Can anyone tell me the cost for full time studies in sociology? Does it go up gradually each year? If someone can give me the 2013/14 cost for 2/3/4 year or any of those years thatd be amazing, cheers.

Google "mcmaster student accounts and cashiers" and go from there. It has the tuition on a per-unit basis for every program for both domestic and international students.
The chart I'm thinking of doesn't include ancillary fees, but those should be available elsewhere online.

Plus tuition increases are capped at 4% per year, so that's a pretty good guideline for guesstimating future tuition expenses.

Thanks guys. Just as a point of reference, can any soc students tell me how much they paid this year??

It varies depending on what year you're in, too. Someone in fourth year this year probably isn't paying as much as someone in first year this year, even in the same faculty with the same course load.

All of the information is on the Student Accounts and Cashiers website.