Question Summary:
Is it permissible to pay Zakat in advance?

Question Detail:

 I would like to know if i could give zakat in advance.

Answer :

In the Name of Allah, the Most Gracious, the Most Merciful.
As-salāmu ‘alaykumwa-rahmatullāhiwa-barakātuh.
Yes, it is permissible to discharge zakat in advance on condition that one’s wealth reaches the threshold of zakat and on condition that one fulfils all the conditions of zakat.
For more information on zakat consider the links below:
http://www.askimam.org/public/question_detail/17114
http://www.askimam.org/public/cat_fatwa_details/71
And Allah Ta’āla Knows Best
Zakir Husain
Student DarulIftaa
Michigan, U.S.A 
Checked and Approved by,
Mufti Ebrahim Desai
                                                       ) الباب في شرح الكتاب ٢/٣٣٧ ( وان قدّم الزكوة على الحول، وهو مالك للنصاب:جاز  (1)