You will be deducted 5 pct of the sale amount. ie 12,500 Euros on a 250,000 Euro sale. You can reclaim this if it is greater than 35pct tax on the gain. ie bought for 150,000 sold for 250,000 Capital Gains would be 35,000 Euros ( less any off sets ) like Lawyers fees, Estate agents fees. So in this case its better to run away having 12,500 taken from you at completion of sale. But it may be difficult to buy in Spain again.