Getting your finances ready before you apply can make your first home journey smoother and more confident.
Buying your first home is exciting, but getting a first home buyer mortgage can feel complicated when you do not know what lenders look for. Your deposit matters, but it is only one part of the picture. Your income, spending, debts, savings history and overall financial position can all influence your application.
The good news is that you can take practical steps before applying. A little preparation can help you understand what you can afford, identify potential issues early and put yourself in a stronger position when you approach a lender.
In this guide, we share 11 practical tips to help strengthen your first home buyer mortgage application in New Zealand.
What Do Lenders Look for in a First Home Buyer Mortgage?
Understanding the basics can help you prepare before submitting an application.
When assessing a first home buyer mortgage, lenders generally look at your ability to repay the loan and your overall financial position.
They may consider factors such as:
- Your household income
- Your regular living expenses
- Existing debts
- Deposit amount
- Savings history
- Credit commitments
- Employment circumstances
- Proposed property
- Loan amount
- Loan-to-value ratio (LVR)
- Debt-to-income position
The Reserve Bank of New Zealand explains that banks use their own lending criteria when assessing how much an individual can borrow, even when the borrower meets applicable LVR requirements.
The key takeaway: do not focus only on saving a deposit. Work on your overall financial position.
1. Know Exactly How Much Deposit You Have
Your deposit is one of the first numbers to understand before looking for a home.
Start by calculating how much you genuinely have available for your purchase.
Your deposit could include:
- Personal savings
- Eligible KiwiSaver funds
- Family assistance where appropriate
- Other acceptable sources of funds
A larger deposit can reduce the amount you need to borrow and may improve your overall lending position.
However, having less than a 20% deposit does not automatically mean you cannot buy a home. The Reserve Bank notes that banks can provide some high-LVR lending, although additional requirements or costs may apply.
For eligible buyers, Kāinga Ora’s First Home Loan may provide a pathway to buying with a 5% deposit through participating lenders, subject to eligibility and lending criteria.
Check First Home Loan information on Kāinga Ora
Before applying for a first home buyer mortgage, know your deposit and understand where it comes from.
2. Review Your Spending Before Applying
Your recent spending habits can give you a clearer picture of how comfortably you could manage a mortgage.
Go through your bank statements and look at your regular expenses.
Check your spending on:
- Eating out
- Entertainment
- Subscriptions
- Shopping
- Travel
- Buy-now-pay-later purchases
- Vehicle costs
- Other discretionary expenses
You do not need to eliminate everything you enjoy. Instead, look for areas where you could create more room in your budget.
If your future mortgage repayment would significantly increase your monthly costs, practising that repayment before buying can be useful.
For example, if you expect your mortgage to cost $2,800 per month and you currently save $1,500, you could start setting aside an additional amount each month to see how the higher commitment feels.
A realistic budget can help you approach a first home buyer mortgage with greater confidence.
3. Reduce Unnecessary Debt
Existing debt can affect the amount you may be able to borrow.
Before applying for a first home buyer mortgage, review all your current financial commitments.
These may include:
- Credit cards
- Personal loans
- Car finance
- Student loan obligations
- Buy-now-pay-later accounts
- Other repayment commitments
You do not necessarily need to clear every debt before applying. However, reducing unnecessary debt can improve your monthly cash flow.
For example, paying off a small personal loan may remove a regular repayment and leave more income available for housing costs.
The goal is to make your financial position easier to understand and manage.
4. Be Careful With Buy Now, Pay Later Services
Small repayments can become significant when you have several commitments running at once.
Buy-now-pay-later services can be convenient, but multiple accounts and repayments can add to your financial commitments.
Before applying for a first home buyer mortgage, review your BNPL accounts and outstanding balances.
Ask yourself:
- How many accounts do I have?
- What are my outstanding balances?
- How much do I repay each month?
- Do I regularly use these services?
- Could I reduce my reliance on them?
Avoid opening unnecessary new credit accounts while preparing for a mortgage application.
A simpler financial profile can make it easier to demonstrate that you can manage your future home loan repayments.
5. Build a Consistent Savings History
Regular saving can demonstrate financial discipline while helping you build your deposit.
Instead of only thinking about the final amount in your savings account, pay attention to your saving pattern.
For example, regularly transferring money into a dedicated savings account after payday can help you develop a consistent habit.
If you receive overtime, bonuses or other additional income, consider whether putting some of it towards your deposit could help you reach your goal sooner.
Your savings strategy should also leave enough money for other costs associated with buying a home.
A strong savings habit can help prepare you for both the first home buyer mortgage and the financial responsibilities that come after settlement.
6. Keep Your Credit Commitments Under Control
Your credit history is another part of your overall financial picture.
Before applying for a first home buyer mortgage, make sure you understand your existing credit commitments.
Good habits include:
- Making repayments on time
- Avoiding unnecessary credit applications
- Keeping credit card balances under control
- Reviewing your financial accounts
- Avoiding unnecessary new debt
If you believe there is an error in your credit information, investigate it before applying for your mortgage.
Do not wait until you are ready to make an offer to discover a potential credit issue.
7. Understand Your Borrowing Position Before House Hunting
Knowing your approximate budget can stop you from searching outside your realistic price range.
Before attending dozens of open homes, work out what you may be able to borrow and what repayment level you could comfortably manage.
Your borrowing position depends on your circumstances, including income, expenses, debts and deposit.
A mortgage pre-approval can give you a clearer indication of what a lender may be prepared to offer, subject to its conditions.
GM Finance already provides guidance on mortgage pre-approval and why it matters before applying for a home loan.
Getting your numbers sorted early can make your first home search much more focused.
8. Organise Your Documents Early
Having your paperwork ready can make the mortgage application process more organised.
Depending on your circumstances and lender, you may need documents such as:
- Proof of identity
- Proof of income
- Employment information
- Bank statements
- Savings history
- Details of existing debts
- KiwiSaver information
- Information about the property
If you are self-employed, you may also need additional financial records.
Do not leave document collection until the last minute.
Preparing your paperwork early can help reduce delays when you are ready to apply for a first home buyer mortgage.
9. Avoid Major Financial Changes Before Applying
A major financial decision shortly before applying could change your borrowing position.
If you are preparing for a first home buyer mortgage, think carefully before taking on significant new commitments.
For example, consider the potential impact of:
- Buying a new vehicle on finance
- Taking out a large personal loan
- Increasing credit card limits
- Making significant new purchases
- Changing your financial commitments
This does not mean you cannot make changes to your life. It simply means you should understand how a major financial decision could affect your mortgage application.
If you are unsure, discuss the proposed change with your mortgage adviser before proceeding.
10. Understand LVR and Low-Deposit Lending
Your deposit and property value work together to determine your loan-to-value ratio.
LVR measures the amount you borrow compared with the value of the property.
For example:
Property value: $600,000
Deposit: $60,000
Mortgage: $540,000
LVR: 90%
The Reserve Bank currently allows banks to have up to 25% of new owner-occupier lending above 80% LVR, while the specific lending decision remains with the bank and is subject to its own criteria.
Recent Reserve Bank data also shows that first-home buyers continue to account for a substantial portion of higher-LVR residential lending.
This is important because a smaller deposit does not necessarily end your home-buying plans.
However, low-deposit lending can come with additional conditions or costs, so understand the complete loan structure before making a decision.
Learn more about LVR restrictions from the Reserve Bank of New Zealand
11. Look Beyond the Interest Rate
The cheapest-looking interest rate is not automatically the right first home buyer mortgage for you.
When comparing home loans, look at the wider package.
Consider:
- Fixed interest rates
- Floating rates
- Loan term
- Repayment flexibility
- Fees
- Cash contributions
- Offset accounts
- Revolving credit
- Additional repayment options
- Break costs
- Future financial goals
For example, a slightly different rate may be worthwhile if the loan provides features that better suit your financial plans.
Your first home buyer mortgage should be assessed as a complete loan rather than judged by the advertised interest rate alone.
The right structure can be just as important as the headline rate.
Can First Home Buyers Get a Mortgage With Less Than a 20% Deposit?
Yes, some first-home buyers may be able to access low-deposit lending, depending on their circumstances.
A common misconception is that every first home buyer needs a 20% deposit.
The Reserve Bank explains that banks can undertake some high-LVR lending, and that most high-LVR lending tends to go to first-home buyers.
There are also specific schemes such as the Kāinga Ora First Home Loan for eligible buyers.
However, having a smaller deposit does not guarantee approval.
Your lender will still consider your income, expenses, debts, credit position, ability to service the loan and its own lending criteria.
This is why getting professional advice before making an offer can be valuable.
What About Debt-to-Income Rules?
Your income and total debt can also affect your borrowing position.
Debt-to-income, or DTI, rules work alongside LVR restrictions.
The Reserve Bank explains that for owner-occupiers, high DTI lending applies where total debt, including the proposed mortgage, exceeds six times annual gross income. Banks must consider both LVR and DTI requirements when applicable.
For a first-home buyer, this means the size of your deposit is only one part of the overall calculation.
Understanding your income, existing debt and proposed mortgage together can give you a more realistic picture of your borrowing capacity.
First Home Buyer Mortgage Checklist
Use this quick checklist before you start your application.
☐ I know how much deposit I have.
☐ I understand my monthly spending.
☐ I have reviewed my existing debts.
☐ I understand my credit commitments.
☐ I have a consistent savings history.
☐ I know roughly what property price I can afford.
☐ I have organised my financial documents.
☐ I understand LVR and low-deposit lending.
☐ I have considered government-supported first-home options where relevant.
☐ I understand that interest rate is not the only factor when choosing a loan.
☐ I have spoken with a mortgage adviser.
The more prepared you are, the easier it can be to approach your first home buyer mortgage with confidence.
Why Use GM Finance for Your First Home Buyer Mortgage?
The first-home journey can be easier when you have someone helping you understand your options.
GM Finance helps New Zealand buyers explore home loan options and navigate the mortgage process.
Instead of approaching the first lender you see, a mortgage adviser can help you understand your borrowing position and identify loan options that may suit your circumstances.
GM Finance’s Home Loan service provides information for buyers looking for finance for their home purchase.
You can also read GM Finance’s existing First Home Buyer Mistakes to Avoid When Applying for a Mortgage guide for additional information about common application pitfalls.
Getting advice early can help you make better-informed decisions before you find the home you want to buy.
Final Thoughts
Preparing before applying can put you in a stronger position to pursue your first home.
A first home buyer mortgage is about much more than having a deposit.
Your income, expenses, savings behaviour, debts, credit commitments and overall financial position can all matter when lenders assess your application.
Start early. Review your spending. Reduce unnecessary commitments. Build consistent savings. Organise your documents and understand how much you can realistically afford.
Most importantly, do not assume that you need to have everything perfect before asking for advice.
The earlier you understand your options, the more confidently you can plan your first home purchase.
Ready to Explore Your First Home Buyer Mortgage?
Your first home starts with knowing what you can afford.
Whether you are still saving your deposit, preparing for pre-approval or ready to start looking at properties, GM Finance can help you understand your home loan options.
Speak with GM Finance today and take the next step towards finding a first home buyer mortgage that fits your circumstances.