U.S. Estate Tax + Colombia

The worst stack-up in Latin America

For a U.S. citizen who holds a significant U.S. estate and either becomes a Colombian tax resident or has Colombian-resident heirs, the death-tax exposure is structurally one of the worst in Latin America. Two unrelated tax regimes reach the same economic transfer from opposite ends — the U.S. taxes the decedent's estate under IRC §2001; Colombia taxes the heir's receipt under ganancia ocasional rules in Articles 302 through 310 of the Estatuto Tributario — and the two systems contain no bilateral coordination mechanism whatsoever. There is no estate-tax treaty between the United States and Colombia. The foreign tax credit at IRC §2014 is structurally a poor fit for the Colombian beneficiary tax. Colombia, in turn, will not grant a credit for a U.S. estate tax imposed on a different taxpayer at a different moment in time.

The result is full economic stacking. Estate value that has already borne a 40% federal estate tax can be hit again with a 15% Colombian ganancia ocasional in the heir's hands. And on the lower end — where the U.S. estate sits below the $15M exemption and pays nothing — the Colombian-resident heir still pays the full 15%, with no offsetting U.S. tax to credit against. This article walks through both regimes, the gaps between them, and the limited planning techniques that actually work.

The 2026 U.S. landscape: OBBBA made $15M permanent

The One Big Beautiful Bill Act (OBBBA, P.L. 119-21), signed by the President on July 4, 2025, repealed the scheduled Tax Cuts and Jobs Act sunset that would have cut the unified estate, gift, and generation-skipping transfer (GST) exemption roughly in half on January 1, 2026. Instead of dropping to approximately $7 million, the exemption was reset upward and made permanent.

The 2026 figures are:

• Unified estate, gift, and GST exemption: $15,000,000 per individual, or $30,000,000 per married couple with portability properly elected on a timely Form 706.
• Top federal estate-tax rate: 40% (unchanged) on the taxable estate above the exemption.
• Annual gift-tax exclusion: $19,000 per donee in 2026 (unchanged from 2025). Spouses electing to split gifts under §2513 may combine for $38,000 per donee.
• Annual exclusion for gifts to a non-citizen spouse: $190,000 in 2026 (up from $185,000 in 2025).
• GST exemption: also $15,000,000 in 2026, indexed from the 2025 baseline.

For the 2025 transition year, the exemption was $13,990,000 (and $13,610,000 for 2024 decedents). OBBBA's effect is to make the 2026 figure the new permanent floor, indexed forward, rather than allowing it to revert. For Colombian-resident heirs of U.S. citizens, this is good news only on the U.S. side — it leaves more wealth flowing through to the heir before the Colombian ganancia ocasional grinds against it.

Colombia's ganancia ocasional on heirs

Colombia does not levy an estate tax on the decedent's estate as a separate taxable entity. Instead, the heir, legatee, or donee is the taxpayer, and the receipt is taxed at the flat ganancia-ocasional rate. Under Ley 2277 de 2022, that rate was raised from 10% to 15% effective in fiscal year 2023, where it remains in 2026. The relevant statutory architecture sits in Articles 302 through 310 of the Estatuto Tributario (ET).

The key exemptions are in Article 307 ET:

• First 13,000 UVT of the value of the decedent's primary residence transferred to the surviving spouse or legitimate heirs (approximately COP $680.86 million, or roughly USD $163,000 at 2026 reference values).
• First 6,500 UVT of other immovable property transferred to the same protected class.
• First 3,250 UVT per spouse and per legitimate heir for any other assets received — reduced from 3,490 UVT by Ley 2277/2022.
• For non-legitimary recipients (persons outside the protected class of legítimarios under Civil Code rules), 20% of the value received, capped at 1,625 UVT.

Above those thresholds the flat 15% rate applies on the heir's tax return for the year in which the inheritance is liquidated and adjudicated. Because the tax is beneficiary-side, the Colombian liability follows the heir's residency — a Colombian tax resident pays regardless of where the decedent died, where probate was opened, or where the assets are situated.

The two-jurisdiction stack

Two structural scenarios illustrate the stacking.

Stack 1 — High-net-worth U.S.-citizen decedent, Colombian-resident heir

Consider a U.S.-citizen decedent with a $25 million gross estate. Above the $15M exemption, the federal estate tax is 40% × ($25M − $15M) = $4 million, paid by the estate. Net to the heirs: $21 million. If a Colombian-resident heir receives, say, $7 million of that net distribution, she owes Colombian ganancia ocasional at 15% on the amount above her Article 307 exemption (the 3,250-UVT slice, roughly USD $41,000). That is approximately 15% × ($7,000,000 − $41,000) ≈ $1.044 million in Colombian tax — on top of the U.S. estate tax already borne by the estate. The same dollars have been taxed twice through unrelated regimes.

Stack 2 — U.S.-citizen Colombian resident inheriting from a U.S. relative

Now consider an estate below the U.S. exemption. The decedent leaves $8 million; the U.S. estate tax is $0. There is no portability issue because there is nothing to port. The U.S.-citizen heir is, however, a Colombian tax resident. She owes 15% on her share above her Article 307 exemption. There is no U.S. estate tax to credit against on the Colombian return, and no U.S. income tax on inheritance receipts under IRC §102 — receipts of gifts and bequests are excluded from U.S. gross income. The Colombian tax is therefore a pure economic loss from the family's perspective: it is borne entirely by the Colombian-resident heir, with no offsetting credit anywhere.

No estate-tax treaty: the 16-country list

The United States has bilateral estate-tax (and in some cases gift-tax) treaties with sixteen countries. These treaties typically allocate primary taxing rights between domicile and situs, provide tie-breaker rules, and grant a credit mechanism more generous than the unilateral §2014 framework. Colombia is not among them.

The reason Colombia is absent has less to do with geopolitics than with the asymmetry of the two systems. The United States needs an estate-tax treaty primarily with countries that themselves levy a robust estate or inheritance tax on decedents. Colombia's tax falls on heirs, not on the estate as such, which makes the conventional OECD-model estate-tax treaty an awkward fit. As a result, neither government has ever negotiated one, and the income-tax treaty gap — Colombia has only one in force with Spain — is mirrored on the estate side.

§2014 foreign death tax credit ambiguity

In principle, IRC §2014 allows the executor of a U.S. estate to claim a credit against the federal estate tax for any foreign death taxes paid with respect to property situated within the foreign country. The credit is bounded by two limitations: it cannot exceed the foreign tax actually paid, and it cannot exceed the U.S. tax attributable to the same property.

The structural problem with Colombia is that the ganancia ocasional is not imposed on the decedent's estate. It is imposed on the heir as a separate taxpayer, on the heir's receipt, at a date that may be months or years after death once the sucesión is liquidated and adjudicated. Most U.S. estate-tax practitioners take the conservative view that the ganancia ocasional is therefore not a foreign death tax creditable under §2014, but rather a foreign capital-gains-style levy on the heir. The Internal Revenue Service has not issued guidance addressing the Colombian regime specifically.

Gift-tax mechanics across the border

Gift taxation is similarly uncoordinated. On the U.S. side, gifts in excess of the annual exclusion of $19,000 per donee in 2026 (or $38,000 with spousal split-gift election under §2513) consume lifetime exemption and, above the $15M lifetime amount, trigger U.S. gift tax at the same 40% top rate. Gifts to a non-citizen spouse have a separate annual exclusion of $190,000 in 2026 under §2523(i).

On the Colombian side, the donee — if a Colombian tax resident — is the taxpayer. Article 308 ET treats gifts and similar inter-vivos transfers as ganancia ocasional in the donee's hands, at the same 15% rate, with the same UVT-denominated exemptions discussed above (notably a 1,625 UVT cap for non-legitimary recipients).

The two regimes do not coordinate. The U.S. donor pays U.S. gift tax (if any). The Colombian donee separately pays Colombian ganancia ocasional. Because the taxes fall on different parties, there is no foreign-gift-tax credit on the U.S. side at all. A Colombian donee may, in theory, claim a credit on the Colombian return for foreign tax paid on the same event by the same person — but the U.S. gift tax is paid by the donor, not the donee, so the credit door is closed in practice.

Trust planning collapse

Common U.S. estate-planning vehicles depend on a robust common-law trust regime. Colombia is a civil-law jurisdiction without an integrated equivalent. The Colombian fiducia mercantil exists, but it is structurally narrower than an Anglo-American trust, and Colombian tax authorities (DIAN) generally do not give independent legal recognition to a U.S. revocable living trust. The typical treatment is one of two outcomes:

• Disregard. The U.S. revocable trust is treated as transparent. Assets are attributed to the grantor for Colombian patrimonio (wealth) and income-tax purposes during life, and to the beneficiaries on death.
• Recharacterization as a foreign fundación de interés privado or similar arrangement, with attribution under economic-substance principles.

Irrevocable foreign trusts where the U.S. grantor retains control face heavy U.S. reporting on top of any Colombian-side issues. Form 3520 (Annual Return to Report Transactions with Foreign Trusts and Receipt of Certain Foreign Gifts) and Form 3520-A (Annual Information Return of Foreign Trust with a U.S. Owner) carry penalties of the greater of $10,000 or 35% of contributions or distributions. QPRTs, GRATs, charitable lead trusts and dynasty trusts add complexity without producing any Colombian-side benefit, because Colombia simply looks through the structure to the underlying ownership.

QDOT and the Colombian-citizen spouse

If the surviving spouse is not a U.S. citizen, the unlimited marital deduction at IRC §2056 is denied, and the marital deduction is available only through a Qualified Domestic Trust (QDOT) meeting the requirements of §2056A. A Colombian citizen who does not also hold U.S. citizenship — even one who is a U.S. lawful permanent resident — is a non-citizen spouse for these purposes. The QDOT must have at least one U.S. trustee, must withhold estate tax on principal distributions during the surviving spouse's life, and must comply with continuing security requirements once trust assets exceed a threshold.

For U.S.-citizen decedents with estates approaching or exceeding the $15M exemption, the absence of a QDOT means the marital deduction is lost entirely and the full estate tax is owed at the first death rather than deferred until the second. This is independent of the Colombian ganancia ocasional and stacks with it.

The basis-step-up complication

Among the most consequential mismatches is the treatment of basis. Under IRC §1014, property acquired from a decedent generally takes a basis equal to its fair market value at the date of death. Lifetime appreciation in the decedent's hands is wiped out for U.S. capital-gains purposes; only post-death appreciation is taxed when the heir later sells.

Colombia does not recognize this rule. For Colombian tax purposes, the heir inherits the decedent's costo fiscal — the historical fiscal cost in the decedent's hands, adjusted only by limited indexation. If the Colombian-resident heir subsequently sells the inherited asset, the gain is computed against that historical cost, and a second 15% ganancia ocasional (or ordinary-rate gain, depending on the holding period under Article 300 ET) is imposed on appreciation the United States has already exempted via §1014 and has no intention of ever taxing.

The economic effect is severe. A U.S. brokerage account that the decedent bought for $200,000 and that is worth $2 million on the date of death will pass to a U.S.-only heir at a $2 million basis. The same account in the hands of a Colombian-resident heir carries a $200,000 fiscal cost, exposing the entire $1.8 million of unrealized appreciation to the Colombian 15% on the next sale — a tax of roughly $270,000 that nobody, U.S. or Colombian, would have collected had the heir simply not moved to Colombia.

Worked scenario: the Estate of David

David is a U.S. citizen who dies in 2026 leaving an $8 million taxable estate divided equally between two adult children. One child lives in California; the other has been a Colombian tax resident in Bogotá for the past three years.

• U.S. estate tax on the estate: $8M is below the $15M OBBBA exemption. U.S. estate tax: $0.
• California child: Receives $4 million at a fully stepped-up basis under §1014. California imposes no state inheritance tax. Total tax burden on this child's $4M inheritance: $0.
• Bogotá child: Receives $4 million as a Colombian tax resident. Her Article 307 exemption is approximately 3,250 UVT (≈ USD $41,000). The Colombian ganancia ocasional is roughly 15% × ($4,000,000 − $41,000) ≈ $593,850.

There is no U.S. estate tax to credit against on the Colombian return. There is no U.S. income tax on the inheritance receipt under §102. The Colombian tax of nearly $594,000 is borne entirely by the Bogotá child. Two siblings with identical inheritances and the same parent receive net amounts of $4,000,000 and approximately $3,406,000 — a 14.8% wealth differential created purely by residency.

Planning strategies

Because the stacking is structural, the most effective planning happens before either trigger event. The interventions below are roughly ordered from cleanest to most aggressive.

Beyond pre-residency gifting, useful techniques include:

• Annual exclusion gifts in $19,000 (2026) increments to multiple donees over multiple years, structured to avoid Colombian residency triggers in the recipient.
• Pre-residency asset transfers and Roth conversions to crystallize basis and shift assets out before Colombian residency starts the patrimonio clock.
• Maximize lifetime gifting rather than testamentary bequests where a Colombian-resident heir is already in place. Annual gifts within the donee's Article 308 exemption pile up faster than a single lump-sum bequest can be sheltered.
• Selective Colombian-residency rupture. Where an inheritance is imminent — for instance, an elderly parent's terminal diagnosis — the heir may consider careful management of the rolling 183-of-365-day residency calculation to break Colombian tax residency before the estate is adjudicated. This requires planning around DIAN's anti-abuse posture and the spouse-and-minor-children attribution rules at Article 10 ET.
• QDOT for non-citizen spouses when the estate approaches $15M, to defer the U.S. estate tax to the second death.
• Structured bequests over outright bequests in limited cases. Although Colombia generally looks through trusts, an irrevocable structure with U.S.-side accumulation can sometimes delay the moment of beneficiary-side recognition. Pair with full Form 3520/3520-A compliance.

None of these techniques eliminates the stacking entirely. They reduce it. For families with significant U.S. wealth and Colombian-resident members, the planning question is not whether the second tax will apply — it usually will — but how much of the estate can be moved before it does, and whether the heir's residency posture can be managed at the right moment.