Common Reasons the CRA Denies an Ontario New Housing HST Rebate Claim

Buying or building a new home in Ontario usually means HST is baked into the price somewhere — either charged directly by the builder or triggered by construction rules if you built it yourself. A new housing HST rebate exists to return part of that tax to qualifying buyers, but CRA denies a significant share of claims every year, and almost never because the program doesn't apply to new construction generally. It's because the applicant tripped over one of a handful of recurring, technical conditions.

Knowing where those trip-wires sit — before you sign an Agreement of Purchase and Sale that assumes a rebate is coming, or before you file — can save you from an expensive gap between what your builder quoted and what you actually receive back.

As of mid-2026, new-home HST/GST relief in Canada is not one simple program. There's a long-standing federal/provincial rebate structure, a newer federal rebate aimed at first-time buyers, and a separate Ontario enhancement under discussion — each with its own conditions and dollar limits that change. This article describes the common denial patterns qualitatively; always verify the current dollar figures and thresholds with CRA or your lawyer before you rely on a specific number.

What CRA Is Actually Checking

At its core, CRA is testing whether the property genuinely functions the way the rebate requires — usually as the buyer's (or a close relation's) primary place of residence, or as a long-term rental under a separate rebate stream. The rebate is not a general "new home discount." If the facts on the ground don't match what the application claims, CRA can and does deny the claim, sometimes years after the money has already changed hands.

Top Reasons Rebate Claims Get Denied

1. The home wasn't actually used as intended. Claiming the owner-occupier rebate but then renting the unit out short-term, flipping it quickly, or never moving in is one of the most common denial triggers.

1. Missing or late paperwork. Rebate applications have a filing window tied to closing or occupancy. Buyers who assume the builder "took care of it" sometimes discover no application was ever filed, and the window to fix that has narrowed or closed.

1. Assignment sale confusion. When a pre-construction unit is assigned before final closing, it can be unclear who the eligible "purchaser" is for rebate purposes — the original buyer, the assignee, or neither, depending on how the assignment was structured.

1. Renting to a relative without meeting the rules. A parent buying a unit for an adult child, or vice versa, can qualify under certain conditions — but the relationship and occupancy have to line up with what CRA requires, not just with family intent.

1. Corporate or trust purchasers. Buying through a corporation, holding company, or certain trust structures can disqualify a purchase from the individual-owner rebate stream entirely, even if a person will personally live there.

1. Fair market value near or above the phase-out range. The federal rebate scales down and eventually disappears as a home's value climbs past a certain point. Buyers of higher-value new builds sometimes assume they qualify for a partial rebate when the price has already moved them out of range.

1. Confusing the different rebate programs. With a long-standing rebate, a newer first-time-buyer federal rebate, and a possible Ontario enhancement all potentially in play for the same purchase, applicants sometimes apply under the wrong program, use the wrong form, or claim an amount that mixes eligibility rules from two different regimes.

1. Incomplete supporting documentation. CRA typically wants to see the Agreement of Purchase and Sale, statement of adjustments, proof of occupancy or tenancy, and builder disclosures. A rebate can be delayed or denied purely on paperwork gaps, even where the underlying eligibility is sound.

What to Do If Your Rebate Is Denied

• Read the denial letter carefully. CRA will usually specify which condition it says wasn't met — that's your starting point, not a guess.
• Gather your original documentation. The APS, closing statement, occupancy date, and any lease agreements are the evidence that supports (or doesn't support) your position.
• Ask whether an objection is worthwhile. Some denials stem from a documentation gap that can be corrected; others reflect a genuine eligibility problem that a fresh filing won't fix.
• Get advice before your window closes. Objection and reapplication rights are time-limited, and acting early preserves options that disappear if you wait.

How a Real Estate Lawyer Helps Avoid These Mistakes

A lawyer reviewing your Agreement of Purchase and Sale before you sign can flag rebate-relevant terms — how the builder has priced HST into the deal, whether an assignment is contemplated, and what your closing documents will need to show later. That review happens months before any rebate application is due, which is exactly when it's most useful.

Frequently asked questions