federal district courts for primary supervision purposes, many PR trusts are classified as “foreign” for federal reporting purposes. This classification triggers the requirement to file Form 3520 (Annual Return to Report Transactions with Foreign Trusts) and Form 3520-A (Annual Information Return of Foreign Trust with a U.S. Owner).

Penalty Exposures and Policy Shifts

The penalties for failing to report a foreign trust are some of the most punitive in the international tax regime. Unlike income tax penalties, which are based on a percentage of tax owed, these are information reporting penalties based on the value of the assets or transfers.

A critical development for 2026 is the IRS policy shift toward pre-assessment review. Historically, the IRS used an “assess first, consider reasonable cause later” approach, which led to automated assessments of hundreds of thousands of dollars in penalties. Starting at the end of 2024, the IRS began reviewing reasonable cause statements submitted with late-filed returns before assessing penalties, providing a meaningful opportunity for fiduciaries to mitigate exposure if they can demonstrate that the failure was not due to willful neglect.

Administrative Compliance and Filing Deadlines

The administrative burden for Act 60 IRIs and their trusts has been clarified by Act 65-2025, which streamlined the filing deadlines for various entities to provide greater certainty and consistency.

Unified Trust Filing Timeline

Under the updated Section 1061.09 of the PR Code, revocable and grantor trusts must file their annual informative returns (Form 480.8F) and provide the corresponding informative returns to grantors (Form 480.6F) by the last day of the third month following the close of the taxable year (March 31 for calendar-year trusts). This alignment eliminates the previous reliance on annual circular letters for deadline extensions.

Furthermore, starting in taxable years beginning after December 31, 2024, exempt businesses (including IRIs and their business trusts) must file their exempt business annual reports and pay the corresponding filing fees directly to the Department of Treasury as part of their Puerto Rico income tax return, rather than with the Department of Economic Development and Commerce (DEDC). This change centralizes fiscal oversight and is likely a precursor to more automated data sharing between Puerto Rico and the IRS.

Estate Tax Divergence and Basis Step-Up Paradoxes

A critical second-order insight for Act 60 investors involves the disparate treatment of the “basis” of inherited property. In the United States federal system, property acquired from a decedent generally receives a “step-up” in basis to its fair market value (FMV) as of the date of death under IRC § 1014. This allows heirs to sell inherited assets immediately without realizing capital gains.

Puerto Rico’s Act 76-2017 and the Carryover Basis Rule

Puerto Rico abolished its estate and gift tax for transfers occurring after December 31, 2017. While this provides immediate relief from tax liability at death, it introduced a “carryover basis” regime for Puerto Rico tax purposes. Under Act 76-2017, the tax basis of property acquired by bequest or inheritance is the same basis the property had in the hands of the decedent.

This creates a significant disparity for Act 60 IRIs:

For Federal Tax Purposes, the heirs may receive a step-up to FMV, potentially eliminating U.S. capital gains on the sale.

For Puerto Rico Tax Purposes, the heirs inherit the original basis, potentially creating a large capital gain upon sale.

However, for IRIs with valid decrees, the impact of this PR carryover basis is mitigated by their tax exemptions. If the heir also possesses an Act 60 decree, the gain realized on the sale of the inherited asset may still be 0% (or 4%) exempt, making the basis disparity a non-issue from a cash-outflow perspective. For non-resident heirs, however, this disparity can be catastrophic.

The Estate Informative Return Requirement

Despite the lack of an estate tax, the Puerto Rico Treasury requires the filing of an Informative Return (Model SC 2800 C) within 12 months of the decedent’s death. This return is necessary to obtain the certificate of cancellation of the preferred lien that Puerto Rico maintains over all property within its jurisdiction to ensure the payment of any outstanding personal taxes of the decedent.

Conclusion: Strategic Imperatives for the 2026 IRI

The taxation of trusts in the Puerto Rico-U.S. corridor has matured from a period of aggressive experimentation into a highly regulated framework of compliance and “substance over form.” The enactment of HB 505 and the OBBBA has provided the long-term statutory certainty that fiduciaries have requested for over a decade, but it has done so at the cost of the “zero-tax” headline and simplified reporting.

For the successful Individual Resident Investor in 2026, the following strategic imperatives are paramount:

1. Establish Genuine Presence: Given the GAO’s recommendations for enhanced audit activity, all three IRC §937 bona fide residency tests — the 183-day presence rule, the Tax Home Test, and the Closer Connection Test — must be documented with absolute precision. Trusts should not be used as a “paper shield” for individuals who have not genuinely relocated their lives to the island.

2. Verify Trust Classification: Fiduciaries must perform a “subpart E” audit of all trust instruments to ensure that grantor status is either intentionally chosen for estate planning (such as an IDGT) or strictly avoided for non-grantor DNI planning. The 65-day rule under PRLISC § 1083.02(d) should be standard practice for managing trust-level tax brackets.

3. Comply with Foreign Trust Filings: The safer approach remains treating Puerto Rico trusts as “foreign” for Form 3520 and 3520-A purposes. The potential 35% and 5% penalties far outweigh any administrative savings from non-filing.

4. Integrate Charitable Floor Planning: With the new 0.5% federal charitable floor and the $10,000 mandatory PR charitable donation (plus $5,000 annual report fee), investors should consider bunching strategies or Donor Advised Funds to optimize the after-tax cost of their required philanthropy. Note: at least $5,000 of the donation must go to CECFL-listed organizations focused on eradicating child poverty, and organizations cannot be controlled by the decree holder or family.

The 2026 environment offers a generational opportunity for wealth preservation within a U.S.-protected legal system, but it demands a level of legal and accounting rigor that is commensurate with the substantial tax savings available. The transition to the 4% regime for new applicants marks the institutionalization of Puerto Rico as a sophisticated global wealth destination, shielded by federal law and stabilized by local statutory extensions through 2055.