The 12-month Euribor is back to costing you €65 a month
On a €150,000 loan over 30 years with a 1% spread, an August reset takes the payment to €703.64 — €64.83 more than a year ago.
If your Portuguese mortgage resets this month, the bill goes up. All three maturities — three, six and twelve months — went into the August revision above where they stood at the previous one, and that lands straight on the monthly payment.
The reference averages came in at 2.417% on three-month Euribor, 2.638% on six and 2.835% on twelve. Applied to a €150,000 loan over 30 years with a 1% spread, DECO PROTESTE’s simulations give this: anyone resetting on the twelve-month rate now pays €703.64 a month, €64.83 more than at last August’s reset. On six months the payment goes to €685.94, up €42.40 since February. On three months it lands at €664.64, €19.99 above the May reset.
Why the annual rate stings most
Because it only adjusts once a year. Households on three-month Euribor have been absorbing the rises in small doses through 2026. Households on the twelve-month rate get everything the market has done since August 2025 delivered in a single instalment. The same mechanism works in reverse when rates fall, which is why that maturity is always last to hand back relief.
The wider picture is stabilisation rather than a spike. Forecasts had Euribor hovering around 2% through the year and the current readings sit a little above that, which is why the August reset has caught out people who assumed payments were on the way down. The policy rates underneath it all are published on the European Central Bank’s site.
What to do with this
If your reset is now, check your statement for which maturity your contract actually uses. A surprising number of borrowers do not know, and it determines everything else. Renegotiating the spread or moving the loan to another bank is still on the table, and the maths tends to work best on older contracts carrying spreads above 1.5%.
House prices are not softening the blow either. The market hit another record in July, its ninth in a row, even as the pace of increase eased. If you are tracking it month by month, our running house-price file keeps the series in one place.
Chart: Tugadaily · data from DECO PROTESTE simulations
