Canada's First Home Savings Account gives you $8,000 of room a year, up to $40,000 over its lifetime — and unused room (max $8,000) carries forward one year. Enter your carry-forward and what you've contributed to see your room, then project tax savings in the full FHSA calculator.
Up to $8,000 of unused room carries forward one year, so a year after opening you could have up to $16,000 of room. Beyond that it doesn't keep stacking.
What's the lifetime FHSA limit?
$40,000 in contributions over the life of the account. Investment growth on top of that isn't counted against the limit.