This calculator works out how long it will take to save a deposit for your first home in New Zealand, and shows what brings that date forward. You enter your target deposit, how much you already have saved, how much you can put aside each month, the interest rate your savings earn, and any KiwiSaver balance you expect to withdraw under the first home withdrawal rules. From these figures it projects your starting point, made up of savings plus KiwiSaver, how much you still need to save, the interest you are likely to earn as your balance grows, and the total time in years and months until you reach your goal. It adds your monthly contribution and interest to your balance each month until the target is hit, so you can see the effect of saving more, earning a better rate, or adding a KiwiSaver withdrawal. Try lifting your monthly saving to see how many months it shaves off the timeline, or add your KiwiSaver amount to see how much sooner you could get there. If your savings and KiwiSaver already cover the target, the calculator tells you so. Because it relies on the figures you enter and assumes a steady saving pattern and interest rate, treat the result as a planning estimate, and check your KiwiSaver eligibility with your provider before relying on a withdrawal amount.
KiwiSaver first home withdrawal is subject to the rules, including a minimum amount that must be left in the account, so check your eligibility. Interest is applied monthly on your growing balance. Estimate only, not financial advice.
The calculator starts with your current savings plus any KiwiSaver you can withdraw, then adds your monthly saving each month and applies interest on the balance. It counts the months until the balance reaches your target deposit. Increasing your monthly saving is usually the fastest lever, while interest and a KiwiSaver withdrawal both bring the goal closer. If you already have enough, it tells you that too.
With a $120,000 target, $25,000 saved, $30,000 of KiwiSaver available, and $1,500 saved a month at 4% interest, you start at $55,000 and need $65,000 more. That takes about 3 years 1 month, including roughly $10,700 of interest earned along the way, around seven months sooner than the 3 years 8 months it would take with no interest. Lifting the monthly saving shortens it noticeably.
If you've found a bug, or would like to contact us, or learn more about James Graham and Calculate.co.nz.
Calculate.co.nz is partnered with Interest.co.nz for New Zealand's highest quality calculators and financial analysis.
Calculate.co.nz is the sister site of CalculatorHub.com, the world's largest calculator website by tool count.
All calculators and tools are provided for educational and indicative purposes only and do not constitute financial advice.
Calculate.co.nz is proudly part of the Realtor.co.nz group, New Zealand's leading property transaction literacy platform, helping Kiwis understand the home buying and selling process from start to finish. Whether you're a first home buyer navigating your first property purchase, an investor evaluating your next acquisition, or a homeowner planning to sell, Realtor.co.nz provides clear, independent, and trustworthy guidance on every step of the New Zealand property transaction journey.
Calculate.co.nz is also partnered with Health Based Building and Premium Homes to promote informed choices that lead to better long-term outcomes for Kiwi households.
Calculate.co.nz is hosted in Auckland via SiteHost new Zealand.
All content on this website, including calculators, tools, source code, and design, is protected under the Copyright Act 1994 (New Zealand). No part of this site may be reproduced, copied, distributed, stored, or used in any form without prior written permission from the owner.
About & trust: Why Calculate is NZ's most comprehensive · By the Numbers · How we compare · Editorial standards · How we keep data current · NZ finance glossary · Research & data · Financial literacy NZ · About · Privacy policy · Terms of use
Reviewed and maintained. Last reviewed 2026-07-02 and checked on a twice-monthly cycle against IRD, RBNZ and Stats NZ. How we keep data current.
© 2026 Calculate.co.nz. All rights reserved. Building free NZ calculators since 2011.