The more help you get, the more complicated the mortgage feels. Here’s what’s actually true.

A $50,000 loan from your parents can help you buy, or, handled the wrong way, quietly reduce what the bank will lend you. The difference isn’t luck. A family loan can affect how much a lender will give you, but whether it does, and by how much, comes down to how it’s structured and whether you disclose it. Done well, it’s a lever. Done vaguely, it’s a liability.

You’re in good company asking. Money.com.au’s 2026 survey found 46% of Australians had help from the Bank of Mum and Dad to buy their first home, and for Gen Z buyers it was 78%. Family money and mortgages mix all the time. What decides how well they mix for you is how your $50,000 is set up, and which lender reads it.

Lenders assess serviceability: can you comfortably meet repayments on top of your existing commitments? A family loan is a commitment, even if your parents never intend to chase it, and you’ll be asked to disclose it like any other debt. Some lenders will:

• treat it as a liability and factor a notional repayment into your serviceability, reducing what they will lend; or
• accept it on terms closer to a gift, for example where the loan agreement says no repayments are required (such as only on sale) and the paperwork meets the lender’s requirements. Not every lender will do this.

Some lenders won’t accept a borrowed deposit at all, or only when you’re borrowing a smaller share of the property’s value. Different lenders land differently on the same arrangement. Two of them can look at the identical $50,000 and reach different answers on how much you can borrow, which is why the lender you approach is part of the strategy.

That gap matters because borrowing is already stretched for a lot of first-home buyers. Mozo’s 2025 report estimates a single buyer needs a pre-tax income of about $149,000 a year to borrow for an average-priced home. When your numbers are that close to the line, a repayment the lender pencils in for your parents’ loan can be the difference between the loan you planned on and a smaller one.

• An interest-free loan with no set repayments is easiest on your monthly cashflow, but a cautious lender may still assume a repayment exists.
• A loan with agreed periodic repayments is clearer, but those repayments count against your serviceability like any other debt.

There is no single right answer. It depends on your income, the lender, how tight your borrowing already is, and how the loan agreement is written.

The money is identical in each case below. The paperwork changes, and lenders read the paperwork.

• Documented as a gift. Your parents sign a gift letter (usually a dated, signed letter, sometimes a statutory declaration or the lender’s own form) confirming the money doesn’t have to be repaid. A genuine gift isn’t a debt, so it doesn’t count against your serviceability. Some lenders still want gifted money to sit in your account for a while before they treat it as your savings.
• Documented as a loan with no required repayments. Some lenders will treat this much like a gift. Others will still assume a repayment.
• Documented as a loan with regular repayments. Clear and easy to assess, and counted like any other debt.
• An informal “pay us back when you can”. The hardest for a lender to read. You still have to disclose it, and with nothing in writing, a cautious lender has little reason to read it generously.

A gift letter only works if it’s true. If your parents expect the money back, it’s a loan, and it should be written up as one. Mozo’s 2025 survey found three in four parents who help their kids buy property don’t expect to be repaid, so for plenty of families the honest answer turns out to be the simpler one.

You are expected to disclose debts honestly on a loan application. Leaving off a loan your parents would never chase can feel harmless, but it rarely stays hidden. Lenders check where your deposit came from, so a family loan tends to surface in your statements before settlement, and a debt that turns up mid-application can stall or sink the approval. If it surfaces later, when you refinance, sell, or your parents need the money back, an undisclosed loan can put you in breach of your loan terms.

The family side can unravel too. An arrangement nobody wrote down tends to get tested years later, when you sell, separate, or a sibling asks for the same help, and by then everyone may remember it differently. That conversation is much easier to have before the money moves.

Disclosure isn’t the enemy of borrowing power. The structure is what you optimise. Which means the sequence matters: agree the shape of the arrangement with your parents, put it in writing, and only then choose which lender sees it.

Get that order backwards and the usual cost is a delay you didn’t need while paperwork gets drafted mid-application, or an approval for less than you needed from a lender whose policy never suited your arrangement. Both are avoidable.

A written loan deed tells the lender exactly what this money is, protects your parents if things change, and removes the ambiguity that makes cautious lenders more conservative. Vagueness rarely works in your favour.

Most families skip this step. Money.com.au found almost two in three first-home buyers who got family help (64%) had no formal written agreement with their parents. That’s understandable, because nobody enjoys handing Mum and Dad a contract. But a short, clear document usually makes the family conversation easier, since everyone can see what was agreed.

Everything above is general. How your $50,000 actually lands depends on things an article can’t see: your income and existing debts, what your parents really intend, how tight your borrowing already is, and which lenders’ policies suit that mix.

That’s the conversation Fledge is for. It’s free and confidential, and we come back to you within 24 hours. We look at the whole picture with you and help you see how your family money is likely to be read before anyone applies. For a family loan, that usually means working through:

• whether the money is really a gift or a loan, and what each looks like on paper
• how a gift letter or a loan agreement is likely to affect your borrowing
• what to put in writing with your parents, and when
• the point at which it makes sense to bring in a broker

You leave knowing what matters in your situation, what to decide, and in what order, before any money moves. When you’re ready, we introduce you to a mortgage broker who knows which lenders are comfortable with family loans and, if your parents want the loan properly drafted, a lawyer who can do it.

It’s free because the specialists we introduce may pay us a referral fee if you choose to work with them. That never costs you anything, and it never changes who we recommend. You don’t need paperwork or numbers to start, just a rough idea of where you’re up to.

Tell us about your family loan→