Capital Gains: U.S. vs. Colombia

Why capital gains rules don't talk to each other

The gap between U.S. and Colombian capital-gains rules is wider than almost any other piece of cross-border tax law a U.S. expatriate will face in Latin America. There is no U.S.–Colombia income-tax treaty: nothing harmonizes definitions, nothing re-sources income, and nothing forces either tax authority to recognize what the other has done. Two parallel statutes run side by side, each with its own holding period, its own rate scale, its own exclusions, and its own concept of what a "basis" even is. For a U.S. citizen who has moved to Bogotá, Medellín, or Cartagena and continues to hold a U.S. brokerage account, the practical result is that every single sale must be analyzed twice — once under IRC §1(h) and once under Estatuto Tributario Art. 314 — and the answers rarely match.

This article walks through the seven structural divergences that matter most: the holding-period mismatch, the absence of a step-up at residency, the FX phantom-gain problem, the U.S.-only preferences (QSBS, §1031, §121, the §1091 wash sale, §1061 carried interest), the Colombian-only preferences (the two-year rule itself, the limited Art. 311-1 residence exemption), the stranding of foreign tax credits, and the pre-residency planning window that closes the day a U.S. citizen becomes a Colombian tax resident. The single most actionable rule — what we call the "month 25" rule — is introduced in section 3.

The fundamental holding-period mismatch

The starting point is the holding period — and the two systems disagree by a full year. The United States, under IRC §1222, treats a capital asset as long-term when held for more than 12 months. Long-term gain is then taxed at the preferential 0/15/20% rates of IRC §1(h), with an additional 3.8% Net Investment Income Tax under IRC §1411 kicking in above modified AGI thresholds of $200,000 (single) or $250,000 (married filing jointly) — thresholds that have not been indexed for inflation since 2013.

Colombia uses a different cutoff entirely. To qualify as ganancia ocasional — the favored category equivalent to long-term capital gain — a fixed asset must have been held for more than two years under ET Arts. 300 and 311. Anything sold at 24 months or less is folded into ordinary income, taxed on the progressive scale of ET Art. 241, which reaches 39% on the top bracket. When the two-year threshold is met, ET Art. 314 applies a flat 15%.

The "month 14" trap and the "month 25" planning rule

The most consequential consequence of the holding-period mismatch is a band of dates — roughly months 13 through 24 — where U.S. and Colombian classifications point in opposite directions. A stock sold at month 14 has been held for more than one year, so for U.S. purposes it is long-term: the maximum federal tax is 15% (or 20% in the top bracket, plus 3.8% NIIT). But for Colombia, 14 months is short of the two-year line. The gain is ordinary, taxed on the Art. 241 scale up to 39%. The U.S. investor who congratulated himself for "waiting out the year" has saved nothing in Bogotá.

The fix is mechanical: hold to month 25. At 25 months, both jurisdictions agree the gain is preferential. The U.S. side stays at 15%/20%, and Colombia drops from up to 39% ordinary to 15% ganancia ocasional. For an investor sitting on a meaningful unrealized gain, the spread between selling at month 14 versus month 25 can easily exceed the cost of waiting an extra eleven months in market exposure. We call this the "month 25" rule because it is the single most actionable timing instruction in the entire U.S.–Colombia overlap, and it costs nothing to follow: a calendar reminder and a brokerage trade ticket.

No basis step-up at residency

U.S. tax law famously offers a step-up in basis at death under IRC §1014. Colombian law offers no equivalent — not at death, and crucially, not at the moment a person becomes a Colombian tax resident. ET Art. 69 anchors the cost basis of an asset to its historical peso cost, computed at acquisition. There is no "fresh start" valuation as of the day a new tax resident steps off the plane.

For foreign-currency assets — which describes virtually every U.S. brokerage holding owned by an American expatriate — ET Art. 288, introduced by Ley 1819 de 2016, supplies the translation mechanic. The acquisition price is converted to pesos at the TRM (Tasa Representativa del Mercado, the official daily exchange rate published by the Superintendencia Financiera) on the acquisition date. The disposition price is converted at the TRM on the disposition date. The Colombian gain is the difference between those two peso amounts — capturing both the underlying USD appreciation and any USD/COP movement in the intervening years.

That second component is where the trouble starts. Because the Colombian peso has depreciated against the dollar over most multi-year horizons, the TRM on the disposition date is almost always higher than the TRM on the acquisition date. A U.S. security that simply held its dollar value would still register a peso gain — and Colombia taxes it.

The FX phantom-gain problem

Consider a U.S. citizen who buys 1,000 shares of an S&P 500 ETF on January 15, 2015 at $200 per share — total cost $200,000 USD. The 2015 average TRM was roughly COP 2,750/USD, so under ET Art. 288 his Colombian peso cost basis is locked at COP 550,000,000. He becomes a Colombian tax resident in 2024. On June 1, 2026, he sells at $400 per share — total proceeds $400,000 USD. The TRM on the sale date is approximately COP 4,000/USD, so his peso disposition value is COP 1,600,000,000.

The two tax bills look like this:

• U.S. tax: $200,000 long-term capital gain. Assuming the top bracket, 20% + 3.8% NIIT = 23.8%, roughly $47,600.
• Colombian tax: COP 1,050,000,000 of ganancia ocasional (assuming the holding period exceeded 2 years). At the 15% Art. 314 rate, roughly COP 157,500,000, which at the disposition-date TRM is approximately $39,375 USD.

Decompose the Colombian gain. The "real" USD appreciation, translated at the disposition TRM, is roughly COP 800M (the $200K of dollar gain × COP 4,000). The remainder — about COP 250M of peso gain attributable purely to TRM movement on the original $200K of principal, plus an additional layer of FX-related drift — is currency translation, not economic profit. (Under a more aggressive decomposition that compares dollar-for-dollar peso movement on principal alone, the FX-only share rises to roughly COP 637M.) Whichever decomposition you prefer, the result is the same: a meaningful slice of the 15% Colombian tax is being paid on currency movement rather than on real gain. The investor is paying tax on the depreciation of the peso against the dollar — an economic event over which he had no control and from which he derived no income.

U.S. preferences Colombia ignores: QSBS, §1031, §121, wash sales

Several of the most valuable provisions of U.S. capital-gains law have no Colombian analog. From the perspective of a Colombian-resident U.S. citizen, every dollar excluded from U.S. tax under one of these provisions is still fully taxed in Colombia.

§1202 Qualified Small Business Stock

IRC §1202 permits a U.S. shareholder of qualifying C-corporation stock — held for more than five years — to exclude up to 100% of the federal gain on disposition, capped at $15 million per issuer (indexed beginning after 2026). The 2025 expansion enacted into law layered on partial exclusions for QSBS acquired after July 4, 2025: 50% after three years, 75% after four years, 100% after five. None of this matters to the DIAN. Colombia does not recognize §1202, taxes the gain in full, and applies either the 15% ganancia ocasional rate (if held more than two years) or ordinary rates up to 39% (if held less). A founder selling $10 million of QSBS at month 60 of holding will pay $0 to the IRS and roughly $1.5 million to Colombia.

§1031 like-kind exchanges

Post-TCJA, IRC §1031 is limited to U.S. real property — but for qualifying exchanges it permits indefinite tax deferral. Colombia does not recognize the concept. A U.S. taxpayer who rolls a Miami rental into a Houston rental under §1031 has deferred U.S. tax, but if he is a Colombian resident at the time of the exchange, the disposition of the Miami property is a fully taxable Colombian event.

§121 primary-residence exclusion

IRC §121 allows a U.S. taxpayer to exclude $250,000 (single) or $500,000 (MFJ) of gain on the sale of a principal residence owned and used for at least two of the last five years. Colombia has its own narrower regime — ET Art. 311-1 exempts the first 5,000 UVT of gain on the residence-of-habitation, conditional on (i) deposit of proceeds in an AFC (Cuenta de Ahorro para el Fomento de la Construcción), (ii) more than two years of possession, and (iii) a dwelling whose declared value does not exceed 15,000 UVT. For 2026 with UVT at COP 49,799, 5,000 UVT is roughly COP 249 million, or about USD $62,000 at a 4,000 TRM — far below the U.S. §121 cap, and gated by conditions that most expatriates' residences fail.

§1091 wash sales and §1061 carried interest

IRC §1091 disallows a loss on the sale of a security if a substantially identical security is repurchased within 30 days. Colombia has no wash-sale analog — but the asymmetry cuts only one way. A Colombian resident cannot harvest a Colombian loss while sidestepping the U.S. wash-sale rule, because §1091 still applies on the U.S. side. The IRC §1061 three-year recharacterization for carried interest also has no Colombian equivalent: a Colombian-resident fund manager has either a two-year gain (ganancia ocasional, 15%) or a sub-two-year gain (ordinary, up to 39%) — the U.S. three-year line is invisible.

Colombian preferences the U.S. ignores

The asymmetry runs the other way too, but the menu is much shorter. Colombian law does offer three concepts the United States does not:

• The two-year holding period itself. For an asset held between 12 and 24 months, Colombia treats the gain as ordinary while the United States gives long-term treatment. Past 24 months, the Colombian flat 15% is often better than the U.S. 20% + 3.8% NIIT in the top bracket — meaning a long-held position can be cheaper to sell from Colombia than from the United States.
• The Art. 311-1 residence-of-habitation exemption. Limited as it is, the 5,000 UVT carve-out plus the AFC mechanism can shelter a meaningful slice of a modest home sale that would not qualify for §121 if the U.S. taxpayer fails the two-of-five-year residency test.
• The 1% notary retención. Real estate sales in Colombia carry an automatic 1% withholding at the notary on the sale price. It is not a separate tax — it is a credit against the final capital-gains liability — but it does not exist in U.S. real-estate transactions, which rely on FIRPTA and information reporting instead.

FTC stranding on U.S.-source gains

A U.S. citizen who is a Colombian tax resident files both a U.S. 1040 (worldwide income, citizenship-based) and a Colombian declaración de renta (worldwide income, residence-based). To prevent double taxation, the taxpayer claims a foreign tax credit on Form 1116 for Colombian tax paid. The mechanic generally works — but it breaks for one specific and very common case: gain on U.S.-source assets.

Under IRC §865, gain from the sale of personal property — including U.S.-listed stock — is sourced to the residence of the seller. For a Colombian tax resident, that means Colombian-source. So far so good. But the rule has a critical override for U.S. citizens: §865(g) excepts U.S. citizens from the residence-based sourcing rule unless a treaty re-sources the income, leaving the gain U.S.-source on the U.S. return. There is no U.S.–Colombia treaty, so §§865(h) and 904(d)(6) treaty re-sourcing is unavailable.

The result is that on the U.S. return, the gain is U.S.-source. The Colombian tax sits in the passive basket on Form 1116 looking for U.S. tax on foreign-source passive income to offset — and finds none, because the same gain was just sourced to the United States. The credit goes to the ten-year carryforward and, in the typical investor's facts, expires unused. The investor pays both taxes: full U.S. tax on the U.S.-source gain and full Colombian tax on the Colombian-resident gain. Mitigation is limited to (a) re-characterizing the gain in years when there is enough other foreign-source passive income to absorb the credit or (b) restructuring the asset itself so that the gain accrues to a non-U.S. entity in a treaty jurisdiction — a project well beyond the scope of a 1040.

Worked example: Maria's $500K portfolio

Maria is a U.S. citizen who moved from Miami to Bogotá in 2018 and crossed the 183-day Colombian residency threshold that year. She holds 2,500 shares of a single U.S.-listed ETF, bought in January 2016 at $100 per share — total cost $250,000, with a 2016 TRM of approximately COP 3,050/USD, giving a Colombian peso basis of COP 762.5 million. In May 2026, she sells all 2,500 shares at $200 — proceeds $500,000, TRM approximately 4,000, peso proceeds COP 2,000 million.

• U.S. gain: $250,000 long-term capital gain. Top bracket: 20% federal + 3.8% NIIT = 23.8%, or roughly $59,500. If Maria's taxable income places her in the 15% bracket (below the $533,400 breakpoint), the rate drops to 15% + 3.8% = 18.8%, or $47,000.
• Colombian gain: COP 1,237.5 million of ganancia ocasional. At 15%, that is COP 185.6 million, or roughly USD $46,400 at the disposition-date TRM.
• FTC outcome: The $46,400 of Colombian tax sits in the passive basket on Form 1116. The $250,000 U.S. gain is U.S.-source under §865(g), so there is no foreign-source passive income to offset on the U.S. return. Absent other foreign-source passive income, Maria's Colombian credit carries forward — and unless she earns enough foreign-source passive income within ten years to absorb it, the full $46,400 expires.
• Effective combined burden: ~$59,500 (U.S.) + ~$46,400 (Colombia) ≈ $105,900 on a $250,000 economic gain — a 42% effective rate.

If Maria had sold the same shares in 2017 — before her Colombian residency began — her total tax would have been the U.S. liability alone, roughly $59,500, and she would have rebought the position at a fresh basis. The $46,400 of Colombian tax is, in a real economic sense, the price of having held appreciated U.S. stock across the residency line without resetting basis first.

Pre-residency planning playbook

If there is one paragraph in this article to internalize, it is this one. Every dollar of appreciation that accrues on a U.S.-denominated asset before a U.S. citizen becomes a Colombian tax resident is permanently outside the Colombian system. Every dollar that accrues after is inside it. The single highest-value action in U.S.–Colombia capital-gains planning is to realize appreciated gains before crossing the 183-day Colombian residency threshold under ET Art. 10, and then — if the investor wants to maintain the same market exposure — to rebuy the position immediately at the new, higher U.S. basis.

A few mechanics. First, the sale must be effected before residency commences — meaning before the 183rd day of physical presence in any rolling 365-day window, counting carefully across calendar years. Second, the rebuy is optional but typically desirable for taxpayers who want to remain invested. Third, the sale-and-rebuy resets U.S. basis under IRC §1012 and Colombian basis under ET Arts. 69 and 288 simultaneously — locking in the disposition-date TRM as the Colombian peso cost. Fourth, the timing has to be airtight: pre-residency means pre-residency. A sale in March followed by a residency commencement on July 1 is fine; a sale on July 5 with a residency-start date of July 1 is not.

Action checklist

For Colombian-resident U.S. citizens with appreciated U.S. brokerage positions or U.S. real estate, the playbook reduces to a small number of repeatable rules.

1. Before residency: Realize gains. Pay U.S. tax once. Rebuy if desired. Document the disposition-date TRM and retain brokerage statements.
2. After residency, before selling anything: Count 25 months from the acquisition date. If you are inside that window, the Colombian tax cost will dominate any U.S. long-term saving.
3. Track TRM at every transaction: Acquisition TRM, disposition TRM, and intermediate corporate-action TRMs (splits, dividends in kind) must all be documented for ET Art. 288 purposes.
4. Forget §1202, §1031, and §121 on the Colombian side: Plan around the assumption that none of these exclusions exist for Colombia. Where possible, complete §121 sales and §1031 exchanges before residency.
5. Don't double-count FTCs: Map every gain to its source under §865 before assuming the Colombian tax will be creditable. U.S.-source gain on U.S.-listed stock typically strands the Colombian credit absent unrelated foreign-source passive income.
6. Watch the 5-year QSBS clock: If you hold §1202 stock and are considering Colombian residency, model the cost of selling the QSBS while still U.S.-domiciled versus deferring and paying full Colombian tax on the gain later.
7. For real estate: Coordinate the 1% Colombian notary retención with U.S. FIRPTA and reporting. A Colombian property sale is a Colombian-source gain, and the Colombian tax is creditable on Form 1116 — but only in the passive basket.

None of this is exotic. Almost all of it is calendar work: count the months, mark the TRM, time the sale. The U.S.–Colombia capital-gains overlap rewards patience and punishes haste, and the difference between a $47,000 tax bill and a $106,000 tax bill on the same economic gain is almost always a matter of which side of the residency line — and which side of month 25 — the trade falls on.