A $60,000 Withdrawal, A 15-Year Schedule, and a 1/15th Annual Floor
The dollar mechanics of the HBP are straightforward, and they explain why the grace-period extension is more meaningful than a tax-roundup summary suggests.
According to the Canada Revenue Agency, each year's minimum HBP repayment is calculated by dividing the remaining balance by the number of years left in the schedule. A participant who withdrew the full $60,000 starts with a minimum repayment of roughly $4,000 per year — one-fifteenth of the original balance. That number is the source of the federal government's "$4,000 per individual per year" cash-flow estimate, and it sits at the centre of the household-budget impact.
Three points are worth pulling out of the CRA mechanics, because they shape the trade-off the grace-period extension creates.
First, HBP repayments are tax-neutral. Designating an RRSP contribution as an HBP repayment does not generate a tax deduction, and it does not consume RRSP contribution room. The repayment simply restores funds the participant already deducted when they originally contributed.
Second, falling short of the minimum has a direct tax cost. If a participant repays less than the required minimum in a given year, the shortfall is added to that year's income as RRSP income. If they repay nothing, the full required amount is added to income. The HBP is built so the government collects either repayments or income tax — there is no third path.
Third, the grace period defers the schedule but does not extend it. Once the five-year grace ends and repayments begin in year five, the 15-year clock starts from there. The total repayment runway is still 15 years; the only thing that moves is when those years begin.
This is what makes the Spring Economic Update extension economically interesting rather than cosmetic. For a borrower with a $60,000 HBP balance, three additional grace-period years free up roughly $12,000 of cash flow that would otherwise need to land back inside an RRSP — without changing the eventual repayment burden in nominal terms, and without using up RRSP contribution room.