Banks make new mortgages 8% more expensive: fixed rates rise 6.5% and the fixed period of mixed-rate loans 10.7%

14/09/2026 – ⏱ 6 min · By Realty Investor Editorial Team

This article is for informational purposes only and does not, under any circumstances, constitute investment advice or a recommendation.

The European Central Bank's rate rise of 10 September grabbed the headlines, but the move that most directly affects anyone about to sign a mortgage had been under way for weeks in the lenders' shop windows. According to data compiled by the Spanish financial press from tracking mortgage offers, the price of new home loans has risen by around 8% compared with a year ago. The breakdown is more informative than the aggregate: fixed-rate loans are up 6.5% and the initial fixed period of mixed-rate mortgages 10.7%, in both cases compared with September 2025. This is the so-called front book—new lending—and it moves earlier and faster than the outstanding book, which is only updated when the annual or six-monthly review comes round.

What has changed in mortgage offers

During 2024 and 2025, Spanish banks competed to win mortgage business in an environment of falling rates. That competition compressed spreads and pushed fixed-rate offers to levels that, seen from today, worked as loss-leader products. The monetary turn has reversed the logic: with wholesale funding costs rising, sustaining those prices erodes the net interest margin, and lenders have reacted by raising their offer rates and tightening the conditions for rate discounts. The result is a wide range, which for fixed-rate mortgages runs roughly between 1.85% and 3.95% TIN depending on the lender, the borrower's profile and the degree of cross-selling. These extremes should be read with caution: the lowest advertised rates usually correspond to the maximum discount, which requires paying in salary and bills, taking out life and home insurance, using cards with a minimum spend or making contributions to funds, so the effective cost of the loan does not match the headline rate.

Euribor hits its annual high

The benchmark that governs variable-rate mortgages has strung together its longest upward run since 2023. The daily twelve-month Euribor reading reached 3.138% on 11 September, its highest level of 2026, after breaking through the 3% barrier on 21 August. The provisional September average stands at 3.103%, compared with the 2.954% set as the official August average. The progression over recent months lays out the move clearly: 2.798% in June, 2.855% in July, 2.954% in August and a September average that, if it closes around current levels, would mark the fourth consecutive monthly rise. The year-on-year comparison is what matters for reviews: in September 2025 the average was 2.172%, so anyone reviewing their variable-rate mortgage now will do so with a reference almost one percentage point higher. It should be remembered that the monthly average is not set until the last business day of the month, so the 3.103% is provisional.

The ECB's decision and its transmission

On 10 September the ECB Governing Council raised the deposit facility rate from 2.25% to 2.50%, setting the main refinancing operations rate at 2.65% and the marginal lending facility rate at 2.90%. Euribor, however, did not wait for the meeting: as an interbank rate that incorporates expectations, it had already priced in a good part of the move during August. That is one of the reasons why the rise in mortgage offers had been observed before the announcement. The transmission of monetary policy to mortgage lending has two channels and two speeds: the immediate one, on new lending, which is what these percentages reflect; and the deferred one, on the more than four million outstanding variable-rate mortgages in Spain, which will only feel the change at their next review.

The sales market was already feeling the higher cost

July data published by the Colegio de Registradores show a market that began to cool before this latest rise. Home sales fell 7.7% year on year, to some 60,050 transactions, the largest drop in more than two years. Mortgages registered on homes stood below 43,300, 4.2% fewer than a year earlier. The relationship between the two figures—around 71.6% of sales were financed with a mortgage—remains high in historical terms, which indicates that credit continues to be the main vehicle for access to housing despite the higher cost. That detail is relevant: the greater the weight of credit in the transaction, the more sensitive demand is to changes in interest rates.

Prices still rising despite more expensive credit

The other side of the market is not following the cooling in transactions. The INE's Housing Price Index closed the second quarter of 2026 with a year-on-year rise of 12.2%, with second-hand housing at 12.9% and new-build housing easing to 7.4%. The combination—fewer transactions, prices still rising and more expensive financing—describes a market under strain on the supply side: the shortage of product is sustaining prices even as solvent demand shrinks. For the buyer, the effect is cumulative, because the higher cost of the property and that of the loan add up in the same monthly payment.

How it translates into the monthly payment

An example illustrates the order of magnitude without the need to forecast anything. On a €150,000 variable-rate loan over twenty-five years referenced to Euribor plus a spread, going from a reference of 2.17% to one close to 3.10% means around €65 more per month, some €780 a year, at the corresponding review. In new lending, the effect shows up in a different way: the same offer rate half a point higher can represent several thousand euros over the life of the loan. That is why comparing lenders carries more weight at this point in the cycle. Spanish mortgage transparency rules require the European Standardised Information Sheet (FEIN) to be provided before the consumer takes on any obligation, a document that makes it possible to compare two offers on the same basis of amount, term and payment frequency.

Why this matters to the real estate investor

The cost of debt is the variable that determines the return on any leveraged real estate transaction. When the mortgage rate rises above the gross rental yield, leverage stops amplifying the return and starts to reduce it. In a market where sale prices are rising at double-digit rates and rents at around 6%, that gap narrows, especially in the most expensive locations. For the developer, more expensive credit operates on two simultaneous fronts: the cost of the development loan rises and the number of buyers able to obtain financing falls, which lengthens sales periods and squeezes margins. That combination explains why part of residential development has in recent years sought financing routes other than the traditional banking circuit, including regulated crowdfunding, whose projects usually publish a target return; this estimate is subject to investment risk and is not guaranteed.

What to watch in the coming weeks

Three references concentrate the relevant short-term information. The first is the final close of the September Euribor average on the last business day of the month, which is the figure that will be applied to reviews. The second is the INE's Mortgage Statistics, which will show whether July's fall in mortgages registered on homes continues. And the third is the split between fixed, variable and mixed rates in new signings: a shift towards mixed or variable rates would be a sign that households are seeking a low initial payment while accepting exposure to future reviews, a pattern already seen in previous cycles of rising rates.

Takeaways for the investor

The figures summarised in this article come from sources of different kinds and should not be mixed. The percentages for the rise in mortgage offers are based on tracking the rates advertised by lenders, not the rate actually contracted, which depends on individual negotiation and on each applicant's profile. The September Euribor figure is provisional. The July registry data correspond to registered transactions, with the usual lag relative to signing. And the INE's house price index is a quarterly index that arrives several months behind the market. None of this invalidates the underlying direction—more expensive credit, fewer transactions, prices still rising—but it does advise reading each figure within its own framework. Past results do not anticipate future results, and all real estate investment carries risks of illiquidity, default and total or partial loss of capital. At European level, the activity of crowdfunding platforms is governed by Regulation (EU) 2020/1503 and, in Spain, by the implementing rules and the supervision of the CNMV.

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