To calculate buying someone out of a house in Canada, take the home’s current market value, subtract the mortgage balance and any other debts secured against the property, and divide the remaining equity by each owner’s share. The party keeping the home pays the departing owner that share. The formula is simple; the adjustments are where the real work happens. Unequal down payments, renovations funded by one owner, HELOC balances, mortgage prepayment penalties, and, for separating spouses, provincial family property rules can all move the final figure by tens of thousands of dollars.
Step One: Agree on the Home’s Market Value
Every calculation flows from one number. If the two sides disagree on what the home is worth, everything downstream is contested.
A certified appraiser gives a formal written opinion based on an interior and exterior inspection, recent comparable sales, condition, and replacement cost. A standard residential appraisal in Canada typically costs between $350 and $650, with complex or rural properties running higher. In contentious separations, each side sometimes hires their own appraiser and then negotiates from the two figures or splits the difference.
A comparative market analysis from a real estate agent is cheaper and faster: the agent reviews recent sales of similar homes and adjusts for differences in size, age, and condition. A CMA is fine for a rough check but carries less weight in a dispute because it is an informal estimate rather than a licensed appraisal. If there is any chance the buyout amount will be contested, pay for the appraisal.
Step Two: Work Out the Equity
Equity is the home’s value minus everything registered against it. Subtract the outstanding mortgage balance, any home equity line of credit, and any other liens from the agreed market value. Apply the ownership split to what’s left. For a 50/50 split, each party’s share is half. If a co-ownership agreement or court order sets a different split, use those proportions.
A worked example:
- Agreed market value: $750,000
- Outstanding mortgage: $320,000
- HELOC balance: $30,000
- Total equity: $400,000
- Departing owner’s 50% share: $200,000
That $200,000 is a starting figure. In most buyouts it will be adjusted before the parties sign.
Should You Deduct Notional Selling Costs?
One negotiation point catches people off guard: whether hypothetical selling costs come off the equity before it is split. If the home were actually sold, both owners would pay real estate commission (typically 3% to 7% of the sale price in Canada), legal fees, and closing costs. A buyout avoids those expenses. Some parties argue the departing owner should not receive a windfall from costs that were never incurred; others take the position that the departing owner is entitled to their full share without any deduction. There is no universal rule. Whether a notional commission is deducted is a matter for negotiation, or, in a separation, for the agreement or court order to spell out.
Step Three: Adjust for Unequal Contributions and Debts
A straight equity split rarely captures reality. Contributions that were not shared equally need to be reflected in the final number, and missing these adjustments is one of the biggest sources of buyout disputes.
- Unequal down payments. If one party put $80,000 into a $100,000 down payment, they have a stronger claim to a larger share of the equity than a flat 50/50 split provides.
- Renovations and capital improvements. A party who funded a $50,000 basement renovation may be entitled to credit for that investment, especially if the work lifted the market value.
- Ongoing costs. If one party paid a disproportionate share of property taxes, insurance, or maintenance during the ownership period, those contributions can factor in.
On the debt side, any HELOC or second mortgage secured against the property has to be paid off at or before closing. The lender will require full payoff when title changes hands, so the outstanding balance, accrued interest, and any discharge fees come out of the equity before division. If the HELOC funded shared expenses, both owners typically absorb the cost equally. If one party ran up the balance for personal spending, the other can argue that the full amount should come off the borrower’s share.
How a Separation or Divorce Changes the Math
When the buyout is happening because a marriage or common-law relationship is ending, family law rules overlay the basic equity calculation. The rules vary by province, but the general principle across Canada is that the increase in value of family assets during the relationship is divided, not necessarily the assets themselves.
Equalization Payments
Several provinces, including Ontario, use “net family property” to determine what each spouse owes the other. Each spouse calculates the difference between what they owned on the date of separation and what they owned on the date of marriage, and the spouse with the higher net family property pays the other half the difference. The matrimonial home gets special treatment: its entire value on the date of separation is included in the calculation, even if one spouse owned it before the marriage. That rule alone can shift the buyout figure by tens of thousands of dollars compared to a simple equity split.
So a house buyout during separation is rarely just about the home. The buyout payment often gets folded into a broader equalization calculation where pensions, investments, and vehicles are also on the table. One spouse might accept a lower buyout figure on the home in exchange for a larger share of retirement savings. Getting legal advice on equalization before settling on a number is not optional if real money is at stake.
Section 73 Rollover Between Spouses
When property transfers between spouses or former spouses in settlement of rights arising from their marriage, subsection 73(1) of the federal Income Tax Act allows the transfer to happen on a tax-deferred rollover basis. The transferor is treated as having disposed of the property at their adjusted cost base rather than at fair market value, so no immediate capital gain is triggered.1Canada Revenue Agency. Property Transfers After Separation, Divorce and Annulment The receiving spouse inherits that cost base, which matters if they later sell and need to calculate a gain at that point.
Mortgage and Refinancing Costs to Build In
A buyout almost always means the mortgage has to change. The departing owner’s name has to come off the loan, and the remaining owner has to qualify on their own. A signed transfer of title does nothing to remove someone from mortgage liability if the lender has not formally released them, so refinancing costs belong in the calculation from the start.
Refinancing Into One Name
The standard route is for the remaining owner to refinance the existing mortgage solely in their name. The lender will assess income, credit, and total debt load to decide whether that person can carry the payments alone. Under OSFI’s Guideline B-20, the borrower must qualify at the stress test rate: the higher of the mortgage contract rate plus 2%, or a 5.25% floor.2Office of the Superintendent of Financial Institutions. Minimum Qualifying Rate for Uninsured Mortgages The stress test can disqualify someone who could comfortably afford the actual monthly payment, so run the numbers early.
CMHC Spousal Buyout Program
For separating couples, CMHC offers mortgage loan insurance that treats a spousal buyout more like a purchase than a standard refinance. The key advantage is the loan-to-value ratio: CMHC allows financing up to 95% of the property’s value for owner-occupied homes of one to two units, compared with the 80% maximum that typically applies to a conventional refinance. That higher limit can make the difference for a spouse who has enough income to service the mortgage but not enough savings to hold a 20% equity position. The trade-off is the insurance premium. At 90.01% to 95% LTV, CMHC charges a 4% premium on the total loan, which is added to the mortgage balance.3Canada Mortgage and Housing Corporation. CMHC Purchase The maximum amortization for a CMHC-insured mortgage is 30 years.4Canada Mortgage and Housing Corporation. CMHC Home Start
Prepayment Penalties
Breaking the existing mortgage mid-term triggers a prepayment penalty in most cases. On a variable-rate mortgage, the penalty is usually three months’ interest, which is fairly predictable. On a fixed-rate mortgage, the penalty is typically the higher of three months’ interest or the interest rate differential, a formula that compares the contract rate to the lender’s current rate for the remaining term. IRD penalties can run into the tens of thousands of dollars, especially if rates have fallen since the mortgage was locked in. Ask the lender for the exact figure before committing to a buyout date. In some cases, waiting until a renewal date saves a substantial amount.
Taxes on the Transfer
Two Canadian tax rules govern most house buyouts, and most owner-occupied buyouts trigger little or no tax.
Principal Residence Exemption
If the home was the principal residence for every year the departing owner held an interest in it, the capital gain on their share is fully exempt under the principal residence exemption.5Canada Revenue Agency. Principal Residence and Other Real Estate The departing owner doesn’t receive “sale proceeds” in the ordinary sense, but the transfer of their interest is still a disposition for tax purposes. As long as the exemption covers the full period of ownership, no capital gains tax applies.
It gets more complicated when the property was not the principal residence for every year: rented out for a period, or one owner designated a different property for some years. A portion of the gain then becomes taxable, and the exemption formula prorates the tax-free amount based on the number of years designated plus one, divided by total years of ownership.
Spousal Rollover
For separating and divorcing couples, the section 73 rollover means the transfer itself does not create an immediate tax bill. The property moves at the adjusted cost base, deferring any gain until the receiving spouse eventually sells.1Canada Revenue Agency. Property Transfers After Separation, Divorce and Annulment If the receiving spouse continues to live in the home and later sells it, the principal residence exemption can potentially cover the full gain across both spouses’ ownership periods. Between these two rules, most spousal buyouts of a family home involve zero tax. Anyone with a rental history on the property or more than one property should get specific advice from a tax professional.
Land Transfer Tax
Several provinces charge a land transfer tax when property changes hands, and it can add thousands to a buyout. Ontario’s tax uses graduated rates starting at 0.5% on the first $55,000 of value and climbing to 2.5% on amounts above $2 million for residential properties. British Columbia, Manitoba, and other provinces with similar taxes have their own schedules.
For separating spouses, most provinces with a land transfer tax offer an exemption when the transfer happens under a separation agreement or court order. British Columbia, for example, exempts transfers between spouses or former spouses made under a written separation agreement or a Family Law Act court order.6Province of British Columbia. Property Transfer Tax Exemption Codes Ontario has a similar provision for interspousal transfers. Buyouts between co-owners who are not spouses, such as business partners or siblings, generally do not qualify, and the full tax is owed. Confirm with a lawyer in the relevant province before assuming any exemption applies.
Closing the Transfer
Once the buyout amount is settled and financing is arranged, a real estate lawyer (or a notary in Quebec and British Columbia) prepares the transfer of land document, runs title searches to confirm there are no unexpected liens, discharges the old mortgage, registers the new one, and files the ownership change with the provincial land titles office. Legal fees for a straightforward transfer generally run $500 to $1,500, with disbursements adding a few hundred dollars more.
In a separation, the buyout terms belong in a separation agreement signed before the title transfer: the amount, payment timeline, responsibility for debts, and what happens if the remaining spouse cannot secure financing by the agreed date. Each party should have independent legal counsel review it. And the departing owner should confirm two things before treating the buyout as complete: that their name is off the title at the land titles office, and that the lender has issued a written release from the mortgage. A title transfer alone does not remove mortgage liability. Until the loan is refinanced or the lender releases them in writing, the departing owner remains on the hook if payments are missed.