The survey, compiled for BMO by Leger Marketing, found 43 per cent believe an interest hike would either hamper their ability to pay or leave them on unsure footing.
But the report also found 57 per cent of respondents believe they could still afford their home if interest rates spiked two per cent.
The survey results come as some of Canada's biggest banks begin raising variable mortgage rates, even though the Bank of Canada's overnight interest rate remains unchanged.
That could signal the era of cheap borrowing that has encouraged many Canadians to take on houses they may not have been able to otherwise afford.
BMO anticipates that the Bank of Canada will begin increasing interest rates from the current one per cent next year.
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