If you read the news in New Zealand, it is easy to feel like buying your first home is out of reach unless you have a massive income or a huge inheritance.
Here is the encouraging truth we see every single day as mortgage advisers: ordinary Kiwis are buying their first homes every week—and it is much more doable than the headlines make out.
The secret is understanding that banks don't look at one giant, scary number. Instead, buying your first home comes down to a handful of simple building blocks: what you earn, what you've saved in your KiwiSaver, and how a bank checks your monthly budget.
Let's break down the real-world numbers in plain English—and show you the smartest ways to get the keys to your first place.
1. The Big Picture: Deposit vs. Borrowing Power
If you are completely new to mortgages, there are only two main things a bank looks at when you apply to buy your first home:
- Your Deposit (The Upfront Chunk): This is the money you put towards the house price yourself. It usually comes from your KiwiSaver first-home withdrawal, your cash savings, and sometimes gifted money from family. The rest of the house price is covered by your mortgage.
- Your Borrowing Power (The Weekly Budget Test): This is the maximum mortgage the bank calculates you can comfortably pay back out of your regular income.
When you look at the live Reserve Bank of New Zealand (RBNZ) data, you'll notice that the typical first-home buyer household income isn't a millionaire's salary—it generally represents two everyday Kiwi wages combined (or one strong solo income with a flatmate).
2. How Much Deposit Do You Actually Need?
One of the biggest myths in New Zealand real estate is that you must save a 20% deposit before a bank will talk to you.
In bank speak, your deposit size is measured using something called an LVR (Loan-to-Value Ratio)—which is simply the percentage of the house price you are borrowing. If you have a 10% deposit, your LVR is 90%.
In New Zealand, you actually have three different deposit doors you can walk through:
- The 5% Deposit Door (Kāinga Ora First Home Loan): Backed by Kāinga Ora, this scheme lets eligible first-home buyers get on the ladder with just a 5% deposit. There is a small Kāinga Ora insurance fee (which can often be added to the loan), and you still get access to low special interest rates.
- The 10% Deposit Door (Low-Deposit Bank Lending & New Builds): Banks are allowed to do a portion of their lending to buyers with a 10% deposit. Even better, if you are buying a brand-new build or turnkey home (or building from scratch with a construction loan), new builds are exempt from the Reserve Bank's normal deposit rules, making a 10% deposit much easier to get approved.
- The 20% Deposit Door (Standard Special Rates): If you have a 20% deposit or more, you unlock the banks' lowest advertised mortgage interest rates, avoid low-deposit fees, and qualify for full bank cashbacks.
How KiwiSaver Supercharges Your Deposit
For most first-home buyers, your KiwiSaver account is your secret weapon. Once you have been contributing for at least three years, you can withdraw almost your entire balance (leaving just $1,000 behind) to put towards your first home.
If you are buying with a partner and you both withdraw your KiwiSaver balances, you may find you are already most of the way to a 5% or 10% deposit before you even count your regular bank savings. (Read our guide on emptying your KiwiSaver to zero and how to rebuild it).
Don't Forget Your $3,000–$5,000 Upfront Cash Buffer.
While your KiwiSaver first-home withdrawal and savings will cover your main house deposit, it is smart to keep $3,000 to $5,000 set aside in a separate bank account for the upfront due-diligence costs of buying a home:
- Your Property Lawyer / Conveyancing Solicitor ($1,800–$2,500): You'll need a solicitor to check the property title—whether it's freehold, cross-lease, or leasehold or a unit title apartment—and handle settlement day. The good news? Most banks pay a home loan cashback after settlement that usually more than covers your legal bill.
- Building Inspection Report ($500–$800): Having a qualified building inspector check the home is essential for your peace of mind (and is often required by the bank if you have less than a 20% deposit).
- Registered Property Valuation ($800–$1,100): If you are buying with a low deposit (under 20% deposit) or buying a new build, the bank will usually ask for an independent registered valuation.
- Council LIM Report ($300–$500): A Land Information Memorandum (LIM) from the local council shows building consents, drainage, and natural hazard zones. (Often the seller's real estate agent will supply one, especially if you are preparing to buy at auction).
3. How Banks Work Out What You Can Borrow
When you apply for a mortgage pre-approval, the bank doesn't just check if you can afford the repayments at today's advertised interest rates.
Instead, to make sure you won't be stretched too thin if interest rates go up in the future, the bank tests your budget at a higher "stress-test" interest rate (usually around 7%). They also check that your total debt stays within the Reserve Bank's Debt-to-Income (DTI) rules.
As the live RBNZ Pulse stat above shows, very few first-home buyers are actually held back by DTI rules. Instead, what matters most is your monthly cash flow—how much money you have left over each month after tax and basic living expenses.
4. Three Real-Life Pathways: How Different Buyers Make It Work
Every household is different, and a good mortgage adviser knows how to present your specific situation to the bank that will treat you most generously. Here is how three common types of first-home buyers make the numbers work:
Pathway 1: Buying on Your Own (The Solo Buyer)
Buying your first home on a single income is a huge milestone, and plenty of solo buyers do it every month by using two clever levers:
- Using Flatmate or Boarder Income: If you buy a 2- or 3-bedroom home and rent out a spare room to a flatmate, most banks will let you count flatmate or boarder income towards your application. Having just one flatmate paying board can significantly boost what a bank is willing to lend you.
- Teaming Up with a Friend or Sibling: You don't need a romantic partner to get two incomes on an application. More and more Kiwis are buying a house with friends or family using a simple co-ownership agreement to pool their KiwiSaver deposits and borrowing power.
Pathway 2: Buying as a Couple (No Kids Yet)
If you are buying as a couple with two incomes, your combined paypackets go a long way in a bank's calculator:
- Why Two Incomes Go Further: Because two people sharing a home don't spend twice as much on power, internet, or rates as one person, banks love dual-income applications. Plus, in New Zealand, two modest salaries actually pay less income tax overall than one big salary of the same total amount.
- Quick Wins to Boost Your Limit: Even for couples with strong incomes, old credit cards or Afterpay accounts can quietly hold your numbers back. Closing an unused card before you apply is one of the fastest ways to boost your pre-approval—read why in our guide on how a $10,000 credit card limit silently reduces your borrowing power (even with a $0 balance) and how Afterpay and Buy Now, Pay Later schemes affect mortgages.
Pathway 3: Buying as a Family (With Kids)
Buying your first home when you already have children (or one on the way) is all about picking the right bank:
- Why Bank Selection Matters for Families: Every bank estimates family living costs slightly differently, and they also factor in ongoing paid daycare or childcare bills. If you are currently on—or planning—parental leave, some banks are much more flexible about counting your return-to-work salary than others. Check out our dedicated guide on maternity and parental leave: how it affects your mortgage and how to get approved.
- Counting All Your Income: If either partner works regular extra hours or earns bonuses, choosing a bank that accepts your full overtime, bonuses, and commission can make a huge difference to your family's budget.
Bonus Pathway: Buying When You Are Self-Employed or Contracting
A huge number of first-home buyers—from tradies and small business owners to IT and medical contractors—put off talking to a bank because they've heard you must have two full years of tax returns first.
In reality, several New Zealand lenders have dedicated pathways for self-employed buyers:
- Small Business Owners & Sole Traders: Depending on your industry background and cash flow, it is often possible to get approved without waiting two full financial years—read our breakdown on the two-year myth: getting a NZ bank mortgage with 1 year of business financials (or sometimes less).
- Hourly & Day-Rate Contractors: If you have recently moved from a salaried job into contracting in the same field, specific banks can assess your income from day one. See how it works in our guide to getting a mortgage as a new IT or medical contractor.
5. Test Your Own Scenario: HLF Borrowing Power Calculator
Curious to see what your own household numbers might look like?
Instead of guessing with generic averages, try our Home Loan Factory Borrowing Power Calculator below (or open it directly on our Borrowing Power Calculator page). You can test buying solo vs. as a couple, add flatmate income, include kids or childcare, and see an indicative estimate in under two minutes.
(Once you have a ballpark loan figure, you can also check what your actual weekly or fortnightly payments would look like at today's interest rates using our Home Loan Repayment Calculator).
Why an early 90-Day Tidy-Up Can Add Tens of Thousands to Your Pre-Approval
When you apply for a mortgage in New Zealand, banks ask to see your last 90 days of bank statements (learn more about why banks ask for loan and bank statements).
They aren't judging you for buying flat whites—they are checking that your regular bills are paid on time and that you aren't relying on unarranged overdrafts or short-term debt to get through the month.
If you plan to buy within the next 3 to 12 months, doing a quick 90-day tidy-up now can dramatically improve how a bank views your application:
- Cancel Unused Credit Cards & Buy Now, Pay Later Accounts: Even if you owe $0, closing an old $10,000 credit card limit or shutting down Afterpay, Zip, and Laybuy accounts immediately frees up monthly servicing room in the bank's calculator.
- Avoid Taking Out Car Finance Before You Buy: A $300/week car loan can wipe $150,000+ off your home loan borrowing power, and you cannot use a personal loan to top up your house deposit.
- Check Your Credit File Early: If you have had an old phone or utility bill go to collections in the past, chatting with an adviser early gives you time to sort it out—read our guide on how to repair a bruised credit score in NZ or check your credit report for free via Centrix.
