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KiwiSaver vs Loan Payoff Calculator

Q: Question 1: Is paying off my mortgage really a 'guaranteed, tax-free' return?

There is no single 'good' yield, as it depends entirely on the region and the property type. Generally, in major centers like Auckland or Wellington, a gross yield of 3.5% to 4.5% is common, with investors relying more on capital growth. In regional New Zealand, investors typically target higher gross yields of 5% to 7% to ensure the property is cash-flow positive.

Q: Question 2: Should I stop my KiwiSaver contributions completely while paying a mortgage?

Gross rental yield is calculated using the formula: Annual Rent ÷ Purchase Price x 100. This gives you a percentage that represents the total annual rent as a proportion of the purchase price.

Q: Question 3: Why does this calculator assume a 5% KiwiSaver return?

Both new builds and existing properties have different yield characteristics. New builds often have lower gross yields but may offer better depreciation benefits and lower maintenance costs. Existing properties in regional areas typically offer higher gross yields. Compare the full pros and cons in the New Build vs. Existing Property Investment guide.

Q: Question 4: Can an offset mortgage help without choosing between the two?

No, rental yield calculations exclude mortgage interest. Yield is calculated based on the purchase price and rental income, not your financing costs. Mortgage interest is a separate consideration when calculating your actual cash flow and return on investment.

Q: Question 5: What is my next step after running the calculator?

Running the yield on a property is the first step. The second step is proving to the bank that the rent, combined with your personal income, is enough to secure the mortgage. At Home Loan Factory, we specialize in structuring investment finance and can run your figures through the exact servicing test the banks use to tell you instantly if you will be approved for the purchase.

Compare the mathematical return of paying down your home loan faster versus putting extra funds into KiwiSaver

Salary (Before Tax) $85,000

Mortgage Rate 7.0%

Pause Duration 3 Years

If you PAUSE KiwiSaver

Annual Yield (Per Year)

Cash available to redirect Your 3.5% stops going to KiwiSaver, landing in your pocket instead.

Mortgage Interest Saved The actual financial gain of putting that cash against your home loan.

Total Annual Gain:

If you KEEP KiwiSaver

Annual Yield (Per Year)

Employer Match Their 3.5% match, minus ESCT tax.

Government Match Max $260 a year.

Est. Fund Growth (5%) Assumed 5% return across your cash, employer match, and govt match.

Total Annual Gain:

Total Wealth Missed Out On

-$0

This is the estimated total uplift you miss out on over 3 years by pausing your KiwiSaver. Redirecting cash to your mortgage feels safe, but the interest you save rarely beats the combination of free matches and compounding fund growth. *Mathematical illustration based on a standard 3.5% employee/employer rate. Excludes compounding growth across multiple years to maintain visual simplicity. This assumes your contract is NOT a Total Fixed Remuneration (TFR) package where your employer deducts their match from your base salary.

KiwiSaver vs. Extra Mortgage Repayments

‍Got some spare cash? It's the classic Kiwi dilemma: do you throw it at the mortgage to get debt-free faster, or bump up your KiwiSaver for retirement? This calculator runs the numbers side-by-side so you can see which option leaves you better off.

It is 100% free to explore your numbers with no mandatory sign-ups, logins, or hidden data capture.

1. A Quick Heads-Up on the Math (The 5% Rule)

To make this comparison work, the calculator assumes your KiwiSaver grows at a flat 5% per year.
In the real world, your returns will bounce around depending on the market and what type of fund you're in (like conservative vs. growth). Think of this as a helpful guide to get your bearings, not personalized financial advice!

2. The Core Comparison

Guaranteed vs. Variable: Paying down your mortgage gives you a guaranteed, tax-free win. Whatever your interest rate is, that's exactly what you're 'earning' by not paying it to the bank. KiwiSaver, on the other hand, rides the ups and downs of the market.
The 'Free Money': It usually makes sense to contribute enough to KiwiSaver to grab your employer's 3.5% match and the yearly government bonus before overpaying your mortgage.

3. Flexibility & Access

Once money goes into KiwiSaver, it's locked away until you turn 65 (unless it's for a first home). Money you put into your mortgage cuts your interest bill right away, and if you structure your loan right, you can still access that cash if an emergency pops up.

Next Step: Structure Your Loan to Save

‍Seeing the numbers is just the start. Send your results to one of our advisers, and we'll help you structure your home loan—using tools like offset accounts or revolving credit—so you can smash your mortgage faster without locking up all your spare cash.

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FAQS

Frequently Asked Questions

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Question 1: Is paying off my mortgage really a 'guaranteed, tax-free' return?

Yep! Every dollar you pay off your mortgage early is a dollar you aren't paying interest on. If your mortgage rate is 6.5%, paying off an extra $10,000 guarantees you will save $650 a year in interest. That interest saving is locked in immediately, making it a fantastic, risk-free financial win compared to the variable nature of market investments.

Question 2: Should I stop my KiwiSaver contributions completely while paying a mortgage?

Usually, it's a good idea to keep contributing at least enough to get the 'free money'—that’s your employer’s 3% match and the annual government bonus (up to $521.43). For a lot of Kiwis, the sweet spot is grabbing those freebies first, and then throwing any leftover cash at the mortgage.

Question 3: Why does this calculator assume a 5% KiwiSaver return?

To give you a fair side-by-side comparison, we had to pick a baseline, so we use a flat 5% annual return for KiwiSaver. In reality, your actual returns will go up and down depending on the economy and whether you’re in a conservative, balanced, or growth fund. Paying off your mortgage, though? That return is locked in, no matter what the stock market is doing.

Question 4: Can an offset mortgage help without choosing between the two?

An offset mortgage is a brilliant middle ground. It lets you link your everyday savings accounts to your home loan, so your cash reduces the interest you pay daily—but you can still withdraw the money whenever you want. You can't link your KiwiSaver to an offset mortgage, but it’s a perfect way to make your regular savings work harder for you and significantly reduce your interest costs.

Question 5: What is my next step after running the calculator?

Remember, this calculator is just a helpful guide, not personalized financial advice! If you're ready to get serious about paying off your loan faster, get in touch with our team. We'll look at your specific numbers and help set up the right loan structure to save you thousands in interest.

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