Euribor Posts Biggest Monthly Jump in Three Years — April Mortgage Payments Rise

Portuguese homeowners are facing higher mortgage payments in April after the 12-month Euribor rate recorded its largest monthly increase since 2023, reversing a year-long downward trend that had offered some relief to borrowers following the sharp rate-hiking cycle of 2022–2023.

The 12-month Euribor — the benchmark used for the majority of variable-rate mortgages in Portugal — rose more than 0.3 percentage points in March 2026. For a typical loan of €150,000 over 30 years with a 1% spread, this translates to an increase in monthly repayments of between €5 and €17, depending on which Euribor tenor was used as the reference rate and when the last reset occurred.

Energy Shock Driving Rate Expectations

The trigger is the same energy shock reshaping the broader Portuguese economic outlook: US-Israeli military strikes on Iran in late February sent oil prices surging past $100 per barrel and European natural gas prices to near-record levels. Markets have rapidly repriced ECB interest rate expectations as a result, with at least two ECB rate hikes now priced in for 2026 — a dramatic reversal from the rate-cut cycle that had been underway.

ECB President Christine Lagarde has publicly acknowledged the geopolitical situation is "probably beyond what we can imagine right now," a rare admission of uncertainty from a central bank that typically projects stability. Under the Bank of Portugal's most severe scenario, Portuguese inflation could reach 4.4% — which would almost certainly require a forceful ECB response.

Portugal's Particular Vulnerability

Portugal is one of the most exposed housing markets in Europe to Euribor movements. Unlike countries such as the UK, Germany, or France — where fixed-rate mortgages dominate — Portuguese borrowers have historically taken on variable-rate products indexed to 6-month or 12-month Euribor. This means rate movements translate quickly and directly into household budgets.

The timing is awkward. Lisbon's median property price has already surpassed €5,000 per square metre, and ratings agency Fitch projected in March a further 15% rise in Portuguese house prices across all of 2026 — driven by persistent supply shortages and strong demand from foreign buyers. Higher borrowing costs will test affordability and could eventually moderate price growth, but no reversal is imminent while supply remains constrained.

What Buyers and Current Homeowners Should Do

For anyone currently on a variable-rate mortgage, now is a sensible moment to review your amortisation schedule and stress-test repayments against a scenario where Euribor rises a further 50–75 basis points by year-end. Portuguese banks are legally required to offer mortgage restructuring options if payments exceed certain income ratios, but proactive engagement is advisable rather than waiting for problems to compound.

For prospective buyers, fixed-rate mortgage products have become more attractively priced relative to variable alternatives over recent months. While fixed rates carry a premium in the current environment, they provide certainty against further Euribor volatility — worth considering carefully if your planning horizon extends beyond 2027.

For property investors, the combination of rising financing costs and potential ECB tightening warrants a more conservative underwriting approach on leveraged deals, particularly in sub-markets where yields are already compressed.

Source: ECO (eco.sapo.pt), March 31, 2026; Bank of Portugal economic bulletin, March 2026