The short answer

Financial planning for an international family means building a family budget in baht that survives a weaker pound; planning school and university fees years ahead — started early, investment growth can pay around 40% of the bill; protecting your partner and children with life cover, health cover and clear arrangements if you die or can't manage your affairs; understanding property rules, because a foreign partner can't own Thai land; supporting family in a way that's affordable and fair; checking tax and inheritance in both countries — including the UK cap on the spouse exemption where one partner isn't a long-term UK resident; and having wills and guardianship in place in both countries. Review it every year, and whenever the family changes.

What makes international families different

Most financial planning advice assumes a family where everyone shares the same nationality, lives in the same country and will inherit under the same law. International families break each of those assumptions, and that's where the risks — and opportunities — lie.

Different nationalities, different rights

A Thai partner can own land in Thailand; a British partner generally can't. A child with Thai nationality has rights here that a British parent doesn't. A Thai partner may face visa and income rules to live in the UK that a British partner doesn't. Your plan has to work for every member of the family under their own rules, not just yours.

Different currencies at different times

School fees, housing and daily life may be in baht; university in the UK, a pension and an inheritance may be in pounds. Each goal has its own currency and its own date, and the exchange rate in between can make a large difference.

Different family expectations

In Thailand, supporting parents is often seen as a duty, not a choice. In the UK, the expectation is often that parents help children rather than the other way round. Many international families do both at once. That's admirable — but it needs budgeting honestly, so that generosity today doesn't undermine your partner's or children's security tomorrow.

Different laws when someone dies

Inheritance tax, wills, probate and guardianship all work differently in the two countries. Without planning, a surviving Thai partner can face delays in reaching Thai assets, unexpected UK tax, or a will that simply doesn't work in Thailand.

The family plan at a glance

The eight areas every international family plan should cover. Each is explained below.

A framework for discussion. Talk it through as a family — it works far better when both partners understand the plan.

A family budget in two currencies

Start with what family life actually costs, in baht: housing, food, utilities, transport, school fees and extras, health insurance for everyone, help for parents, trips to the UK to see family, and savings. Then list your income and the currency it arrives in. If most of it is in pounds, convert it at today's rate and at a rate 10% worse. A family budget that only works at a good exchange rate is fragile — and families have less room to cut back than a single retiree.

Three habits make a big difference:

• Hold several months of family spending in baht, so a bad month for the pound never forces you to convert at a poor rate.
• Use a cheap, regular route for monthly family money, on the same date each month.
• Fix the rate for big, known costs — the school year's fees, a rental contract — so the pound can't move the price.

Make sure both partners can see the budget and reach the accounts. In many families one person handles all the money; if that person is suddenly unable to, the other needs to know where everything is and how to pay the bills.

Planning for international school fees

For families with children, school fees are often the single largest cost — larger than housing — and they run for many years. Planning them properly is one of the most valuable things you can do.

What school actually costs

Based on Bangkok schools' published 2026/27 fees, yearly tuition ranges from about ฿260,000 to ฿570,000 at budget schools, ฿220,000 to ฿800,000 at mid-range schools, and ฿540,000 to almost ฿1.2 million at the top schools. Once you add buses, lunches, uniforms, trips and exam fees, a realistic planning budget is about ฿550,000 a year per child at a budget school, ฿750,000–฿900,000 at a mid-range school and ฿1.15 million or more at a top school. Year one costs 25–30% more, because of one-off fees: registration, enrolment and development fees can run to ฿100,000–฿260,000, and many schools also ask for a refundable deposit.

The lifetime cost

Multiply it out and the numbers are striking. Two children at a mid-range school for twelve years each comes to about ฿19.8 million — roughly £446,000 at today's rate — before any rise in fees or university costs. Few families can pay that comfortably from income alone, which is why school fees need their own plan.

How to plan for it

1. Write the costs year by year for each child, from now until they leave school.
2. Allow for fee rises — schools usually increase fees most years.
3. Separate the money by horizon: next year's fees in cash, in baht; fees three to seven years away in steadier investments; fees further off can be invested for growth.
4. Fix the exchange rate for each year's fees if your income is in pounds.
5. Plan for university separately — UK, Thai or elsewhere — with its own currency and dates.
6. Protect the plan with life cover, so the children's schooling continues if you die.

Our team can help you plan school fees and find the right school. Ask about school-fee planning, or compare schools in our international schools directory.

Higher education fee planning: let growth pay part of the bill

Most families pay school and university fees out of income, year by year, as the bills arrive. That works — but it means every pound of the bill comes out of your pocket. Higher education fee planning turns that around. You start putting money aside years before the fees are due, invest it for growth, and let the investment returns pay a large part of the cost.

The numbers are powerful. Say you want £100,000 ready in thirteen years — for a child's secondary school years, or university in the UK. Saved in cash at no interest, that's about £641 a month. Invested in a plan growing at 8% a year after charges — the growth Lawrence's education plans typically aim for — it's about £366 a month. You pay in around £57,000; growth provides the other £43,000. That's roughly 40% of the cost paid by growth rather than by you.

Why starting early matters so much

Growth needs time. The same £100,000 goal costs far more each month the later you start, and growth does less of the work:

Monthly saving needed to reach £100,000, assuming 8% a year growth after charges. The bar shows the share of the goal paid by growth: 43%, 34%, 28% and 18%. Illustration only — growth isn't guaranteed and can be higher or lower.

The best time to start is when a child is born or starts primary school. The second-best time is now. Even a few years of growth makes a real difference — and a plan can be built to pay out exactly when each year's fees fall due, in the currency the school or university charges.

What a good education plan looks like

• Built around the dates — money ready when each school year or university term begins.
• Invested for growth early, then moved to safer holdings as fees get close.
• In the right currency — baht for Thai international schools, pounds for UK universities.
• Protected — with life cover so the plan continues if a parent dies.

Lawrence specialises in education fee planning for expat families in Thailand. A free chat will show you what your own children's schooling and university could cost, and how much of it growth could pay. Talk to Lawrence about education fee planning, or start by comparing international schools.

Where to start

A review of the whole family's finances, a better way to pay school fees and larger family transfers, and a cheap route for monthly family money.

Protecting your partner and children

In an international family, one partner's income often supports everyone — and if the main earner is the foreign partner, their death or serious illness can leave the family without income, without a visa sponsor and without easy access to money held abroad. Protection is the foundation the rest of the plan stands on.

Health cover for the whole family

Private healthcare in Thailand is excellent but can be expensive for a serious illness, a difficult birth or a child's accident. International health cover for the whole family, with maternity and children's cover where needed, is essential. Check what's covered in the UK if you travel back often.

Life cover

Life cover pays a lump sum if you die. For a family, the right amount is usually enough to clear any debts, pay the rest of the children's school fees and replace several years of income while your partner adjusts. Make sure the payout can reach your partner quickly, and that the policy is written so it doesn't add to your estate for inheritance tax where that can be avoided.

Income and illness cover

Serious illness can be as damaging financially as death, and lasts longer. Critical illness cover pays a lump sum on diagnosis of a serious condition; income protection replaces part of your income if you can't work.

If you can't manage your affairs

Think about who would run the family's finances if you were unable to — a lasting power of attorney in the UK, and suitable arrangements in Thailand. Make sure your partner knows where every account is and how to reach it.

We arrange health, life and protection quotes for families in Thailand. Ask our team for a family insurance quote.

Visa money: staying together

For a British partner married to a Thai national, a marriage-based (Non-O) extension is a common way to live in Thailand. The financial requirement is ฿400,000 in a Thai bank account, or a monthly income of ฿40,000, or a combination of the two. A deposit must usually be seasoned for two months before the first application and three months before each renewal. The British Embassy no longer issues income letters, so many people use the deposit route or show twelve months of regular transfers into their Thai account.

Treat that money as locked, not as savings or an emergency fund. Many families keep it in its own account so it's never accidentally spent. If the family might move to the UK in future, check the current UK family visa rules and minimum income requirement on GOV.UK well in advance, because they can affect where savings and income need to be.

Property: who owns the family home?

Property is where international families most often get into difficulty, because of a simple rule: foreigners generally can't own land in Thailand. A foreign partner can own a condo unit within the building's foreign quota, but a house on land is usually bought in the Thai partner's name.

That has consequences worth thinking through calmly, as a couple:

• When a Thai spouse buys land, the Land Office usually asks the foreign spouse to confirm in writing that the money is the Thai spouse's own. Understand what that means before you sign.
• Arrangements such as a registered lease or usufruct can give the foreign partner a recorded right to live in the home. Take independent legal advice on what suits your situation.
• A condo bought by the foreign partner needs the money to arrive from abroad in foreign currency, with the right bank paperwork, to count toward foreign ownership.
• Wills matter even more — so the home passes as you both intend if either of you dies.

None of this is a reason to avoid buying. It's a reason to agree the arrangements openly, put them in writing and take independent advice. Our guide to funding a Thai property purchase from overseas explains the payment side.

Supporting parents and relatives — sustainably

Helping parents and wider family is part of life for many Thai families, and for many British partners it's a source of real pride. The financial risk isn't generosity — it's open-ended generosity that grows year by year until it threatens the family's own security.

A few practical principles help:

1. Agree a regular amount as a couple and build it into the budget, rather than responding to each request separately.
2. Keep a separate fund for one-off needs — a hospital bill, a house repair — with a clear limit.
3. Prefer help that lasts — health insurance for a parent, school costs for a niece or nephew — over cash that disappears.
4. Be careful with loans to family; treat them as gifts unless you're genuinely happy to lose the money.
5. Protect your partner's future — support for parents shouldn't come at the cost of your own retirement or your children's school fees.
6. Write down large gifts, especially property, so everyone understands what was given and why.

On tax, Thailand has a gift tax, but most family support never comes close to it. Gifts from parents, children or a spouse are exempt up to ฿20 million in a calendar year, with 5% on the excess; customary gifts and support from others are exempt up to ฿10 million. In the UK, regular gifts out of surplus income and small yearly gifts can fall outside inheritance tax — worth knowing if UK inheritance tax still applies to you.

Tax and inheritance in two countries

International families face the same income tax rules as other expats — Thai tax residence at 180 days, and Thai tax on foreign income earned from 2024 onwards that's brought into Thailand. Our guide to receiving overseas income in Thailand explains them. Where families really differ is inheritance.

The UK spouse exemption — and its limit

Normally, anything left to a husband, wife or civil partner is free of UK inheritance tax. But since April 2025, if you're a long-term UK resident — broadly, UK resident for at least 10 of the previous 20 tax years, with the status lasting three to ten years after you leave — and your spouse is not, the spouse exemption is restricted, mirroring the old £325,000 cap. That's exactly the position of many British people married to a Thai partner who has never lived in the UK. The non-long-term-resident spouse can choose to elect to be treated as a long-term resident, which removes the restriction but brings their own worldwide assets into UK inheritance tax. It's a decision that needs proper advice.

Thai inheritance tax

Thailand's inheritance tax only applies to the part of an inheritance above ฿100 million, and spouses are exempt. Most families won't pay it, but larger estates should check.

Children's products

UK savings products for children, such as Junior ISAs, generally need the child to be UK resident, so many expat families save for children through their own investments or a separate account earmarked for each child. Keep clear records of what belongs to whom.

Wills and guardianship in both countries

If you do one thing after reading this guide, make sure your wills are in order — in both countries.

A UK will deals with UK assets: bank accounts, investments, property. A Thai will deals with Thai assets: bank accounts, a condo, a car. The two need to be drafted to work together, so one doesn't accidentally revoke the other. Without a Thai will, Thai assets pass under Thai rules of intestacy, often through a court process that can take months, while the family may need money urgently.

Guardianship matters just as much for families with young children. If both parents died, who would look after the children, and where would they live — in Thailand or the UK? Name guardians in your wills, discuss it with them, and make sure the arrangements work in the country where the children would actually be.

Finally, check every beneficiary nomination on pensions and life policies — they don't follow your will — and keep a "where is everything" file that your partner can read, in a language they're comfortable with.

A worked example: Tom and Ploy

Tom is 46 and British; Ploy is 39 and Thai. They live in Bangkok with two children, aged 6 and 9, who hold both nationalities. Tom works remotely for a UK company, paid in pounds. Ploy's parents live in Khon Kaen, and Tom has a 19-year-old daughter at university in Leeds. All figures are illustrations at ฿44.38 = £1.

Budget. Family life costs about ฿180,000 a month — about £4,060. They stress-test it at a pound 10% weaker and keep four months' spending in baht as a buffer.

School fees. Both children are at a mid-range international school. Including extras, that's about ฿1.65 million a year — about £37,000. They plan each year's fees ahead, fix the rate for each school year with a forward contract, and start an education plan for university, invested for growth, while the children are still young enough for growth to pay a large share.

Protection. Family health cover, and life cover on Tom large enough to pay the rest of both children's schooling and several years of family spending. Critical illness cover too, because the family depends on his income.

Visa money. ฿400,000 in its own Thai account for Tom's marriage extension, never touched.

Property. They're thinking about buying a house. They take independent legal advice, agree a registered arrangement giving Tom the right to live there, and update both wills first.

Family support. A fixed ฿15,000 a month to Ploy's parents, plus health insurance for her mother, and a monthly allowance to Tom's daughter in the UK.

Inheritance. Tom lived in the UK for over 30 years and left four years ago, so he's still within the UK inheritance tax tail. Ploy has never lived in the UK, so the spouse exemption is restricted. They take advice on whether an election, life cover written in trust or other planning makes sense.

Wills. UK and Thai wills that work together, guardians named for the children, and pension nominations split between Ploy and his daughter as he intends.

It's a complicated family — but not a complicated plan. Each piece has a clear owner, a currency and a date.

The family finance mistakes we see most often

1. Not planning school fees until the first bill arrives — and paying them at whatever rate the bank offers.
2. No life cover on the partner whose income pays for everything.
3. One partner knowing nothing about where the money is or how to reach it.
4. Buying land without clear arrangements or independent advice for both partners.
5. Open-ended family support that slowly erodes the family's own security.
6. Assuming the UK spouse exemption fully protects a Thai partner.
7. Having only a UK will, leaving Thai assets to a slow court process.
8. No guardians named for young children.

Questions to talk through as a family

The best family plans come from honest conversations. These questions are a good place to start.

• Where do we want to live in ten and twenty years — here, the UK, or both?
• What kind of schooling do we want, and can we afford it to the end?
• How much can we give our parents without risking our own future?
• Who owns what — and is everyone happy with that?
• What happens if one of us dies or can't work?
• Does each of us know where every account and document is?

Keeping the family's finances secure

Family finances often mean several people using shared accounts and devices, often on home and school Wi-Fi. A few habits keep everyone safe:

• Use a family password manager so both partners can reach important accounts safely.
• Turn on two-factor sign-in on every bank and investment account.
• Use a private, protected connection on hotel, café and shared Wi-Fi.
• Teach children and relatives to recognise scam calls and messages.

How we researched this guide

We used Thailand Starter Kit's guide to international school fees, based on schools' published 2026/27 fee schedules (4 August 2026); Emerhub's 2026 guide to the Thai marriage visa; Nishimura & Asahi on Thailand's gift tax; Forvis Mazars on Thailand's Inheritance Tax Act; Tax Adviser magazine on the UK's long-term residence test and the spouse exemption; HaysMac on UK residence-based inheritance tax; and our own guides to receiving overseas income and funding a Thai property purchase. Worked examples use ฿44.38 = £1 (Wise, 12 October 2026) and are illustrations. Checked 13 October 2026. This guide is general information, not personal financial, tax or legal advice — rules change and individual circumstances differ.