There are several rebate programs running at once, and the interaction between them is where costly mistakes happen.
If you qualify for both the enhanced rebate and the Ontario First-Time Home Buyers’ rebate, you may claim either or both — but the total of all rebates for the 8% provincial portion cannot exceed the lesser of $80,000 and the provincial HST actually payable on your purchase.
In plain terms: you can draw on both programs, but they share one $80,000 ceiling on the provincial side. They do not stack to $160,000.
You may also see the mix shift between programs without your total changing — more arriving as federal rebate, less as Ontario top-up, or the reverse, with the same combined figure at the end.
Why this matters practically: if someone has told you the programs add together, that advice is wrong, and it may be driving a purchase decision. Get the number right before you commit, not after closing.