The short answer

Your time horizon is how long until you need the money. Short-term money — needed within about two years — belongs in cash, in the currency you'll spend it in, because there's no time to recover from a fall. Medium-term money — roughly three to seven years — can take some risk, usually through a mix of bonds and shares. Long-term money — eight years or more — usually belongs mainly in a diversified spread of shares, because over long periods they have usually beaten cash and inflation. Most people have all three at once. Retirement isn't the end of your horizon: at 65, it may be twenty or thirty years away. And because the State Pension is frozen in Thailand, your long-term money has to grow.

What a time horizon actually is

A time horizon is simply the length of time between investing money and needing to spend it. If you're saving for a condo you plan to buy in three years, that money has a three-year horizon. If you're investing for income in your eighties, that money might have a twenty-year horizon.

Three ideas make horizons more useful than they first sound.

You have several horizons, not one

People often talk about "my" time horizon as if they had one. In practice, nearly everyone has money with different horizons at the same time: an emergency fund that might be needed tomorrow, a visa deposit that's locked for a year, savings for a purchase in a few years, and retirement money that must last decades. Each of those pots deserves its own approach.

A horizon is when you spend it, not when you retire

A common mistake is to treat the day you retire as the end of your horizon. But you don't spend your whole retirement savings on that day. You draw it down over many years — some of it next year, some of it in twenty years. A 60-year-old's retirement savings therefore contain money with horizons of one year, ten years and twenty-five years, all at once.

Horizons shrink as time passes

Money that's ten years from being spent today will be five years away in five years' time. So the right home for each pot changes gradually. A plan that's right today needs adjusting as horizons shorten — something we come back to later in this guide.

Why time changes the risk of investing

Shares go up and down, sometimes sharply. Over a single year, they can easily fall by a fifth or more. But over longer periods, the ups have historically outweighed the downs, and the chance of ending up behind cash shrinks the longer you hold.

The long-running Barclays Equity Gilt Study, using 123 years of UK data, found that UK shares beat cash in about 70% or more of two- to five-year periods — and in 91% of ten-year periods. More recent figures tell a similar story: from December 2000 to August 2026, even after a 0.2% yearly charge and compared with the best savings rates available, UK shares beat cash in 91% of rolling ten-year periods and global shares in 90%.

How often shares have beaten cash

The longer the holding period, the more often shares have come out ahead. These are historical frequencies, not promises — but they show why time is an investor's biggest ally.

Share of periods in which shares beat cash. First two: Barclays Equity Gilt Study 2023, 123 years of UK data, as reported by Schroders. *December 2000 to August 2026, after a 0.2% yearly charge, against the best savings rates available (MoneyWeek, 28 September 2026). Past performance is not a guide to the future.

The flip side matters just as much: over two years, shares have lost to cash roughly three times in ten. If you'll need the money that soon, that's far too high a chance of being forced to sell after a fall. Time doesn't remove risk — but it changes which risk matters. Over short periods, the risk is volatility: a fall just when you need to sell. Over long periods, the bigger risk is often not growing enough to keep up with inflation.

How long is retirement, really?

Most people underestimate how long their money needs to last. According to the Office for National Statistics' life tables for 2022 to 2024, a 65-year-old in the UK can expect to live, on average, another 18.7 years for a man and 21.2 years for a woman.

Two things make the real horizon longer still. First, those are averages, so roughly half of people live longer — and planning to run out of money at the average age means a coin-toss chance of running out while you're still alive. Second, if you're part of a couple, the money usually needs to last until the second of you dies, which on average is later than either of you alone. Many planners therefore assume money must last into the early-to-mid nineties.

So a 60-year-old moving to Thailand isn't investing for a short retirement. A sensible plan assumes thirty years or more. That's why it's usually a mistake to put all of a retirement pot into cash or "safe" investments at the point of retiring: a large part of it is long-term money, and it needs to be invested like long-term money.

The three horizons and what suits each

A simple framework for matching money to time. The boundaries are guides, not rules — your own split depends on your income, goals and comfort with ups and downs.

Short-term money is about certainty; long-term money is about growth.

How to match your money to your horizons

Matching is a simple process. You don't need special software — a list and a calculator will do.

1. List your goals with dates — the visa deposit now, a condo in four years, help with a grandchild's university in nine, retirement income every year after that.
2. Put a cost on each, in the currency you'll pay it in.
3. Work out your yearly income gap — spending minus guaranteed income such as pensions and rent.
4. Allocate money to the short horizon first: emergency fund, locked visa money and about two years of the income gap.
5. Allocate the medium horizon: purchases due in three to seven years, plus the income gap for those years.
6. Everything else is long-term — invest it for growth, and plan to move some of it into the medium pot as time passes.

Many people are surprised by the result. Once the short and medium pots are properly funded, they often find they can afford to invest the rest for growth with real confidence — because a market fall no longer threatens their next few years' spending. That's the point: the short and medium pots are what let the long-term pot do its job.

Our guide to building an international financial plan shows the same idea as a "three pots" structure, step by step.

School and university fees: the classic long horizon

Education is one of the clearest examples of why horizons matter. Fees for a child who is three today won't be due for years — long enough for that money to be invested for growth rather than left in cash. Saving monthly for thirteen years with growth of 8% a year, around 40% of the goal can come from investment returns rather than your own pocket. Then, as each year's fees get close, the money moves into safer holdings and into the currency the school charges.

Where to start

A review to match your money to your real timescales, a specialist for moving money between pounds and baht as each horizon arrives, and a cheap route for everyday money.

Sequence risk: why the first years of retirement matter most

Once you start drawing an income from your investments, a new risk appears. It's called sequence risk, and it explains why the same average return can leave two retirees in very different places.

When you're taking money out each year, a market fall early on does lasting damage: you're selling investments at low prices to fund your spending, so fewer of them are left to benefit from the recovery. The same fall late in retirement does much less harm, because by then there's less money invested and less time for it to matter.

Same returns, different order

Two retirees each start with £300,000 and take £15,000 at the start of every year. Over ten years, both get exactly the same ten yearly returns — just in opposite order.

Illustration only. Years three to eight are up 8% for both. Same average return, about £90,000 difference — purely because of the order.

How time horizons protect you from sequence risk

The best defence against sequence risk is exactly the horizon structure described above. If the next two years of spending are in cash, and the following few years in cautious investments, a bad year for shares doesn't force you to sell them. You spend from cash, wait for markets to recover, and refill the cash pot from your growth investments in a good year.

• Hold one to two years of spending in cash at the start of retirement.
• Keep the next few years in steadier investments such as bonds.
• Refill from growth in good years, not bad ones.
• Be willing to trim spending a little after a big fall early in retirement.

Inflation, a frozen State Pension and the long horizon

Over a short horizon, inflation barely matters. Over a long one, it's the biggest threat to your spending power — and for British expats in Thailand, it's sharpened by the fact that the UK State Pension is frozen here. It's paid at the same amount year after year, while prices rise around you.

The chart at the top of this page shows what that means. With prices rising 2.5% a year, £10,000 of income that never rises is worth about £7,800 in today's money after ten years, and about £6,100 after twenty. A retiree who arrives at 66 and lives to 90 could see a frozen pension lose around 45% of its buying power.

That's why "playing it safe" with long-term money can be the riskiest choice of all. Cash in a Thai bank, with the Bank of Thailand's policy rate at 1.00% in August 2026, is unlikely to keep up with inflation over twenty years. Long-term money usually needs to be invested for growth so that, as the frozen pension shrinks in real terms, other income can fill the gap.

Currency and horizon go together

For an expat, every horizon also has a currency question. The general rule is that the shorter the horizon, the more closely the currency should match your spending.

Short-term money you'll spend in Thailand should mostly be in baht already. A 10% move in the pound over a year can easily happen, and if your next year's rent is in pounds, that move comes straight out of your budget. Medium-term money for a known baht cost — a condo, school fees — can be converted gradually, or have its rate fixed in advance with a forward contract, so a fall in the pound doesn't change the price. Long-term money can stay international: a global share fund is spread across many currencies, which itself reduces dependence on the pound, and there's time for currency swings to even out.

There's a trade-off. Pound cash currently earns more interest than baht cash — the Bank of England's rate was 3.75% in September 2026, against 1.00% in Thailand — so converting long before you need to costs you interest. The answer is usually to convert in step with your horizons: as money moves from the long pot to the medium pot, and from the medium pot to the short pot, that's the natural moment to move it into baht.

Keeping your horizons up to date

Because horizons shorten every year, your investments need gentle, regular adjustment. Two simple habits do most of the work.

Refill the pots once a year

Each year, move a year's worth of money from the medium pot into the short pot, and from the long pot into the medium pot. Do it from whichever investments have done best — in a good year for shares, take it from shares; in a bad year, take it from bonds or cash and leave the shares to recover.

Rebalance back to your plan

Markets will pull your mix away from your plan: after a strong run, you'll own more shares than you intended; after a fall, fewer. Rebalancing — selling a little of what has grown and buying what has fallen — keeps your risk where you meant it to be, and quietly makes you buy low and sell high.

Revisit after life changes

A new relationship, a health diagnosis, a decision to buy rather than rent, a child's plans changing, a decision to return to the UK — any of these can change your horizons overnight. When life changes, redo the list of goals and dates.

A worked example: Linda's three horizons

Linda is 62, single, and has lived in Pattaya for two years. She has £320,000 of savings and investments, a small workplace pension paying £6,000 a year, and her State Pension will start at 67. She spends about ฿70,000 a month. Figures are illustrations at ฿44.38 = £1.

Her yearly gap. ฿70,000 a month is about £18,900 a year. Her workplace pension covers £6,000, so her investments need to provide about £12,900 a year until 67. After that her State Pension narrows the gap — but it will be frozen, so the gap will slowly widen again.

Short horizon (0–2 years): about £45,000. Her ฿800,000 visa deposit (about £18,000), an emergency fund of four months' spending (about £6,300), and two years of her income gap (about £25,800), less what she already holds in baht. Held in Thai deposits and some pounds in cash.

Medium horizon (3–7 years): about £65,000. The income gap for years three to five, then the smaller gap once her State Pension starts, plus a reserve for a new car. Held in bonds and a cautious mixed fund.

Long horizon (8+ years): about £210,000. Everything else, in a low-cost global share fund. This is the money that has to keep up with inflation over what could be a thirty-year retirement — and the money she'll eventually leave to her nephew.

Before the review, Linda had almost everything in cash, worried about markets. Now she can see that a 25% fall in shares wouldn't touch her next seven years of spending — so she can leave her long-term money invested through the bad years. Each year, she'll refill her short pot from whichever investments have done best.

Time horizon mistakes to avoid

1. Treating retirement day as the end of your horizon, and moving everything into cash.
2. Investing short-term money in shares — the visa deposit, next year's rent, a condo deposit.
3. Planning to the average life expectancy instead of a long life.
4. Forgetting the State Pension is frozen, so the long-term gap grows.
5. Selling long-term investments after a fall because short-term money wasn't set aside.
6. Converting everything to baht at once instead of in step with your horizons.
7. Never refilling or rebalancing, so your risk drifts away from your plan.
8. Buying a product with a lock-in longer than your horizon for that money.

Questions to ask about your own horizons

Work through these once a year, or whenever something big changes.

• What will I need to spend in each of the next few years, and in which currency?
• Is the next two years' spending already in cash, mostly in baht?
• Could a 25% fall in shares force me to sell?
• Is my long-term money growing faster than inflation?
• Does any investment lock my money up for longer than I can afford?
• Have my plans changed — a purchase, a move, a family need?

Keeping your accounts secure

Long-term investments need protecting for a long time too. Managing accounts in two countries from phones and shared Wi-Fi means a few habits are worth building now:

• Use a password manager and a different strong password for every account.
• Turn on two-factor sign-in wherever it's offered.
• Use a private, protected connection on hotel, café and condo Wi-Fi.
• Never act on unexpected calls or emails about your investments.

How we researched this guide

We used the Barclays Equity Gilt Study 2023 figures on how often UK shares have beaten cash, as reported by Schroders (3 July 2023); MoneyWeek's analysis of rolling ten-year periods from December 2000 to August 2026 (28 September 2026); the Office for National Statistics' National life tables for the UK, 2022 to 2024; GOV.UK's guidance on the State Pension abroad; and the Bank of England's September 2026 and Bank of Thailand's August 2026 rate decisions. The inflation and sequence-of-returns examples are simple illustrations, not forecasts; the worked example uses ฿44.38 = £1 (Wise, 12 October 2026). Checked 13 October 2026. Past performance is not a guide to the future. This guide is general information, not personal financial advice.