HST on Home Renovations in Ontario: The 13% Nobody Should Hide

Check whether the renovation price you are comparing includes tax. For a taxable supply made in Ontario, the Canada Revenue Agency lists the HST rate as 13%. If an Ontario contractor quotes $40,000 before tax, the invoice total is $45,200. That difference matters when setting your spending limit.

The basic 13% renovation math

The tax normally applies to the contractor's taxable supply, including labour and materials that form part of it. It also applies to approved extras. If a $2,000 change order is written before tax, the added invoice is $2,260. This is why every allowance, credit, and change order should say how tax is treated.

A contractor may be a small supplier who is not required to register, or may have another valid tax status. That does not create a universal cash price with no HST coupon. Ask a business charging HST to show its registration number on the invoice. The CRA lists that number among the supporting information needed for input tax credits on sales of $100 or more; that documentation threshold is not a rule that smaller taxable purchases escape HST. You can use the CRA's free GST/HST Registry to check the first nine digits against the business name and transaction date.

What should appear on the paperwork

• The contractor's legal or operating name and contact information.
• A pre-tax subtotal, the HST rate and amount, and the after-tax total.
• The GST/HST account number where the invoice rules require it.
• A clear tax treatment for allowances, credits, deposits, and change orders.
• Paid receipts tied to the contract and invoice number, with payment references you can match later.

Keep the contract, drawings, change orders, invoices, proof of payment, and final approvals together. Those records matter for tax questions, insurance, resale, warranty, and any rebate application. Keep a digital copy as well as any paper originals. We keep the original invoice and the payment receipt together, rather than replacing one with a screenshot saying paid. The invoice explains the work and tax; the receipt shows the payment. When an owner asks about a change six months later, both pieces save a fair amount of inbox archaeology.

A regular renovation is not an HST rebate project

The phrase home renovation rebate causes trouble because it sounds broad. The CRA's new housing rebate guidance is not a refund for replacing cabinets, rebuilding one bathroom, finishing a basement, or installing a deck. For an owner-built substantial renovation, generally 90% or more of the existing home's interior must be removed or replaced, excluding listed structural elements.

A major addition can qualify in limited circumstances, but the CRA uses a much higher bar than we added a bedroom. Its guidance gives the example of an addition that at least doubles the living area, such as a full second storey on a bungalow. Eligibility also depends on occupancy, ownership, timing, value, and which federal or Ontario rebate is being claimed. Use an accountant who understands GST/HST housing rebates before building the budget around one.

The temporary 2026 Ontario enhanced rebate

Ontario introduced temporary enhanced relief for qualifying new or substantially renovated homes. For an owner-built home, the current CRA eligibility page says construction or substantial renovation generally must begin from April 1, 2026 through March 31, 2027, be substantially completed by the stated deadline, and satisfy the other Ontario new-housing conditions and value limit. This is useful, but it does not turn every 2026 reno into a rebate.

The CRA application guidance for owner-built homes says the owner files the forms and keeps the supporting construction summary. Do not let a salesperson casually subtract a hoped-for rebate from the contract total. Have eligibility confirmed before counting on a rebate.

HST, deposits, and the statutory holdback

A genuine deposit is not treated the same as a progress payment for tax timing. CRA guidance says GST/HST becomes payable when a deposit is applied as payment for the supply; merely calling an advance invoice a deposit does not settle its treatment. Holdback timing is more technical. CRA guidance on GST/HST and home construction has specific rules for when tax on a construction holdback becomes collectible. Your contract and invoices should show the base amount, HST, payments, and holdback in separate, clearly labelled lines.

For quote comparison, normalize every bid to the same after-tax scope. Our guide to reading an Ontario renovation quote covers allowances and exclusions; the Ontario holdback guide explains why the last 10% is not just a punch-list bargaining chip.