Introduction Tax specialists for US and UK advisers who guide clients through the renunciation of US citizenship understand one fundamental rule: every planning action that can reduce the exit tax exposure must be completed before the renunciation date. Once the renunciation is complete, the Section 877A exit tax is fixed — based on the fair […]
Tax specialists for US and UK advisers who guide clients through the renunciation of US citizenship understand one fundamental rule: every planning action that can reduce the exit tax exposure must be completed before the renunciation date. Once the renunciation is complete, the Section 877A exit tax is fixed — based on the fair market value of all worldwide assets on the day before the expatriation date. No planning action after that date can reduce the liability.
This guide presents the pre-renunciation planning checklist for US citizens in the UK who are seriously considering renunciation in 2026 — covering the exit tax calculation, the five-year compliance certification, the Roth conversion window, the pre-renunciation gifting strategy, Section 2801 planning for US-citizen beneficiaries, and the UK CGT interaction with the Section 877A deemed disposal. Visit our advisory service:
https://www.jungletax.co.uk/services/us-uk-tax/
An advisor who is knowledgeable about Section 877 is a tax professional for the US and the UK in the context of renunciation. A framework for exit taxes that includes the covered expatriate and mark-to-market considered disposal tests, the $866,000 exclusion for 2026, the deferred tax account rule, and who also understands the UK CGT consequences of the Section 877A deemed disposal for a UK-resident renouncer. The Section 877A deemed disposal is a US tax event—but for a UK resident, the same deemed disposal may also trigger UK CGT—a specialist model that both the US exit tax and the UK CGT are set before the renunciation date.
The IRS guidance on expatriation and the exit tax is at:
https://www.irs.gov/individuals/international-taxpayers/expatriation-tax
A US attorney can calculate the Section 877A exit tax and prepare Form 8854. They cannot advise on the UK CGT consequences of the same deemed disposal — or on whether the renunciation date should be timed to minimize the combined US exit tax and UK CGT. The deferred compensation standards, the covered expatriate tests, and the Section 877A calculation are all outside the purview of a UK adviser. Only a tax specialist for the US and UK models can present the full combined picture before the renunciation date is set.
On the day before the expatriation date, all global assets are subject to a considered disposition under Section 877A exit tax. The total net gain across all assets is reduced by the exclusion amount—$866,000 for 2026 —which is indexed annually for inflation. Only the net gain above the exclusion amount is subject to the exit tax. For an HNW individual with a large estate, the exclusion provides only partial relief — but careful pre-renunciation asset selection can maximize the value of the exclusion by aligning it against the highest-rate gain positions.
Form 8854 requires the renouncing individual to certify that they have complied with all US federal tax obligations for the five taxable years before expatriation. A US citizen who has unfiled returns or FBARs for any of those five years cannot make this certification — and becomes a covered expatriate automatically, triggering the exit tax regardless of whether they meet the net worth or average tax liability tests. A tax specialist for the US and UK confirms the five-year compliance position before any renunciation date is set — and completes any required Streamlined submission before the renunciation is executed.
Our guide to renouncing US citizenship and the exit tax is at:
https://www.jungletax.co.uk/jungle-tax-news-updates/us-uk-tax-accountants-renouncing-citizenship/
For a UK-resident US citizen, the Section 877A deemed disposal is a US tax event — but it may also trigger UK CGT on the same deemed gain. The UK treats the deemed disposal as a disposal for CGT purposes if the renouncer is a UK resident at the date of expatriation. The renunciation date can be timed — before or after the UK tax year end — to affect the UK CGT position in the year of expatriation. A tax specialist for US and UK models, the UK CGT position, and the US exit tax before the renunciation date is confirmed.
The first step is a full exit tax calculation — listing every asset in the worldwide estate, applying the fair market value as of the planned renunciation date, calculating the gain on each asset (fair market value minus adjusted basis), and totaling the net gain across all assets. The total net gain is reduced by the Section 877A exclusion ($866,000 for 2026). The exit tax at a 20 percent long-term rate (or ordinary income rates for short-term positions) is calculated on the remaining net gain.
The covered expatriate assessment confirms whether the renouncer meets any of the three covered expatriate tests: net worth of $2 million or more, average annual net US tax above $190,000 for 2026, or failure to certify five years of compliance. Most HNW US citizens in the UK meet the net worth test, making them covered expatriates subject to the exit tax.
The adviser reviews the five years of US federal returns and FBARs immediately before the planned renunciation year. Any unfiled return or FBAR for those five years prevents certification of Form 8854. Where unfiled years exist, the adviser prepares and files the Streamlined submission — resolving the historical non-compliance — before the renunciation date is set. The Streamlined submission and its acceptance must be confirmed before Form 8854 is filed.
A traditional IRA or 401(k) balance is excluded from the Section 877A deemed disposal. Still, post-renunciation distributions from those accounts are subject to a flat 30 percent withholding as non-resident aliens. Converting the traditional IRA or 401(k) to a Roth IRA before renunciation converts the deferred tax account into an after-tax account — eliminating the post-renunciation withholding exposure on those funds. The conversion is taxable in the United States as ordinary income in the year of conversion. The tax specialist for the US and the UK calculates the optimal conversion amount. This amount can be converted at the lowest marginal rate without triggering an unnecessarily higher bracket.
Gifts made before the expatriation date are not subject to Section 2801 — the US tax imposed on US-citizen recipients of gifts from covered expatriates. A US citizen who plans to leave assets to US-citizen children or grandchildren can make pre-renunciation gifts to those beneficiaries — thereby removing the assets from the exit-tax estate and the Section 2801 regime entirely. Pre-renunciation gifts are subject to the standard US gift tax rules — annual exclusion ($18,000 per donee) and lifetime exemption — but are not subject to the Section 2801 levy that applies to post-renunciation gifts from covered expatriates.
Every non-US fund held by the renouncing individual is a PFIC — subject to the Section 877A deemed disposal at fair market value. For PFIC positions held under the mark-to-market election, the deemed disposal produces a gain calculated using the most recent mark-to-market basis — not the original acquisition cost. For PFIC positions that have been held under the excess distribution method without any election, the deemed disposal triggers the exit tax at the applicable rate. The tax specialist for the US and UK reviews every PFIC position before the renunciation date to confirm the deemed disposal calculation and identify any restructuring that could reduce the exit tax on those positions.
The UK CGT position in the year of renunciation depends on when the renunciation takes place relative to the UK tax year end (5 April). A renunciation before 5 April falls in the current UK tax year — any UK CGT on the deemed disposal is due in the current tax year. A renunciation after 6 April falls in the next UK tax year — the UK CGT is deferred by one year. For a renouncer with other significant UK CGT in the current year, deferring the renunciation beyond 5 April may spread the combined CGT liability across two UK tax years — potentially keeping the gain below higher-rate thresholds in each year.
The IRS Form 8854 guidance is at:
https://www.irs.gov/forms-pubs/about-form-8854
Margaret is a US citizen. She has been a UK resident for twenty-four years. She is a retired doctor. Her worldwide assets: London flat £1.8 million (purchased for £420,000 in 2002), UK investment portfolio £680,000 (cost basis approximately £310,000), US brokerage account $520,000 (cost basis approximately $180,000), and a traditional IRA $290,000. She has three adult children — two hold UK citizenship, one holds dual US-UK citizenship. She is seriously considering renouncing US citizenship.
Section 877A deemed disposal: London flat — gain £1,380,000 (approximately $1,753,000 at current exchange rate). UK investment portfolio — gain £370,000 (approximately $470,000). US brokerage account — gain $340,000. Total net gain: approximately $2,563,000. Less Section 877A exclusion ($866,000) = taxable exit tax gain of approximately $1,697,000. Exit tax at 20 percent = approximately $339,400. IRA: excluded from exit tax — but post-renunciation distributions subject to flat 30 percent withholding.
Jungle Tax implemented the following pre-renunciation planning actions.
First, a Roth conversion of $145,000 from the traditional IRA was completed at the 22 percent US marginal tax rate. The UK income tax on the same conversion (treated as foreign pension income in the UK) generated FTC that offset the US federal tax, making the conversion near-cost-neutral. The remaining IRA balance of $145,000 will be subject to 30 percent post-renunciation withholding — approximately $43,500 upon full distribution. The Roth conversion saved approximately $43,500 in post-renunciation withholding on the converted amount.
Second, Margaret gifted £150,000 to each of her three children — £450,000 total — before the renunciation date. The gifts were completed as pre-renunciation PETs — subject to UK IHT taper relief if Margaret survives for fourteen years, and entirely outside Section 2801. The gifts reduced the UK investment portfolio from £680,000 to £230,000 — reducing the exit tax gain on the portfolio from approximately $470,000 to approximately $152,000.
Third, the renunciation was timed for April 2026 — after 6 April — deferring the UK CGT on the deemed disposal into the 2026/27 UK tax year. Margaret’s other UK CGT in 2025/26 was approximately £28,000 — keeping the combined UK CGT across both years at manageable levels.
After the pre-renunciation planning actions, the revised exit tax net gain was approximately $2,045,000 — reduced from $2,563,000 by the portfolio gifting. Less the Section 877A exclusion ($866,000) = taxable exit tax gain of approximately $1,179,000. Exit tax at 20 percent = approximately $235,800 — a saving of approximately $103,600 compared to the unplanned position. The Roth conversion saved approximately $43,500 in post-renunciation withholding—total planning saving: approximately $147,100.
The five-year compliance certification on Form 8854 is mandatory. A US citizen with unfiled returns or FBARs for any of the five years before renunciation becomes a covered expatriate automatically — regardless of net worth. The compliance review must be completed — and any Streamlined submission filed and accepted — before the renunciation date is set.
Post-renunciation distributions from a traditional IRA are subject to flat 30 percent withholding — regardless of treaty rates. Pre-renunciation Roth conversions eliminate this withholding on the converted amount. The tax specialist for the US and UK calculates the optimal conversion amount before any renunciation date is confirmed.
Post-renunciation gifts from a covered expatriate to US-citizen beneficiaries attract Section 2801 tax at 40 percent — payable by the recipient. Pre-renunciation gifts to those same beneficiaries are entirely outside Section 2801. The gifting program must be completed before the expatriation date — it cannot be structured retrospectively.
The UK CGT position in the year of renunciation depends on whether the renunciation falls before or after 6 April. A renouncer with significant UK CGT in the current year may reduce their combined CGT liability by timing the renunciation after 6 April — spreading the exit tax deemed disposal gain across two UK tax years. The tax specialist for the US and UK models the UK CGT timing before any renunciation date is confirmed.
The HMRC guidance on CGT for non-residents is at:
https://www.gov.uk/capital-gains-tax/overview
Jungle Tax is a specialist US-UK cross-border tax advisory firm with tax specialists in the US and UK, including IRS Enrolled Agents and UK-qualified tax practitioners experienced in pre-renunciation planning for US citizens in the UK. We calculate the exit tax liability before any renunciation date is set. We review the five-year compliance position and complete any required Streamlined submission before the renunciation is executed. We model the Roth conversion, pre-renunciation gifting, PFIC restructuring, and UK CGT timing — identifying every action that reduces the combined exit tax and post-renunciation withholding exposure.
Read our guide to renouncing US citizenship and the exit tax:
https://www.jungletax.co.uk/jungle-tax-news-updates/us-uk-tax-accountants-renouncing-citizenship/
Pre-renunciation planning requires a tax specialist in the US and the UK who reviews every item on the checklist before the renunciation date is set, because every action that can reduce exit tax exposure must be completed before the clock starts.
Three points matter most. First, the five-year compliance certification is mandatory — unfiled returns or FBARs for any of the five years before renunciation create automatic covered expatriate status. Second, Roth conversions before renunciation eliminate post-renunciation withholding on IRA distributions — one of the highest-value planning actions available. Third, pre-renunciation gifts to US-citizen beneficiaries are outside Section 2801 — post-renunciation gifts are not.
Jungle Tax | mailto:hello@jungletax.co.uk | 0333-8807974 | https://www.jungletax.co.uk
Section 877A treats covered expatriates as having sold all worldwide assets the day before renunciation. The net gain above the $866,000 exclusion (2026) is subject to exit tax at applicable capital gains rates.
A US citizen who meets any one of: net worth $2 million+, average annual net US tax above $190,000 for 2026, or failure to certify 5 years of US tax compliance on Form 8854.
Yes, Form 8854 requires certification of 5 years of compliance. Missing returns or FBARs for any of those years automatically make you a covered expatriate. Complete a Streamlined submission first.
Post-renunciation IRA distributions are subject to a flat 30% US withholding tax regardless of treaties. Roth conversions before renunciation eliminate this withholding on converted amounts — qualifying Roth distributions are tax-free.
Section 2801 taxes US-citizen recipients of gifts from covered expatriates at 40%. Gifts made before the renunciation date are outside Section 2801 entirely — complete the gifting program before the expatriation date.
Potentially, for a UK-resident renouncer, the deemed disposal may also be a UK CGT event. Timing the renunciation relative to 6 April can affect the UK CGT position across two tax years. A specialist models both.
