# Buying a Home From Your Parents Below Market Value in Canada

> How lenders, CMHC, and CRA treat intra-family home sales below fair market value — LTV on appraised value, deemed disposition rules, and down-payment mechanics.

Category: Purchase
Last verified: 2026-04-20
Source: https://ratellow.com/scenarios/child-buying-parent-home-below-market-canada

## Who this is for
Adult children purchasing a parent's principal residence or investment property at a negotiated price below fair market value, typically to facilitate an affordable transfer of family wealth.

## Summary
When a parent sells a home to an adult child below fair market value, lenders underwrite the mortgage against the appraised value — not the agreed sale price — which means the discount functions as equity, not as a reduced purchase. CRA simultaneously treats the parent as having disposed of the property at fair market value regardless of the agreed price, triggering capital gains exposure on any accrued gain. Structuring the transaction correctly across the mortgage, tax, and title layers requires coordinating a lender-ordered appraisal, a gift-of-equity letter, and legal advice on the deemed disposition before the deal closes.

## Worked example
A parent owns a home with a current appraised value of $800,000 and an adjusted cost base of $300,000. They agree to sell to their adult child for $640,000 — a $160,000 discount. The child has $32,000 in liquid savings and no other real property. The lender orders an independent appraisal confirming $800,000 FMV.

- Agreed sale price: $640,000
- Appraised FMV (lender basis): $800,000
- Gifted equity (discount treated as equity): $160,000 (20% of appraised value)
- Mortgage required: $608,000 (76% LTV on appraised value — conventional, no CMHC premium)
- Parent's deemed capital gain: $500,000 ($800k FMV minus $300k ACB) — taxable at 50% inclusion rate on the gain above any principal residence exemption

## Framework
### How lenders calculate LTV on a non-arm's-length sale
Under OSFI Guideline B-20, federally regulated lenders must use the lesser of the purchase price or appraised value for LTV on arm's-length transactions. For non-arm's-length transactions — which explicitly include sales between family members — lenders use the appraised value as the property value basis regardless of the agreed price. The discount between the agreed price and appraised value is treated as gifted equity and counts toward the borrower's down payment. In the worked example, the child's $32,000 cash plus $160,000 gifted equity equals $192,000 — 24% of the $800,000 appraised value — producing a conventional (uninsured) mortgage at 76% LTV. No CMHC premium applies because LTV is below 80%.

### CMHC and insurer treatment of non-arm's-length purchases
CMHC, Sagen, and Canada Guaranty all classify intra-family sales as non-arm's-length transactions and apply heightened documentation requirements. An independent appraisal ordered by the lender (not the borrower) is mandatory — a realtor CMA or owner estimate is not acceptable. The gifted equity must be confirmed by a gift letter from the selling parent stating no repayment is expected, consistent with the standard gifted down-payment framework. If the resulting LTV after gifted equity exceeds 80%, the mortgage becomes high-ratio and CMHC insurance applies at the standard premium tiers (4.00% at 90.01–95% LTV, 3.10% at 85.01–90%, 2.80% at 80.01–85%). The December 2024 reform raising the insured cap to $1.5M means properties up to that threshold can still access insured financing if LTV warrants it.

### CRA deemed disposition and the principal residence exemption
CRA's deemed disposition rule under the Income Tax Act treats any transfer of property between non-arm's-length parties as occurring at fair market value, regardless of the agreed price. The parent cannot reduce their proceeds below FMV to minimize capital gains. If the property was the parent's principal residence for every year of ownership, the principal residence exemption (PRE) shelters the entire gain and no tax is owed. If the parent owned the property for years during which it was not their principal residence — for example, a rental period or a secondary property — the unsheltered portion of the $500,000 gain is included in income at the applicable inclusion rate. As of 2025, the federal capital gains inclusion rate is 2/3 for gains above $250,000 annually for individuals (the 2024 budget proposal). Legal and tax advice is essential before setting the sale price.

### Structuring the gift-of-equity correctly
The gifted equity letter must be signed by the selling parent, addressed to the lender, and state: (1) the dollar amount of the gift, (2) that it represents the difference between the agreed sale price and the appraised FMV, (3) that no repayment is required or expected, and (4) that the gift is not a loan secured against the property. Most lenders also require the gift to be reflected in the Agreement of Purchase and Sale — the sale price and the gifted equity amount must reconcile to the appraised value. Some lenders require the gift letter to be notarized; others accept a witnessed signature. Confirm the lender's specific format before drafting. The child's own cash contribution (here, $32,000) must be verified by 90 days of bank statements showing the funds were not borrowed.

### Land transfer tax and first-time buyer rebates
Land transfer tax (LTT) is calculated on the agreed sale price in most provinces, not the appraised value — a meaningful saving when the discount is large. In Ontario, the provincial and Toronto municipal LTT rebates for first-time buyers apply to the first $368,000 and $400,000 of purchase price respectively, and the child qualifies as a first-time buyer if they have never owned a principal residence. British Columbia's Property Transfer Tax applies to the fair market value, not the agreed price, which eliminates the LTT saving on the discount in BC. Quebec and Alberta use the agreed price. Confirm the applicable provincial rule with a real estate lawyer before finalizing the sale price.

### Mortgage qualification mechanics for the child buyer
The child qualifies for the mortgage on their own income and credit profile — the parent's financial strength is irrelevant unless they co-sign. The stress test under B-20 applies at the greater of the contract rate plus 200 bps or 5.25% (the current floor as of 2026). At a 5-year fixed rate of approximately 5.00–5.25%, the qualifying rate is 7.00–7.25%. GDS and TDS limits are 39% and 44% respectively for insured mortgages; uninsured lenders typically apply the same ratios but have more discretion. If the child's income alone cannot service the mortgage, a co-signer or guarantor arrangement is possible, but the parent-seller cannot simultaneously be the co-signer on the same transaction at most lenders — this creates a conflict-of-interest flag in underwriting.

## Key considerations
- The parent must obtain independent legal advice before signing the Agreement of Purchase and Sale. A lawyer acting for both parties in a non-arm's-length transaction creates a conflict of interest and is prohibited in most provinces.
- If the parent has an existing mortgage on the property, it must be discharged or ported at closing. The discharge penalty — particularly an IRD penalty on a fixed-rate mortgage in a declining-rate environment — can materially affect the economics of the transaction and should be calculated before the sale price is set.
- CRA can reassess the transaction if the sale price is set below FMV and the parties cannot demonstrate the appraised value was independently established. A lender-ordered appraisal from a CREA-designated appraiser provides the strongest contemporaneous evidence of FMV.
- If the parent intends to continue living in the home after the sale (a life-interest or informal arrangement), lenders will treat this as a red flag for a non-arm's-length transaction and may decline or require additional documentation. Any formal life-interest arrangement must be disclosed upfront.
- Provincial homestead and matrimonial property rules may require spousal consent to the sale even if the selling parent is the sole registered owner. This is particularly relevant in Alberta, Saskatchewan, and Manitoba under their respective Dower or Homesteads Acts.

## Common mistakes
- Setting the sale price without first ordering an appraisal — if the agreed price is later found to be below a defensible FMV, CRA can reassess the parent's capital gain upward and the lender's LTV calculation becomes unreliable.
- Treating the gifted equity as a loan with informal repayment expectations — if CRA or the lender discovers a side agreement for repayment, the gift is reclassified as a loan, the down payment fails verification, and the mortgage approval collapses.
- Failing to account for the parent's mortgage discharge penalty before finalizing the sale price — an IRD penalty of $15,000–$40,000 on a mid-term fixed mortgage can eliminate the financial benefit of the below-market price.
- Assuming the child qualifies as a first-time buyer for RRSP Home Buyers' Plan purposes without confirming they have not owned a principal residence in the preceding four calendar years — the HBP lookback period disqualifies recent prior owners.
- Using a single lawyer for both buyer and seller — most provincial law societies require independent representation in non-arm's-length transactions, and a single lawyer cannot provide independent advice to both parties on the same deal.
- Overlooking BC's Property Transfer Tax FMV basis — buyers in BC who expect LTT savings from the discounted price will find the PTT is assessed on appraised FMV, not the agreed price, eliminating that planning benefit.

## Action steps
1. Commission an independent CREA-designated appraisal of the property before setting the sale price — this establishes the FMV baseline for both the lender's LTV calculation and CRA's deemed disposition.
2. Have the selling parent consult a tax accountant to calculate the capital gains exposure and determine whether the principal residence exemption fully shelters the gain before agreeing to any price.
3. Retain separate real estate lawyers for buyer and seller — confirm both are experienced with non-arm's-length transactions and can draft the gift-of-equity letter in the lender's required format.
4. Engage a mortgage broker with documented experience in non-arm's-length files to pre-screen lender policies — not all lenders accept gifted equity from a seller-parent, and policy varies materially across prime lenders and monolines.
5. Verify the child's 90-day bank statement history shows the cash contribution was not borrowed — any recent large deposits will require a paper trail, and borrowed down payments are prohibited under CMHC and B-20 rules.
6. If the property is in BC, recalculate the LTT exposure using FMV rather than the agreed price, and confirm whether the First Time Home Buyers' Program exemption threshold ($835,000 as of 2025) applies to the FMV or the agreed price.

## Sources
- Guideline B-20 — Residential Mortgage Underwriting Practices and Procedures — https://www.osfi-bsif.gc.ca/en/guidance/guidance-library/final-revised-guideline-b-20-residential-mortgage-underwriting-practices-procedures
- Mortgage Loan Insurance — Homeownership — https://www.cmhc-schl.gc.ca/professionals/project-funding-and-mortgage-financing/mortgage-loan-insurance/mortgage-loan-insurance-homeownership-programs
- Principal Residence Exemption — https://www.canada.ca/en/revenue-agency/services/tax/individuals/topics/about-your-tax-return/tax-return/completing-a-tax-return/personal-income/line-12700-capital-gains/principal-residence-other-real-estate/principal-residence.html
- Non-Arm's Length Transactions — https://www.canada.ca/en/revenue-agency/services/tax/businesses/topics/payroll/benefits-allowances/automobile/non-arms-length-transactions.html
- Mortgage — Down Payment — https://www.fcac-acfc.gc.ca/Eng/financial-literacy/life-events/buying-home/Pages/down-payment.aspx