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Mortgage transfer to the buyer: what it is and when it is possible

Mortgage transfer to the buyer consists of the property purchaser taking the seller's place as the debtor of the loan. The mortgage charge is not fully cancelled at that moment: the holder of the debt changes (with the same bank or, under other arrangements, with a different lender depending on how the transaction is structured).

It is not the most common method in every property sale. The norm remains cancelling the existing mortgage using the sale price. Transferring the mortgage makes sense when keeping the loan is advantageous (due to terms, deadlines or cancellation costs) and the bank accepts the new debtor.

What it implies for seller and buyer

For the seller, the objective is usually to be released from the debt and any joint or personal liability tied to the loan. This only happens if the lender documents the transfer correctly and releases you. Do not sign assuming that "it is no longer your problem" without checking the documentation.

For the buyer, they take on the repayments and loan terms (or those renegotiated). The bank will assess their creditworthiness just as they would for a new mortgage: income, stability, other debts and risk profile. The fact that the property already has a mortgage does not oblige the lender to accept the buyer.

Legal effects of selling a mortgaged property according to the creditor's response

Comparison of the legal consequences for the contracting parties under the applicable civil regulations.

  • Legal aspect

    Release of the original seller

    With creditor consent

    The seller is fully released from personal liability for the debt.

    Without creditor consent

    The seller retains personal liability for the loan.

  • Legal aspect

    Effect of debt assumption

    With creditor consent

    The buyer becomes the primary debtor formally recognised by the lender.

    Without creditor consent

    The internal agreement between buyer and seller is not binding on the mortgage creditor.

Regulated under Articles 118 and 1205 of the Spanish Civil Code.

Fuente: BOE: arts. 118 y 1205 Código Civil

When it is usually considered

  • The interest rate or term of the current loan is attractive compared to what the market offers the buyer.
  • Early cancellation would incur fees or costs that both parties wish to avoid or split.
  • The transaction works better if the buyer "steps into" the existing loan rather than taking out a new one from scratch.

In practice, many transactions end up in cancellation because the buyer brings their own mortgage from another lender, or because the seller's bank does not accept the transfer under the desired terms.

What the bank decides

The bank will evaluate the buyer as a new debtor client. It may request payslips, tax returns (IRPF), employment history, bank statements and the rest of the usual file. It may also make the transaction conditional on a novation (a change of interest rate, term or clauses) or reject it if the profile does not fit.

Each bank has its own policy. There is no universal loan-to-value percentage or debt-to-income threshold that applies across all lenders: what one accepts, another may reject.

Alternatives if the transfer does not go through

  • Cancellation using the sale price: the most common option when the purchase price covers the remaining balance.
  • New mortgage taken out by the buyer: finances the purchase, and those funds are used to cancel the seller's mortgage.
  • Debt write-off or bank agreement: if the balance exceeds the property value, negotiations are sometimes required before selling. Find out more in our service on selling a house with debt or a mortgage.

What to check in the contract

Costs and timeframes (without magic figures)

Transferring a mortgage can save on the full cancellation of the old loan, but it is neither free nor instant. There are notary and land registry procedures, and the bank may make the operation conditional on a novation (change of interest rate, term or linked products). Ask in writing which expenses each party will pay.

Regarding timeframes, delays are usually caused by the buyer's risk assessment, not the "actual signing". If the buyer needs a quick answer to avoid missing out on another property, a mortgage transfer only works if the lender commits to a realistic timetable.

In deposit agreements (arras) and in the title deed, it is best to clarify: whether the transaction depends on the acceptance of the transfer, deadlines for the bank's decision, what happens if the bank says no, and who pays which costs. A vague "will transfer" is a classic source of conflict.

If the legal aspects require detailed review (conditions precedent, seller release, withdrawal clauses), Sky Law (European Legal Awards in Real Estate Law, 2023-2025) can review the agreement before signing.

Are you selling with a mortgage and unsure whether it is better to cancel or transfer it? At Sky Real Estate, we help you evaluate the balance, property value and buyer profile to choose the path that can successfully complete the deal.

Frequently asked questions

Is the bank obliged to accept the buyer taking over the mortgage?
No. Under the Civil Code, for the buyer of the mortgaged property to assume liability and for the seller to be released from the debt, the creditor (the banking entity) must give express or tacit consent.

Fuente: BOE, art. 118 Código Civil

What happens to the seller if the bank does not expressly authorise the mortgage transfer?
If the creditor does not give consent, the agreement between buyer and seller to assume the mortgage does not release the original seller, who remains personally liable for the loan to the lender.

Fuente: BOE, art. 118 Código Civil

Must the financial institution assess the buyer's creditworthiness before transferring the mortgage?
Yes. The Real Estate Credit Agreements Act requires the lender to conduct an in-depth assessment of the potential borrower's creditworthiness before formalising the transfer or modification of a real estate credit.

Fuente: BOE, art. 11 Ley 5/2019

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