A Portuguese Home Loan Adds Between €23 and €70 in September, the Steepest Single Reset Since Late 2023
On a €150,000 loan over 30 years at a 1 percent spread, the three-month reset adds €23.21, the six-month €46.95 and the twelve-month €70. The European Central Bank meets on 10 September, and markets are already pricing a second rise on 17 December.
Households whose home loan resets in September are facing the sharpest single increase since late 2023. Depending on which Euribor tenor the contract follows, the monthly payment rises by roughly €23 to €70, and the rate-setting meeting that follows is on 10 September.
The mechanism is the one Portuguese borrowers have been living with all year. Most mortgages here are variable, indexed to the three, six or twelve-month Euribor plus a fixed spread, and they reset on that schedule rather than continuously. The Euribor climbed again through August as the standoff between the United States and Iran hardened rather than resolving, oil held its gains, and the European Central Bank signalled it is not finished.
The arithmetic
On a €150,000 loan over 30 years with a 1 percent spread, simulations published by ECO put the September resets like this:
- Three-month Euribor: the payment for the next three months rises by about €23.21, or 3.57 percent, to more than €674.
- Six-month Euribor: the payment for the next six months passes €691, up €46.95 on what has been paid since March.
- Twelve-month Euribor: the payment for the coming year reaches €711, some €70 more than the last twelve months.
The index readings behind those numbers, fixed on 28 August, were 2.573 percent at three months, 2.762 percent at six and 2.981 percent at twelve. The twelve-month rate has been hovering either side of 3 percent for a fortnight.
What the central bank does next
Markets expect a 25 basis point rise on 10 September and are already pricing a second increase of the same size at the 17 December meeting. That would put the ECB's deposit rate at 2.75 percent by the end of the year, the highest since the start of 2025. Isabel Schnabel of the bank's executive board argued last week for tightening further still, invoking the loss of control over prices that followed the invasion of Ukraine in February 2022 as the outcome to avoid.
None of that is settled. But the direction has been consistent since February, when the attacks on Iran began pushing energy prices up, and the pass-through to Portuguese households has been steady rather than dramatic: a few tens of euros at each reset, compounding.
What this means for you
- Know your tenor. Six and twelve-month contracts absorb the whole move at once and then sit still; three-month contracts move more often and by less. Your reset month is on the loan agreement, not the bank's app.
- The affordability rules changed too. The Bank of Portugal cut the maximum debt-service ratio to 45 percent on 1 August, which matters if you are refinancing or transferring rather than sitting tight.
- Transferring a loan is still legal and still free of early-repayment penalties on variable-rate credit. The saving comes from the spread, not the index, since the Euribor is the same at every bank.
- Budget for December. If a second rise lands on 17 December, the next reset after that repeats this month's exercise.
The composition of the bill has already shifted: interest now takes 49.5 percent of the average Portuguese mortgage payment, against a long stretch when capital dominated. September repeats what August already did, only harder. If you are buying rather than repaying, our guide to Portuguese home loans sets out how spreads, tenors and the DSTI ceiling fit together.
