On March 31, 2014 it will cost a $1.00 to mail an envelope in Canada up from 63-cents.
If you buy a booklet of stamps, the price will be 85-cents up from 63-cents.
Canada Post has indicated this cost increase was necessary because of the declining volumes of letter mail. They add that single stamp purchases at a $1.00 per stamp only account for 2% of total stamp sales.
Canada Post says this increase will cost the average household less than $5 per year.