Hi everyone, I’ve been house-hunting recently and found myself a bit short on the down payment. My family offered to help out, but I’ve been wondering: is that actually allowed in Spain? Will it raise red flags with the tax authorities? And how do banks view it? I’m sure many of you have had the same questions, so I did some research and wanted to share what I’ve learned.
A Loan for Your Down Payment? It’s Legal, But There’s a Catch!
First, let me put your mind at ease: in Spain, borrowing money from family or friends to cover part or all of your property purchase is completely legal. However—and this is the important part—you can’t just have them transfer the money to your account and call it a day. To avoid legal and tax complications, you must formalize the transaction to prove it is a “loan” and not a “gift.”

The Key Difference: Loan vs. Gift
Why is it so crucial to distinguish between a loan and a gift? Because it directly affects your finances! If you receive money for buying property in Spain without any formal documentation, the tax agency (Hacienda) is likely to classify it as a gift. You could end up facing back taxes and hefty fines, which would be a costly mistake. This comparison table makes it clear:
| Characteristic | Loan from Family/Friends | Gift from Family/Friends |
| Nature | A debt that must be repaid | A donation with no repayment obligation |
| Taxation | Tax-exempt when properly documented | Subject to Gift Tax (Impuesto de Donaciones) |
| Key Document | Loan Agreement (Contrato de Préstamo) | Public Deed of Gift (Escritura de Donación) |
| Tax Form | Modelo 600 | Modelo 651 |
How to Do It Correctly
To ensure your loan is completely above board, follow these two main steps:
- Sign a formal loan agreement: You can draft it yourself or have a lawyer or gestor assist you. The contract must clearly state: the personal details of both the lender and borrower, the loan amount,
interest rate (which can be 0%), the repayment method, and the term. Once signed by both parties, this document is legally binding.
- Declare it to the tax authorities: Within one month of receiving the funds, you must complete and submit the Modelo 600 form to the regional tax office. Even for a zero-interest loan where the tax due is zero, this declaration is mandatory! It serves as the strongest official proof that the money is a loan, not a gift.
When approving a mortgage, banks will also scrutinize the source of your down payment to prevent money laundering. A formal loan agreement registered with the tax office is your best proof of legitimacy. In short, borrowing from family and friends to buy a home in Spain is a viable option, but only if you keep the finances clear and documented. Make sure you do the paperwork—sign a contract and file the declaration. This will give you peace of mind and help you avoid future problems. I hope this has been helpful!