Short answer: Standard: 20%. First Home Loan: 5%. More deposit = less interest.
For a standard mortgage, banks want 20% of the purchase price. But first home buyers can get in with 5% through the First Home Loan. The more deposit you have, the less you borrow and the lower your repayments. Even 1% more deposit can save thousands in interest.
House Price: $600,000
Twenty Percent: $120,000
Five Percent: $30,000
Difference: $90,000 less to save with First Home Loan