What is the process for paying zakat for past years?

It is recommended to go back to each of the points in time that Zakat was missed. Then look at your account statements and determine how much wealth you had including cash, cash assets, gold, silver, etc. Based on this you can with reasonable accuracy calculate how much Zakat was supposed to be paid in those missed years. If you cannot get access to statements from those previous years, then please make a good approximation to the best of your ability. Allah knows best. National Zakat Foundation provides a one-on-one service in this area.

Email zakat@nzfcanada.com to set up an appointment for missed Zakat calculations.