The Short Answer: Yes, With Conditions

You can use your First Home Savings Account (FHSA) to purchase a duplex in Ontario — as long as you intend to occupy one of the units as your primary residence. The FHSA does not distinguish between a single-family home and a multi-unit property. What matters is that you are a first-time home buyer (haven't owned a primary residence in the past 4 calendar years) and the property will be your principal place of residence.

FHSA Rules and Limits

Annual contribution limit: $8,000. Lifetime contribution limit: $40,000. Tax treatment: contributions are deductible (like an RRSP) and withdrawals for qualifying home purchases are tax-free (like a TFSA). Unused room carries forward by one year. The account must be open for at least one calendar year before you make a qualifying withdrawal. Funds not used for a first home purchase can be transferred to your RRSP or RRIF without tax consequences.

Stacking FHSA with the RRSP Home Buyers' Plan

The FHSA and RRSP Home Buyers' Plan (HBP) can be used together on the same purchase. HBP allows first-time buyers to withdraw up to $35,000 from their RRSP tax-free for a qualifying home purchase, repayable over 15 years. Combined with FHSA: up to $75,000 in registered savings available for your duplex down payment. This is a powerful first-time buyer advantage that most renters in Ontario are not maximizing.

The Income Split Strategy

If you're buying with a partner, both of you can contribute to separate FHSAs if you're both first-time buyers — potentially $80,000 combined. Some couples also use a spousal RRSP strategy to optimize the HBP withdrawal between higher and lower income earners for maximum tax efficiency. Consult a fee-only financial planner before executing — the savings can be significant.

Practical Considerations for Duplex Buyers

When using FHSA funds for a duplex, you must move into one unit as your primary residence within one year of closing. You cannot later claim the entire property as your primary residence for capital gains exemption purposes — only the portion you actually occupy. This is relevant for eventual sale tax planning. Discuss the long-term implications with your accountant before purchasing.