Mortgages
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Property Investment
10 min read
Author: Ben King
Ben has 14 years of experience as a mortgage advisor and background as an investment adviser.
Reviewed by: Derry Brown
Financial Adviser in industry since 2007. Investor in Auckland & Christchurch. Previous COO of Global Brand
The most common question investors ask is: “Can I afford an investment property?”
But whether you’re a first-time or a seasoned investor – it’s often hard to get a straightforward answer.
Why? There are 3 factors you need to look at when working out if you can afford an investment property (or not):
In this article, you’ll learn how much money you need for these 3 factors. You’ll also be able to use 3 calculators. These will help you figure out if you can afford an investment property or not.
By the end of the article, you’ll know if you can afford an investment property.
You’ll also learn what you can do if you aren’t quite ready to invest – yet.
Do you have a question or comment about the cost of buying an investment property? Feel free to leave your thoughts in the comment section at the end of the page.
Let’s start with how much an investment property costs.
The minimum you’ll usually pay is:
This means you’ll need a deposit of:
But remember, if you’re borrowing money to buy an existing property, 9 times out of 10, you need to renovate it.
If you don’t the cashflow will likely be terrible. This is because you pay extra tax through the interest deductibility rules.
| Property | Typical deposit | Example purchase price | Deposit |
| New Build | Around 20% | $550,000 | Around $110,000 |
| Existing investment property | Around 30% | $500,000 | Around $150,000 |
You’ll usually need another $50k for renovations.
Once you include renovation spend, the minimum deposit you need is:
The good news is: You don’t need to have a deposit saved in cash.
Many Kiwi investors buy properties without putting any cash down at all.
Instead, they use existing equity in their home for the deposit. Here’s how this works.
Many Kiwis have “usable equity” within their homes.
Usable equity is the amount you can borrow towards a new investment. The formula to work out how much you have is:
(Home Value x 0.8) – Personal Mortgage = Usable Equity.
For instance, let’s say your home is worth $1 million, but you have a $500,000 personal mortgage left.
The maximum amount you can borrow against that property is $800,000.
But since you already have a $500k mortgage, you have a maximum of $300k left in usable equity.
That means you can borrow $300k against your home and use it as the deposit for an investment property.
Now, with that $300k you can buy investments worth:
To save on the number crunching, you can use our useable equity calculator.
This helps you to figure out how much you can potentially borrow against your own home for deposits:
On top of the deposit, you’ll probably need a mortgage, so the bank must be willing to give you the money for the house.
They won’t automatically give you the money just because you have the deposit.
You also need enough income. They want to make sure that even if a few bad things happen, you’re still be able to afford the mortgage.
The income side of a mortgage application is often harder to calculate.
But, we generally say it’s worth digging deeper if your household income is $100,000 or more.
You might use a mortgage calculator. You see the payments the calculator says and think: “Yup, I can afford that”, but the bank might not agree with you.
This is because the banks run lots of calculations to decide if you can afford to pay the mortgage.
These calculations are usually referred to as “servicing”. Can you afford to service the mortgage?
To see the amount you can borrow, use this (loose) ballpark calculation:
(Your income) x 6 = the amount you can borrow
Note: this multiple can change. When interest rates are lower, most mortgage advisers will use 7x.
For instance, if you and your partner earn:
You have $150k in household income. Multiply that by 6 and you get $900k. So, the bank may lend you up to $900k.
When a bank looks at your mortgage application it’s a bit more complicated than that. They “stress test” your application. This includes doing things like:
These are all complicated and technical, so use our calculator to see how much you could potentially borrow based on your income.
As well as the deposit and income required to buy an investment property, you also need to be able to hold onto it.
Right now, while interest rates are high, the rent won’t usually cover all the rental property’s costs.
This is sometimes called negative gearing. It’s very common when you borrow all the money to invest in property. i.e. you don’t have a cash deposit.
About 90% of investment properties today are negatively geared. That’s according to Valocity, a data firm.
So, the investor needs to “top-up” the investment property’s mortgage.
This is typically somewhere between $350 – $500 a week.
This is the case whether you invest in a New Build or existing investment property.
For example, here are 3 different properties with the cashflow of each:
This assumes that you’re borrowing all the money to invest. If you have a big cash deposit, the top-ups will be lower.
But the cashflow of an investment property generally improves over time. This happens as rents rise and interest rates fall.
There are lots of different factors that impact the cashflow of your property, so you can either use:
This will give you a sense of whether you can afford an investment property on an ongoing basis.
If you’re planning to buy a New Build property, you’ll need:
If, on the other hand, you plan to buy an existing property, you’ll need:
If you’ve read this article and worry you can’t afford an investment property right now – that’s OK. We can still help you.
There are a lot of people out there who want to get ahead financially, but who can’t get a loan to invest. At least, not yet.
That’s where you can read our investment-ready playbook. This gives you real strategies you can use to get investment-ready faster. You'll just need to create an account for Opes+ and find it under "guides and courses".
| Auckland New Build | Christchurch New Build | Whangarei Existing Property | |
| Purchase price | $700,000 | $550,000 | $450,000 |
| Renovation | $0 | $0 | $70,000 |
| Mortgage | $700,000 | $550,000 | $520,000 |
| Revenue | |||
| Rent per week | $650 | $500 | $520 |
| Vacancy (weeks with no tenant) | 4 | 2 | 4 |
| Total rent per year | $31,200 | $25,000 | $24,960 |
| Costs | |||
| Operating costs | $12,000 | $10,000 | $15,000 |
| Interest rate | 5% | 5% | 5% |
| Mortgage costs | $35,004 | $27,504 | $26,004 |
| Total expenses per year | $47,004 | $37,504 | $41,004 |
| Total | |||
| Cashflow | -$15,804 | -$12,504 | -$16,004 |
| Cashflow per week | -$304 | -$240 | -$309 |
This assumes that you’re borrowing all the money to invest. If you have a big cash deposit, the top-ups will be lower.
Cashflow can improve as rents rise or your mortgage rate falls.
There are lots of different factors that impact the cashflow of your property, so you can either use:
This will give you a sense of whether you can afford an investment property on an ongoing basis.
No two properties or mortgages are the same, so top-ups vary based on:
If the costs are higher, or you have a big mortgage, the expenses are higher, so the top-up is larger.
This is why top-ups are more common with the No Cash Needed method {link} (borrowing the full amount). A bigger deposit means a smaller mortgage and usually a smaller top-up.
Keep in mind holding costs can still shift. For instance, if interest rates rise, your top-up rises too, so it’s worth stress-testing the numbers.
Let’s say you want to buy an investment property. The rent doesn’t cover all the costs, so you need to top it up by $200 a week.
But you’re not sure whether you can afford that. That’s where you might use the ‘Can I Invest’ Test.
Put that $200 aside every week, as if you have already bought the property.
After 2-3 months, check in:
If you’ve managed to put the money aside without touching it … you’ve passed the test.
Here’s how to set up the test in 4 minutes:
If you get paid fortnightly, just do one fortnightly payment ($400 in this case). It doesn’t have to be weekly.
Same deal if you get paid monthly, but it must be automatic.
And it can often be useful if you set it up to automatically transfer the day after you get paid.
That way the money’s already moved before you even think about spending it.
To afford an investment property you need more than a deposit. You also need enough income for the bank to lend to you and enough spare cash each week to hold the property.
That’s why the best place to start is with your own numbers.
Do you have enough deposit or usable equity? Will the bank lend you enough? And after paying your normal bills, do you still have enough left over to cover the property’s weekly shortfall?
If you’re not sure about that last one, try the Can I Invest Test. Put the expected top-up aside each week for a few months and see how your budget handles it.
If you can do that comfortably you may be closer to investing than you think.
If you can’t, that’s useful too. It tells you what needs to change before you buy.
Ben has 14 years of experience as a mortgage advisor and background as an investment adviser.
Ben brings a wealth of experience to the table with his 14 years as a mortgage advisor and background as an investment adviser. His dedication to helping clients reach their financial goals is central to his work.
This article is for your general information. It’s not financial advice. See here for details about our Financial Advice Provider Disclosure. So Opes isn’t telling you what to do with your own money.
We’ve made every effort to make sure the information is accurate. But we occasionally get the odd fact wrong. Make sure you do your own research or talk to a financial adviser before making any investment decisions.
You might like to use us or another financial adviser