Lawyer, accountant, wealth manager, trustee: who does what, and who coordinates?
The short answer
Four different professionals sit around serious wealth, and they do genuinely different jobs. A lawyer handles the legal documents, an accountant handles tax, a wealth manager invests the money, and a trustee legally holds and administers assets placed in a trust. The trustee is the one most people misunderstand: it sits alongside your other advisors rather than replacing them, and a good independent one has no financial product to sell you.
When wealth becomes complicated, people often assume one firm can cover everything, or that the four roles overlap enough to pick whichever is cheapest. They do not. Each role carries a different duty, a different qualification, and a different way of being paid, and the differences matter most precisely when large sums and several countries are involved. Here is what each one actually does.
The lawyer
Also called a private-client lawyer, solicitor or attorney.
The lawyer advises on the law and drafts the documents that make a structure real and enforceable: wills, trust deeds, shareholder and partnership agreements, powers of attorney. They tell you what is legally possible and put it in writing. They do not manage your money, file your tax returns, or act as your long-term fiduciary. They are usually paid by the hour or by a fixed fee for a defined piece of work.
The accountant
Also called a tax advisor.
The accountant works out what you owe and where, prepares and files your returns, and advises on the tax consequences of decisions across every country you and your assets touch. After a cross-border move this is one of the most important roles you have. They do not hold your assets, draft your legal documents, or pick your investments. They are paid by fee or retainer.
The wealth manager
Also called an investment manager or private banker.
The wealth manager invests the money, building and running a portfolio against the goals and risk tolerance you set. They do not provide legal structuring or, importantly, act as your fiduciary. They are often paid as a percentage of the assets they manage, which is worth understanding clearly, because that fee model gives them a reason to keep as much of your money under management as possible.
The trustee
Also called a fiduciary or trust company.
The trustee legally holds and administers the assets you place into a trust or structure, on behalf of the beneficiaries, under a binding duty to act in their interests. It makes and records distributions, keeps the structure compliant and correctly reported across jurisdictions, and carries the long institutional memory of the family's affairs. It does not give you tax advice, draft your legal documents, or run the portfolio day to day. What a good trustee does instead is coordinate the people who do, which is the point most often missed.
The four roles side by side
Lawyer. Advises on the law and drafts wills, trust deeds and agreements. Does not manage money, file taxes or act as fiduciary. Usually paid hourly or a fixed fee per matter.
Accountant. Calculates and files tax and advises on tax across jurisdictions. Does not hold assets, draft legal documents or invest. Usually paid by fee or annual retainer.
Wealth manager. Builds and runs the investment portfolio. Does not provide legal structuring or act as fiduciary. Usually paid a percentage of the assets under management.
Trustee. Legally holds and administers trust assets and coordinates the others. Does not give tax or legal advice, run the portfolio or sell products. Usually paid fixed or time-based administration fees.
What a trustee does, and does not, do
Because the trustee is the role most people are least familiar with, it is worth being explicit. The line between what a trustee handles and what it deliberately leaves to your other advisors is what keeps the whole arrangement honest.
A trustee does:
Legally own and administer the assets held inside the trust.
Act under a fiduciary duty, in the interests of the beneficiaries.
Make and document distribution decisions, guided by the trust deed and your wishes.
Keep the structure compliant and correctly reported across jurisdictions.
Coordinate with your lawyer, accountant and investment manager so the parts fit together.
Hold continuity and institutional memory across decades.
A trustee does not:
Give you personal tax advice or file your returns; that is the accountant.
Draft your legal documents; that is the lawyer.
Run the portfolio day to day, though it appoints and oversees whoever does.
Sell you financial products. A genuinely independent trustee has nothing to sell.
Replace your existing advisors. It works alongside the people you already trust.
Why independence is the part that matters
The single most useful thing to understand about a trustee is what it earns its money from. A trustee whose only business is fiduciary administration is paid to hold and run the structure properly, and nothing else. It has no investment product to push and no reason to favour one manager over another, so when it coordinates your advisors it can do so on the merits.
Contrast that with a fiduciary service bundled inside a bank or a larger financial group. The administration may be perfectly competent, but the wider group has products to sell, and the incentive to keep your assets inside the house is always present, even when it is never stated. That is why independence, the separation of the people who hold your wealth from the people who want to sell you things, is not a marketing line. It is the structural feature that lets a trustee act as a neutral coordinator rather than one more party with something to push.
The right question is not which of the four advisors to choose, because in most serious cases you will have all four. The question is how they fit together, and who sits at the centre holding the long view. Often that centre is the trustee, precisely because it is independent, has no product to sell, and is built to last across the decades your other advisors may not.
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This article is educational and general in nature. It is not legal, tax or financial advice, and every situation is different. Where a decision matters, speak to a qualified professional in the relevant country.