Can you get a joint home loan with someone who is not your partner?

Yes. Australian lenders write joint loans for friends, siblings and parents with adult children. They will generally require every borrower to be on the title, and each borrower is jointly and severally liable for the whole debt.

Does a joint mortgage affect how much I can borrow later?

Usually yes. Most lenders count the entire joint debt against your capacity while crediting you only your share of any rental income, so a jointly owned property can reduce your borrowing power more than your ownership share suggests. Policies differ between lenders.

Can co-owners have separate loans instead of one joint mortgage?

Some Australian lenders offer property share structures with a separate loan account per owner, all secured against the whole property. The borrowers still guarantee each other, so it separates the banking rather than the ultimate liability.

Australia · 2 min read · Josh Barton · 5 May 2026 · Updated 9 Aug 2026

Joint Home Loans in Australia: Getting a Mortgage for Co-Owned Property

How Australian lenders assess joint home loan applications from friends, siblings and co-buyers, which structures they prefer, and what to sort out before you apply.

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This article is general information only and is not legal, financial, tax, or property advice. Consider advice from a qualified professional for your circumstances.

Lenders have seen this before

Australian banks are entirely comfortable with co-ownership — most couples buy jointly, after all. Where applications draw a little more scrutiny is when the buyers are friends, siblings, or investment partners rather than a couple. It's still routine; you just want to walk in prepared.

One loan or several

Most co-owners take out a single joint mortgage. The thing to understand before you do is joint and several liability: each borrower is on the hook for the *entire* loan, not just their slice of it. If one person defaults, the lender doesn't politely collect that person's share — it expects the rest of you to cover the lot.

A handful of lenders offer property share structures: a separate loan account for each owner's share, all secured against the same title. It's more complex and fewer banks offer it, and be clear about what it does — it separates the banking, so each owner runs their own balance, rate and repayments, but the borrowers still typically guarantee each other's loans. If a co-owner truly stops paying, you're still the backstop. What it buys you is clean accounting and independence in the day-to-day, not immunity from each other.

What the bank is actually looking at

When you apply jointly, the assessment turns on a few things:

Combined serviceability — can all of you, together, comfortably cover the repayments?
Each person's credit history — one borrower's bad record can sink the whole application, not just their part of it.
Deposit and equity — a combined 20% deposit keeps you clear of Lenders Mortgage Insurance.
Ownership structure — tenants in common is generally preferred for buyers who aren't a couple.

Tilting the odds your way

Get pre-approval before you start seriously looking, and deal with any credit issues well ahead of applying — not in the same week. Every borrower needs to show stable income; one thin file drags on the whole application.

A broker who's actually done co-ownership deals earns their fee here. The structure trips up generalists, and a broker who knows which lenders write property share loans can save you weeks of dead ends. Have your co-ownership agreement drafted too, because some lenders will ask for it.

After you've signed

Approval is the start, not the finish. The habit that matters most is boring: automatic repayments out of a shared property account, so nothing relies on someone remembering. Keep a clean record of who paid what — come tax time, and come any future buyout, that record is the difference between a calculation and an argument.

Once a year, look at the loan. Rates move, and a refinance can save real money. While you're there, stress-test the arrangement against a rise, so you know every owner can still cope if repayments climb.

The joint liability is the part to stay clear-eyed about: it's what makes trust between owners non-negotiable rather than nice-to-have. If you're still weighing up whether to buy together at all, start here.