Renunciation or relinquishment: which route applies to you

What is the difference between renouncing and relinquishing US citizenship?

Renouncing is one particular expatriating act: an oath taken in person before a US consular officer abroad. Relinquishing is the wider term for losing citizenship through any expatriating act. The others in the State Department's list include naturalising in another country or serving a foreign government, each counting only if done voluntarily and with intent to give up US nationality.

The State Department's guidance lists seven potentially expatriating acts in section 349(a) of the Immigration and Nationality Act. It administers the first five, the fifth being the renunciation oath at an embassy or consulate; the Department of Homeland Security handles the last two. For someone living in Britain the practical choice is between renouncing at the embassy and asking the State Department to confirm that an earlier act under paragraphs one to four already ended citizenship.

The difference lies in the evidence. A renunciation oath is itself treated by the State Department as an unequivocal statement of intent. An earlier act, such as taking British citizenship, says nothing on its own about what the person intended, so intent has to be shown separately and credibly.

• Obtaining naturalisation in another country on your own application, after the age of eighteen
• Taking an oath or formal declaration of allegiance to another country, after eighteen
• Serving in a foreign armed force at war with the United States, or as an officer in a foreign armed force
• Working for a foreign government after eighteen, where you hold its nationality or swore allegiance
• Formally renouncing before a US diplomatic or consular officer abroad

Does becoming a British citizen end your US citizenship?

Not by itself. Naturalising as British is a potentially expatriating act, but it ends US citizenship only if it was done voluntarily and with the intention of giving up US nationality. The State Department says loss is not automatic, and someone whose request is refused remains a US national with every filing duty that goes with it.

Many Americans who become British have no intention of ceasing to be American. For them the British certificate changes nothing in US law, and they remain US citizens who file a US return each year. This is why the question matters for tax: a person who assumes their citizenship lapsed on naturalisation may have stopped filing years ago on a false premise.

For those who did intend to give up US citizenship at the time, the act alone is still not the end of the matter. The State Department has to be satisfied of both the act and the intent, and it records the outcome on a Certificate of Loss of Nationality. Until that certificate exists, banks, the IRS and the State Department itself treat the person as a US citizen. Our post on accidental Americans in the UK covers the related question of who is a citizen in the first place.

How do you get a Certificate of Loss of Nationality for a past act?

By asking a US embassy or consulate abroad to document the earlier act. The State Department describes a process of reading and acknowledging its information on loss of nationality, two interviews with a consular officer, at least one of them in person, and signing the required forms in person before that officer. The Department in Washington then decides.

The burden sits with the person making the request. The State Department says the requester must credibly establish both that the act took place and that every condition was met, including voluntariness and intent at the time. In practice that means documents dating from the act itself, such as the naturalisation certificate, and an honest account of what was intended then..

If the request is approved, the certificate is issued. The State Department describes that determination as final and irrevocable, subject only to narrow statutory exceptions and to administrative review or appeal. If it is refused, the person remains a US citizen. Our expatriation service can prepare the tax side while the request is under way, since the tax position depends on the outcome.

Which date counts as your expatriation date for US tax?

Not the date of the original act. The IRS treats a citizen as relinquishing citizenship on the earliest of four dates, and for an earlier expatriating act the relevant one is the date a signed statement of voluntary relinquishment is given to the State Department, provided a certificate later confirms it.

The Instructions for Form 8854 (opens the official IRS page in a new tab) list the four dates: renunciation before a US diplomatic or consular officer, if later confirmed by a certificate; the furnishing to the State Department of a signed statement of voluntary relinquishment confirming an expatriating act, again if later confirmed; the date the State Department issues a certificate; and the date a US court cancels a certificate of naturalisation. The IRS expatriation tax (opens the official IRS page in a new tab) page ties the second date expressly to the acts in paragraphs one to four of section 349(a).

The effect is that a person who became British many years ago, but who only now signs and submits the statement, has an expatriation date for tax in the present, not in the year of naturalisation. The years in between are years as a US citizen for tax purposes. That date also fixes the five-year window for the compliance certification and the point at which the final year is split.

• Renunciation: the date of the oath, once a certificate confirms it
• Relinquishment: the date the signed statement reaches the State Department, once confirmed
• Otherwise the date the certificate is issued, or a court cancels naturalisation
• Where more than one applies, the earliest date counts

Do Form 8854 and the covered expatriate tests still apply?

Yes, in full. Someone who relinquishes files the same initial Form 8854 with the return for the year of expatriation as someone who renounces, and faces the same three covered expatriate tests. The route to the certificate changes nothing about what the IRS asks once the expatriation date is fixed.

A person is a covered expatriate if net worth on the expatriation date is $2 million or more, if average annual net income tax for the five prior years exceeds $206,000 for 2025 expatriations, or if they do not certify on Form 8854 that they complied with all federal tax obligations for the five tax years before the expatriation date. The certification test applies whatever the person's wealth. Certain people who were dual citizens from birth, and certain people who expatriate before eighteen and a half, are excused the first two tests but never the certification. Our post on the covered expatriate tests works through each one.

A covered expatriate is treated as selling worldwide property at market value on the day before the expatriation date, with gain above $890,000 taxed for 2025 expatriations. For the year itself, Publication 519 (opens the official IRS page in a new tab) explains the dual-status return: a Form 1040-NR with a statement covering the citizen part of the year, and Form 8854 attached. Our Form 8854 page explains each part of the statement.

Why relinquishment is not a shortcut around US tax

Because the tax date is fixed by the statement and the certificate, not by the old act, and the same five-year certification applies. Relinquishment does not shorten the period that has to be compliant, wipe out past years, or avoid the covered expatriate tests.

Years as a US citizen stay open on the normal rules, and where no return was filed the assessment period has not begun. The State Department also sends approved certificates to the IRS, and it notes that a person found by the Department of Homeland Security to have given up citizenship to avoid US tax may be refused entry to the United States. For most people in the UK the practical sequence is the same as for renunciation: bring the five years into order first, often through the streamlined filing compliance procedures (opens the official IRS page in a new tab), which ask for three years of returns and six years of FBARs, then add any further years the certification needs. Our IRS streamlined filing service handles that stage.

One narrower route exists. The relief procedures for certain former citizens (opens the official IRS page in a new tab) cover people who relinquished after 18 March 2010, never filed as a US citizen or resident, had net worth below $2 million both at expatriation and at submission, and owe total tax under a low ceiling set by the IRS for the year of expatriation and the five before it. Their failures must also have been non-wilful. Our post on renouncing US citizenship from the UK, step by step sets out the alternative sequence.

How might this look for a naturalised Briton in Bristol?

A US citizen working as a nurse in Bristol naturalised as British some years ago and says she meant at the time to give up US citizenship. She has not filed a US return since, on the assumption that the matter was closed. She now applies through the embassy for a certificate based on the naturalisation.

If the request is approved, her expatriation date for tax is the date her signed statement reached the State Department, not the date of her British certificate. The five years before that date are years as a citizen, and Form 8854 asks her to certify that they were compliant. If she never filed as a US person, her net worth is below the limit and her tax for the six years is under the ceiling, the former citizens relief may fit. If not, her years are caught up first, usually on a Form 1040 for each year with UK tax credited, through our individual tax returns work. The wider sequence is in our guide to IRS streamlined filing from the UK, and you can contact US UK Tax Returns to review your own facts.