De Facto Couples and Joint Mortgages: Ownership and Liability

De facto couples face a unique set of mortgage and property ownership questions. Are you both liable on the mortgage, or just one? Do you own as joint tenants or tenants in common? What happens if you separate?

From a mortgage perspective, lenders treat de facto couples similar to married couples, but documentation requirements are stricter. Most lenders require proof of de facto status: evidence of shared residence (utility bills in both names, lease agreement showing both names), evidence of financial interdependence (joint bank accounts, shared commitments), and typically a minimum cohabitation period (often two years).

A joint mortgage means both borrowers are legally liable for the full loan amount. If the loan is $500,000, each partner is liable for the entire $500,000, not 50% each. This is a critical distinction. If one partner defaults and the other covers payments, the non-defaulting partner has full recourse to sue the defaulting partner for their share. However, the lender can pursue either partner for the full amount.

The benefit of a joint mortgage is stronger serviceability. Both partners’ incomes are considered, and both are assessed for repayment capacity. A single-income couple (one earning $120,000, one not working) will have lower borrowing capacity than a dual-income couple ($120,000 + $100,000). The joint structure unlocks the second income.

The risk of a joint mortgage is mutual exposure. If you separate and one partner refuses to refinance the property into their sole name, both remain liable. If that partner then defaults, your credit report is damaged. Separation protocols should specify who retains the property and who refinances into their sole name post-separation.

Property ownership (titling) is separate from mortgage liability. You can own the property as joint tenants (equal ownership, right of survivorship) or tenants in common (separate ownership shares, which can be unequal). Most couples default to joint tenants, but tenants in common offers flexibility if contributions or intentions are unequal.

A scenario: you and your partner buy a $600,000 apartment jointly. You contribute $150,000 (25%) as deposit; your partner contributes $150,000 (25%); both borrow $300,000 (50%). You own as joint tenants, so you each own the full property at law. But if you separate and want to split fairly, you’d own as tenants in common (you 50%, them 50%) to formalize your contributions.

Refinancing into one name after separation is the cleanest exit. If you keep the property, you refinance the mortgage into your sole name, and your ex is released from liability. This requires that you qualify on your income alone and that your lender accepts the refinance. If you can’t refinance (low income, poor credit history), your ex remains liable even though they no longer own the property.

First home buyer grants are affected by de facto status. Some grants allow de facto couples to claim as a couple (with the grant shared or allocated to one). Others require both to be first home buyers. Clarify the state-based rules before applying; assumptions often are wrong.

Superannuation splitting on separation is relevant to long-term de facto relationships. Family law recognizes superannuation as property in de facto relationships of 2+ years duration, allowing for super splits on separation. This is outside mortgage scope but important context when financing long-term partnerships.

Life insurance is often overlooked. If one partner dies, the mortgage remains the liability of the survivor. Mortgage protection insurance (a form of life insurance) can be structured so that if one partner dies, the insurance proceeds pay down the loan, protecting the survivor. For de facto couples, this is more important than for married couples because there may be less automatic legal protection.

De facto couples should formalize their property ownership and borrowing intentions upfront. A simple letter-of-intent or agreement documenting who contributed what and who intends to own what can save years of dispute if separation occurs.

Disclaimer: This article provides general information only and should not be taken as financial or legal advice. De facto recognition, property ownership, and family law implications vary by jurisdiction and circumstance. Consult a family lawyer and mortgage broker before purchasing.