US Citizens Living Abroad: Why Cross-Border Financial Planning Is Different

Recent data indicates that increasing numbers of US citizens are choosing to leave the US for a new life abroad. In 2025, the United States experienced a period of negative net migration, with more citizens leaving than arriving - a pattern not seen since 1935. Relocation decisions are often driven by lifestyle or career goals, but the financial implications are not always fully understood.

Many individuals focus on the immediate logistics of relocating, such as employment, housing, and visas, without fully assessing how their finances will be affected. Yet moving abroad can significantly alter how your income is taxed, how your investments are managed, and how your long-term financial plans should be structured.

This article outlines some of the key financial considerations for US citizens living overseas, helping you better understand the potential risks and the steps you can take to manage them effectively.

One of the most significant differences for US citizens living overseas is that the United States taxes based on citizenship rather than residency. This means you are generally required to file US tax returns regardless of where you live.

In addition to local tax obligations, this creates overlapping responsibilities. Provisions such as the Foreign Earned Income Exclusion can help reduce taxable income, with thresholds increasing over time. For 2026, the maximum exclusion is $132,900 per person. However, these reliefs must be applied carefully within a broader financial planning strategy to avoid unexpected liabilities.

Living in another country often means navigating two tax systems at once. Tax treaties can help determine which country has taxing rights over certain types of income, but they rarely eliminate complexity altogether.

Effective financial planning involves aligning your income, investments, and residency status in a way that supports tax efficiency while remaining compliant in both jurisdictions. 

Coordinated professional advice becomes particularly valuable here, ensuring that decisions in one country do not create unintended consequences in another.

For many United States citizens living abroad, retirement accounts such as 401(k)s remain a central part of their long-term financial planning. However, managing these assets from overseas can be significantly more complex than anticipated.

Access to suitable financial advice is often limited, as many advisers - both in the US and internationally - do not support cross-border clients. This can leave individuals without the guidance needed to make informed decisions around withdrawals, tax implications, or consolidation strategies.

Practical challenges can also arise when accessing funds. In some cases, transferring a 401(k) or similar retirement account to a non-US arrangement in your country of residence is not straightforward and may even be restricted. Distributions are often issued as cheques from US providers, which can create difficulties if you have already closed your US bank account. This can lead to delays, administrative burdens, and complications in receiving your income reliably.

These logistical issues highlight the importance of forward planning. Ensuring you maintain appropriate banking arrangements or explore alternative withdrawal strategies can help avoid disruption when you begin drawing on your retirement savings.

When leaving the US, individuals typically have three main options for their 401(k):

• Leave the funds in the existing plan
• Draw down the funds
• Roll the funds into an Individual Retirement Account (IRA)  

Each option has different implications. Leaving the plan may be simple, but it can limit investment flexibility. Drawing down funds can trigger tax liabilities and, in some cases, withholding taxes of up to 30% for non-residents.

Rolling over to an IRA is often considered because it can provide greater control, broader investment options, and improved estate planning flexibility. A properly executed direct rollover allows assets to remain tax-deferred, avoiding immediate tax consequences.

However, the process must be handled carefully. Indirect rollovers, for example, involve strict 60-day deadlines and potential withholding requirements, which can create unnecessary complications if not managed correctly.

For many individuals living overseas, a US-based retirement account such as an IRA may represent one of their largest financial assets. Holding this wealth in US dollars while living and planning to retire in another country introduces a significant layer of currency risk.

Exchange rate movements can materially affect the value of your investments when converted into your local currency. Even if your portfolio performs well in US dollar terms, gains can be reduced - or even erased - by unfavourable currency fluctuations.

For example, an investment valued at 100,000 US dollars might grow to 110,000 US dollars over a year. However, if the local currency strengthens during that period, the converted value could fall despite the underlying growth. This creates a disconnect between investment performance and real-world spending power in your country of residence.

Managing this risk requires careful consideration as part of your broader financial planning. Strategies such as currency diversification or restructuring how assets are held may help reduce exposure and provide greater certainty over your future income.

Cross-border rules can significantly affect your investment management options. Certain non-US investment products may face unfavourable tax treatment under US regulations, while some US-based platforms restrict access for overseas residents.

In addition, some accounts may limit new contributions or investment choices once you leave the US. This makes it essential to review your portfolio regularly and ensure it remains aligned with both US and local regulations, as well as your long-term objectives.

US citizens abroad often face additional reporting obligations, including disclosure of foreign financial accounts under the Foreign Account Tax Compliance Act (FATCA). This legislation requires foreign financial institutions to report accounts held by US persons to the Internal Revenue Service, increasing transparency but also adding administrative complexity.

As a result of these requirements, some banks in certain jurisdictions choose to limit or decline services for US citizens due to the additional compliance burden associated with FATCA. This can make opening and maintaining overseas bank accounts more challenging than expected.

Alongside FATCA, individuals may also need to report foreign accounts in their country of residence. Maintaining accurate records and understanding these reporting requirements is essential to avoid penalties.

Planning for retirement becomes more intricate when your working life spans multiple countries. Differences in pension systems, contribution rules, and tax treatment can all influence your strategy.

You may also need to consider required minimum distributions from US retirement accounts, which typically begin in your early 70s and carry penalties if not taken correctly.

A structured approach to wealth creation considers how to balance US retirement accounts with local pension arrangements, while also managing currency exposure and accessibility.

Cross-border living introduces additional layers of complexity when planning how your wealth will be passed on. For United States citizens, estate and gift tax applies to worldwide assets, with rates reaching up to 40% where thresholds are exceeded. This can have a significant impact on the value ultimately received by your beneficiaries.

When assets are left to a non-US citizen partner, the rules can become more restrictive. Unlike transfers to a US citizen spouse, which may benefit from an unlimited marital deduction, this treatment does not generally apply where the surviving partner is not a US citizen. As a result, the estate may be subject to tax once it exceeds the available exemption threshold.

It is important to distinguish this from the rules applying to non-US individuals. Those who are neither United States citizens nor US domiciled are typically only subject to estate tax on US-based assets. In these cases, the exemption is significantly lower, often limited to 60,000 US dollars, with any excess potentially taxed at rates of up to 40%.

Another key but often overlooked issue is beneficiary access. If your heirs do not hold a valid US Social Security Number, they may face delays or even barriers when attempting to claim inherited assets. Many providers of retirement plans, including 401(k)s, require either a Social Security Number or an Individual Taxpayer Identification Number before distributions can be processed. Without the appropriate identification, accessing funds can become time-consuming and administratively challenging.

There are also important responsibilities placed on executors. If estate tax filings are not completed correctly or liabilities are not settled, executors themselves may be held accountable for the outstanding amounts.

Given these risks, structured planning is essential. Options such as establishing trusts, making lifetime gifts, and selecting investment structures with estate planning flexibility can help reduce exposure and improve the efficiency of wealth transfer.

This is a highly specialised area where professional guidance is critical. Without careful planning, unnecessary tax charges and administrative complications could significantly reduce the value of your estate and delay access for your loved ones.

You’ll find plenty more useful information in our guide for US citizens living abroad; however,

given the complexity involved, working with a financial adviser who understands both US and international regulations is essential. A coordinated approach ensures that tax, legal, and investment decisions are aligned rather than working against each other.

Our team of advisers across the globe have a wealth of cross-border expertise and can support a wide range of needs, from retirement planning and investment management to estate structuring. Hoxton Wealth’s global perspective and joined-up approach help ensure your financial strategy remains effective, wherever life takes you.

If you’re living abroad and struggling with any of the issues raised in this article, or you’re planning a move and would like to make sure you have factored in all relevant financial considerations, reach out and we’ll put you in touch of an adviser who can support you in structuring your finances effectively across borders, giving you peace of mind.Bottom of Form