How equity compensation creates concentration risk for expats and what to do about it

Many expat professionals spend years building wealth through diversified portfolios, superannuation, US retirement accounts and property. But when it’s time to map out their actual exposure, they’re genuinely surprised. Adding equity compensation alongside everything else often gives quite a different picture than they expect.

Restricted Stock Unit (RSUs) vest each year, Employee Stock Purchase Plan (ESPP) shares accumulate at a discount and there’s usually a reasonable case for holding each time. Maybe it’s that the company has performed well, selling feels premature or the tax seems easier to defer. But over time, a position that started as an employee benefit can become one of the largest exposures on the balance sheet. You end up with a single stock, linked to the same employer whose salary and career prospects are already central to the household's financial life.

This is the concentration problem. And for those with financial lives spanning Australia and the United States, it tends to carry tax, currency and cross-border planning dimensions that make it more complex than it first appears.

The correlated risk that is easy to underestimate

The issue with concentrated employer stock is not usually that the company is a poor investment. It is that the concentration it creates would rarely be chosen if the same capital had been received in cash. Most people, handed a bonus, would not put it all into a single stock. But that is effectively what happens when RSUs vest and the default is to hold.

For expats, this can be compounded in ways that are easy to miss. A US-listed technology company may already appear in global equity portfolios, US retirement accounts and Australian superannuation with international exposure. Once employer stock is added on top, the portfolio is often far less diversified than the headline numbers suggest. When the employer has a difficult year, the impact can be felt across income, equity and investment returns simultaneously.

Why the timing of decisions matters as much as the decisions themselves

RSUs and ESPPs also introduce a layer of tax complexity that is worth understanding before any sell decisions are made, rather than after.

RSUs are generally taxed as employment income at vesting, with later gains or losses falling into the capital gains regime on sale. In Australia, employee share scheme rules can apply differently depending on residency status at the time the taxing point arises. ESPPs add further nuance as the treatment of the purchase discount and the eventual gain can differ. For US taxpayers, the outcome varies depending on whether the plan is qualifying and whether a disqualifying disposition occurs.

The issue for cross-border clients is that Australia and the US may not tax the same benefit in the same year or characterise it in the same way. That timing mismatch affects foreign tax credit outcomes, cash-flow planning and the after-tax economics of holding or selling. The US–Australia tax treaty provides relief from double taxation but does not remove the need for careful, fact-specific analysis.

Residency changes add another dimension. ATO guidance indicates that RSUs vesting while a person is a non-resident of Australia may be treated differently from those vesting during Australian tax residency. Where someone becomes an Australian tax resident while already holding foreign assets, Australia may also provide a market value cost base reset for certain non-real-property assets, which can be a serious consideration for planning future disposals.

The implication of this is that a planned move between the US and Australia is not just a lifestyle decision. For anyone with unvested equity compensation, the timing of the move, the expected vesting schedule and the likely sale timeline should all be modelled before the move, not worked through afterwards.

From default to deliberate

There is no single approach that suits every situation, but several considerations tend to come up consistently.

Treat vesting events as income, not investment decisions

One useful frame is to ask what would happen if the vested shares had instead been paid as a cash bonus. Most people would not choose to redeploy that cash into more of their employer's stock. Applying that same logic to RSUs often supports selling some or all vested shares promptly and reallocating into a more diversified portfolio.

Build a staged sell-down plan

Where the existing position is already large, an immediate full sale is rarely the right answer. Developing a clearly documented, multi-year plan to reduce the holding gradually can manage concentration risk, smooth market-timing decisions, manage tax brackets and give clients a clear framework for future decisions rather than leaving each vesting event as an open question.

Coordinate the timing of sales with residency and tax position

For cross-border clients, when shares are sold matters as much as how many. Planned disposals should be assessed in light of Australian residency status, expected US tax obligations, available foreign tax credits and how the treaty framework applies. Getting the sequencing right can make a meaningful difference to after-tax outcomes.

In practice, this often means modelling different sale scenarios before making major moves, rather than reacting after the fact.

Manage currency exposure deliberately

US employer stock introduces USD exposure. For some clients, that aligns well with future spending and retirement plans. For others, where lifestyle costs, property or family commitments are primarily in AUD, it can create an unintended currency position. Proceeds from a sell-down can be redeployed in a way that better matches the currency mix of the portfolio to actual future needs.

Review estate and succession implications

For non-US persons, or those with shifting domicile profiles, holdings in US corporate shares can raise US estate tax considerations. Even where current exposure is modest or treaty relief may be available, concentrated equity positions should be reviewed alongside wills, trust structures, beneficiary arrangements and family succession planning.

See the holding in the context of the whole portfolio

The right decision on RSUs and ESPPs cannot be made by looking only at those shares. The more useful question is how they fit alongside superannuation, retirement accounts, property, cash and other investments, and whether the overall balance sheet, across both jurisdictions, reflects an intentional strategy.

The real planning opportunity

For many expat clients, the risk is not making a catastrophically wrong decision. It is that the default ‘hold, defer, revisit later’ position gradually produces an outcome that would not have been chosen if the whole picture had been visible from the start.

The more effective approach connects investment strategy with tax, residency, cash flow, currency and estate planning, so that every vesting event is assessed in the context of the client's broader financial life rather than in isolation. That is the difference between managing equity compensation reactively and using it as a deliberate part of a globally considered wealth strategy.

Viewed this way, equity compensation becomes one moving part of a globally integrated wealth strategy, not a standalone bet on a single stock.

For clients with meaningful equity compensation and cross-border complexity, this is a planning conversation worth having. If an RSU or ESPP position has been sitting in the too-hard basket, it is worth bringing into the light.

Get in touch to speak with an Apt adviser who understands the US–Australia cross‑border landscape and can help turn a concentrated stock position into a coherent global strategy.

General Advice warning

The information provided in this blog does not constitute financial product advice. The information is of a general nature only and does not take into account your individual objectives, financial situation or needs. It should not be used, relied upon, or treated as a substitute for specific professional advice. Apt Wealth Partners (AFSL and ACL 436121 ABN 49 159 583 847) and Apt Wealth Home Loans (powered by Smartline ACL 385325) recommends that you obtain professional advice before making any decision in relation to your particular requirements or circumstances.