The 12-Month Euribor Broke 3% on 21 August, Its Highest Daily Fixing Since September 2024
The 12-month Euribor's daily fixing touched 3.003% on 21 August, its highest since September 2024, but Spanish revisions use August's 2.94% average.
The 12-month Euribor, the reference rate that resets the majority of Spain's variable-rate mortgages, crossed 3% on 21 August 2026. Spanish outlets including idealista and Demócrata reported a daily fixing of 3.003%, the first print above that threshold since 6 September 2024. The published series at euribor-rates.eu confirms the approach: 2.977% on 19 August and 2.990% on 20 August.
The number that actually bills a borrower is lower
A daily fixing is a headline, not a payment. Spanish mortgage revisions apply the monthly average, and August's provisional average stands at 2.94% — above July's 2.855%, but below the 3% line that generated the coverage. A borrower whose review falls in August is repriced off 2.94%, regardless of what any single day printed.
On that basis idealista estimates the increase on a typical Spanish variable mortgage at more than €70 a month, approaching €900 over a year. The actual figure varies with the spread the bank applies, the outstanding balance and how many years remain — a loan with five years left reprices a far smaller balance than one with twenty-five.
Why the rate turned
The move reflects rate expectations rather than anything that has happened yet. Euro-area inflation ran at 2.9% in July, close to a full percentage point above the European Central Bank's 2% target, and ECB chief economist Philip Lane has said inflation will hover around 3% for the remainder of 2026. Crude oil moved above $90 a barrel after the expiry of a 60-day negotiating deadline between the United States and Iran. Markets have moved to price an ECB increase at the September meeting, and the 12-month Euribor — which is a forward-looking interbank rate — has moved ahead of it.
It lands on an expensive market
Glopra's Spain snapshot of 17 August 2026 shows a national average of $2,331 per square metre, prices up 12.8% over twelve months in local terms, and a gross rental yield of 5.45%. The big cities are considerably further along: Madrid at $6,850 per square metre, Barcelona at $6,002 and Valencia at $3,839. Our index puts Spain nationally in the elevated bubble-risk band and Valencia in the high band.
Rising financing costs against double-digit price growth is the combination that compresses buyer budgets fastest: the payment rises while the amount being borrowed rises with it. At $6,850 per square metre in Madrid, each additional basis point is applied to a larger balance than it was a year ago.
Two things that could reverse it
A daily fixing above a round number can retrace within a week; the 12-month Euribor has crossed and re-crossed the 3% line before. And the whole move rests on an ECB decision that has not been taken. If September brings no increase, the forward pricing embedded in this rate unwinds and the monthly average follows it down. What will not unwind quickly is the gap between Spanish incomes and Spanish prices — that has been widening for four years, through every direction the Euribor has taken.
Sources: idealista/news https://www.idealista.com/news/finanzas/hipotecas/2026/08/21/910860-el-euribor-diario-rompe-la-barrera-del-3-y-marca-maximos-de-dos-anos; euribor-rates.eu https://www.euribor-rates.eu/en/current-euribor-rates/4/euribor-rate-12-months/; Demócrata https://www.democrata.es/economia/euribor-hoy-21-agosto-2026-supera-3-hipotecas/