How Much Do You Really Need to Retire Abroad?

"How much do I need to retire?" is a question everyone hopes has a simple, definitive answer. The truth is there is no single number. For expats, three extra factors can change the amount, which most domestic retirement guides do not cover.

This guide complements our article about where you can afford to retire abroad. That article helps you pick a country; this one helps you figure out how much money you need before you move.

We explain the method, adjustments for expats, and provide a calculator to estimate your number. Use the result as a guide and starting point.

The rule of thumb — and why it needs an asterisk

The classic shortcut is the 4% rule: withdraw 4% of your invested pot in your first retirement year, increase with inflation each year, and it will likely last 30 years.

Flip that around and it gives you a target: to generate £1 of income, you need about £25 of savings. Want £20,000 a year? You need roughly £500,000. That "multiply by 25" is the mental maths most people use.

It's a useful anchor but comes with a warning. The 4% rule was based on historical US market data. Recent forward-looking research has lowered the "safe" figure.

Investment researcher Morningstar's 2026 estimate for a new retiree is 3.9%. For UK investors who face lower expected returns, higher charges, and potentially longer retirements, a realistic starting rate is around 3.7% to 3.9% rather than 4%.

That sounds like a small difference. It is not. At 4% you need 25× your income gap; at 3.7% you need about 27×. On a £20,000 income, that's roughly £40,000 more in your pot.

The deeper point is that no fixed percentage is guaranteed. A run of poor returns in the first few retirement years (sequence-of-returns risk) can cause lasting damage. That is why the cautious end of the range exists.

Treat 4% as the optimistic edge and 3.5–3.9% as the prudent planning figure.

The three things that move an expat's number

Here's where retiring abroad changes the calculation.

1- Your State Pension — a floor that shrinks the pot you need

Any reliable income reduces how much your savings must generate.

The full new UK State Pension is around £12,548 a year and counts as a dependable, inflation-linked floor if you retire somewhere it keeps rising.

That's the catch. In many countries, the State Pension is frozen and does not keep pace with inflation. Your pot then has to cover more of the load over time.

Whether your income floor rises or stalls can swing your target by six figures. It depends entirely on where you go. Read our frozen State Pension article to learn more.

2- Currency — the wobble domestic retirees don't have

If your pot and income are in pounds but your life is in euros, baht, or dirhams, exchange rates change your real spending power even if nothing else changes.

That extra volatility is a reason to plan with a bigger buffer and think about how you'll manage it instead of assuming today's rate will hold for 30 years. We cover the mechanics in our pieces on the cost of moving money and managing currency exposure.

3- Healthcare — a cost the NHS used to absorb

At home, healthcare is largely a given. Abroad, it often is not. Even if you can access a state system, private cover becomes more likely and costly as you age. That's a recurring cost to include in your target income, not an afterthought.

To those three, add a fourth if it applies: an earlier or longer retirement. Many people move abroad to retire sooner. The pot must last longer, pushing your safe withdrawal rate down and your target pot up.

The method, step by step

Putting it together, working out your number involves four steps:

1. Estimate your target annual income — the yearly spending your life abroad will cost, including housing, healthcare, and lifestyle.

2. Subtract your reliable income — the State Pension and any other guaranteed pensions, if they'll be uprated where you're going.

3. Divide what's left by your withdrawal rate — the income your savings must produce divided by (say) 0.04 for 4%, or 0.037 for a more cautious 3.7%. That's your target pot.

4. Add a buffer for the expat factors above — currency swings, healthcare inflation, and the risk that your State Pension is frozen.

A quick worked example. Suppose you want £30,000 a year. If your full State Pension is uprated where you retire, your pot only needs to fund the other ~£17,450. That is about £436,000 at 4% or closer to £472,000 at 3.7%.

If you retire somewhere your State Pension is frozen, you can't rely on it to keep pace. So, prudently, your pot may need to cover much more of that £30,000, pushing the figure well beyond £600,000. Same lifestyle, very different number, driven entirely by the factors above.

If the number looks daunting

A big figure on the screen can be discouraging, but several levers can bring it down. Most are within your control:

• Flexibility: A retiree willing to trim spending in poor market years can safely start withdrawing more than one who needs a fixed, unchanging income. Some research suggests a starting rate near 6% for the genuinely flexible. Building in the ability to flex is one of the most powerful ways to reduce the pot needed.

• A later or phased retirement: Working even part-time for a few years or retiring a little later does double duty. Your pot has longer to grow and fewer years to fund. Any reliable income you keep reduces what your savings must generate.

• Choosing a country where your State Pension keeps rising: An uprated State Pension is a dependable, inflation-linked income floor; retiring somewhere it stays frozen quietly raises the number your own pot has to hit.

• Protecting the pot from avoidable drains: Keeping investment charges low, holding a cash buffer to avoid forced sales in a downturn, and managing your currency conversions all help your savings last longer.

None of these replaces saving enough, but together they can move the target meaningfully. They are worth modelling before concluding the dream is out of reach.

A number is a starting point, not a verdict

Two honest caveats.

First, none of this is precise. Withdrawal rates are probabilities, not guarantees, and markets, inflation, and exchange rates will do things no calculator can predict. Second, flexibility is your friend. Retirees willing to trim spending in bad years can safely start higher than those who need a fixed income, so your appetite for adjusting matters as much as the maths.

The figure you land on is best treated as a target to plan towards and revisit, not a line you must hit exactly. Once you've got it, the natural next step is to test it against real places. Our companion guide on where you can afford to retire abroad shows how far that number stretches in different countries because the same pot buys a very different retirement in Lisbon than in Nice.

If you'd like help turning a rough number into a real retirement plan — factoring your pensions, the currency question and the country you have in mind — speak to Holborn Assets.