Is there a limit on how much monthly common expenses can be increased in condos act?
No, There is no maximum amount. Condos corporation , Every year is setting the budget for current operating expenses and reverse fund. AS your rights are protected you can consult with the condo board about the increase of common expenses. Read more on this:
http://www.sse.gov.on.ca/mcs/en/Pages/Condos.aspx