ngelsa said:
$1040 for single applicant and pay at the time when you submit your PR application post ITA.
To add to ngelsa's helpful post: that's 550 CAD fee for assessment of your application (non-refundable) plus 490 CAD for the right of permanent residence (refundable, may pay this fee after a positive decision has been made). For more info, check out these links:
http://www.cic.gc.ca/english/information/fees/fees.asp
http://www.cic.gc.ca/english/immigrate/skilled/apply-how.asp (bullet point 3: "Pay your fees")