Inheritance from the USA to the UK: A 2026 Currency Guide

For UK residents inheriting from a US estate, the headline question — “how much US tax will be deducted before I see the money?” — has a simpler answer than most expect: for estates below $15 million per individual or $30 million per married couple in 2026, no federal estate tax is paid.

Above those thresholds, the rate is 40 percent on the excess. The currency leg, however, is rarely simple: US estates typically take 6 to 18 months to settle, during which time GBP/USD volatility can swing the sterling value of the inheritance by 10 percent or more. A forward contract booked at probate grant locks today’s rate for delivery on the expected distribution date.

Who this guide is for

This guide is written for UK residents inheriting from a US estate. Typical readers include British citizens with US-resident family members — parents, siblings, or partners who built lives in California, Florida, New York, Texas, or elsewhere — and UK-US dual citizens, returning expatriates, and beneficiaries of estates including US real estate, IRA or 401(k) balances, or US-listed share portfolios. It covers the US estate process, the UK tax position, and the currency strategy. It is not regulated tax or legal guidance; a US estate attorney and a UK cross-border tax adviser are the right routes for case-specific questions.

Cambridge Currencies operates international payments via our FCA-authorised partners Currencycloud (FRN 900199) and ScioPay (FRN 927951).

How a US estate is taxed in 2026

The US has a federal estate tax, twelve states and the District of Columbia have their own estate or inheritance taxes, and several other taxes can apply during estate administration. The structure is more complex than most UK beneficiaries expect.

Federal estate tax

The 2025 “One Big Beautiful Bill Act” (OBBBA) made the federal estate tax exemption permanent at $15 million per individual (indexed for inflation), or $30 million for a married couple using the portability election. Estates below these thresholds pay no federal estate tax. Above the exemption, the rate is 40 percent on the excess. IRS Form 706 is the federal estate tax return filed by the executor.

State-level estate and inheritance taxes

Twelve states and the District of Columbia levy their own estate tax, with state-specific exemption thresholds typically well below the federal level. Connecticut, Hawaii, Illinois, Maine, Maryland, Massachusetts, Minnesota, New York, Oregon, Rhode Island, Vermont, Washington, and DC are the jurisdictions to check. Maryland and Connecticut also levy state-level inheritance taxes (paid by the beneficiary, not the estate). Six states (Iowa is phasing out, Kentucky, Maryland, Nebraska, New Jersey, Pennsylvania) levy inheritance tax on the beneficiary. The rates are typically 10–20 percent on assets above modest thresholds.

For a UK beneficiary, the relevant state is the state in which the deceased was domiciled at death, not the state where the beneficiary lives. State estate tax is paid by the estate before distribution; state inheritance tax may be paid by the UK beneficiary directly to the relevant state tax authority.

Capital gains step-up

US tax law provides a step-up in cost basis on inherited assets to fair market value at the date of death. This is favourable for the beneficiary: a US-listed share portfolio held by the deceased for 40 years acquires a fresh cost basis at the death-date market value. The beneficiary’s eventual capital gain on sale is measured from that new basis, not the deceased’s original cost.

The UK tax position for the beneficiary

Receiving an overseas inheritance is not a UK income or capital gains event, regardless of the size of the transfer. The UK does not tax the receipt of a US inheritance by a UK-resident beneficiary. Three downstream considerations apply:

• The UK-US Estate Tax Treaty (1978). The treaty prevents double taxation of US assets and provides relief where both UK and US tax could apply. For most UK beneficiaries of estates of US-domiciled deceased persons, UK Inheritance Tax does not apply because the deceased was not UK-domiciled. The treaty contains specific provisions for assets located in either jurisdiction.
• Subsequent income and gains are UK-taxable. Once the inheritance is in your hands, any interest, dividends, rental income or capital gains generated by the inherited assets fall within UK Self Assessment.
• Anti-money-laundering reporting on receipt. A large inbound transfer prompts routine source-of-funds questions from the UK bank. A copy of the US probate grant (Letters Testamentary or Letters of Administration) and the executor’s distribution letter usually satisfy AML requirements.

The currency question: USD/GBP timing across a US probate

US probate timelines vary by state. California and New York probate typically takes 9 to 18 months; Florida runs faster at 6 to 12 months. Total estate administration including asset realisation runs 6 to 18 months. The relevant period for the UK beneficiary is the window between executor confirmation of the inheritance and final distribution.

GBP/USD has traded between 1.21 and 1.38 over the past 24 months, with 10 to 12 percent ranges across rolling 12-month windows. The pair currently sits at 1.3488. On a $500,000 inheritance, a 10 percent adverse move on GBP/USD across the probate window represents around £35,000 of sterling value at risk — and a 10 percent favourable move the same magnitude of upside. The drivers of GBP/USD are well-known: relative monetary policy between the Federal Reserve and the Bank of England, growth differentials, fiscal positioning, and global risk sentiment.

“For UK beneficiaries of a US estate, the FX leg is often the largest single variable in the eventual sterling figure,” says Anthony Bull, CEO of Cambridge Currencies. “State estate tax adds at most a few percent. State inheritance tax adds at most 15 percent on portions of the estate. GBP/USD can move 10 percent inside the probate window itself. Booking a forward at probate grant is the cleanest way to remove that variable.”

Four ways to move a US inheritance to the UK, compared

For UK beneficiaries of a US inheritance above $200,000 with probate granted but distribution months away, the forward contract is usually the right tool. The combination of GBP/USD’s typical 10–12 percent annual range and the 6–18 month US probate timeline makes the FX risk meaningful enough that locking the rate is structurally the correct call.

Worked example: $500,000 US inheritance, 9-month probate

A UK resident inherits $500,000 from a parent’s estate in California. Probate is granted on 22 May 2026. The executor expects distribution in February 2027 — 9 months — after the family home is sold, IRA accounts are liquidated, and federal Form 706 is filed. Spot GBP/USD today is 1.3488. The $500,000 inheritance is worth approximately £370,700 at current rates.

A 10 percent range over 9 months on GBP/USD is well within historical norms — the pair has done as much across single quarters multiple times. The forward removes a £74,900-range outcome variance and turns “approximately £370,000” into “£370,700 on a specific February date.” For a UK beneficiary planning around the sterling figure for a property purchase, mortgage clearance or pension contribution, the certainty matters more than the upside.

The same logic applies to other lump-sum repatriations — see our guide to transferring large sums internationally.

Step-by-step: receiving a US inheritance in the UK

1. Confirm the executor and asset breakdown. Get the executor’s contact details, the asset inventory (cash, real estate, IRA/401(k), brokerage holdings, life insurance), and an estimated timeline. Federal Form 706 filing is required within 9 months of death for estates above the federal exemption (with a 6-month extension available).
2. Confirm the state estate tax position. Twelve states plus DC have estate tax, with thresholds and rates that vary materially. The relevant state is where the deceased was domiciled at death. Where state estate tax applies, the estate pays it before distribution; this changes the net figure the UK beneficiary receives.
3. Get UK tax position confirmed. Brief consultation with a UK-qualified tax adviser confirms the position. For estates including UK situs assets (UK property held by the deceased), the position is more nuanced.
4. Open a UK specialist broker account. Onboarding takes 24–48 hours. You will need passport, proof of UK address, and source-of-funds documentation (the US probate grant and executor’s letter).
5. Book a forward contract once distribution date is confirmed. Lock the USD/GBP rate for the expected distribution date. Pay the 5–10% deposit on booking.
6. Receive distribution, fund the forward, take GBP delivery. When the executor distributes funds, send USD to the broker’s US collection account. The broker delivers GBP at the locked rate to your UK bank on the forward maturity date.

Common mistakes UK beneficiaries make

• Ignoring state-level taxes. The $15 million federal exemption gets all the headlines; state estate tax thresholds in Massachusetts ($2m), Oregon ($1m), or Washington ($2.193m) catch many UK beneficiaries by surprise.
• Letting the US bank handle the conversion. US banks apply 2.5–4 percent retail FX margins on outbound USD/GBP wires, plus intermediary deductions on SWIFT routing.
• Forgetting the 9-month Form 706 deadline. For estates above the federal exemption, the federal estate tax return is due within 9 months of death. Late filing penalties are substantial; cash distributions to beneficiaries are typically deferred until the return is filed.
• Treating IRA/401(k) distributions as inheritance. Inherited retirement accounts have specific tax treatment in both jurisdictions — they pass outside the estate via beneficiary designation, but distributions are typically taxable as income in the US (with potential UK reporting under the US-UK tax treaty).
• Underestimating GBP/USD volatility. UK beneficiaries who assume USD is “safe” through a 9-18 month probate window face the same 10–12 percent range as any other GBP/USD exposure.

What about inherited US property, retirement accounts, brokerage holdings?

• US real estate. The executor typically sells inherited property and distributes cash. The capital gains step-up to fair market value at death usually means modest CGT on sale (only post-death appreciation is taxable). For UK beneficiaries who inherit and hold US property, ongoing rental income is US-taxable and reported on UK Self Assessment with treaty credit relief.
• IRA, 401(k), Roth IRA. Inherited retirement accounts pass via beneficiary designation, outside the probate estate. For non-spouse beneficiaries, the SECURE Act requires the inherited IRA to be distributed within 10 years. UK beneficiaries face US income tax on distributions; the US-UK Income Tax Treaty provides specific guidance on the cross-border treatment.
• US brokerage holdings. Inherited US-listed shares can be transferred in-kind to a UK brokerage that handles US securities, or sold by the estate and distributed as cash. The step-up to fair market value at death applies in either case.

Why use a specialist broker rather than a US or UK bank?

US banks apply retail FX margins of 2.5–4 percent on outbound USD/GBP wires, with intermediary bank deductions on long-haul SWIFT routing. UK banks receiving inbound transfers charge similar margins. A specialist broker operating through FCA-authorised partners typically prices 0.4–0.8 percent above mid-market, with a US collection account, GBP delivery in the UK, and one named specialist managing the file from probate grant through delivery.

On a $500,000 US inheritance, the FX margin difference between a US bank wire and a specialist broker is typically £5,000–£12,000 retained — before the value of locking the rate with a forward contract. Every Cambridge Currencies transaction is completed by phone with a dedicated specialist who knows the file. The same approach applies to transferring any large sum internationally.

Frequently asked questions about inheritances from the USA to the UK

Speak to a specialist about your US inheritance

If you are the UK beneficiary of a US estate — probate granted, awaiting distribution, or just notified by the executor — a short conversation with a Cambridge Currencies specialist will set out the spot, forward and market order options for your specific timeline and target sterling figure. Every transaction is completed by phone with a dedicated specialist who follows the file from probate grant through to UK arrival. Read our Australian inheritance guide, our Canadian inheritance guide, or our South African inheritance guide for parallel corridors.

Sources: IRS Form 706, HMRC Inheritance Tax Manual, Federal Reserve, FCA Financial Services Register.