Currency Risk for Americans Living in Europe: CHF, GBP & EUR Explained

Why Currency Quietly Shapes Your Plan

An American couple I work with in Zurich opened their US brokerage app one morning a few years ago, saw a portfolio that had risen in dollar terms, and felt poorer. Their rent in Swiss francs had gone up more than their US-dollar wealth had. That moment, watching a strong portfolio feel weak, is the best one-line description I can give of the currency question that sits underneath every cross-border household's finances, and the one most often missed on US-centric retirement projections.

This article explains how currency exposure actually works for US citizens and green card holders whose salary, spending, or savings cross between US dollars and a non-US currency. The focus is on the three currencies that produce the largest and most volatile exposures for US-citizen readers abroad: the Swiss franc, the British pound, and the euro. Pegged and tightly managed currencies, including those in the Gulf, behave differently and are addressed briefly at the end with pointers to the country-specific articles in this series.

Why Currency Works Differently for Americans

An American living abroad sits in two currency systems at once. US tax filing, which continues wherever the citizen lives, is in US dollars: income, gains, losses, and account balances all translate back to dollars at the relevant exchange rate for reporting. Day-to-day life, though, is in local currency: rent, groceries, school fees, pensions contributed locally, and everything the household actually consumes. The two systems often disagree about whether a given year was a good one.

The mismatch is why a US-centric portfolio that gains 10% in dollar terms can still fall behind a household's real cost of living when the local currency strengthens against the dollar by more than that. And it is why currency is rarely a single decision, it is a question asked at three different points in a family's balance sheet, each with a different answer.

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The Three Currency Questions

The most useful reframe I can offer is to stop thinking of currency as one exposure and start thinking of it as three. Each sits in a different part of the household balance sheet, and each has a different sensible answer.

The currency you're paid in

An American on a local employment contract is typically paid in local currency, pounds, euros, francs, and bears short-term currency risk on every paycheck through the US dollar filter of their tax return. An American on a US-dollar expatriate package has the opposite problem: salary in dollars, bills in local currency, and exchange-rate risk sitting on the spending side of the household rather than the income side.

The currency you spend in

This is the currency of the reader's actual life, rent, mortgage, school fees, groceries, holidays. For most Americans overseas, it is the currency of the country they live in, and it is remarkably sticky: it does not move when the market does. If local costs keep rising in local-currency terms, a household whose wealth is held entirely in dollars is taking two risks simultaneously, the market risk they can see and the currency risk they often cannot.

The currency your savings are held in

Savings and investments are where the currency question gets most complicated for US citizens. A natural instinct is to match savings to the currency the household will eventually spend them in. That is often the right general direction, but US citizens cannot freely hold non-US mutual funds because of the PFIC rules, and many common non-US savings wrappers (foreign pensions, insurance bonds, investment-linked products) have their own reporting and tax frictions. The matching principle is correct; the instruments available to execute it are narrower than they look.

How This Plays Out for a US-citizen Household

Rather than a country-by-country walk-through, the table below is built around the four household archetypes I see most often. Each has a different balance between dollars and local currency across income, spending, and savings, and a different set of US tax and reporting consequences.

Source: Skybound 2026

The Special Case of Pegged and Managed Currencies

Some currencies are either formally pegged to the US dollar (the Saudi riyal, the UAE dirham, the Qatari riyal, the Bahraini dinar, the Omani rial) or tightly managed against it (the Kuwaiti dinar against a basket in which the dollar dominates). For Americans living in those countries, the day-to-day currency risk this article describes largely does not apply. A dollar-denominated salary and a local-currency cost of living move together. That does not mean the financial-planning question disappears, it simply shifts onto other issues: US tax on local earnings, the structure of locally provided end-of-service benefits, and what happens to savings once the reader leaves the peg zone. Those are addressed in Article 9 (pre-arrival /departure checklists for Americans in the Middle East) and Article 27 (the expat-in-the-US piece for Middle East returnees) rather than here.

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Questions To Raise With A Qualified Adviser

For a US citizen living in a non-dollar country who wants to think clearly about the currency exposure across their household, questions worth raising with a qualified cross-border planner include:

• What is my effective currency mix across income, spending, and long-term liabilities, and does my investment allocation reflect it?
• For the savings I will spend in local currency in retirement, is there a US-compliant way to hold local-currency exposure?
• Which of my non-US accounts and wrappers are PFIC-exposed, and what does the US tax treatment look like?
• How should I think about a local mortgage taken out in local currency, when I also hold dollar-denominated retirement assets?
• If I have an end-of-service or similar lump-sum entitlement in local currency, what is the optimal currency for the dollars once they land?
• How does §988 actually apply to my situation, and where is it likely to produce avoidable frictions?

The currency question, in my experience, is almost always secondary to the broader question of how a household wants to live, but it is the question most often overlooked on a US-centric plan, and the one most likely to quietly erode purchasing power over time.