Tax

Capital gains tax and usufruct: who will pay the tax in the future?

The planned capital gains tax on financial assets is starting to take shape. For entrepreneurs and families who have already structured their assets within the framework of succession planning, this raises new questions. What does this tax mean for existing planning? And, above all, who will ultimately bear the tax burden?

To make this clear, we look at a widely used technique in family wealth planning: the donation of an investment portfolio with reservation of usufruct.

Claudia Duchateau
21 avril 2026
Capital gains tax and usufruct: who will pay the tax in the future?

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Usufructuary manages, bare owner pays?

In many families, parents donate their securities portfolio to their children, while retaining the usufruct. In practice, this means that the parents continue to manage the assets. For example, they decide when securities are purchased or sold.

From a tax perspective, however, responsibility lies elsewhere. When a capital gain is realised upon a sale, the bare owner is in principle regarded as the taxpayer. From a legal perspective, this is logical, as the bare owner is the sole owner of the assets. The usufructuary is only entitled to the income from the portfolio, such as interest or dividends.

A capital gain is not regarded for tax purposes as a ‘fruit’, but rather as an increase in the value of the asset itself. As a result, a peculiar situation can arise: the usufructuary often determines the investment policy and the timing of the sale, while the tax bill falls to the bare owner.

When management is entrusted to a bank or asset manager, this principle does not change. Even in situations where it has been stipulated in the deed of gift that capital gains accrue to the usufructuary, the bare owner remains liable to tax.

Capital gains tax: withholding by the bank or declaration?

When a capital gain is realised, the financial institution will in many cases automatically withhold the tax at source. This system is often referred to as an opt-in.

In this case, the tax due is immediately deducted from the sale proceeds within the portfolio, avoiding the bare owner having to pay the tax from their own funds.

However, this system also has drawbacks. The bank does not take into account certain tax optimisations, such as:

  • a higher historical acquisition value

  • the annual exemption on capital gains

  • the offsetting of any capital losses

The exempt portion currently amounts to €10,000 euros per taxpayer and can increase to €15,000 euros with indexation.

When several bare owners jointly own a portfolio, each can use their own exemption. Those who wish to make use of these optimisations will need to report the capital gain in their personal income tax return.

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Opt-in or opt-out: an important choice

Another point to consider is how any tax refund is handled. When the bank withholds the tax at source, it is done using funds from the portfolio to which the usufruct applies. If it later turns out that too much tax has been paid, any refund is paid personally to the bare owner.

This can give rise to practical or financial questions within families. That is why it is also possible to choose an opt-out. In that case, no tax is withheld at source and the bare owner must declare and pay the capital gain themselves.

From a tax perspective, this can be more advantageous, but it usually means that the tax must be financed outside the portfolio using private funds. In addition, the agreement of all account holders is generally required.

The choice between opt-in and opt-out is therefore more than an administrative formality. In a family context, it is often advisable to make clear arrangements in this regard.

Impact on existing succession planning

The introduction of a capital gains tax does not in itself affect the validity of existing donations or usufruct structures. Nevertheless, the new tax may influence the financial balance within a family planning arrangement. The person making the investment decisions is not necessarily the same as the person liable for the tax.

This makes it important to review existing structures.

Well-thought-out succession planning does not stop at the donation itself. The tax consequences of the chosen structure should also be evaluated on a regular basis. With the introduction of a capital gains tax, this exercise becomes even more relevant.

Do you need advice on capital gains tax and usufruct? Do not hesitate to contact us. We will be happy to assist you.

FAQ – Capital gains tax and usufruct

  • Who pays the capital gains tax on a portfolio with usufruct?

    In principle, the bare owner is liable for tax when a capital gain is realised. The bare owner is the legal owner of the portfolio, while the usufructuary is only entitled to the income, such as interest and dividends.

  • Why is the bare owner taxed on a capital gain?

    A capital gain is regarded for tax purposes as an increase in the value of the asset itself, and not as a fruit or income from that asset. Therefore, the tax liability rests with the owner of the capital, namely the bare owner.

  • Does the tax liability change if the usufructuary manages the portfolio?

    No. Even when the usufructuary manages the portfolio and decides when securities are bought or sold, the bare owner remains fiscally responsible for the capital gains tax.

  • What if a bank or asset manager carries out the management?

    The tax logic still remains the same. Even when a financial institution manages the portfolio, the bare owner is regarded as the taxpayer when a capital gain is realised.

  • Does a clause in the deed of gift regarding capital gains affect the tax liability?

    No. Even if the deed of gift states that capital gains accrue to the usufructuary, the bare owner remains liable for tax under the tax rules.

  • How does withholding of capital gains tax by the bank work?

    If the so called opt-in is chosen, the bank will automatically withhold the tax at source when a capital gain is realised. This means that the tax is directly deducted from the sale proceeds within the portfolio.

  • What does opt-in mean for capital gains tax?

    Under an opt-in, the tax is automatically withheld by the bank. While the bare owner does not have to make a separate payment, they may have less access to tax optimisation opportunities.

  • What does opt-out mean for capital gains tax?

    Under an opt-out, the tax is not withheld at source. The bare owner must declare the capital gain in their personal income tax return and pay the tax due.

  • Is there an exemption for capital gains?

    Yes. An annual exemption threshold applies per taxpayer. It currently stands at €10,000 and can increase to €15,000 with indexation.

  • Does capital gains tax impact existing succession planning?

    The tax does not affect the validity of existing donations or usufruct structures. However, it can influence the financial dynamics within families, as the taxpayer is not always the same person as the one managing the portfolio.

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