Dividing Debt in Ontario Divorce: Who Pays What After Separation

Ontario doesn't split your debts down the middle. Under the Family Law Act, debts reduce each spouse's Net Family Property — the spouse whose name is on the debt carries it in their NFP calculation. But that legal reality doesn't always match what the bank expects, especially with joint debts.

How Debts Work in the NFP Calculation

Debts on the separation date are subtracted from your assets to calculate your NFP. A spouse with $300,000 in assets and $100,000 in debts has a separation-date net worth of $200,000. That number feeds into the equalization formula.

This means debt actually reduces what you owe in equalization — more debt means a lower NFP, which means a smaller equalization payment (or a larger payment received). It's counterintuitive, but it's how the math works.

If your debts exceed your assets at separation, your NFP floors at zero. You can't have a negative NFP, so your net debt doesn't become the other spouse's problem through equalization.

Individual vs. Joint Debts

Individual debts — a credit card in one spouse's name, a personal line of credit, a car loan — are assigned entirely to the spouse who contracted them. The full balance reduces that spouse's NFP.

Joint debts — a joint line of credit, a co-signed loan, a joint mortgage — are split 50/50 in the NFP calculation. Each spouse deducts half the outstanding balance from their assets.

The key distinction: the NFP calculation determines who owes whom an equalization payment. It does not change who the creditor can pursue. If you're both on a joint credit card, the bank can chase either of you for the full amount — regardless of what your separation agreement says.

The Joint Credit Card Problem

Joint credit card debt after separation creates a specific risk. If your spouse runs up the joint card after the separation date, you're still liable to the credit card company for the full balance.

The separation date freezes the NFP calculation, but it doesn't freeze the account. Until the joint account is closed or one spouse is removed, both remain liable for new charges. The practical step: close joint credit accounts immediately upon separation, or request the issuer remove one cardholder.

If your spouse accumulated debt post-separation through deliberate recklessness or to reduce their apparent NFP, you can argue for an unequal division under Section 5(6) of the Family Law Act — but the "unconscionability" threshold is high and expensive to litigate.

Mortgage Refinancing After Separation

The mortgage is usually the largest joint debt, and it creates cascading problems if not addressed:

Both spouses remain fully liable. A separation agreement stating one spouse "assumes" the mortgage is not binding on the bank. Both names stay on the loan until the mortgage is formally refinanced or discharged.

Remaining on a joint mortgage blocks your next home purchase. The full joint mortgage balance counts against your debt-to-income ratio when you apply for a new mortgage, even if your ex is making all the payments.

The CMHC Spousal Buyout Program allows refinancing up to 95% loan-to-value with a signed separation agreement — but the buying spouse must qualify on their income alone, and mortgage default insurance premiums apply.

The cleanest resolution: either sell the home and pay off the mortgage at closing, or have the spouse keeping the home refinance into their name alone. A deferred sale arrangement keeps both spouses on the mortgage for the agreed period, with all the liability risks that entails.

Getting Debt Division Right

Mapping every debt — who contracted it, whether it's joint, what the separation-date balance was — is essential for an accurate NFP calculation. Missing a debt understates your liabilities and inflates your equalization obligation.

The Ontario Divorce Financial Split Guide includes a debt inventory worksheet that categorizes each liability by type, ownership, and separation-date balance, so nothing falls through the cracks in your equalization calculation.

See more Ontario guides →