Many Swiss people preparing to move to Spain assume that the double taxation agreement between the two countries automatically protects them: since an agreement exists, they believe they will never pay tax twice and that the issue is therefore settled.
This assumption is partly correct, but incomplete. The agreement is designed to prevent double taxation, but it does not guarantee favourable taxation and does not remove the need to analyse the situation before leaving Switzerland. If misunderstood, it can even give the impression that a situation is secure while several important points still need to be checked.
What is the Switzerland–Spain double taxation agreement?
Switzerland and Spain are bound by an agreement for the avoidance of double taxation with respect to taxes on income and wealth. It was signed on 26 April 1966 and entered into force on 2 February 1967. It has since been amended, notably by the protocols of 2006 and 2011, the latter entering into force on 24 August 2013.
Its purpose is not to create a common tax system for both countries, but to allocate their taxing rights and establish mechanisms to prevent the same income or asset from ultimately being taxed twice.
In practical terms, the agreement determines, depending on the nature of the income, which country may tax it and, where both countries have taxing rights, how double taxation must be eliminated.
It is therefore not an automatic tax exemption mechanism. It is a set of rules that must be applied to the taxpayer’s specific situation.
Pensions and retirement income: tax residence plays a decisive role
For pensions and similar remuneration paid in respect of past employment, the agreement generally provides for taxation in the beneficiary’s country of residence.
A person who leaves Switzerland and becomes a Spanish tax resident cannot therefore assume that a benefit will continue to be taxed in Switzerland simply because it is paid by a Swiss institution.
There are, however, exceptions, particularly for certain pensions arising from public-sector employment. The exact nature of the benefit must therefore be identified before determining which country has the right to tax it.
It is also important not to automatically treat AHV/AVS, occupational pension benefits and all forms of third-pillar savings under a single tax rule. The treatment depends on the nature of the benefit, its origin and its classification under the agreement and Spanish law.
The trap of taking the second pillar as a lump sum
This is one of the most sensitive issues when moving from Switzerland to Spain.
A lump-sum withdrawal from the second pillar may benefit from specific taxation in Switzerland. However, if the beneficiary is a Spanish tax resident at the time of payment, the Spanish tax treatment of the benefit must also be examined.
Depending on the nature of the benefit and the beneficiary’s situation, Spain may treat all or part of the lump sum as taxable income for Spanish personal income tax purposes, known as IRPF. Spanish taxation does not necessarily reproduce the preferential tax treatment that may apply in Switzerland to pension lump-sum benefits.
In other words, a withdrawal that appears advantageous from a Swiss tax perspective can become significantly less favourable if Spanish taxation applies at the time of payment.
The timing therefore becomes extremely important: the date of the withdrawal, the date of departure from Switzerland, arrival in Spain and the point at which tax residence changes should not be considered separately.
There is no single ideal date that applies to everyone. The appropriate sequence depends on each person’s personal, professional, financial and tax situation.
Property: a frequently misunderstood exception
Another common misconception is that becoming a Spanish tax resident automatically transfers the taxation of all assets held abroad to Spain.
For real estate, the principle is different: the country in which the property is located generally retains the right to tax property income and capital gains arising from that property.
A Spanish tax resident who keeps a property in Switzerland may therefore remain subject to Swiss taxation in connection with that property. Likewise, a property located in Spain is subject to the Spanish tax rules applicable to real estate.
The country of residence may nevertheless have to take these income streams or assets into account in its own tax return, depending on domestic legislation and the provisions of the double taxation agreement.
This issue should therefore be considered from the beginning of any property-related planning, rather than only when completing the first Spanish tax return.
Automatic exchange of information: Swiss accounts do not become invisible
Switzerland and Spain participate in the automatic exchange of information on financial accounts under the international standard established by the OECD.
When a Swiss financial institution identifies an account holder as tax resident in a partner jurisdiction, certain financial information may be transmitted to the relevant tax authority in accordance with the applicable automatic exchange of information rules.
It should therefore not be assumed that a bank account kept in Switzerland remains unknown to the Spanish tax authorities simply because the funds continue to be held in Switzerland.
The important point is to ensure that the relevant income, accounts and assets are properly declared whenever Spanish legislation requires it.
What the agreement does not do
It is useful to remember what the double taxation agreement does not guarantee:
- it does not automatically exempt income from tax;
- it does not guarantee a particular level of taxation;
- it does not remove reporting obligations imposed by national legislation;
- it does not determine a person’s tax residence on its own;
- it does not decide the best time to withdraw pension capital;
- it does not replace an analysis of assets and the timing of the move.
The agreement governs the interaction between the two tax systems. It does not build the taxpayer’s departure strategy from Switzerland on their behalf.
Common mistakes
- assuming that the existence of the agreement means that no tax will be due;
- assuming that a pension paid from Switzerland will necessarily remain taxable in Switzerland;
- withdrawing second-pillar capital without first checking the consequences of a change in tax residence;
- believing that the taxation of a property automatically follows the taxpayer’s country of residence;
- assuming that a bank account kept in Switzerland is irrelevant to the Spanish tax authorities;
- treating the double taxation agreement as an isolated issue without linking it to tax residence, pension planning and wealth.
The Switzerland → Spain strategic audit to clarify how the agreement applies in practice
At Immo Matas Suisse, the Switzerland → Spain strategic audit places the double taxation agreement within the real context of the relocation project: tax residence, second pillar, assets, property and the timing of the move.
The aim is not to replace personalised tax advice where this is required, but to identify sensitive points and decisions early enough for them to be checked before leaving Switzerland.
This is particularly important where a pension lump-sum withdrawal, a property sale or a significant change in the structure of assets is planned around the date of relocation to Spain.
Discover the Switzerland → Spain strategic audit
Frequently asked questions
Does the Switzerland–Spain double taxation agreement prevent all taxation?
No. It allocates taxing rights between Switzerland and Spain and establishes mechanisms to prevent double taxation. It does not mean that income is tax-exempt.
Are Swiss pensions taxed in Switzerland or Spain?
It depends on the nature of the benefit. For pensions and similar remuneration linked to past employment, the country of residence generally has the right to tax. Special rules do, however, apply to certain public-sector pensions.
Is a lump-sum withdrawal from the second pillar covered by the agreement?
Yes. The treatment of pension capital must be analysed under the double taxation agreement, Swiss law and Spanish tax law. The timing of the withdrawal in relation to the change in tax residence can have significant financial consequences.
Does Swiss property remain taxable in Switzerland if you become a Spanish tax resident?
In principle, Switzerland retains the right to tax income and capital gains linked to a property located in Switzerland. This does not prevent a Spanish tax resident from having reporting obligations in Spain.