Americans abroad need specialists who know both tax systems cold.

In almost every case, yes. The intersection of US worldwide taxation (FATCA, FBAR, PFIC treatment of local investment products, and IRS retirement account rules) with your host country's financial regulations is genuinely specialist territory. Most financial advisers, even experienced ones, are not equipped to navigate both sides simultaneously.

FBAR (FinCEN Form 114) is filed annually by any US person with a financial interest in, or signature authority over, foreign financial accounts with an aggregate value exceeding $10,000 at any point during the calendar year. The penalties for non-compliance are substantial. A cross-border specialist can help ensure your reporting obligations are correctly met.

FBAR is filed separately with FinCEN and covers foreign bank and financial accounts. FATCA (Form 8938, filed with your US tax return) covers a broader range of specified foreign financial assets, with different reporting thresholds. Both can apply simultaneously to a US citizen living abroad. A qualified cross-border adviser can help you identify which obligations apply to your specific situation.

In many cases, yes, but the US tax treatment is complex. Under the UK-US tax treaty, SIPP contributions may be deductible on a US return, but a treaty election must be invoked correctly. Without appropriate specialist guidance, there is a risk of double taxation on contributions or withdrawals. This is an area where someone with experience of both HMRC and IRS rules is essential.

QROPS transfers for US persons carry significant additional complexity. Transferring a UK pension to a QROPS may create foreign grantor trust reporting obligations under US law (Form 3520), and in some circumstances trigger immediate tax events. Whether a QROPS is appropriate for a US person depends heavily on their overall US tax position. Specialist advice is essential before any transfer decision.

US retirement accounts remain subject to US tax rules regardless of where you live. However, the interaction with your host country's tax treatment varies: some jurisdictions recognise the deferred status of US retirement accounts; others may not. A specialist can help you understand the most efficient way to manage withdrawals or rollovers across both tax systems.

Often yes, as a reporting matter rather than a tax one. A US person who receives more than $100,000 in a tax year in gifts or bequests from a non-US individual or foreign estate must report it to the IRS on Form 3520. The inheritance itself is generally not subject to US income tax, but the penalty for late or missed filing is 5% per month, up to 25% of the amount, absent reasonable cause. A lower, inflation-indexed threshold ($20,573 for 2026) applies to gifts from foreign corporations or partnerships. A US-qualified accountant handles the filing.

US citizens and long-term green-card holders who give up their status and meet certain net-worth or tax thresholds are treated as covered expatriates. Gifts or bequests they make to a US person can trigger a 40% succession tax under IRC §2801, payable by the US recipient on the amount above the annual exclusion. These rules became operational with final regulations and Form 708, effective for transfers received from 1 January 2025. This is a specialist area, handled with a US-qualified adviser.

Generally yes. US persons who inherit foreign assets usually receive a step-up in cost basis to the date-of-death value, which can significantly lower the capital gains tax due on a later sale. One important exception: income in respect of a decedent, such as foreign pensions, deferred compensation, or accrued interest, does not step up. The interaction with the rules of the other country varies, and a specialist confirms the position.