Migrant Costs.

£17bn, the true cost of immigration to the UK every year: Figure calculated as gap between amount migrants pay in taxes and consume in public services 

The figure includes a £1.2billion annual net cost of migrants from Europe, who consume far more in public services and benefits than they pay in taxes. 

http://www.dailymail.co.uk/news/article-3593872/17bn-true-cost-immigration-UK-year.html