We're managing the website on a very low budget. I have four staff who actually manage it. There is no formal budget for the website. We spent a small amount of money on some market research to focus groups to just see what people think of the website and to try to improve its functionality, but it actually has no budget other than the staff time of the people who are managing it.
Of course, departments are all contributing information so there will be staff time in departments as well.