10 Financial Mistakes British Expats Make (and How to Avoid Them)

Moving abroad is exciting. It is also financially complex in ways that are easy to underestimate. After more than three decades advising internationally mobile clients, we have seen the same mistakes recur — sometimes costing tens of thousands of pounds, sometimes causing family disputes that last decades.

This guide covers the ten most common financial errors British expats make. None of them are obscure or technical. All of them are avoidable with the right planning.

1. Not Updating Wills After Moving

A will made under English law may not be automatically recognised or valid under the law of your host country. In many civil law jurisdictions (France, Spain, Germany, and much of mainland Europe), forced heirship rules override the terms of a foreign will — meaning that regardless of what your will says, a set proportion of your estate must pass to your children, not your spouse. Some countries require a local will to deal with local assets.

The consequences of dying intestate — or with a will that cannot be properly executed — range from costly legal proceedings to assets being distributed in ways you would never have intended.

The fix is straightforward: after moving abroad, consult a solicitor or notary who specialises in cross-border estates. In most cases you will need both a UK will (for UK assets) and a local will (for local assets). Under the EU Succession Regulation (which applies in most EU countries, though the UK has not opted in), you can elect for the law of your nationality to govern your estate, which may be worth doing in writing.

Review your wills every three to five years or whenever you move countries.

2. Keeping All Your Money in the Host Country

Many expats, especially those who settle somewhere long-term, migrate their finances entirely to their host country. All savings, investments, and currency holdings end up denominated in the local currency and subject to local banking risk.

This creates dangerous concentration. If the host country's currency devalues sharply (as happened in Turkey and Egypt in recent years), your purchasing power in sterling or dollars collapses. If political or economic instability affects banking access, you may find it difficult to move money.

A sensible approach is to maintain financial diversification across jurisdictions. Keeping some assets in sterling-denominated accounts, some in USD if you travel widely, and some in the host currency is a basic form of protection. Consider using an international banking platform (Citibank International, HSBC Premier International, or a regulated offshore bank in a stable jurisdiction like the Isle of Man or Malta) that provides multi-currency access and robust account protection.

3. Losing UK Pension Benefits

British expats who stop UK pension contributions — whether to an employer scheme or a personal pension — may lose significant benefits:

• Employer contributions: if you leave a UK employer without a vested employer pension contribution, you may lose it entirely.
• State Pension gaps: if your NI contribution record falls below 35 qualifying years, your State Pension will be permanently reduced.
• Pension pot management: leaving old employer pensions unconsolidated means they accumulate charges and are likely to be poorly invested.

Pension planning as an expat requires active management, not passive neglect. Review all UK pension pots, consider consolidating small pots, and maintain NI contributions if your State Pension shortfall can be economically filled (see below).

4. Not Maintaining National Insurance Contributions

The UK State Pension requires 35 qualifying years of National Insurance contributions for the full amount (£241.30 per week / approximately £12,548 per year in 2026/27, rising with the Triple Lock). Periods spent abroad — whether working for a foreign employer or self-employed — may not automatically count as qualifying years.

Voluntary Class 2 or Class 3 NI contributions allow expats to fill gaps in their NI record while abroad. Class 2 contributions (available to those working abroad) are significantly cheaper than Class 3 (for non-workers) and represent outstanding value — typically a few hundred pounds per year in exchange for an additional £360 or so of annual State Pension, guaranteed for life and inflation-linked.

Many expats do not know this option exists. Check your NI record via the HMRC online portal, calculate your current projected State Pension, and consider making voluntary contributions if gaps exist. There are time limits — normally you can only go back six years, though specific schemes for certain professions may allow longer.

5. Not Getting International Private Medical Insurance

Healthcare that feels free or affordable in the UK is often expensive elsewhere. Even in countries with good public healthcare, expats may face barriers to access (registration requirements, language barriers, long waits for specialists) and may not be eligible for public healthcare until they have been resident for a period.

International Private Medical Insurance (IPMI) is the standard solution. A good policy covers inpatient and outpatient treatment, evacuation to your home country if needed, and a global network of hospitals. For pre-existing conditions, specialist policies and agreed exclusions can be arranged. The cost varies widely by age and coverage, but is typically several thousand pounds per year for a couple in their fifties.

Do not assume the state will look after you, and do not assume your UK travel insurance covers long-term residence — it almost certainly does not.

6. Missing Self-Assessment Registration

If you are a UK non-resident with UK source income — rental income from UK property, employment income from a UK employer, pension income above the personal allowance — you are likely required to file a UK Self Assessment tax return each year.

Many expats either do not know this, or allow the obligation to lapse. HMRC does not always contact you proactively. The penalties for late filing accumulate: £100 immediately, rising to £1,000 or more if left unfiled for 12 months, plus interest on any unpaid tax.

If you have any UK source income as a non-resident, check your filing obligation and register for Self Assessment (via HMRC's online service) within three months of the end of the relevant tax year.

7. Forgetting the Statutory Residence Test

The UK's Statutory Residence Test (SRT) determines whether you are a UK tax resident in any given tax year. It is not simply a matter of spending more than 183 days outside the UK. The SRT contains multiple automatic UK residence tests and automatic non-residence tests, plus a set of "sufficient ties" tests that can make you resident even with relatively few days in the UK if you retain strong connections.

The most common SRT mistake is assuming you have "left" the UK for tax purposes when you have not in fact met the non-residence tests. This can mean years of incorrect tax filings, double taxation, and substantial penalties.

Before relying on UK non-resident status, go through the SRT in detail — ideally with a tax adviser who specialises in international individuals. The split-year rules, which apply in the year of departure and arrival, add another layer of complexity.

8. Not Using Overseas Tax-Free Status Properly

Some jurisdictions offer extremely low or zero income tax on foreign-sourced income. UAE, Bahrain, and Cayman Islands, for example, have no personal income tax at all. Countries like Malta and Cyprus offer flat-rate schemes for qualifying non-domiciled residents. Portugal's former NHR regime (now replaced by IFICI) offered incentives on foreign income.

The mistake is not taking advantage of these regimes properly. Expats may continue unnecessarily to route income through the UK (triggering UK tax) when it could legitimately be received directly in their country of residence tax-free. Others may miss the deadline to register for a local tax incentive regime, losing several years of benefit.

Taking structured advice on how to receive income, dividends, pension income, and investment returns in the most tax-efficient jurisdiction — consistent with substance and legal requirements — is a legitimate and material financial planning exercise.

9. Failing to Document Source of Funds

Anti-money laundering (AML) regulations have tightened dramatically across the world. Banks, investment platforms, property developers, and law firms are all required to conduct due diligence on the source of funds used in significant transactions. This is particularly relevant for expats who accumulate wealth across multiple countries and currencies.

If you cannot document where your money came from — savings from employment in multiple countries, inheritance, property sales, business proceeds — you may find it impossible to open accounts, complete property purchases, or transfer large sums. In the worst cases, banks may freeze accounts pending investigation.

The fix is to maintain a clear paper trail: employment contracts, payslips, property sale documents, business accounts, and tax returns from each jurisdiction where you have operated. Keep them digitally and securely. Before a major transaction, assemble your source-of-funds documentation proactively.

10. Ignoring the QROPS Decision

A Qualifying Recognised Overseas Pension Scheme (QROPS) is a pension arrangement outside the UK that HMRC has approved to receive transfers from UK pension schemes without a tax charge. Moving a UK pension into a QROPS — typically in Malta, Gibraltar, or another jurisdiction — can in some circumstances offer benefits such as local currency management, a different tax treatment on drawdown, and freedom from the UK's Lifetime Allowance (now abolished) and certain death benefit rules.

The mistake expats make is either ignoring QROPS entirely (leaving a significant planning tool unused) or transferring into a QROPS inappropriately — without proper advice, into a poorly regulated scheme, or without understanding the Overseas Transfer Charge (OTC), which applies at 25% in certain circumstances.

QROPS planning is complex and highly individual. Whether it is appropriate depends on your country of residence, the size of your pension, your tax situation in retirement, and your likely future residence. The OTC rules mean that inappropriate transfers can be very costly. This is an area where professional advice is not optional.

Compliance Note

Rules governing pensions, tax, wills, and residency change regularly across multiple jurisdictions. This article reflects the position as of 2026 and is intended for general guidance only. It does not constitute legal, tax, or financial advice. You should seek qualified professional advice before making any decisions based on the information here. Tax treatment depends on your individual circumstances and the laws of the relevant jurisdictions.

How Global Investments Can Help

These mistakes are common precisely because international financial planning is genuinely complex. Global Investments specialises in advising internationally mobile clients who need to navigate the laws of multiple countries simultaneously. Whether you are preparing to move, already abroad, or returning to the UK, we can help you avoid the traps and make the most of your international financial position. Contact our team for a consultation.