Cross-border financial planning is the work of managing money, tax, investments, and estate matters across more than one country at once. It applies to a growing group of South Africans — those earning abroad who still think of home as home, those who’ve settled in South Africa with income and assets elsewhere, and those who simply want a meaningful slice of their wealth outside a single economy and currency.
The opportunities are real: access to global markets, diversification away from a single political and economic outlook, and in some cases more favourable tax treatment. So are the complications. Tax residency rules, double-tax agreements, foreign inheritance taxes, forced-heirship laws, and the cost of moving money between jurisdictions can quietly erode the benefit if they’re not planned for deliberately.
This guide sets out how each of those pieces fits together. If your situation centres on returning to South Africa after years abroad, read it alongside our companion guide on financial planning for South African expats, which goes deeper on the practicalities of coming home.
- Key Definitions
- Who Cross-Border Planning Is For
- What It Actually Involves
- Tax Residency: The Question Everything Hinges On
- Building a Global Investment Base
- Estate Planning Across Borders
- Currency and Moving Money
- The Returning-Home Question
- Common Cross-Border Mistakes
- Frequently Asked Questions
- Planning for a Life Lived in More Than One Place
Key Definitions
Tax residency
The status that determines whether South Africa taxes you on your worldwide income or only on income sourced in South Africa. It is decided by two tests, not by citizenship or where you happen to be living.
Physical Presence Test
An objective, day-counting test. You are a tax resident if you are present in South Africa for at least 91 days in the current year and in each of the preceding five years, and for at least 915 days in total over those five years. [VERIFY: current thresholds]
Ordinarily Resident Test
A subjective test based on intent. If South Africa is the home you return to after your travels — your “real home” — SARS may treat you as a tax resident even if you fail the day-count test.
Double Tax Agreement (DTA)
A treaty between two countries that decides which one has the right to tax a given type of income, preventing the same income from being taxed twice.
Situs tax
Estate or inheritance tax levied by a country because an asset is deemed located there — regardless of where the owner lives. US shares and UK property are common triggers.
Deemed domicile
A UK concept under which long-term residents are treated as UK-domiciled for inheritance tax, exposing their worldwide estate to UK IHT. Relevant for UK expats living in South Africa.
Forced heirship
Laws in many civil-law jurisdictions (much of Europe) that reserve fixed portions of an estate for specific heirs, overriding the wishes set out in a will.
Financial emigration
The formal process of ceasing South African tax residency. It can trigger a deemed capital gains disposal (“exit tax”) and changes how your income and assets are taxed thereafter.
Who Cross-Border Planning Is For
“Cross-border” sounds like it belongs to a small, jet-setting minority. In practice it describes a large and growing group of South Africans whose financial lives no longer fit inside one set of borders. Most fall into one of three categories.
| Who | Situation | Primary concern |
|---|---|---|
| South Africans living abroad | Working in Dubai, the UK, across Africa, Europe or Asia to maximise earnings — but South Africa still feels like home, and a return is on the cards | Tax residency on return, repatriating capital, keeping retirement provision intact |
| Expats living in South Africa | Mostly from the UK and Europe; income and asset base in pounds or euros, but a home and a life here | How foreign pensions are taxed, deemed domicile back home, funding a rand lifestyle from foreign assets |
| South African diversifiers | Staying in South Africa, but wanting wealth spread across markets and currencies through offshore investments or property | Offshore allowances, situs tax on direct holdings, the right structure |
The thread running through all three is the same: more than one country has a claim on your tax, your estate, or your currency — and the rules of each rarely line up neatly with the others.
What It Actually Involves
At its simplest, cross-border financial planning is the work of making the financial laws and opportunities of two or more countries work together rather than against each other. It pulls in four areas that are usually handled separately: investments, tax, estate planning, and the mechanics of moving money.
The reason it’s worth doing carefully is that the benefits and the pitfalls live close together. Global diversification can reduce risk and broaden opportunity. Some jurisdictions offer genuinely efficient ways to hold investments. But foreign tax compliance, currency movements, and unfamiliar inheritance laws can each take a bite out of the result if they’re treated as afterthoughts. The point of planning is to capture the upside while keeping those frictions small and predictable.
Tax Residency: The Question Everything Hinges On
Almost every cross-border decision traces back to one question: where are you tax resident? South Africa taxes residents on their worldwide income and non-residents only on income sourced here. So your residency status decides whether your foreign earnings, interest, and dividends are within SARS’s reach at all.
Critically, residency is not about citizenship or even where you spend most of your time. It’s decided by two tests.
| Test | What it measures | How it’s triggered |
|---|---|---|
| Physical Presence | An objective count of days in South Africa | 91 days in the current year, 91 days in each of the prior five years, and 915 days cumulatively over those five years [VERIFY] |
| Ordinarily Resident | Your intent and ties — whether SA is your “real home” | Subjective. Can apply even if you fail the day-count test, if South Africa remains the home you return to |
The ordinarily resident test is the one that catches people out. You can spend most of the year abroad and still be treated as ordinarily resident if your life — family, property, the place you return to between contracts — clearly centres on South Africa. For anyone running a “global citizen” arrangement, spending part of the year here and maintaining residency elsewhere, the documentation matters: consistent ties to another jurisdiction, and clear evidence of intent, are what protect you from an unintended residency finding.
Two further pieces complete the picture. Double Tax Agreements determine which country has the taxing right over a given income stream, so a foreign pension may be exempt in South Africa under the relevant treaty. And for UK expats living here, the UK’s deemed domicile rules mean your worldwide estate can stay within reach of UK inheritance tax long after you’ve left. Neither is something to assume your way through; both reward specific advice.
Building a Global Investment Base
For anyone with the means, holding part of your wealth offshore is less a luxury than a sensible defence. It reduces your exposure to a single economy, market, and currency — and for South Africans, that diversification carries particular weight given the rand and the local outlook. But even if your base is a “stable” economy, concentration in any one country is still concentration.
Building that base well involves more than buying a global ETF. It means thinking about asset allocation across regions, the political and economic climate of where you invest, and the structure you hold investments in. Tax-neutral jurisdictions such as the Channel Islands are often used to house investments cleanly, and the right wrapper can make ongoing tax compliance far simpler. The mechanics of doing this properly — allowances, structures, and the false comfort of “diversification” that’s really just more of the same — are covered in our offshore investing guide, and the container question specifically in our guide to offshore investment wrappers.
Estate Planning Across Borders
Estate planning is where cross-border complexity bites hardest, because assets in different countries are governed by different inheritance laws and taxes — and those rules can override the wishes set out in a single South African will.
| Where the asset sits | The risk | Key figure |
|---|---|---|
| US-situs (US shares, US property) | US federal estate tax for non-resident aliens — those Google or Amazon shares count | ~US$60,000 exemption, then rates up to 40% [VERIFY] |
| UK-situs (UK property, UK shares) | UK inheritance tax on the UK estate | £325,000 nil-rate band, 40% above it [VERIFY] |
| Civil-law jurisdictions (much of Europe) | Forced heirship reserves fixed shares for certain heirs, overriding your will | A jurisdiction-specific will is usually needed |
| South African estate | Estate duty on the dutiable estate | R3.5m abatement; 20% up to R30m, 25% above [VERIFY] |
Three principles follow. First, you generally need a will for each jurisdiction in which you own assets — particularly property — drafted so the documents complement rather than contradict each other. Second, situs taxes on US and UK assets need to be factored in before death, not discovered after it. Third, your estate needs enough liquidity to settle these taxes, executor’s fees, and probate without forcing a fire-sale of assets. Structuring tools help: discretionary trusts can address intergenerational transfer and some situs exposure, and the broader framework sits within ordinary estate planning in South Africa. This is specialist territory, and it’s worth bringing in cross-border legal and tax expertise alongside the planning.
Currency and Moving Money
Currency movements can swing the value of your international assets and income as much as the underlying investments do. But the more immediate, and more controllable, issue is the cost of moving money between South Africa and the rest of the world.
Banks tend to make a substantial margin on foreign exchange, and on large transfers that margin adds up quickly. Using a specialist forex provider rather than defaulting to your bank is one of the simplest ways to keep more of your own money — the transfer is just as seamless, and the rate is materially better. For anyone moving meaningful sums across borders regularly, it’s worth getting this right rather than leaving it to chance.
The Returning-Home Question
For South Africans abroad, the most consequential planning happens before the move home, not after it. Ceasing South African tax residency — financial emigration — can trigger a deemed disposal of certain assets for capital gains purposes, so the timing and sequencing matter. Equally, returning and re-establishing residency changes how your foreign income and assets are treated from that point on.
Getting the structure right before you move tends to save the most. That includes how and when to repatriate offshore capital, what to keep abroad, how to re-establish medical cover and risk benefits, and how your foreign retirement provision interacts with the South African system. We cover the return journey in detail in our guide to financial planning for South African expats.
Common Cross-Border Mistakes
Most cross-border problems come from a handful of avoidable assumptions:
- Assuming that leaving ends your tax residency. The ordinarily resident test can keep you a South African tax resident long after you’ve physically gone. Residency has to be ended deliberately, not by absence alone.
- Holding US or UK situs assets directly without considering estate tax. A direct holding of US shares can expose your estate to US estate tax above a low threshold — often solved by holding through the right structure instead.
- Relying on one will for assets in several countries. Forced-heirship rules and foreign probate can frustrate a single will. Separate, coordinated wills are usually needed.
- Letting your bank handle large foreign exchange transfers. The margin is rarely visible and rarely small.
- Planning the return home after the move rather than before it. The most valuable decisions — around exit tax and capital repatriation — have to be made while you’re still on the right side of the residency line.
Frequently Asked Questions
Am I still a South African tax resident if I live and work abroad?
Possibly. South Africa applies two tests. Even if you fail the day-count (physical presence) test by spending little time here, you can still be "ordinarily resident" if South Africa remains your real home — the place you return to. Ending tax residency is a deliberate process, not an automatic result of leaving.
Will I be taxed twice on my foreign income?
Usually not. Double Tax Agreements between South Africa and other countries decide which country has the right to tax a given income stream, preventing the same income being taxed in both. Some income, such as certain foreign pensions, may be exempt in South Africa under the relevant treaty.
Do I need a separate will for assets in another country?
Generally yes, especially for foreign property. Different countries apply different inheritance laws — including forced heirship in much of Europe — and foreign probate can be slow. Separate wills for each jurisdiction, drafted to complement each other, usually give the cleanest outcome.
Can my offshore investments be taxed when I die, even though I live in South Africa?
Yes. Some assets attract estate or inheritance tax based on where they sit, regardless of your residence. US shares and UK property are common triggers — US estate tax can apply above roughly US$60,000, and UK inheritance tax above the £325,000 nil-rate band. The right holding structure can reduce or remove this exposure.
What is financial emigration, and do I need to do it?
Financial emigration is the formal ending of your South African tax residency. It can trigger a deemed capital gains disposal on certain assets, so timing matters. Whether it's right for you depends on your plans — it isn't automatic and isn't always necessary. It's a decision to make with advice, ideally before you leave.
Planning for a Life Lived in More Than One Place
Cross-border financial planning isn’t really about any single country’s rules. It’s about the seams between them — the points where tax residency, currency, investment structure, and inheritance law meet and, left unattended, work against each other. Get those seams right and a global life becomes a genuine advantage: broader opportunity, real diversification, and resilience against any one country’s troubles.
The mistakes are almost always the same, and almost always avoidable: assuming absence ends residency, holding foreign assets in the wrong structure, relying on one will for several countries, and leaving the big decisions until after a move rather than before it. None of these is difficult to plan for. They’re just easy to overlook when no single adviser is looking at the whole picture.
That whole-picture view is the point. Wherever you sit — abroad and weighing a return, settled here with assets elsewhere, or simply building globally from home — the value comes from coordinating tax, investment, and estate planning together, across borders, rather than solving each in isolation. That coordination is what a proper financial plan is built to provide.
If your money, your family, or your plans straddle more than one country, we’re happy to map out where the seams are — tax residency, currency, structure, and estate — and what’s worth doing before any move. We bring in cross-border legal and tax specialists where it’s needed, so the whole picture is covered, not just the investment piece.
This article is for informational purposes only and does not constitute financial advice. Henceforward (Pty) Limited is an authorised representative of Graviton Wealth Management (FSP 8772). Tax figures referenced are indicative — verify current rates and thresholds at sars.gov.za before making any decisions. Situs tax thresholds and rules are subject to change and vary by jurisdiction. Exchange control allowances are subject to SARB policy. Consult a qualified tax or legal advisor for advice specific to your circumstances.
Steven has been in the financial services industry since 2003 and launched Henceforward with Carl-Peter Lehmann in 2021. He focuses primarily on financial planning and client relationships. Henceforward is a fee-only, flat-fee firm — no commissions, no product incentives.