I don't have the statistics [0][1], but I would be very, very surprised, if the amount of money Slovakia is putting into the EU and Euro zone comes even close to the transfers they receive. Slovakia does not fund anything at all, they just receive a little bit less.

[0] Actually, here is some data for the EU (German): https://upload.wikimedia.org/wikipedia/commons/1/1b/Nettozah...

[1] And here is more: https://en.wikipedia.org/wiki/Budget_of_the_European_Union#N...