Euribor's Three- and Six-Month Rates Hit Fresh Highs, Nudging Up Portugal's Variable Mortgages

The cost of a variable-rate mortgage in Portugal edged higher again this week as Euribor, the eurozone benchmark that sets most home loans in the country, pushed to fresh peaks at the maturities that matter most to households. The three- and six-month rates both climbed to their highest levels in more than a year, extending a rebound that began after the European Central Bank (ECB) reversed course last month and lifted its policy rates for the first time since 2023.

Where the rates stand

The six-month Euribor — now the reference used for the largest share of Portuguese variable mortgages — rose to 2.717%, up almost seven-hundredths of a point on the day and its highest reading since December 2024. The three-month rate advanced to 2.490%, a peak not seen since March 2025, while the twelve-month rate, which reacts most to expectations of future ECB moves, jumped the most of the three to 2.916%.

The daily moves look small in isolation, but they mark a clear change of direction. For much of 2025 Euribor was drifting downwards as the ECB cut rates to support a sluggish euro-area economy. That easing cycle has now stalled: on 11 June the ECB raised its key rates by a quarter of a point, the first increase since September 2023, and money markets have been repricing upward ever since.

Why it hits Portuguese borrowers hard

Few housing markets in Europe are as exposed to these swings as Portugal's, where the overwhelming majority of home loans carry variable rates tied to Euribor rather than a fixed rate locked in for the life of the loan. Since January 2024 the six-month Euribor has become the single most common index, according to the Banco de Portugal (Bank of Portugal), accounting for roughly 39% of the outstanding stock of residential mortgages. The twelve-month rate covers about 32% and the three-month rate close to 25%, meaning that this week's increases touch, in one form or another, almost every household with a variable loan.

Because contracts reset only periodically — every three, six or twelve months depending on the index — the pain arrives on a lag. A borrower whose loan is pegged to the six-month rate will not feel today's figure until their next reset date, but when it comes the monthly instalment will reflect the higher benchmark plus the bank's spread.

A modest but unwelcome turn

For now the increases are incremental. Even after this week's moves, all three maturities remain well below the peaks above 4% reached in 2023, when aggressive ECB tightening sent Portuguese mortgage bills soaring and squeezed family budgets across the country. June's monthly averages — 2.596% for the six-month rate and 2.798% for the twelve-month — sit only modestly above where they were earlier in the spring.

Still, the trajectory is what worries households. After a year in which falling rates offered gradual relief, the market is once again pointing the other way. Whether this is a brief blip driven by oil prices and geopolitical nerves or the start of a more durable climb will depend on the ECB's next steps — and, for hundreds of thousands of Portuguese borrowers, on the reset date printed in their loan contract.