18 months through the e-gov site. I have been trying to pay this month bill and have attempted many time but in most case it says "page not found". On one occasion I got a page that says that the site is shutdown for maintainence. So, it seems that they are doinh something with the site but wow the amount of time its taking in amazing.

It seems that nobody in Qatar Government is aware of 24*7 availability and that down time should be minimal.