Canadians are allowed to contribute a specific amount to their TFSA each year, and unused contribution room can be carried forward to the current year. TFSA contribution room accumulates beginning with the first calendar year in which you turn 18. So if you turned 18 in 2009 or before and haven't yet opened a TFSA, your total contribution room is $52,000 as of 2017.
We also have a simple contribution tracker feature that helps you better keep track of your contribution room. You'll have to answer a couple questions to set it up. Learn more about how to set up TFSA contribution tracking here.
The maximum contribution limits for each year are:
You can read more about contributions on the Canada Revenue Agency website.