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Personal Loan Calculator NZ: Compare Two Loan Scenarios Side-by-Side

Updated 3 May 2026
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A personal loan can pay for a wedding, a renovation, debt consolidation, an emergency expense, or a planned purchase. But the loan structure you choose, specifically the amount, term, and interest rate, makes a much bigger difference to the total cost than most borrowers realise.

​Our Personal Loan Calculator lets you compare two loan scenarios at once so you can see which structure costs less, and by how much, before you commit.​
How to Use Our Personal Loan Calculator
  • Enter the loan amount, term in years, and interest rate for Scenario A in the left panel. Then enter a different combination in Scenario B in the right panel.
  • The calculator instantly shows the monthly payment, total interest paid, and total cost of each scenario, plus the dollar difference between them in the centre verdict bubble.

Below the inputs, the calculator's insight panel explains in plain English which scenario is cheaper and why, whether that's because of a shorter term, a lower rate, a smaller loan amount, or a combination of factors.

You can also click any of the preset comparison buttons at the bottom to load common comparisons:
  • Long term vs short term - same loan, different repayment periods
  • Lower rate vs higher rate - what difference does shopping around make
  • Borrow more vs borrow less - should you take the larger loan you qualify for, or stick to what you actually need

Compare two loan scenarios

Adjust each scenario to see how loan amount, term, and interest rate affect your monthly payment and total interest paid.

Scenario A
Amount $
Term years
Rate %
Monthly $0
Interest: $0 Total: $0
Difference $0
Scenario B
Amount $
Term years
Rate %
Monthly $0
Interest: $0 Total: $0
i

Both scenarios cost the same. Adjust either side to see how loan choices affect your borrowing cost.

Try a comparison:
Know This: Personal loan structures affect what you'll pay
  1. Shorter terms always save interest, but stress your monthly cash flow: A $10,000 personal loan at 11% over 3 years costs roughly $1,786 in total interest. The same loan over 5 years costs $3,045, almost 70% more. The trade-off is that the 3-year version requires $327/month in repayments instead of $217/month. If you can afford the higher monthly payment without straining your budget, the shorter term is almost always the better financial decision.
  2. The interest rate matters more than the establishment fee: A loan with a slightly lower rate but a higher establishment fee usually beats a loan with the reverse structure over any meaningful loan term. Always compare the total cost of borrowing (rate + all fees + monthly account charges), not just the headline rate. Our calculator shows you the rate effect in isolation so you can layer the fees on top yourself.
  3. Your credit profile decides what rate you actually get: Lender websites advertise their best rates, typically only available to borrowers with strong credit, stable income, and a clean repayment history. The rate you'll actually be offered may be 2 to 5 percentage points higher than the advertised rate. Apply with at least two lenders to see what you'd really qualify for before locking in a budget.

​Compare Personal Loan Rates From New Zealand's Major Lenders

Once you've worked out your ideal loan structure above, the calculator below shows what each major NZ personal loan provider would actually charge you. Lenders are listed in our editorial order.

Enter your loan details

Repayment frequency
Important: Calculations use the standard amortisation formula and reflect the interest rate only. Establishment fees, monthly account fees, and other lender charges are not included and may apply on top of these figures. Interest rates shown are advertised rates and may vary based on your credit profile, the loan amount and other factors. Always confirm current rates and fees directly with the lender before applying.

Frequently Asked Questions

Should I get a 3-year or 5-year personal loan?

A shorter loan term is almost always cheaper in total interest, but the higher monthly payment has to fit your budget without straining it.
  • As a rough guide, a $10,000 loan at 11% interest costs $1,786 in interest over three years compared to $3,045 over five years - that's $1,259 extra you pay for the longer term.
  • Borrowers will usually take the shorter term if they can comfortably afford the higher monthly repayments, have a stable income, and don't anticipate major expenses (such as a house move or starting a family) during the loan period.
  • Others will take the longer term only if the shorter monthly payment would leave them exposed to bills, with no emergency buffer, or unable to keep saving toward other goals.
  • While the five-year term is rarely the better financial choice, it can be the safer cash-flow choice depending on your circumstances.

What's the difference between secured and unsecured personal loans?

A secured personal loan is backed by an asset you own - usually a car, but sometimes a boat, motorbike, or other valuable item - that the lender can take if you fail to keep up with repayments.

An unsecured personal loan has no collateral, so the lender's only way to collect what is owed is to report the borrower's account to credit bureaus and pursue debt collection.

Overall:
  • Secured loans typically offer interest rates 1 to 4 percentage points lower than unsecured loans for the same borrower, because the lender's risk is reduced.
  • ​The trade-off is that defaulting on a secured loan can mean losing your car, which makes getting to work harder, which in turn makes recovering from the financial difficulty harder again.
  • Unsecured loans cost more in interest but cause less damage to your credit history if things go wrong. Most lenders offer both, and your decision should weigh the rates against the consequences of failing to repay during your worst-case scenario, not your best.

How much can I borrow on a personal loan?

Most New Zealand personal loan providers cap unsecured borrowing between $30,000 and $100,000, depending on the lender, your credit profile, your income, and your existing debts.

Secured loans can sometimes go higher, up to $100,000 or more, where the asset's value supports it. The amount you'll actually be approved for depends on what the lender's affordability test shows, which typically allows total monthly debt repayments (including the new loan) to consume no more than 30 to 40 percent of your gross monthly income, with the test rate usually 1 to 2 percentage points above the actual loan rate to allow for future rate increases.

What's a good interest rate for a personal loan in New Zealand right now?

For a borrower with strong credit and stable income, "good" currently means anywhere between 7 and 10 percent for an unsecured personal loan. Below 7 percent is genuinely excellent and usually only available to borrowers with excellent credit on secured loans.

Between 10 and 13 percent is acceptable, but worth shopping harder - most borrowers in this range can find a better offer with one or two more lender applications.

Above 14 percent for an unsecured personal loan is poor value, and you should investigate whether your credit profile genuinely justifies that rate or whether the lender is simply expensive.

Know This: Bank personal loan rates are typically the highest in this market because banks aren't competing aggressively for personal loan business - they make most of their money on mortgages. The most competitive rates are usually offered by specialist personal lenders and credit unions, not the four big banks. If you're being quoted 14 percent or higher, get a quote from at least two specialist lenders before signing anything.
Christopher Walsh
MoneyHub Founder
Unlock the Best Personal Loan Rates with MoneyHub – Don't Overpay When Getting Personal Loan

After tracking lender behaviour and reading hundreds of NZ personal loan applications over the years, my research consistently points to three providers that deliver the best combination of rate, service, and fairness:
Checking what interest rate you'll get is quick and easy - just a few minutes could save you thousands, given the range of interest rates. 

Remember, it's the interest rate you agree to now that makes a huge difference when you repay your loan week after week. We believe that signing up for finance with a car salesperson or via a bank is unlikely to be the cheapest option.

Advertising Disclosure: We may earn a commission from loans, but our top picks are always based on rigorous research and your best interest.
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