- When you select upgrades or options through the builder — whether they’re structural (an extra bathroom, a finished basement) or cosmetic (upgraded flooring, countertops, cabinetry) —…
- "Décor dollars" — a credit or allowance the builder gives you to spend at their design centre — are usually treated as part of the overall purchase price for HST purposes as well, rather…
- The picture changes once you step outside the builder’s purchase agreement.
Buying pre-construction or a new build almost always comes with an upgrade sheet — hardwood instead of laminate, an extra bathroom, quartz counters, or a "décor dollars" allowance to spend at the builder’s design centre. It’s easy to think of these as add-ons that live outside the "real" purchase price. For HST purposes, that’s usually not how they’re treated.
If you’re budgeting a new-build purchase and trying to figure out what your final number actually looks like once upgrades are added, understanding how HST applies to them is part of getting that number right.
The General Rule: Upgrades Bought Through the Builder Are Part of the Price
When you select upgrades or options through the builder — whether they’re structural (an extra bathroom, a finished basement) or cosmetic (upgraded flooring, countertops, cabinetry) — and they’re added to your purchase agreement, they generally become part of the total consideration you’re paying the builder for the home. Because the sale of the home itself is a taxable supply, the upgrades bundled into that same purchase agreement are typically taxed the same way as the base price, not treated as a separate, differently-taxed transaction.
In practical terms: if HST applies to your new home purchase, it generally applies to the full contract price, including builder-selected upgrades, not just the base model price advertised when you first looked at the floor plan.
Décor Dollars and Design Allowances
"Décor dollars" — a credit or allowance the builder gives you to spend at their design centre — are usually treated as part of the overall purchase price for HST purposes as well, rather than as a separate discount or rebate that sits outside the taxable amount. In other words, using a décor allowance toward upgrades doesn’t generally create a category of spending that avoids HST; it’s typically folded into the same taxable consideration as the rest of the purchase.
What’s Different: Work Done Outside the Purchase Agreement
The picture changes once you step outside the builder’s purchase agreement. If, after closing, you hire an independent contractor to do renovation work the builder never touched — refinishing a basement yourselves, adding custom built-ins, swapping out fixtures — that’s a separate supply from a separate vendor. It’s taxed on its own terms as a standalone transaction between you and that contractor, not as part of your original home purchase.
Comparing the Two Paths
| Upgrades through the builder’s purchase agreement | Renovation work after closing, outside the agreement | |
|---|---|---|
| Who you’re contracting with | The builder, as part of the original purchase | An independent contractor or tradesperson |
| How it’s taxed | Generally part of the total purchase price for HST purposes | A separate taxable supply on its own invoice |
| Does it affect your New Housing Rebate calculation? | Potentially — it affects the total price used in the rebate analysis | Generally not connected to the original home purchase’s rebate |
| Where it shows up | Your Agreement of Purchase and Sale and its schedules | A separate contract and invoice with the tradesperson |
Why This Can Matter for Your Rebate
Because upgrades bought through the builder generally increase your total purchase price, and rebate eligibility and amounts can be affected by the price of the home, a heavily upgraded purchase may land in a different position than the base model would have. This is another reason not to treat your upgrade sheet as separate from the "real" price when you’re estimating your total cost — it’s part of the same number your rebate (if any) is calculated against. Because current rebate figures and thresholds are unusually unsettled as of mid-2026, this article doesn’t state specific dollar amounts; confirm the current numbers, and how your particular upgrade package affects them, with your lawyer or accountant before you finalize your selections.
Questions to Ask Before You Sign Off on Upgrades
- [ ] Does the purchase agreement or upgrade addendum clearly state whether the listed upgrade prices include or exclude HST?
- [ ] Does your décor allowance reduce the taxable price, or is it applied after tax is calculated on the full upgraded price?
- [ ] If you’re close to a price threshold that might affect rebate eligibility, does adding upgrades push you across it?
- [ ] Are any of the upgrades you’re considering better done independently after closing, rather than through the builder?
Frequently asked questions
Are appliance packages included in an upgrade sheet taxed the same way?
Generally, if the appliances are sold to you as part of the builder’s purchase agreement (built into the price rather than purchased separately from a retailer after closing), they’re typically treated as part of the same taxable purchase. If you buy appliances yourself after closing from a separate retailer, that’s a distinct transaction.
My builder quoted upgrade prices that seem to already include tax — how do I know?
Ask directly, and get it in writing. Upgrade sheets vary in how clearly they disclose tax treatment, and this is exactly the kind of ambiguity your lawyer should help clarify before you commit to a package.
Does it matter whether I pay for upgrades upfront or roll them into my mortgage?
How you finance the upgrades doesn’t generally change how they’re taxed — the HST treatment turns on what you’re buying and from whom, not on your payment method.
If I skip the décor dollars and take a price reduction instead, does that change anything?
It can be worth asking the builder to clarify how a straight price reduction versus a décor allowance is documented, since the two can be treated differently on paper even if the economic effect feels similar to you.
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