US section 877A exit tax: covered-expatriate thresholds and gain calculation

The question of when a US citizen or long-term resident ceases to be a US person for tax purposes is rarely a matter of simple renunciation. Section 877A of the Internal Revenue Code, enacted by the Heroes Earnings Assistance and Relief Tax Act of 2008, imposes an exit tax on any individual classified as a “covered expatriate.” For high-net-worth principals and their advisors, the critical thresholds — a net worth above USD 2 million on the date of expatriation, an average annual net income tax liability exceeding a specified amount (indexed for inflation, standing at USD 201,000 for 2025 as of the publication of this article), or a failure to certify compliance with all federal tax obligations for the five years preceding expatriation — determine liability. The consequence of triggering covered-expatriate status is a deemed sale of all worldwide assets at fair market value, with gains above an exclusion amount (USD 866,000 for 2025 as of the publication of this article) taxed immediately. This mechanism is not a penalty; it is a tax on unrealised appreciation that the US Treasury collects before the individual leaves its jurisdiction. For a principal with a concentrated portfolio of closely held stock, a family office holding appreciated real estate, or carried-interest positions in private funds, the calculation of “net gain” under Section 877A can produce a tax bill in the millions before the passport is returned. Understanding the precise statutory triggers and the mechanics of gain computation is the difference between a planned exit and a forced liquidation. ## The covered-expatriate triggers: three statutory paths Section 877A(g)(1) defines a covered expatriate as any individual who relinquishes US citizenship or ceases to be a lawful permanent resident and meets one of three conditions. The first is a net worth test: the individual’s net worth on the date of expatriation exceeds USD 2 million. This is a balance-sheet test, not an income test, and includes assets held jointly with a spouse, assets held in irrevocable trusts where the individual retains a beneficial interest, and assets held through entities treated as disregarded for US tax purposes. The second is a tax liability test: the individual’s average annual net income tax liability for the five years ending before the date of expatriation exceeds a threshold indexed for inflation — USD 201,000 for 2025 as of the publication of this article. This average is calculated by summing the net tax liability for each of the five tax years and dividing by five, using the tax liability as shown on the return after credits but before estimated tax payments. The third is a compliance certification test: the individual fails to certify under penalty of perjury that they have complied with all US federal tax obligations for the five years preceding expatriation. This third prong is often the most insidious, as a single unfiled Form 5471 for a controlled foreign corporation or an unreported foreign financial account can render the certification false, triggering covered-expatriate status even if net worth and tax liability are below the thresholds. ### Net worth calculation and the role of spousal attribution Net worth under Section 877A includes the fair market value of all assets, less liabilities, determined on the exact date of expatriation. For a married individual domiciled in a community-property state such as California or Texas, the attribution rules are particularly consequential: the entire value of community property is treated as owned by the expatriating spouse, even if the non-expatriating spouse retains US citizenship. Trust interests present another layer of complexity. A beneficiary of a foreign grantor trust with a vested right to corpus or income must include the actuarial value of that interest in net worth. The IRS has not issued formal guidance on discounting for lack of marketability or minority interest in closely held entities for this purpose, meaning the valuation methodology adopted on Form 8854 (the expatriation statement) must be defensible under general appraisal standards. A principal holding a 30 percent interest in a family investment partnership valued at USD 8 million would include USD 2.4 million as a net-worth component, not a discounted figure, unless a contemporaneous appraisal supports a lower value. ### Average annual net income tax liability: the five-year lookback The five-year lookback period for the tax liability test is the five tax years ending before the date of expatriation. For an individual expatriating in 2025, the lookback covers tax years 2020 through 2024. The net income tax liability for each year is the amount shown on the return after all credits, including the foreign tax credit and the general business credit, but before estimated tax payments or withholding. A year with a net operating loss carryback that reduces liability to zero is counted as zero for that year, not as a negative figure. The inflation-adjusted threshold for 2025 is USD 201,000, up from USD 198,000 in 2024, as published in IRS Revenue Procedure 2024-40. For a principal who had a single year of substantial capital gains — for example, USD 5 million in carried-interest realisation in 2021 — the average over five years may exceed the threshold even if the other four years produced modest tax liabilities. A careful multi-year projection before the expatriation date is essential to determine whether a future realisation event within the lookback window can be deferred or accelerated. ## Gain calculation under the deemed sale regime Once an individual is classified as a covered expatriate, Section 877A(a)(1) treats all property of the expatriate as sold on the day before the expatriation date for its fair market value. Gain is recognised to the extent the fair market value exceeds the adjusted basis of the property. Losses are not recognised, except to the extent of gain on property subject to a mark-to-market election. The total gain from the deemed sale is then reduced by an exclusion amount — USD 866,000 for 2025 as of the publication of this article — indexed for inflation from the 2008 base of USD 600,000. This exclusion is applied on a per-expatriate basis, not per return, so a married couple who both expatriate may each claim the exclusion. The exclusion is not a deduction against specific assets; it is applied against the aggregate net gain after offsetting losses within the same asset class. ### Deferred compensation and specified tax-deferred accounts Section 877A(d) carves out special rules for deferred compensation items and interests in nongrantor trusts. For eligible deferred compensation plans — including qualified retirement plans under Section 401(a), Section 403(b) annuities, and traditional IRAs — the expatriate is treated as receiving a distribution equal to the present value of the accrued benefit on the day before expatriation. The distribution is subject to the early-withdrawal penalty under Section 72(t) if the expatriate is under age 59½, unless an exception applies. For ineligible deferred compensation items — such as nonqualified stock options, restricted stock units, or deferred bonus arrangements — the expatriate must either enter into a waiver of treaty benefits with the IRS or post a bond equal to 125 percent of the estimated tax due. The practical effect is that a principal holding unvested equity awards in a US corporation must either accelerate vesting before expatriation or negotiate a complex tax-collection agreement with the IRS. ### Interest in nongrantor trusts and the electing trust regime A covered expatriate who is a beneficiary of a nongrantor trust must treat their interest as sold on the day before expatriation, with gain calculated as the fair market value of the interest less the adjusted basis. The IRS has not issued regulations defining how to determine the fair market value of a discretionary trust interest, creating significant valuation uncertainty. Section 877A(g)(4) allows the expatriate to elect to defer the tax on the trust interest by agreeing to treat the trust as a US trust and to be subject to US tax on future distributions. This election is irrevocable and requires the trust to appoint a US trustee and to file annual US income tax returns. For a family office that administers a multi-generational trust, this election effectively prevents the trust from migrating offshore, defeating a primary objective of the expatriation. ## Exceptions and the rare path to non-covered status Section 877A(g)(1)(B) provides two exceptions to covered-expatriate status. The first applies to individuals who were born with dual citizenship, who hold the citizenship of the other country at the time of expatriation, who have not been a US resident for more than 10 of the 15 years ending on the date of expatriation, and who certify compliance with all federal tax obligations for the five preceding years. The second exception applies to individuals under age 18½ on the date of expatriation. These exceptions are narrow and require strict factual compliance. A dual-citizen principal who has lived in the US for 12 of the past 15 years does not qualify, regardless of the reason for the extended residence. The certification requirement for the dual-citizen exception is identical to the compliance certification for the third prong of covered-expatriate status, meaning any unfiled return or unreported account disqualifies the exception. ### The substantial presence trap for long-term residents For long-term residents — defined under Section 877(e)(2) as individuals who have held a green card for at least 8 of the 15 years ending on the date of expatriation — the covered-expatriate analysis applies identically to that for US citizens. A long-term resident who has been a US tax resident for 10 years but holds a green card for only 7 of those years is not a long-term resident for this purpose. The date of expatriation for a long-term resident is the date the green card is surrendered or revoked, or the date a residency-adjustment election under Section 7701(b) takes effect. The IRS has taken the position in Chief Counsel Advice 2010-010 that a long-term resident who fails to file Form 8854 within the required timeframe remains subject to the exit tax regime indefinitely, even after surrendering the green card. ## Composite case study: the concentrated portfolio principal Consider a principal, age 52, a US citizen by birth who has lived in New York for 25 years. She holds a single class A share in a privately held technology company valued at USD 40 million with an adjusted basis of USD 2 million. She also holds a USD 5 million portfolio of publicly traded equities with a basis of USD 3 million, a Manhattan cooperative apartment valued at USD 4 million with a basis of USD 1.5 million, and a USD 1.5 million interest in a family discretionary trust. Her average annual net income tax liability for the five years ending in 2024 was USD 180,000, below the USD 201,000 threshold. Her net worth on the date of expatriation is USD 50.5 million, well above the USD 2 million threshold, making her a covered expatriate. Under the deemed sale, her gain is calculated as follows: the private company share generates USD 38 million in gain, the public equities generate USD 2 million, the apartment generates USD 2.5 million, and the trust interest — valued at USD 1.5 million with a basis of zero — generates USD 1.5 million. Total gain before exclusion is USD 44 million. After the USD 866,000 exclusion, the taxable gain is USD 43.134 million. At the top long-term capital gains rate of 20 percent plus the 3.8 percent net investment income tax, the federal tax liability is approximately USD 10.3 million. State tax may apply if the state of residence imposes a mark-to-market regime or an exit tax of its own, as California does under Revenue and Taxation Code Section 17951.5 for former residents. ### The role of the net investment income tax and state-level exposure The net investment income tax under Section 1411 applies to the deemed sale gain because the gain is treated as net investment income. For a covered expatriate who is also subject to the alternative minimum tax, the interaction between the AMT and the deemed sale can produce a marginal rate above 30 percent. State-level exposure is jurisdiction-specific: California imposes a mark-to-market exit tax on former residents under Revenue and Taxation Code Section 17951.5, effective for tax years beginning on or after January 1, 2023. New York does not have a similar regime, but it may assert residency for a period after expatriation if the principal maintains a permanent place of abode in the state. A pre-expatriation move to a state without an income tax, such as Florida or Texas, may reduce state-level exposure, but the move must be bona fide and sustained for at least 183 days before the expatriation date. ## Five actionable planning steps for advisors and principals The planning window for a covered-expatriate analysis is measured in years, not months, because the five-year lookback for the tax liability test and the five-year compliance certification period create irreversible trajectories. - Model net worth and average annual tax liability for the five years ending on the projected expatriation date, using actual return data and projected asset values, to determine whether covered-expatriate status can be avoided or must be planned for. - Consider a pre-expatriation gift programme under Section 2501 to reduce net worth below USD 2 million, but note that gifts to a US citizen spouse are not subject to gift tax while gifts to a non-citizen spouse are limited to the annual exclusion amount indexed for inflation (USD 190,000 for 2025 as of the publication of this article). - Evaluate the feasibility of an election under Section 877A(h) to defer the tax on closely held stock by agreeing to treat the stock as sold and to pay tax on future distributions, recognising that this election requires the principal to remain subject to US tax on that asset indefinitely. - File Form 8854 within the required timeframe — the due date of the tax return for the year of expatriation, including extensions — to avoid the automatic application of covered-expatriate status under the compliance certification prong. - Engage a qualified appraiser to value closely held business interests, trust interests, and hard-to-value assets at least 12 months before the planned expatriation date to establish a defensible basis for the deemed sale calculation and to avoid a later IRS challenge under Section 877A(g)(3). ## Sources - Internal Revenue Code Section 877A (26 U.S.C. § 877A), as amended by the Heroes Earnings Assistance and Relief Tax Act of 2008, Pub. L. No. 110-245 - IRS Revenue Procedure 2024-40 (2024-51 I.R.B. 1), providing inflation-adjusted amounts for 2025 - IRS Form 8854, Initial and Annual Expatriation Statement, and accompanying instructions (2024 revision) - California Revenue and Taxation Code Section 17951.5 (AB 2511, enacted 2022, effective 2023) - IRS Chief Counsel Advice 2010-010 (January 8, 2010), addressing long-term resident expatriation timing - Treasury Regulation § 1.877A-1 through § 1.877A-10 (proposed and final), governing exit tax computation and elections