Calculator
How much FHSA room do you actually have?
Room starts the year you open the account, not the year you became eligible — and unused room carries forward only one year. That ceiling is what makes opening it early worth doing.
Open it before you can afford to fund it.
An unfunded FHSA still accrues a year of room, and it costs nothing to hold. If a first home is anywhere in the plan, this is the cheapest twenty minutes available to you.