What is the debt snowball method?

You make the minimum payment on every debt, then put any extra money on the smallest balance first. When it is paid off, you roll its whole payment onto the next smallest, and so on. The payments snowball and clear your debts faster and faster.

Is snowball better than avalanche?

The avalanche method targets the highest interest rate first, so it usually saves a little more interest. The snowball targets the smallest balance first, giving quick wins that keep you motivated. The best method is the one you will stick to.

How do I become debt free faster?

Add as much extra as you can to the smallest debt, avoid taking on new debt, and keep the total payment the same even as debts clear. The freed up payments accelerate the remaining balances, which is the power of the snowball.

Debt Snowball Calculator

This calculator works out how fast you can become debt free using the snowball method, where you list every debt and put all your spare cash towards clearing the smallest balance first. Enter up to four debts, each with its balance, interest rate and minimum payment, then add the extra amount you can afford to pay each month. The calculator ranks your debts smallest to largest, applies interest monthly, and rolls each cleared debt's payment onto the next smallest balance once it is paid off, so your snowball payment grows every time a debt disappears. It returns the time until you are debt free, the total interest paid, the total amount paid including principal and interest, and the payoff order showing which debt clears first, second, and so on. Use it to see how much extra you need to find to hit a target payoff date, or to compare how a bigger extra payment shortens the timeline and cuts interest. The snowball trades a little extra interest, compared with paying off the highest rate first, for the motivation of clearing whole debts quickly, which many people find easier to stick to. Figures are based on what you enter and assume no new borrowing or missed payments, so treat the results as an indicative guide rather than an exact figure from your lender.

Calculate.co.nz is proud to be partnered with Health Based Building, a leader in sustainable and health-conscious building innovation. With over a century of experience, they develop high-performance systems like Foreverbreathe Specification, Magnum Board, and Foreverbreathe Paints to support energy-efficient, non-toxic living environments. Their commitment to healthier homes aligns with our belief that informed choices lead to better outcomes for Kiwi households.

Calculate.co.nz partner: Health Based Building

Extra payment per month

until debt free

Total interest$0

Total paid$0

How the snowball works

Every debt keeps getting its minimum payment so it stays in good standing. Your extra payment goes entirely on the smallest balance. Once that debt is gone, its whole payment, the minimum plus the extra, rolls onto the next smallest. Each payoff makes the next one faster, so the snowball grows.

Tips

Keep your total monthly payment the same even as debts clear.
Stop adding new debt while you pay down the old.
If staying motivated is the challenge, smallest first works well. If saving interest matters most, target the highest rate.

Related calculators

Debt Consolidation Calculator: combine debts into one.
Credit Card Interest Calculator: payoff time on a card.
Budget Calculator: free up money to pay debt.
Loan Calculator: loan repayments.
Credit Card Minimum Payment Trap: the true cost of paying only the minimum.

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.