A foreign currency mortgage can become much more burdensome even if the initial interest rate seemed advantageous. If you earn income in euros and the loan is expressed, indexed, or repayable in a different currency, the exchange rate can affect your installments and remaining debt. The point, however, is not merely how much the exchange rate has shifted: what matters above all is what the contract provided and what information was given to you before signing.
I want to help you distinguish an exchange rate risk that was clearly explained from a clause that shifts economic consequences on the consumer that were not truly understandable. We will see when the transparency of the mortgage can be challenged, what the potential unfairness of a clause entails, what scope a claim for damages might have, and why converting the loan does not always coincide with solving the problem that has already matured.
An unfavorable exchange rate does not make the mortgage unfair on its own
Currency fluctuation is not enough, on its own, to prove unlawful conduct. In a foreign currency loan, the borrower may be exposed to the risk that the loan currency strengthens against the euro. In that case, to buy the same amount of currency needed to pay an installment or settle the debt, more euros are required. The contract can therefore become more costly without this consequence, by itself, rendering the mortgage null and void.
The issue changes if the risk was governed by conditions drafted by the bank, not genuinely negotiated, and formulated in a way that prevents the consumer from understanding their operation and economic weight. Articles 33 et seq. of the Consumer Code protect consumers from clauses that, despite good faith, cause a significant imbalance in rights and obligations to their detriment. The assessment concerns the contractual text as a whole and the context in which it was concluded.
Not all mortgages linked to a foreign currency are the same. In some cases, the principal is actually denominated in the foreign currency and must be repaid in that same currency; in others, the sums are disbursed in euros, but the debt or installments depend on an indexing and conversion mechanism. Furthermore, commissions, two different exchange rates for disbursement and repayment, or calculation criteria left to contractual parameters may be provided. To understand which rule applies, one must precisely identify the clause that drives up the cost.
Transparency: understanding the mechanism and economic consequences
A clear clause is not merely a clause written without ambiguity. In the relationship between the bank and the consumer, transparency requires that the financial mechanism be explained in a way that allows its foreseeable effects to be evaluated. The Court of Justice of the European Union, in the Andriciuc judgment, clarified that the consumer must be able to understand not only the formal structure of the repayment obligation in the loan currency, but also the potentially significant economic consequences of exchange rate risk. Judgment of the EU Court of Justice, Case C-186/16, Andriciuc
This does not mean the bank must guess future market trends or guarantee that the exchange rate will remain stable. It means, instead, that those who take out the mortgage must receive adequate elements to understand that a devaluation of the currency in which they receive income can make the debt more burdensome. Relevant factors include, for example, the way the exchange rate is determined, any difference between the exchange rate applied to disbursement and the one applied to payments, the simulations provided, and the warning that the installment or remaining principal may increase.
The decisive moment is the conclusion of the contract
The fairness of the clause is judged by looking at the time of signing. European regulations require consideration of the circumstances existing at the time the contract was concluded, the nature of the service, and other accompanying conditions. A loss that emerges many years later may be important as a concrete effect, but it does not automatically turn a clause that was understood and regulated risk in a balanced way into an unfair one. Directive 93/13/EEC on unfair terms in consumer contracts
Conversely, the increase in debt can make a problem visible that already existed: overly general information, a risk presented as marginal, opaque calculation, or a clause that grants the bank an unexplained advantage. The judge does not replace the contract with a more convenient agreement simply because the exchange rate has had a negative impact; they assess whether contractual balance and transparency were respected when you assumed the obligation.
Loan conversion and the 20 percent threshold notice
For certain residential mortgages, the law provides specific protection. The Consolidated Banking Act also defines "foreign currency" as any currency other than the one in which, at the time of signing, the consumer predominantly receives income or possesses assets intended to repay the loan. In the chapter dedicated to credit agreements relating to residential immovable property, Article 120-quaterdecies grants the consumer the right to convert the loan into certain alternative currencies. Legislative Decree no. 72 of 2016, with Article 120-quaterdecies TUB
Conversion may take place into the currency in which the main part of the income or assets intended for repayment is denominated, or in the legal tender of the Member State of residence indicated by the rule. Unless otherwise provided contractually, the conversion rate corresponds to that recorded by the European Central Bank on the day of the application. The CICR may set conditions for exercising the right, and the contract therefore remains essential to identify the concrete applicable rules.
The notice above 20 percent is an information obligation, not an automatic refund. When the value of the total amount of credit or remaining installments exceeds by more than 20 percent that which would result from applying the exchange rate between the loan currency and the euro at the time of stipulation, the lender must inform the consumer in periodic communications. The notice must mention the right of conversion and related conditions. This protection stems from the implementation of Article 23 of the Mortgage Credit Directive. Directive 2014/17/EU, Article 23 on foreign currency loans
These rules do not automatically transfer to every previous financing agreement or to a contract falling outside the scope of residential property credits governed by Chapter I-bis of the TUB. For an older mortgage, the conclusion date, applicable transitional provisions, and type of credit are decisive elements. In any case, the verification of potential unfairness of the clause under consumer law remains separate.
If a clause is unfair, the effect is not always the annulment of the entire mortgage
The unfair clause is not binding on the consumer. This is the principle of Directive 93/13 and of protective nullity provided by Article 36 of the Consumer Code. The effect concerns the single targeted provision, not necessarily the entire loan. The contract can continue to exist if, once that clause is removed, it retains a viable legal and economic structure.
In a foreign currency mortgage, however, the consequence depends on the function of the clause. An ancillary provision on the exchange spread, a commission, or a conversion criterion can be separated more easily from the rest of the contract. If, instead, the clause defines the principal to be repaid, the debt currency, or the essential installment mechanism, its removal may make it necessary to establish whether the contract can continue without altering its nature.
There is no standard remedy valid for all contracts. The judge cannot simply rewrite the mortgage by choosing a more favorable exchange rate or a different currency because that solution appears fair. Any integration of the contract, its survival, and the resulting restitutions must respect the rules applicable to the individual relationship. The Court of Justice has also addressed, in foreign currency financing, the problem of the effects of eliminating the clause and the possibility that the contract continues. Judgment of the EU Court of Justice, Case C-26/13, Kásler
Compensation for damages: what must be proven
Compensation does not automatically follow the growth of installments. To obtain redress for damage, it is not enough to prove that the mortgage has become burdensome. It is necessary to link conduct attributable to the bank or a relevant violation to an economically identifiable prejudice. Concretely, the problem may concern insufficient pre-contractual information, misleading communication on risk, an opaque calculation mechanism, or the application of an invalid clause.
Causation is central. One must distinguish the loss due to normal market fluctuation, which the contract could allocate to the borrower in a clear manner, from the economic consequence deriving from an unfair clause or missing decisive information. Proving that the exchange rate increased the cost of the mortgage is not the same as proving that, with complete and understandable information, you would not have accepted that product or would have accepted it under different conditions.
Nullity, restitutions, and damages are distinct levels. Establishing the ineffectiveness of a clause can open an issue of recalculation or restitution of sums paid in application of that provision. Compensation requires instead further or different damage, proof thereof, and the connection with the contested conduct. Confusing these remedies often leads to formulating excessively generic requests: first, which clause is contested must be defined, then what economic effect it produced, and finally which protection is consistent with that fact.
Concrete options: conversion, agreement, or contesting the clause
Conversion focuses primarily on future risk. If the mortgage falls under the applicable regulations and conditions are met, converting the loan can reduce exposure to new fluctuations between the debt currency and the income currency. However, it does not establish on its own whether clauses already applied were valid nor does it automatically decide what happens to amounts already paid.
An agreement with the bank can concern the renegotiation of the currency, rate, duration, or repayment methods. This is a different path from contesting unfairness: it can be useful to make the relationship sustainable, but it must be read carefully if it contains waivers, declarations about the past, or an overall definition of claims. Subrogation or new financing can also address future cost without erasing potential issues originating from the original contract.
The contestation must indicate a precise defect. Simply saying that the mortgage is "in foreign currency" or that the exchange rate is unfavorable does not allow for identifying the remedy. The request must be linked to the exchange clause, the calculation method, information documents, or communications received. To guide an initial review, the contract and attachments, the amortization plan, bank statements, exchange risk communications, and any documents delivered before signing are generally useful.
Frequently Asked Questions
Can I contest the mortgage just because the exchange rate increased the debt?
No, the increase in debt is not sufficient on its own. You must identify a clause or relevant conduct: for example, an opaque exchange mechanism, the absence of understandable risk information, or the application of unexplained costs. The unfavorable exchange rate can prove the severity of the economic impact, but it does not replace proof of a contractual or informational defect.
Was the bank supposed to warn me about exchange rate risk?
Yes, the risk must be understandable before signing. Transparency does not require a market prediction, but information allowing one to understand how currency variation can affect repayment obligations. For contracts subject to residential property credit regulations, specific information obligations regarding exceeding the statutory threshold also exist.
Can I convert the mortgage into euros at any time?
It depends on the type and date of the financing. Article 120-quaterdecies of the TUB recognizes the right to conversion in contracts falling within its scope, with alternative currencies identified by law and possible conditions established by the CICR. An earlier or different mortgage from a residential property credit requires separate verification of the contract and temporally applicable regulations.
If a clause is unfair, is the entire mortgage annulled?
As a rule, the clause is struck down, not the entire contract. The unfair clause is not binding on the consumer, while the mortgage continues if it can function without that provision. When the clause concerns an essential element, such as currency, principal, or repayment mechanism, it must instead be established whether the relationship can be preserved and with what effects under applicable law.
Can I obtain both recalculation and compensation?
They are different requests and require different prerequisites. Recalculation or restitution may depend on the ineffectiveness of a clause and sums paid in its application. Compensation also requires proof of damage and the connection between that damage and the contested conduct or violation. This is why it is important not to present the two protections as identical.
A criterion for deciding without confusing remedies
The most useful question is not "how much did I lose?", but "why was that cost charged to me?". The answer requires separating normal exchange exposure from the cost generated by a non-transparent clause, a double conversion rate, or insufficient information. Only in this way can one understand whether the path concerns future conversion, relationship renegotiation, clause contestation, or a request for restitution or compensation.
If the contract and statements do not make clear how the debt was formed, you can contact me: we will examine the concrete clause and accompanying documentation, without confusing a market risk with a legally relevant defect.