The first repayment is required on the tax return two years after the withdrawal year.
Example: If you make a withdrawal in June 2016, your first repayment will be required for the 2018 taxation year. You’ll have until March 1, 2019, to make your contribution and make your first HBP repayment.
The repayment amount will be equivalent to 1/15th of the amount withdrawn, and so on for the next 14 years.
See the Canada Revenue Agency HBP guide for more information.