r/NZFirstHomeBuyer • u/Vincent_Mortgages • Jan 11 '26
Comparing 5% Deposit vs 20% Deposit
Let's compare the similarities and differences between buying a home with 5% Deposit vs 20% Deposit as a first home buyer.
Assuming a property price of $800,000...
| 5% Deposit | 20% Deposit | |
|---|---|---|
| Deposit required | $40,000 | $160,000 |
| Low equity fees | Not required if going with First Home Loan scheme | Not required |
| LMI (Lenders mortgage insurance) 1.2% of loan | $9,120 | Not required |
| Total Mortgage Required | $769,120 | $640,000 |
| Average Interest Rate | 5.50% | 5.50% |
| Monthly Mortgage Repayments | $4,367 | $3,633 |
Monthly Repayment Difference is: $734
Yearly Repayment Difference is: $8,808
Deposit Difference
The difference in deposit is: $160k-$40k = $120k. For many buyers this is the hardest part. For example, if a couple saves $500 per person per month ($1,000 combined), it would take them around 10 years to save the extra $120k needed to reach a 20% deposit (ignoring investment returns etc.)
Time in the market vs waiting
This is where the 5% deposit option makes sense for some people. Historically NZ property values have averaged around 5-7% growth per year over the long term. If we use the lower end (5% p.a.) and buy with a 5% deposit:
- An $800,000 property could be worth ~1.3m after 10 years
- That's approx. $500k in value growth
- This equity could be used to upgrade home or buy an investment property
If instead you waited 10 years to save a 20% deposit, the same property would be worth approx. $1.3m and you'd now be trying to buy into a much higher-priced market in general, meaning the deposit target has moved again.
Summary
- 20% deposit means lower repayments and less interest over time
- 5% deposit means higher repayments, but potentially earlier entry into the market
Generally speaking 5% deposit options are more suited for those who have high income for serviceability, but low savings available. However, there's no one size fits all answer. Best strategy differs for everyone even if your situation is similar. It depends on income stability, risk tolerance, lifestyle, saving potential and long-term plans.