Drawdown Fund Sustainability for Expats: Making Your Pension Last

For UK nationals living abroad in drawdown, the challenge of making a pension fund last is compounded by risks that domestically retired individuals do not face. Currency fluctuation, foreign income tax, the cost of living in a different country, and limited access to the NHS all create additional variables. This guide examines how expats in flexi-access or legacy capped drawdown can assess and manage the sustainability of their pension fund over a retirement that might span thirty years or more.

The core sustainability challenge

The fundamental question in any drawdown arrangement is whether the fund can support the desired income level throughout the individual's lifetime without running out. This depends on the interaction of three variables: the rate of withdrawal, the net investment return achieved, and the duration of retirement.

For a UK resident, these variables are already difficult to model with precision. For an expat, additional layers of complexity arise:

• Withdrawals are received in sterling but spent in a foreign currency, making real purchasing power dependent on exchange rates that can move 20–30% over a few years
• Income tax may be levied in the country of residence rather than (or in addition to) the UK, depending on the applicable double taxation agreement
• Healthcare costs, which in the UK are largely absorbed by the NHS, must be met privately or through insurance abroad
• Local inflation in the country of residence may differ substantially from UK inflation, affecting how much the income buys over time

Understanding sustainable withdrawal rates

Research on sustainable withdrawal rates — most famously the "4% rule" from US research in the 1990s — suggests that withdrawing approximately 3–4% of a diversified portfolio annually gives a high probability of the fund lasting 30 years. This research, however, was based on US market returns and dollar-denominated spending. For UK investors with sterling-denominated funds but foreign-currency expenditure, the equivalent "safe" withdrawal rate is likely lower.

A more conservative benchmark for expats would be 3–3.5% of the fund value in the first year of retirement, with adjustments for changes in the fund value and income needs. This figure should be recalculated annually, not treated as a fixed withdrawal level.

At current annuity rates (2026), a 65-year-old can secure a level annuity of approximately 6–7% of the fund value per year. This illustrates the opportunity cost of choosing drawdown over an annuity — you bear the investment and longevity risk in exchange for flexibility and the potential for fund growth.

Currency risk management

If your pension is in sterling but you spend in euros, dirhams, baht, or dollars, your effective income in local currency terms fluctuates every time you make a withdrawal. A 10% depreciation of sterling between withdrawals represents a 10% real income cut.

Strategies for managing currency exposure include:

Maintaining a local currency reserve: Hold several months' living expenses in local currency in a bank account abroad. This buffers short-term exchange rate movements and avoids having to convert at unfavourable rates under time pressure.

Batching withdrawals: Rather than making small monthly withdrawals, take larger quarterly or six-monthly withdrawals when exchange rates are relatively favourable and hold the proceeds in local currency.

Currency-hedged investment funds: Some drawdown providers offer funds that hedge sterling against major currencies. These reduce volatility in real terms but typically carry higher charges and reduce potential upside if sterling strengthens.

Limiting fund exposure to UK-only assets: Diversifying the pension fund into global equities means the underlying portfolio already has natural currency diversification, partially offsetting the sterling-spending mismatch for non-UK income earners.

Foreign income tax

The taxation of UK pension income for non-UK residents depends on the double taxation agreement (DTA) between the UK and the country of residence. Under many DTAs — including those with France, Spain, Portugal, and Germany — pension income is taxable in the country of residence, not the UK. In other jurisdictions, such as the UAE, there is no income tax at all.

Where pension income is taxed abroad, the UK should give credit for foreign tax paid to prevent double taxation. In practice, UK pension providers may still deduct emergency PAYE at source on withdrawals until HMRC issues a NT (nil tax) code — a process that can take months. During this period, cash flow planning is critical: you may receive significantly less than expected while waiting for the NT code and subsequent reclaim.

Expats should engage both a UK tax adviser and a local tax adviser in their country of residence to understand the precise tax treatment before commencing drawdown. Tax rules in foreign jurisdictions change, and what applied when you moved may have changed by the time you retire.

Sequencing risk in multi-currency drawdown

Sequencing risk — the danger that poor investment returns in the early years of retirement permanently impair the fund's ability to recover — is heightened for expat drawdown investors. A sterling depreciation coinciding with a stock market fall, at the point when you are making large conversions to local currency, can dramatically accelerate fund depletion.

Practical responses to sequencing risk include:

• Maintaining a "cash buffer" in the pension fund (typically one to two years' income in cash or short-duration bonds) so that withdrawals are not forced from equity holdings during a downturn
• Using a "bucket" strategy, dividing the fund into short-term (cash), medium-term (bonds/multi-asset), and long-term (equities) components
• Reducing the withdrawal rate during periods of significant market or currency stress, if living costs can be temporarily reduced

Healthcare costs abroad

Private medical insurance and out-of-pocket healthcare costs vary enormously between countries. In Thailand, private hospitals are affordable by UK standards; in the US, even a short hospital stay can cost tens of thousands of dollars. When modelling drawdown sustainability, many expats underestimate the trajectory of healthcare costs in later life.

A conservative approach is to include an explicit healthcare cost projection in your retirement income model, with costs increasing at a rate above general inflation and rising sharply from age 75 onwards. This is particularly important in countries without comprehensive public healthcare for foreign residents.

Longevity planning

UK life expectancy at 65 is approximately 20 years for men and 22 years for women on average, but averages are misleading for planning purposes. Individuals who are currently healthy and financially comfortable at 65 often live into their late eighties or beyond. Drawdown plans should model scenarios to age 90 or 95 as a planning horizon, not the average.

Some expat retirees consider purchasing a partial annuity — covering essential living costs — and placing the remainder in drawdown for discretionary spending. This hybrid approach provides longevity insurance on the core income while retaining flexibility for the surplus.

Provider access and flexibility

Not all UK pension providers are willing to maintain drawdown accounts for clients who have moved abroad. Some platforms restrict access, freeze accounts, or require you to maintain a UK bank account. Before moving abroad, check explicitly whether your pension provider will continue to service a drawdown account at a foreign address.

Where access is restricted, a transfer to an international SIPP operated by a specialist expat pension administrator may be appropriate. International SIPPs typically offer greater flexibility in terms of currency, reporting, and drawdown administration for overseas residents, though they may carry higher charges.

Annual drawdown review

A structured annual review of the drawdown fund should cover: current fund value and withdrawal rate; investment performance against benchmark; exchange rate movements and local currency position; changes in tax status or DTA position; updated longevity assumptions; and any changes in living costs or healthcare requirements.

For expat drawdown investors, this review is best conducted with an adviser who understands both UK pension legislation and the tax framework of the country of residence. The two frequently interact in ways that require coordinated advice.

This is not a substitute for personal advice

Every expat's situation is different. The tax treatment of pension income depends on your country of residence, the applicable DTA, and your individual income profile. Investment returns, exchange rates, and living costs cannot be predicted. This guide provides a framework for thinking about drawdown sustainability but does not constitute financial advice. You should seek regulated advice from a qualified adviser who holds the appropriate permissions to advise on both UK pensions and international financial planning.

How Global Investments Can Help

Global Investments specialises in retirement income planning for UK nationals living abroad. Our international team understands the interplay between UK drawdown rules, foreign tax systems, currency management, and estate planning. Whether you are approaching retirement overseas or reviewing an existing drawdown arrangement, we can help you build a robust, tax-efficient income plan designed to sustain your lifestyle for the long term. Contact us to arrange a free initial consultation.