First-Time Home Buyers GST Rebate (Bill C-4) — Up to $50,000 on New Construction in 2026

Royal Assent on March 12, 2026, Bill C-4 creates a new federal GST rebate of up to $50,000 for first-time buyers of new construction homes. Conditions, concrete examples, and how to stack with Quebec's $5,875 home ownership access credit.

A new federal program targeting new construction

On March 12, 2026, Canada's Parliament gave Royal Assent to Bill C-4 ("Making Life More Affordable for Canadians Act"), creating a new federal GST rebate dedicated to first-time buyers of new construction homes. The rebate can reach $50,000 — equivalent to 100% of the GST paid on the first $1,000,000 of an eligible new construction purchase.

This rebate is significantly more generous than the pre-existing GST new housing rebate (capped around $6,300 at $350,000). It is specifically targeted at first-time buyers purchasing new construction, and it stacks with the new Quebec home ownership access tax credit (up to $5,875 on the welcome tax, retroactive to January 1, 2026).

For a Quebec first-time buyer targeting new construction, the federal + provincial 2026 stack can represent tens of thousands of dollars in support. This guide explains how it works, who qualifies, and how to leave nothing on the table.

What Bill C-4 changes concretely

Before Bill C-4, the GST new housing rebate in Canada was limited: 36% of GST paid on the first $350,000 (practical cap of about $6,300), with phase-out between $350,000 and $450,000, and zero above. This rebate still exists and remains accessible to subsequent buyers (non-first-time buyers).

Bill C-4 adds a separate rebate dedicated to first-time buyers: up to 100% of GST on the first $1,000,000 of the purchase. Concretely, on a new condo at $750,000, GST is $37,500 — an eligible first-time buyer recovers 100% of this amount via the Bill C-4 rebate.

For purchases between $1,000,000 and $1,500,000, the rebate is progressively reduced per the official Bill C-4 formula (parl.ca verbatim text): Rebate = C × ((1,500,000 − Price) ÷ 500,000), where C = min($50,000, GST paid). Example: $1,250,000 home with $62,500 GST → C = $50,000 (cap), factor = (1,500,000 − 1,250,000) ÷ 500,000 = 0.50, rebate = $50,000 × 0.50 = $25,000. At $1,500,000 and above, the rebate is zero.

Who qualifies?

Three conditions must be met simultaneously:

Bill C-4 timing conditions: (1) agreement signed AFTER March 19, 2025 AND BEFORE January 1, 2031; (2) construction substantially completed BEFORE 2036. The rebate does not require the property to be in a particular price range up to $1,000,000. Above, the phase-out band $1M – $1.5M applies, then the rebate becomes zero at $1.5M.

Three concrete scenarios

To visualize the impact, three buyer profiles we regularly see at Anthony King:

Strategic consequence: if you target new construction and have flexibility on purchase price, staying below the $1,000,000 threshold maximizes both supports. Above, the federal advantage decreases progressively and the Quebec advantage disappears at $1M.

How to claim the Bill C-4 rebate

Unlike the Quebec credit (claimed via the income tax return), the federal GST rebate is generally claimed via the Canada Revenue Agency (CRA) form. The exact mechanism depends on who pays the GST initially:

1. Step 1 — Determine whether GST is included in the listed price. For new construction, GST is often listed separately. Ask the builder or your broker for confirmation.
2. Step 2 — If the builder applies the rebate at source (frequent case for builders familiar with the program), you pay the net-of-GST price at signing. The builder then recovers the rebate from the CRA.
3. Step 3 — If you pay the full GST at signing, you must claim it yourself via form GST190 (or the Bill C-4-updated version) from the CRA after occupancy.
4. Step 4 — Keep all your supporting documents: purchase agreement, GCR certification, notarial deed, GST invoices. The CRA may require these documents to validate the rebate.

Practical timing: if the builder applies it at source, the benefit is immediate at signing. If you claim it yourself, count 8 to 16 weeks after filing the form to receive the refund.

Stacking with Quebec's home ownership access credit

For a Quebec first-time buyer targeting new construction, the two programs stack:

• Bill C-4 rebate (federal): up to $50,000, on GST, on new construction of $1M or less (phase-out $1M to $1.5M)
• Home ownership access tax credit (Quebec): up to $5,875, on the municipal welcome tax, on first principal residence (new OR existing) under $1M
• QST new housing rebate (Revenu Québec): partial QST refund on the first portion based on thresholds, applicable also to non-first-time buyers
• FHSA + HBP + 30-year amortization (on insured loan for first-time buyer or new construction): complementary down-payment and qualification programs

On a new $400,000 condo for a first-time buyer, the federal + provincial + municipal stack can represent $25,000 to $30,000 in real savings, not counting the FHSA and HBP tax advantages that unfold over several years. See our synthesis guide for details: /credit-acces-propriete.

The broker angle — why this changes new construction strategy

For a first-time buyer targeting new construction, Bill C-4 changes two things in purchase strategy:

• First, the $1,000,000 threshold becomes an important fiscal boundary. Above, the federal advantage decreases progressively and the Quebec advantage disappears. If you have flexibility on price, staying below $1M can represent $5,875 + a meaningful portion of the additional $50,000.
• Second, the claim mechanism (at source via builder vs. via CRA after occupancy) changes your cash needs at signing. Confirm with the builder as early as the offer to purchase: is the rebate applied at source, or must you pay the full GST and recover it later?

At Anthony King — Architectes Hypothécaires, we systematically integrate Bill C-4 in the financial planning of every first-time buyer file targeting new construction. You obtain: confirmation of your eligibility, exact calculation of combined federal + provincial support, and a cash-flow timeline that accounts for when each rebate arrives.

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