How Euribor affects your mortgage: ups, downs and how to protect yourself

Euribor is the interest rate at which European banks lend money to each other. If you have a variable-rate mortgage or are thinking of taking one out, Euribor directly determines how much you pay each month. Here's the practical explanation you need.

How Euribor feeds into your mortgage

If you have a variable-rate mortgage, your rate is "Euribor + margin" (the diferencial). For example, Euribor + 0.80%. The payment is usually reviewed every year using the average value of Euribor in the month before the review.

Example: a €200,000 mortgage over 30 years at Euribor + 0.80%. With Euribor at 2.5%, the total rate is 3.3% → €872/month. With Euribor at 4%, the rate is 4.8% → €1,049/month. Difference: €177/month or €2,000/year.

Strategies to protect yourself

• Switching to a fixed-rate mortgage: Removes the uncertainty completely, as long as the cost of the subrogación (transferring the mortgage to another bank) is affordable.
• Partial early repayment: When Euribor is high, paying down capital reduces the balance on which the payment is calculated.
• Temporarily extending the term: Reduces the monthly payment, although it increases the total cost.

Also read: The best mortgages in Spain in 2026. Use RadarPro to work out the impact of different Euribor scenarios on your investment.