NZ mortgage repayment and stress test

This is a practical estimate using standard amortisation (PMT) plus a stress-test rate. Banks use their own rules, so treat this as guidance, not approval.

Your details

Enter rough numbers. This is a calculator, not a bank decision engine.

Loan amount (NZD)Current interest rate (%)Stress margin (%)Banks often test higher than today's rate.Term requested (years)Your ageRetirement ageAnnual income (before tax)Monthly expenses

How KiwiHelp checks affordability: income minus expenses is compared against the stress-test repayment. This is a conservative indicator, not a formal approval.

Results

Test rate used: 9.00%

Looks affordable (simple check)

Max term allowed (by age)

30 years

Based on retirement age 70 and your age 35

Term used for calculation

30 years

Matches your requested term.

Monthly repayment (current rate)

$3,792.41

6.50%

Weekly repayment (current rate)

$875.17

Approximate (monthly x 12 / 52)

Monthly repayment (stress test)

$4,827.74

9.00%

Weekly repayment (stress test)

$1,114.09

Approximate (monthly x 12 / 52)

Disposable income (monthly)

$6,500.00

$10,000.00 income - $3,500.00 expenses

DTI (rough indicator)

5.00x

Loan / annual income. Not a bank rule here, just context.

Plain-English meaning

If rates rise to 9.00%, your estimated monthly repayment becomes $4,827.74.
Your term is capped at 30 years based on retirement age. Shorter terms push repayments up.
This tool uses a simple affordability check. Real lenders also consider debt, dependents, buffers, and policy.

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Important disclaimer

KiwiHelp is not a lender, mortgage broker, or financial adviser. This tool provides estimates only and is not financial advice. KiwiHelp does not guarantee rates, approvals, outcomes, or adviser availability. Please do not include bank logins, IRD numbers, or sensitive documents.

Note: KiwiHelp is not a lender, mortgage broker, or financial adviser. If you request a callback, your details may be shared with a licensed mortgage adviser in your area, subject to availability.

Note: This tool does not fetch bank-specific affordability models. It uses a common broker approach: a higher test rate and a max term capped by retirement age. Always confirm with a lender or mortgage adviser.

Your details

Enter rough numbers. This is a calculator, not a bank decision engine.

Loan amount (NZD)Current interest rate (%)Stress margin (%)Banks often test higher than today's rate.Term requested (years)Your ageRetirement ageAnnual income (before tax)Monthly expenses

How KiwiHelp checks affordability: income minus expenses is compared against the stress-test repayment. This is a conservative indicator, not a formal approval.