When one spouse is Spanish tax resident and the other is not

Key rules

• Presumption: A spouse and minor children living in Spain make Spain presume you are resident, unless you prove tax residence elsewhere.
• Burden of proof: You must prove you are not resident.
• Treaty weight: A spouse's home counts heavily in the tie-breaker but is not decisive on its own.
• Consistency: Your filing positions in both countries must match the same facts.

If your spouse and children live in Spain

If your spouse and children live in Spain, Spain can treat you as a tax resident even if you spend most of the year elsewhere. This is a starting assumption, not a final decision. You can challenge it, but you have to prove your case.

Family facts count twice: once in Spain's own residence test and again in the treaty tests that decide between two countries. Whatever you claim in one place must fit what you claim in the other.

How the Spanish presumption works

Spain presumes you are resident if your spouse (not legally separated) and your dependent minor children habitually live in Spain. The presumption stands unless you prove that you are tax resident in another country. Your economic interests are a separate Spanish residence test and do not have to be in Spain for the presumption to apply.

To show the spouse, bring your marriage certificate and proof that the spouse habitually lives in Spain, for example padrón registration. For the children, bring birth certificates and proof of their habitual residence in Spain, for example school enrolment or padrón.

A registered partner (pareja de hecho inscrita) is not named in the presumption, so your partner's home in Spain is weighed with the other facts about your personal ties, case by case. Bring the certificate of registration in the partnership register. An unmarried, unregistered partner is not named either; the partner's home counts only as a personal tie that you prove, for example with a shared address or a child together.

To rebut the presumption, ask the other country's tax authority for a tax residence certificate and give it to the Spanish tax agency with your work evidence and day counts. Useful evidence includes:

• A tax residence certificate from the other country.
• Proof that your work and income are based abroad.
• A record of the days you spent in Spain and elsewhere.

Courts look at the facts as a whole, so a thin file rarely succeeds.

How family counts in the treaty tie-breaker

If both countries claim you, the treaty first asks where you have a permanent home, then where your personal and economic ties are closest. A spouse's home is a major factor in that second step, but it is not decisive.

If your work and assets are firmly abroad, they can outweigh a family home in Spain. Expect Spanish authorities to give the family location strong weight.

Filing positions must match

Keep your story the same everywhere. If you tell the other country you are resident there and Spain that you are not, your days, home and work evidence must support both. If you say you live in Spain on one form, do not say otherwise on another.

Joint filing is open only to families resident in Spain for income tax, so a non-resident spouse cannot join a joint Spanish return.

What to do

Pick the case that matches your life and file the same way in both countries:

• Your work and tax home are abroad, your family is in Spain: ask the other country's tax authority for a tax residence certificate for each year, file the non-resident return, Modelo 210, for any Spanish-source income, and keep the evidence listed above to answer the Spanish tax agency if it applies the presumption.
• You accept Spanish residence: file the resident return, Modelo 100, for your worldwide income and claim a credit for foreign tax.
• Both countries claim you: with a home in each country, the treaty tests put you where your personal and economic ties are closest; family in Spain weighs strongly, but work and assets abroad can outweigh it. If the tie-breaker puts you in the other country, the first case applies; if it puts you in Spain, the second case applies.
• You live in another EU or EEA state and earn at least 75% of your income in Spain: you can opt to be taxed in Spain as a resident, which also lets you file jointly with your spouse. You apply to the Spanish tax agency with your return.

Your spouse who lives in Spain is a Spanish tax resident in every case. They file the resident return, Modelo 100, for their own income, alone, or together with you if you are also resident in Spain.