Ontario plans to rebate the full 8% provincial portion of the HST on most new homes up to $1 million for first-time buyers, offering up to $80,000 in savings. Combined with the federal 5% HST removal, savings could reach $130,000. The rebate applies to new or substantially renovated primary residences, phasing out for homes between $1 million and $1.5 million, aiming to boost affordability and home construction.