Buying Together Without Being Married: Joint Mortgage Applications in Spain

When a Spanish bank looks at a mortgage application from two unmarried partners, it studies both incomes and both sets of existing debts together, as one file. That part feels similar to a married couple applying jointly. What differs is the legal starting point: without a marriage, there is no automatic shared economic regime, so the file has to state in writing how the property and the loan are split.

For buyers from the United Kingdom, that written clarity sits alongside the usual non-resident requirements: proof of income from the UK, a Spanish tax number and a Spanish bank account for each applicant, and documents translated where the bank requires it.

When two unmarried partners apply for a mortgage in Spain, the lender normally studies both incomes and both sets of debts as a combined file rather than as two separate applications. This is common practice across the more than 20 banks we compare, though exactly how each one weighs the figures, and the deposit it asks for, depends on the bank, your country and your financial profile. There is no single formula that applies to every couple.

What matters to the underwriting team is that the numbers are verifiable and consistent: regular income, a manageable level of existing debt, and bank statements that show how money actually moves. Because neither partner is a Spanish resident, the bank will also want to understand income and debt from outside Spain, which usually means a translation into Spanish, sometimes a sworn one, and in some cases an apostille.

Married couples are often treated by Spanish notaries and banks as a single economic unit, depending on their matrimonial regime. Unmarried co-buyers are two separate legal persons, so the file has to spell out, in writing, how the purchase price, the loan and the future property are divided between them. This protects both partners if the relationship, or simply the ownership split, changes later.

For buyers from the United Kingdom, the bank will typically ask for recent proof of income, a record of existing commitments and valid identification for each applicant, alongside evidence of how the deposit funds will reach Spain.

Spanish banks generally ask non-residents for a larger deposit than residents, and the exact share financed depends on the bank, the applicants' country and their combined profile, not on a fixed rule. On top of the price, co-buyers should budget for transfer tax (ITP) on resale homes, set by each Spanish region, or VAT of 10% plus stamp duty on new builds, along with notary, land registry, gestoría and valuation fees.

Once the property is registered in both names, each non-resident owner files an annual Modelo 210 non-resident income tax return, and a local tax adviser should confirm exactly how rental income or any future gain must also be reported to HMRC under the double taxation agreement between Spain and the United Kingdom. If either partner later sells, the buyer withholds 3% of the price on account of that seller's Spanish tax.

Since the United Kingdom is no longer an EU member state, British co-buyers can stay in Spain for up to 90 days in any 180-day period without a visa; longer stays, including time spent managing the property, require a visa or residence permit. The Golden Visa route for property investors ended on 3 April 2025 and should not be treated as an option for either applicant.

Because the United Kingdom uses the pound rather than the euro, co-buyers transferring a deposit or ongoing mortgage payments should factor in exchange-rate movements and currency conversion costs, which can affect how much actually arrives in the Spanish account on a given date.

Spain is a relatively short flight away from most UK airports, making regular visits to a Spanish property straightforward for owners based in Britain. Many British buyers are drawn to Spain for its climate, coastal lifestyle and established expatriate communities. One practical point to bear in mind is that Spanish inheritance law differs from UK rules, so it is worth taking specific advice on how it may affect the property and one's estate. Currency movements between sterling and the euro can also affect the overall cost of purchase and ongoing expenses.

Spain and the United Kingdom have a double taxation agreement in place, and a local tax adviser should confirm how rental income or gains from Spanish property must be declared and reported to HMRC.

As the United Kingdom is no longer an EU member state, British citizens may stay in Spain for up to 90 days in any 180-day period without a visa, and must apply for a visa or residence permit for longer stays.

Since the United Kingdom uses the pound sterling (GBP) rather than the euro, buyers should factor in exchange-rate movements and currency conversion costs when paying for a property or transferring funds to Spain.