Missed UK Tax Returns: US Savings Bonds for UK Residents

A UK-resident American who redeems a US Series I or Series EE savings bond has UK taxable savings income in the tax year of redemption, even though the interest built up over many years and the US taxes it on its own timetable. Where those redemptions were never declared, the result is Missed UK tax returns that need correcting with HMRC.

Savings bonds are among the most commonly overlooked assets on a cross-border file. They were often bought decades ago, sit in a US Treasury account rather than with a bank, pay nothing until they are cashed, and generate a single US tax form at the very end. None of that prompts a UK filing. At Jungle Tax we prepare the UK and US returns that bring these holdings back into line, and this guide sets out how each country treats the bonds, where the two systems fail to align, and how a missed UK position is put right.

What are Series I and Series EE savings bonds?

Both are non-marketable registered securities issued by the US Treasury directly to individuals. They cannot be sold on a market; the only way to realise them is to redeem them with the US Treasury.

• Series EE bonds earn a fixed rate set at issue. Electronic EE bonds are issued at face value, and the US Treasury guarantees that an EE bond will be worth at least double its issue price after 20 years. Older paper EE bonds were sold at half their face value and grew towards it.
• Series I bonds earn a composite rate: a fixed rate set at issue plus an inflation rate reset every six months by reference to US consumer prices.
• Both series accrue interest for up to 30 years. Interest is added to the bond's value rather than paid out, so the holder receives nothing until redemption or final maturity.
• Both can generally be redeemed after 12 months, with the last three months of interest forfeited if they are cashed within the first five years.

That last feature, a return that is rolled up and paid in one amount at the end, is what makes the UK analysis more involved than it is for an ordinary bank account.

How does the US tax savings bond interest?

The US federal rules are well documented by the US Treasury's tax information for EE and I bonds and in IRS Publication 550.

• Deferral is the default. A cash-basis individual reports the interest in the year the bond is redeemed or reaches final maturity, whichever comes first.
• Annual reporting is available by election. A holder may instead report each year's increase in value as it accrues. The election applies to all savings bonds held and brings in previously unreported accrued interest in the year it is made. Reverting to deferral requires a change of accounting method.
• Final maturity ends deferral. Once a bond stops earning interest after 30 years, the accumulated interest is taxable in the US for that year whether or not the bond has been cashed.
• No US state or local income tax. The interest is subject to federal income tax only.
• Form 1099-INT is issued once. The form covers the year the interest is paid and shows the lifetime interest on the bond, even where the holder has been reporting annually. It is not issued for each year of accrual.
• Net Investment Income Tax may apply in addition to regular income tax for those above the relevant income thresholds.

A US citizen living in the UK remains subject to all of this. The foreign earned income exclusion does not help, because interest is not earned income.

How does HMRC tax US savings bonds held by a UK resident?

The UK has no concept that matches the US deferral election. A UK resident taxed on the arising basis is charged on worldwide savings income, and the practical question is not whether the uplift on a savings bond is taxable but under which set of rules it falls, and therefore how it is measured and when.

We are candid with clients on this point: HMRC has not published guidance that addresses Series I or Series EE bonds by name. The analysis below is drawn from the legislation and from HMRC's general manuals, and the position on any particular holding needs confirming case by case.

Route one: the deeply discounted securities rules

Part 4 Chapter 8 of ITTOIA 2005 taxes as income the profit on a "deeply discounted security". HMRC's Savings and Investment Manual at SAIM3010 describes these as government securities and commercial bonds where the amount paid on redemption is higher than the issue price, and confirms that the word "security" is given a broad meaning. The test, summarised at SAIM3020, asks whether the amount payable on maturity or any other possible redemption will or may exceed the issue price by more than 0.5% for each year of the redemption period, capped at 15% for securities of 30 years or more.

Where a security is within these rules:

• the charge arises in the tax year in which the security is redeemed or otherwise disposed of, not as value accrues;
• the taxable amount is the sterling value of what is received less the sterling value of what was paid, each translated at the rate on its own date, so currency movement over the holding period is swept into the income figure;
• the profit is taxed as savings income and is outside capital gains tax in practice;
• a loss on a deeply discounted security is not generally allowable against other income.

An old paper EE bond bought at half its face value looks very much like a classic discount instrument, and this route is the natural reading for it.

Route two: interest taxed as foreign savings income

The deeply discounted securities test disregards amounts payable by way of interest when measuring the redemption amount. Electronic EE and I bonds are issued at face value and the growth is described by the issuer as interest. On that reading the uplift is not a discount at all: it is interest that is paid in one sum on redemption, taxable as foreign savings income in the tax year it is received.

On this route the taxable amount is the US dollar interest converted to sterling at the rate when it is paid. The return of the original dollar principal is not income, and currency movement on that principal is not brought into the income computation.

Why the choice of route matters

Both routes produce the same headline answers, and those are the answers that matter most for a catch-up:

• the uplift is income, not capital gain;
• it is taxed in the UK tax year of redemption, not spread over the years of accrual;
• it is savings income, so the starting rate for savings and the personal savings allowance are available where the individual's other income permits, with the balance taxed at the savings rates.

Where the routes differ is the sterling figure and the place it goes on the return. Take an illustrative holding: a bond bought for $10,000 when the exchange rate was $1.55 to the pound and redeemed for $15,400 when the rate was $1.27.

Step	Interest route	Deeply discounted security route
What is measured	Dollar interest of $5,400	Sterling proceeds less sterling cost
Conversion	$5,400 at $1.27	$15,400 at $1.27 less $10,000 at $1.55
UK taxable income	About £4,252	About £5,674
Currency movement on principal	Not in the income figure	Included in the income figure

The same bond, the same dates and the same dollars give two different UK income figures. When sterling has weakened over a long holding period, as it has for many bonds bought in the 2000s and early 2010s, the discount route produces the higher number. A return should be prepared on a reasoned, documented basis and the basis applied consistently across every bond and every year; where the difference is material, the treatment adopted should be explained in the white space of the return.

Two further points of uncertainty

• Inflation-linked I bonds. The legislation excludes certain "excluded indexed securities" from the discount rules, but HMRC's manual indicates that a security guaranteeing the return of the investor's principal does not qualify for that exclusion. An I bond cannot be redeemed for less than was paid for it, so the exclusion appears unlikely to apply, but this is a judgement rather than a published HMRC view.
• Bonds held past final maturity. The US taxes the interest in the year of final maturity whether or not the bond is cashed. An electronic bond is paid out automatically into the holder's US Treasury account at that point, which we would treat as the UK taxable event. A paper bond left in a drawer after it has stopped earning is less clear, and the UK year of charge should be considered on its facts.

US and UK treatment compared

Issue	United States (IRS)	United Kingdom (HMRC)
When taxed	Redemption or final maturity by default; annually if elected	Tax year of redemption; no annual election
Character	Interest income	Savings income, as interest or as profit on a deeply discounted security
Tax year	Calendar year	6 April to 5 April
Currency	US dollars; no currency effect	Sterling; conversion method depends on the route
Sub-national tax	Exempt from state and local income tax	Not applicable
Reporting document	Form 1099-INT in the year of payment	None issued; the taxpayer computes and self-assesses
Where reported	Schedule B and Form 1040	Self Assessment return, foreign pages or additional information pages
Foreign account reporting	Not an FBAR or Form 8938 asset when held at the US Treasury	No separate asset report, but the income is an offshore matter for time limits and penalties

Which country taxes first under the US-UK treaty?

The interest article of the US-UK income tax treaty gives the country of residence the exclusive right to tax interest beneficially owned by its resident. For a UK-resident individual who is not a US citizen, that is the end of the matter: the UK taxes and the US does not.

For a US citizen the treaty's saving clause preserves the right of the US to tax its citizens as if the treaty did not exist. Both countries therefore tax the same redemption. The relief-from-double-taxation article then sets the order:

• the UK is not required to give credit for US tax that is charged only because the individual is a US citizen. Because the treaty would allow the US no tax on this interest in the hands of a non-citizen UK resident, the UK credit is in practice nil;
• the US then gives a foreign tax credit for the UK tax, treating the income as arising in the UK to the extent needed to make that credit work.

The practical result is that UK tax is paid in full and US tax is reduced by credit on the US return, usually claimed on Form 1116 with the treaty re-sourcing position disclosed. A UK return that claims foreign tax credit relief for US tax on savings bond interest is, in most cases involving a US citizen, wrong.

Why is there usually no US tax to credit in the same year?

Even with the order of taxing rights settled, the two systems rarely line up in time. Three mismatches recur on the files we prepare.

• Different tax years. A bond redeemed in February falls in one US calendar year but in the UK tax year that began the previous April. The UK tax on it is due the following 31 January, by which time the US return for the year of redemption may be many months old or not yet due.
• The annual-accrual election. A holder who elected to report interest annually has paid US tax year by year with no UK tax to credit against it, because the UK charges nothing until redemption. In the redemption year the position reverses: there is a substantial UK charge and little or no US tax on the same income. Excess foreign tax credits can generally be carried back one year and forward ten, which may not reach the earlier US years.
• Net Investment Income Tax. The IRS position is that foreign tax credits do not reduce this additional tax. That position has been challenged in the US courts under other treaties, and it remains a point to be considered on each return rather than assumed.

None of this changes the UK reporting obligation. It does mean that the US and UK returns for the redemption year, and sometimes the years either side, need to be prepared together by one team. Our US-UK tax accountants prepare both sides so that the credit is claimed in the right country, in the right year, on the right basis.

Is a savings bond account reportable on the FBAR or Form 8938?

No. The FBAR covers financial accounts located outside the United States, and Form 8938 covers specified foreign financial assets. A savings bond held in an account with the US Treasury, or a paper bond issued by the US government, is a US asset held with a US issuer. It is not reported on either form, however large the holding.

Two cautions follow. First, the UK current account into which redemption proceeds are eventually paid is a foreign account and is reportable in the usual way; the FBAR penalty calculator illustrates what is at stake where those filings have been missed. Second, the absence of any US foreign-asset reporting is one reason savings bonds fall out of sight. Nothing on the US side flags them as a cross-border item.

How do you report a savings bond redemption on the UK Self Assessment return?

Working through a redemption involves the following steps.

1. Identify the UK tax year. Use the redemption date, not the US calendar year shown on the Form 1099-INT.
2. Establish the dollar figures. The issue price and issue date, the redemption value and date, and the interest shown on the Form 1099-INT or the US Treasury account history.
3. Decide and document the characterisation. Interest, or profit on a deeply discounted security, with reasons.
4. Convert to sterling. For interest, at the rate when the interest is paid. For a deeply discounted security, proceeds and cost each at the rate on their own date. HMRC publishes exchange rates that may be used, and the method should be applied consistently.
5. Enter the income. Foreign interest is entered on the foreign pages of the return. HMRC's notes direct profits on deeply discounted securities to the additional information pages. Do not enter the same amount in both places.
6. Do not claim UK credit for US tax on the interest where the holder is a US citizen, for the treaty reasons above.
7. Check the allowances. The personal savings allowance is reduced for higher rate taxpayers and is not available to additional rate taxpayers, so for most of our clients the full amount is taxed at the higher or additional savings rate.

Someone who is not already in Self Assessment must notify HMRC of chargeability by 5 October following the end of the tax year in which the redemption took place. The online filing and payment deadline is the following 31 January.

For earlier years, an individual who validly claimed the remittance basis may have had a different result for redemption proceeds kept outside the UK. That basis was withdrawn for foreign income arising from 6 April 2025 and replaced by a time-limited regime for qualifying new arrivals, so the year of redemption and the basis actually claimed for that year both matter when reconstructing the history.

Redemptions never reported to HMRC: what happens now?

The typical fact pattern is consistent. A bond is cashed, the dollars are paid to a US account, the interest is reported on the US return from the Form 1099-INT, and the individual assumes, reasonably but wrongly, that tax paid to the US settles the matter. Because the UK has primary taxing rights, the UK tax was due in full and remains outstanding.

How far back can HMRC assess?

HMRC's assessing time limits, summarised in its Self Assessment manual at SALF411, run from the end of the tax year concerned:

• 4 years where the taxpayer took reasonable care;
• 6 years where the loss of tax was brought about carelessly;
• 12 years where the lost tax involves an offshore matter, which income from a US-issued security is;
• 20 years where the behaviour was deliberate, and also where tax was lost because the individual failed to notify HMRC that they were chargeable at all.

The last limb is frequently missed. An individual who was never in Self Assessment and never notified chargeability may be exposed to a longer window than someone who filed returns but omitted the bond. Which limit applies is a question of fact and behaviour for each year, and it is established before any figures are submitted.

Does HMRC already know?

It should not be assumed either way. The United States does not participate in the Common Reporting Standard, and information exchange between the two governments on directly held US Treasury securities is narrower than the automatic account reporting HMRC receives from most other countries. That is not a reason to leave the position uncorrected. The obligation exists regardless of whether HMRC holds the data, and a disclosure made before HMRC opens an enquiry is treated as unprompted, which carries materially lower penalties.

Disclosure and penalties in general terms

• Recent years still within the amendment window, broadly 12 months from the filing deadline, are corrected by amending the return.
• Older years involving offshore income are normally disclosed through HMRC's Worldwide Disclosure Facility. After notifying an intention to disclose, the taxpayer has a limited period, currently 90 days, to submit the full computation and offer.
• Interest runs on the unpaid tax from the original due date.
• Penalties are a percentage of the tax, set by behaviour (reasonable care, careless, deliberate, deliberate and concealed), by whether the disclosure was unprompted, and by the quality of the disclosure. The percentages are also scaled by territory; the United States falls in the lowest category.
• Years up to 2015-16 may fall within the separate Failure to Correct regime, under which the penalties are considerably higher than the standard scale unless there is a reasonable excuse.

A full account of our approach to bringing delinquent UK filings up to date is set out on our UK tax services page.

What about the US side of a catch-up?

In most savings bond cases the US reporting is in order because the Form 1099-INT drove it. The US returns still need revisiting once UK tax is paid, because the foreign tax credit for that UK tax was not claimed at the time. Whether a refund claim is open depends on the US limitation periods, which are longer for foreign tax credit claims than for ordinary refund claims.

Where the US filings are themselves incomplete, for example because UK accounts were never reported on an FBAR, the savings bond correction is prepared alongside the wider US catch-up. Our IRS streamlined filing experts handle that work, and our US tax services team prepares the amended returns that carry the credit.

Records to assemble before a return is prepared

• A schedule of every bond: series, serial or confirmation number, issue date, issue price and registered owner.
• Redemption confirmations showing date and amount, and the US Treasury account transaction history.
• Every Form 1099-INT issued for savings bond interest.
• US returns for the redemption years, and for every year in which interest was reported under the annual-accrual election.
• Evidence of UK residence status for each year, including arrival dates and any remittance basis claims.
• UK returns already filed, and any correspondence with HMRC.
• Bank statements showing where the proceeds were paid and whether they were brought to the UK.

Older paper bonds often have incomplete records. The US Treasury can provide redemption histories for registered bonds, and it is better to obtain them than to estimate.

Bringing a savings bond position up to date

US savings bonds are simple instruments with an awkward cross-border profile: taxed late in the US, taxed all at once in the UK, credited in the opposite direction to the one most holders expect, and invisible to every foreign-asset form. Where redemptions have gone unreported, the correction is a matter of careful return preparation: the right year, the right characterisation, the right sterling figure, and a disclosure made before HMRC asks. Jungle Tax prepares both the UK and the US filings for UK-resident Americans in exactly this position. To arrange a confidential consultation, contact our cross-border team.