Jason and Sarah want to buy their first home for $380,000 but do not have the required 5% deposit. With a family guarantee loan, Sarah's parents can pledge $80,000 secured against their own home to help Jason and Sarah obtain a loan for the full purchase price plus costs of $384,000. This allows Jason and Sarah to avoid paying mortgage insurance and to borrow more than the bank would normally allow based on the property value alone. If Jason and Sarah default on the loan, Sarah's parents would only be responsible for the $80,000 portion secured by their guarantee.