How much do extra mortgage repayments save in NZ?

On a $600,000 mortgage at 6.5% over 30 years, paying an extra $100 per week saves approximately $120,000 in interest and reduces the loan term by nearly 7 years.

What is a good mortgage interest rate in NZ?

NZ mortgage rates vary with the OCR and global conditions. As of 2025, fixed rates typically range from 5.5% to 7.5% depending on the fixed term.

How much deposit do I need to buy a home in NZ?

Most NZ banks require a 20% deposit for owner-occupiers (80% LVR). First home buyers may qualify for the Kāinga Ora First Home Loan with just 5% deposit.

Can I use KiwiSaver to buy my first home in NZ?

Yes. After contributing to KiwiSaver for at least 3 years, first home buyers can withdraw most of their balance (keeping $1,000) to put toward a deposit.

NZ Mortgage Calculator — PropertyMetrics NZ

Quick Answer

A NZ mortgage repayment depends on the loan amount, interest rate, and term. On a $600,000 loan at 6.5% over 30 years, principal & interest repayments are approximately $3,792/month. Owner-occupiers need at least a 20% deposit (LVR ≤ 80%); investors need 35% (LVR ≤ 65%). Enter your loan details below to calculate monthly repayments, total interest paid, and compare principal & interest against interest-only.

Quick Presets

Loan details

Property Price

Deposit

Interest Rate

Loan Term

yrs

Repayment Type

Frequency

Loan to Value Ratio (LVR)

80% High LVR

Deposit $150,00020%

Loan Amount $600,00080%

Your Results Stress tested

Weekly Repayment

—

Principal & Interest

30 years • 6.5% • Weekly

Total Interest

—

Total Cost

—

Loan Amount

—

LVR

—

Rate Stress Test

6.5% (current)

—

baseline

7.5% (+1%)

—

8.5% (+2%)

—

NZ bank-aligned

Calculations use NZ lending standards and guidelines.

Private & secure

Your data stays private and is never shared.

Up to date

Live interest rates and policy updates.

Trusted by Kiwis

Used by homeowners, investors and professionals across NZ.

Mortgage Calculator

Loan details

Your situation

Extra repayment details

NZ bank-aligned

Private & secure

Up to date

Trusted by Kiwis