Joint Home Loans in Australia: Buying Property with a Partner, Friend, or Family Member

Joint Tenancy vs Tenants in Common: What Is the Difference?

When two or more people purchase property together in Australia, they hold title in one of two ways:

Joint Tenancy: Both owners hold equal shares. If one owner dies, their share automatically passes to the surviving owner(s) — this is called the 'right of survivorship'. The deceased owner's share does not form part of their estate and cannot be willed to someone else. Joint tenancy is the most common ownership structure for married or de facto couples.

Tenants in Common: Each owner holds a specified share (e.g., 50/50, 60/40, 70/30 — any ratio). If one owner dies, their share passes according to their will — not automatically to the co-owner. Each owner can sell, transfer, or mortgage their share independently (subject to any co-ownership agreement). Tenants in common is typically used for friends, siblings, parent-child purchases, and investment partners.

The ownership structure must be specified when the property is purchased — it is recorded on the certificate of title. It can be changed later, but this may trigger stamp duty and capital gains tax consequences.

For the mortgage, the ownership structure does not matter — all borrowers are jointly and severally liable for the entire loan, regardless of whether they hold 50% or 10% of the property. 'Joint and several liability' means each borrower is individually responsible for the full debt. If your co-borrower stops paying, the lender can pursue you for the entire balance — not just your share.

This distinction between property ownership (which can be unequal) and loan liability (which is always 100% for each borrower) is the most important concept in joint ownership.

How Does Joint Income Affect Borrowing Power?

The primary financial advantage of buying jointly is increased borrowing capacity. When two (or more) incomes are combined, the total borrowing power increases significantly — often more than proportionally, because fixed living expenses do not double for two people sharing a household.

Example: A single borrower earning $95,000 with $5,000 in monthly expenses may borrow approximately $500,000. Two co-borrowers each earning $95,000 ($190,000 combined) with $7,500 in shared monthly expenses may borrow approximately $950,000–$1,050,000. The combined borrowing power is nearly double — because shared living expenses (one rent, one set of utilities, one internet bill) are lower than two separate households.

However, each co-borrower's debts and liabilities are fully assessed. If your co-borrower has $30,000 in credit card limits, a $15,000 car loan, and $50,000 in HECS-HELP debt, all of these reduce the joint borrowing capacity — even if the credit cards carry no balance (lenders assess the limit, not the balance).

The deposit is also shared — each buyer contributes to the deposit, stamp duty, and purchase costs. This can be split equally or in proportion to ownership shares (particularly relevant for tenants in common).

Co-borrower requirements: All co-borrowers undergo the same credit assessment — credit score check, income verification, expense analysis, and debt review. If one co-borrower has a poor credit history, it can affect the overall application. Some lenders will decline the application entirely; others will assess based on the stronger borrower's profile but may offer less favourable terms.

• ✓Combined incomes significantly increase borrowing capacity
• ✓Shared living expenses improve serviceability assessment
• ✓Each co-borrower's debts reduce total borrowing power
• ✓Credit card limits (not balances) are assessed for all borrowers
• ✓One borrower's poor credit can impact the entire application
• ✓Deposit and costs can be split according to ownership shares
• ✓HECS-HELP debts of all borrowers are factored into serviceability

Exit Strategies: What Happens If You Want Out?

This is the most important planning element for any joint purchase — particularly between non-couples. You must agree on exit scenarios before purchasing, and ideally formalise them in a co-ownership agreement (sometimes called a co-habitation agreement or property agreement) prepared by a solicitor.

Scenario 1 — One party wants to sell, the other wants to keep: The remaining owner must buy out the departing owner's share. This requires: agreeing on the property's current value (typically via an independent valuation), the remaining owner refinancing the mortgage into their sole name, and paying the departing owner their equity share.

Scenario 2 — Both parties agree to sell: The property is sold on the open market, the mortgage is repaid, and the remaining equity is distributed according to ownership shares.

Scenario 3 — Dispute: If co-owners cannot agree on selling or buying out, either party can apply to the state Supreme Court for an order to sell the property. This is expensive ($10,000–$30,000+ in legal fees) and time-consuming — but it is the legal backstop.

Scenario 4 — Death of a co-owner: Under joint tenancy, the surviving owner automatically inherits. Under tenants in common, the deceased's share passes to their estate (beneficiaries under their will). This can result in the surviving co-owner being in partnership with the deceased's heirs — potentially strangers.

A co-ownership agreement should cover: how the property will be valued if one party wants to exit, the right of first refusal (the remaining owner gets first option to buy), how costs are shared (mortgage, rates, maintenance, insurance), what happens if one party cannot meet their share of repayments, dispute resolution mechanisms (mediation before court), and exit notice periods.

Cost of a co-ownership agreement: $1,000–$3,000 (solicitor-prepared). This is one of the best investments you can make when purchasing property with a non-spouse.