Spousal Buyout Mortgage: The 60% Rule That Decides Whether You Keep the House
A conventional refinance stops at 80% of value, so on an even equity split it fails the moment your mortgage passes 60% of what the house is worth. The insured spousal buyout reaches 95% - and then the stress test asks for $123,351 of single income.
Toronto, 22 October 2026 — If you are separating and want to keep the house, one number decides almost everything: your mortgage balance as a percentage of what the house appraises for. Above 60%, an ordinary refinance cannot raise enough to pay out your former spouse, because the 80% refinance ceiling bites before the payout is covered. A spousal buyout mortgage is the insured treatment that lifts that ceiling to 95% of appraised value. On a $620,000 home with a $420,000 joint mortgage it is the difference between a $496,000 maximum and a $589,000 one — $93,000 of extra room against a $24,000 shortfall. The price is a 2.80% insurance premium, $14,560 on that file, and a stress test at 6.34% that asks for $123,351 of single income.
Rates below are lowest-advertised aggregator figures for 22 October 2026, not quotes. The Bank of Canada policy rate is 2.25%, held since 29 October 2025 and confirmed on 2 September 2026; prime is 4.45%. The next decision, with a Monetary Policy Report, is 28 October 2026.
The 60% rule: when only a spousal buyout mortgage works
Call your appraised value V and your joint mortgage M. On an even split the payout owed is half of V minus M, so the mortgage you need is M plus half of (V minus M) — the average of V and M. A conventional refinance stops at 80% of appraised value. Set the amount needed equal to that ceiling and solve, and the threshold does not depend on the size of the house at all.
On a 50/50 split, a conventional refinance works only while your mortgage is 60% or less of your home's value. Above that you are short, and a spousal buyout mortgage is the only route that reaches. The insured ceiling itself fails above 90%.
| Share of equity owed to the departing spouse | Conventional refinance works while mortgage is under | Spousal buyout works while mortgage is under |
|---|---|---|
| 50% (even split) | 60.0% of value | 90.0% of value |
| 40% | 66.7% of value | 91.7% of value |
| 30% | 71.4% of value | 92.9% of value |
Calculated from the LTV ceilings, 22 October 2026. The conventional column runs backwards from intuition: the smaller the share you owe, the more mortgage you can carry and still refinance.
What a spousal buyout mortgage actually is
Not a product with its own rate sheet — an underwriting treatment. All three Canadian default insurers, CMHC, Sagen and Canada Guaranty, treat the transaction as a purchase rather than a refinance, so the 95% purchase ceiling applies instead of the 80% refinance ceiling.
Because it is insured, a spousal buyout mortgage carries the insured rules: a premium, a 25-year maximum amortization, and an appraised value below $1,500,000. The 30-year insured amortization introduced on 15 December 2024 is for first-time buyers and newly built homes, so it will not normally be available to you.
The conditions are narrow, and the file fails on any one of them:
- Both of you must be on title. A common-law partner never added to it generally cannot use a spousal buyout mortgage, however long you lived together.
- You need a signed separation agreement or court order, in place before closing, stating the agreed value, the equity split and every joint debt cleared.
- The property must be owner-occupied. A rental or investment property does not qualify.
- A current appraisal from an approved appraiser sets the value, and with it the payout and the maximum loan.
- Proceeds are restricted. CMHC limits funds to the equity payout. Sagen and Canada Guaranty generally also cover joint matrimonial debts and a prepayment penalty if the agreement names them.
That last point is where files go wrong. Money for anything the agreement does not name — a car, a cash cushion, your legal bill — must come from a conventional refinance, which brings the 80% ceiling back with it.
The worked file: a $620,000 home with a $420,000 mortgage
One spouse stays. The home appraises at $620,000 against a $420,000 joint mortgage — 67.7% of value, above the 60% threshold, so the conventional route is already closed. Equity is $200,000, split evenly, so the payout is $100,000 and the new mortgage must be $520,000.
| Route | Maximum loan | Amount needed | Result |
|---|---|---|---|
| Conventional refinance, 80% LTV | $496,000 | $520,000 | $24,000 short |
| Spousal buyout mortgage, 95% LTV insured | $589,000 | $520,000 | $69,000 of headroom |
At $520,000 the loan is 83.87% of value, inside the 80.01–85% premium band at 2.80%. The premium is $14,560, financed into the balance, for a total mortgage of $534,560. In Ontario the 8% provincial sales tax on it — $1,164.80 — is cash at closing and cannot be financed. At the best advertised insured five-year fixed rate of 4.34% on 22 October 2026, over 25 years, the payment is $2,911.28 a month, calculated with Canadian semi-annual compounding.
A higher appraisal is the only thing that fixes the conventional route
Because the payout rises at half the speed of the ceiling, a stronger appraisal closes the gap from both ends. On the same $420,000 balance the conventional refinance becomes possible at $700,000 of value — an $80,000 lift.
| Appraised value | Payout owed | Loan needed | 80% ceiling | Shortfall |
|---|---|---|---|---|
| $580,000 | $80,000 | $500,000 | $464,000 | $36,000 |
| $620,000 | $100,000 | $520,000 | $496,000 | $24,000 |
| $660,000 | $120,000 | $540,000 | $528,000 | $12,000 |
| $700,000 | $140,000 | $560,000 | $560,000 | nil |
Worth knowing before you agree a value: a low figure shrinks the cheque you write and raises the chance you cannot finance it.
The premium is the price of the extra room
Insurance is the real cost of the 95% treatment on a spousal buyout mortgage, and it scales in steps rather than smoothly.
| Loan-to-value band | Premium rate | Premium at that band on this file |
|---|---|---|
| 80.01% – 85% | 2.80% | $14,280 on a $510,000 loan |
| 85.01% – 90% | 3.10% | $16,430 on a $530,000 loan |
| 90.01% – 95% | 4.00% | $22,400 on a $560,000 loan |
Premium rates from a published CMHC schedule, 22 October 2026. Crossing 85% costs 30 basis points on the whole balance, so a small difference in appraised value can cost a four-figure premium on a spousal buyout mortgage. Ask for the band boundaries in dollars before the appraisal is ordered.
Financed at 4.34% over 25 years, the $14,560 premium adds $79.30 a month: over five years you pay $4,757.74 towards it and still owe $12,749.06 at renewal, a five-year cost of $17,506.80 plus $1,164.80 of tax at closing.
Selling instead costs $33,000 on a $620,000 property at 5% commission plus $2,000 of legal fees, before you move twice and buy back into the same market. The premium is roughly half that, which is the honest case for a spousal buyout mortgage: expensive, and usually the cheaper of two expensive options. Breaking your existing mortgage mid-term may add a penalty — see our explainer on how mortgage prepayment penalties are calculated.
The ceiling moves. The stress test does not.
This is where most spousal buyout mortgage files die, and it has nothing to do with loan-to-value.
You qualify on your own income now, at the greater of contract rate plus two points or 5.25%. At 4.34% that is a qualifying rate of 6.34%. Insured ratios are 39% gross and 44% total debt service. Our guide to how the mortgage stress test works in 2026 covers the mechanics.
The $534,560 mortgage costs $3,528.92 a month at 6.34%. Add $350 of property tax and $130 of heat and the lender sees $4,008.92 of housing cost, needing $123,351 of income to clear a 39% GDS.
| File | Loan incl. premium | Payment at 4.34% | Stressed at 6.34% | Single income needed |
|---|---|---|---|---|
| $620,000 home, $420,000 mortgage | $534,560 | $2,911.28 | $3,528.92 | $123,351 |
| $620,000 home, $540,000 mortgage | $603,200 | $3,285.11 | $3,982.05 | $137,294 |
| $850,000 home, $600,000 mortgage | $747,475 | $4,070.85 | $4,934.49 | $170,292 |
Calculated at GDS 39%, tax and heat as stated, no other debt. Note the third line: a spousal buyout mortgage hands that borrower $127,500 of extra room, then asks $170,292 of single income to use it. The ceiling moved. The test did not.
Support payments make it harder, and not gradually. On a $118,000 income this file supports $508,214 both with no support obligation and with $500 a month of it, because the GDS limit binds first. At $1,000 a month it drops to $431,212, and at $1,500 to $355,472. Support you receive can count as income, but generally only with a court order or signed agreement behind it.
Where it stops working
- Income. One income must carry the whole house at the stressed rate — the binding constraint on most files, not equity.
- The 90% wall. On a 50/50 split even the insured route fails once your mortgage passes 90% of value. On a $620,000 home with a $540,000 balance you need $580,000 against a $589,000 ceiling — $9,000 of room left.
- The $1,500,000 value ceiling. Insured financing is unavailable at or above that appraised value, so an expensive matrimonial home is back to 80% with no exception, and a 50/50 buyout there fails once the existing mortgage passes $900,000.
- Title. If only one of you is on title, a spousal buyout mortgage is generally unavailable regardless of equity or income.
If income is the wall, an alternative lender can sometimes bridge it on wider ratios at a higher rate — our breakdown of what a B-lender mortgage requires and costs sets out the trade.
What to do before you sign the separation agreement
Most costly mistakes are made in the agreement, weeks before anyone talks to a lender.
- Divide your balance by a realistic value for the house. Over 60%, plan for a spousal buyout mortgage, not a refinance.
- Have a lender pre-assess your income at 6.34% before the agreement fixes the payout. Learn what you can carry, then negotiate inside it.
- Have the agreement name every joint debt and any prepayment penalty you want financed; unnamed debts cannot be covered.
- Ask which insurer the lender will use. CMHC restricts proceeds to the equity payout; Sagen and Canada Guaranty are generally broader on agreement-named debts.
- Ask for the premium band boundaries in dollars and compare them with your expected appraisal before it is ordered.
- Budget the provincial sales tax on the premium as closing cash — $1,164.80 on this file in Ontario.
- Confirm that a spousal transfer under a written agreement is exempt from land transfer tax in your province. In Ontario, Regulation 696 provides it and your lawyer claims it.
- Hold a rate while the agreement is finalised, since these files slip. Our explainer on how a mortgage rate hold works covers the terms.
Common questions
Can I get a spousal buyout mortgage without a separation agreement?
Generally no. The signed agreement or court order is what lets the lender treat the transaction as a purchase and reach 95% of value, because it fixes the payout. A statutory declaration is rarely accepted, and typically only where the separation is well in the past.
Does the 95% ceiling mean I only need 5% equity?
In loan-to-value terms, yes. In practice the stress test binds first: on the worked file a spousal buyout mortgage allows $589,000 while a $123,351 income is needed to carry $534,560. Check the income side before relying on the equity side.
Is a spousal buyout mortgage cheaper than selling the house?
On the worked file, yes, by roughly half: $17,506.80 over five years against about $33,000 to sell a $620,000 home. That turns on your own numbers, and it ignores whether you can carry the payment alone, which matters more.
Rates and premium schedules are lowest-advertised aggregator figures and published insurer rates as at 22 October 2026, not quotes, and they change. The property values, balances, income, tax and heat figures in the worked files are stated assumptions. Payment, premium and income figures are calculated, not quoted. Insurer and lender policy varies by file and province, and nothing here is legal advice or an approval.
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