Good morning,
"When do I start making repayments
Your repayment period starts the second year after the year you withdrew funds from your RRSP(s) for the HBP."
http://www.cra-arc.gc.ca/tx/ndvdls/tpcs/rrsp-reer/hbp-rap/rpymnts/menu-eng.html#mkng_rpmtsThe link above is a great link on HBP from the CRA
