With a joint car loan, both borrowers take responsibility for repaying the debt, and one person may have to repay the full amount if the other does not pay. Agreeing to split the monthly repayment does not mean each person is responsible for only half the loan.
What are you agreeing to repay?
ASIC’s Moneysmart guidance on shared loans explains that both people are responsible for the debt and, if one does not pay, the other must pay the full amount.
Before signing, ask the lender to explain each applicant’s obligations using the actual contract. Do not treat adding your name as simply helping someone complete an application. Understand what you are borrowing for and how you will benefit from the vehicle.
Make a repayment plan you both understand
Write down the full repayment, its frequency, the first due date and the account it will come from. Then record how each person plans to contribute and who will check that payments have cleared.
Consider a practical question: what happens if one income stops for a month? Discuss how you would cover repayments alongside rent, food and other commitments, rather than assuming the usual split will always work.
Moneysmart’s car-loan checklist recommends checking fees, the loan term and affordability if circumstances change. Include registration, insurance and running costs in the discussion, plus any final balloon payment in the finance offer.
Clarify each person’s role before signing
Ask whether the paperwork makes you a borrower or a guarantor. These roles should not be used interchangeably when discussing the arrangement.
Legal Aid NSW explains that co-borrowers are jointly and individually responsible for the loan, and recommends legal advice for co-borrowers and guarantors about their situation.
If you have been asked to provide a guarantee instead, our car-loan guarantor guide covers questions to raise. Ask separately how vehicle ownership will be documented; do not leave this to an informal assumption.
Keep the documents and ask early
Each borrower should keep the quote, signed loan documents and repayment instructions. Ask how both of you can receive statements and contact the lender if payment arrangements become difficult.
Take time to have unclear obligations explained before committing. Aussie Loans is a finance broker; contact our team to discuss your proposed car finance and the questions to put to the lender.
General information only, checked 29 October 2026. Lender approval, terms and eligibility apply; seek legal advice about your particular obligations.
