Foreign Estate and Situs Tax: What South African Investors Need to Check

The useful first step is an asset-by-asset classification, not selling every foreign holding or buying a policy because someone mentions a headline tax rate. This article focuses on US federal estate tax and UK inheritance tax, not US state-level death taxes. The wider questions of wills, executor access and family liquidity are covered in offshore estate planning.

In this article

Start with the owner, not the investment statement

Record citizenships, relevant residence history and the ownership arrangement. An individual's direct holding, a policy claim, a trust interest and a company's asset are not automatically treated alike.

US estate-tax residence has its own domicile concept. It is not necessarily the same as income-tax residence. A South African citizen who is also a US citizen, or whose circumstances raise US domicile questions, should not apply the nonresident rules below merely because the account shows a South African address. IRS Form 706-NA instructions, definitions

UK history matters too. Returning to South Africa does not by itself settle every UK inheritance-tax question. Establish the relevant history before deciding which assets need analysis.

An adviser cannot responsibly classify a household's entire foreign portfolio from a broker name and current postal address.

Does a non-US broker remove US estate-tax exposure?

Not by itself. For someone who is neither a US citizen nor US-domiciled for estate-tax purposes, the IRS's general rules treat shares in US-organised corporations as US-situated property even when held abroad or through a nominee. Treaty provisions can alter the result. Classify the owner and the asset before relying on the broker's location. IRS nonresident-estate guidance

For a decedent who was neither a US citizen nor US-domiciled for estate-tax purposes, the Form 706-NA filing test generally includes US-situated assets at death together with specified prior-gift amounts. The threshold is $60,000. That is a filing test, not a promise that the first $60,000 of every foreign account is exempt or that tax equals a fixed percentage above it. IRS instructions, “Who Must File”

The distinction between needing to file and ultimately owing tax matters. Treaty analysis and allowable deductions can affect the liability without making the administrative question disappear.

Two brokers do not create two thresholds

Consider an invented classification example, not an estate-tax calculation:

Assume the owner falls within the nonresident, noncitizen category and has no relevant prior gifts. Under the stated domestic starting rules, the $90,000 combined holding exceeds the $60,000 filing threshold even though each account is smaller. This is aggregation before any applicable treaty determination, not a calculation of tax payable.

No cash or fund holding has been silently assigned the same treatment. No treaty relief or tax due has been calculated. The technical calculation data preserves those limitations.

Splitting these same shares between custodians changes the statement layout. It does not change their assumed legal identity. Custody diversification can have another purpose, but it is not this tax analysis.

The same account value can contain different US-situs amounts

Now consider two other hypothetical $90,000 accounts belonging to an owner in the same assumed category. Under the IRS's general domestic location rules, verified stock in a non-US corporation is treated differently from US corporate stock. A qualifying US bank deposit not effectively connected with conducting a US trade or business is also treated as outside the US for this purpose. IRS instructions, Part V, “Stock” and “Deposits”

The final row assumes a genuine deposit with a qualifying bank, not money-market fund units or an unidentified broker balance. The middle row assumes direct corporate stock, not an unverified fund, depositary receipt or special structure. These examples exclude special expatriate and retained-interest transfer rules. Other assets, prior gifts and treaty analysis could change the complete filing or liability conclusion.

This is why a percentage of “offshore assets” cannot substitute for legal classification. The examples have identical balances but different identified US-situs amounts. They do not recommend replacing shares with deposits: that would also change investment exposure, income and risk. Nor does a non-US classification here establish exemption from another country's rules.

A fund's investment exposure is not its legal identity

A fund investing in US companies and a direct holding in those companies are different things to classify. Ask for the fund's legal name, domicile, legal form and share-class identifier. A ticker, exchange listing or dollar quotation alone is insufficient.

Likewise, establish what a cash balance actually represents. It could be a bank deposit, a sweep arrangement or fund units. A screen label saying “cash” does not identify which statutory rule or exclusion applies.

Use a short evidence file rather than a collection of reassuring marketing descriptions:

This is a document-request framework, not a tax classification engine. Leave uncertain holdings unclassified until the necessary evidence is obtained.

UK rules changed: old domicile-only explanations can mislead

From 6 April 2025, UK inheritance-tax treatment of overseas assets moved to a long-term residence framework. HMRC's general test looks at at least ten UK-resident tax years within the previous twenty. A continuing period after leaving can apply, with transitional rules and exceptions. A person's full history must be checked. HMRC long-term UK residence guidance

For someone outside that wider overseas-asset scope, UK assets can still matter. HMRC also identifies excluded categories and different rules for certain arrangements. “Anything held in London is taxed the same way” is not a defensible summary. HMRC guidance for someone based outside the UK

UK domestic law now uses long-term residence for this overseas-asset question. For the South African treaty, HMRC explains that a long-term UK resident is treated as UK-domiciled; ordinary residence in South Africa, nationality and relevant income-tax residence can also affect the treaty analysis. Neither an old domicile-only summary nor the new residence test alone completes that analysis. HMRC South African treaty guidance

A household with a UK residence history should therefore supply a dated timeline, not only the date on which it returned to South Africa. Do not rely on an old article's residence summary for a later death or transfer.

Treaties matter, but a treaty is not a blanket exemption

The IRS lists South Africa among its death-tax treaty partners and requires disclosure when a return position relies on a treaty. HMRC likewise identifies an inheritance-tax agreement with South Africa. These are death-tax agreements; a familiar income-tax treaty is not a substitute. IRS death-tax treaty instructions; HMRC double-taxation relief

The useful request is a written conclusion for the actual estate facts: which country can tax which property, what relief is available, how it is claimed, and which obligations remain.

Do not add headline rates from two countries and call the sum the expected tax. Equally, do not assume a treaty eliminates every return, payment, valuation or administrative delay. A numerical estimate should follow the classification and relief analysis.

Keep foreign tax separate from the South African estate

SARS describes estate duty by reference to worldwide property and deemed property for a person ordinarily resident in South Africa, subject to the applicable rules, deductions and relief. Foreign ownership is not itself an exclusion from that assessment. SARS Estate Duty

That produces separate workstreams: foreign liability and filing; South African estate treatment; and the practical route for assets or money to reach beneficiaries. An efficient nomination or administration process does not prove that no tax is due.

An offshore policy may change the legal asset held and how a beneficiary succeeds to it. It needs its own contract and jurisdiction analysis. Compare that option with direct ownership on costs, access and tax before acting, as explained in offshore endowment or direct investment.

What would a useful review produce?

The result should be a holdings schedule with a source for each classification, an owner-residence assessment, any treaty conclusion and a list of unresolved questions. It should identify who will handle filings and what documents the family can locate.

Before restructuring, add the cost of the change: any disposal tax, transaction charges, altered investment exposure, new access restrictions and continuing fees. A genuine foreign-estate issue does not prove that the first proposed product is the appropriate solution.

Retaining a holding can be reasonable when its exposure and administration are understood and funded. Changing the arrangement can be reasonable when the documented benefit justifies its consequences. Fear of a headline rate is not sufficient evidence for either choice.

Our priority is to replace an unclassified portfolio with a decision file. That is useful even if no investment changes.

For wider household coordination, a bounded Financial Clarity Review may help identify what remains unresolved. ClearGauge offers that paid service and has a commercial interest in review engagements. A US or UK estate-tax opinion, treaty claim or return requires the appropriate specialist; an educational review does not certify the liability.

Sources and scope

Researched 7 September 2026 using SARS, IRS and HMRC sources. The US discussion uses the September 2025 Form 706-NA instructions, including their distinction between domicile and income-tax residence. The UK discussion reflects the framework effective from 6 April 2025. Apply the rules and form edition relevant to the actual date of death or transfer.

This is a decision-preparation article, not a comprehensive treaty opinion, estate-tax estimate or recommendation to restructure. Citizenship, residence history, trusts, jointly owned assets, prior gifts and specialised instruments can require separate analysis.