How much should I save? The 50/30/20 rule for Kiwis

"How much should I save?" is one of the most common money questions in New Zealand, and the honest answer is it depends, but there's a simple rule that gives you a solid starting point. This guide explains the 50/30/20 rule, how to apply it to your Kiwi take-home pay, and where things like an emergency fund and KiwiSaver fit.

The 50/30/20 rule, in plain NZD

Split your take-home pay (what lands in your account after tax) three ways:

• 50% needs: rent or mortgage, power, groceries, transport, insurance.
• 30% wants: eating out, streaming, hobbies, travel.
• 20% savings and debt: emergency fund, KiwiSaver top-ups, savings goals, and extra debt repayments.

So if your take-home is $1,000 a week, that's roughly $200 a week going to savings and debt. Not sure of your take-home? The free NZ pay calculator works it out from your salary, and the budgeting guide shows how to set the buckets up.

It's a starting point, not a straitjacket. In high-rent cities, "needs" can blow past 50%, and that's fine; just trim "wants" rather than abandoning the 20% savings.

Start with an emergency fund

Before any other goal, build a small emergency fund somewhere safe and easy to reach (a separate savings account). A common target is three months of essential expenses; even a $1,000 to $2,000 starter buffer stops a car repair or vet bill from becoming debt.

Then: KiwiSaver and your goals

• KiwiSaver is a quiet powerhouse. Your contributions, your employer's match, and the annual government contribution all stack up. If you're not contributing enough to claim the full government top-up, you're leaving free money behind; our KiwiSaver calculator shows the gap.
• Specific goals like a trip, a car or a house deposit are easier to hit when you know the weekly number. The savings goal planner takes your target and date and tells you exactly how much to put away each week.

Make it automatic

The single biggest predictor of saving isn't income. It's automation. Set up an automatic payment that moves your savings out the day you're paid, before you can spend it ("pay yourself first"). What's left is your spending money, guilt-free.

KeaBudget, a free budget app built for New Zealand, helps you see all of this in one place: your take-home, your buckets, and progress toward each savings goal, in NZD with NZ categories.

How much is "enough"?

There's no universal number, but a reasonable progression looks like:

1. A starter emergency fund ($1,000 to $2,000).
2. Enough KiwiSaver to claim the full government contribution.
3. A 3-month emergency fund.
4. Saving 20% (or as close as you can) toward your goals.

Start with whatever you can. Even 5% beats 0%, and you can ratchet it up with each pay rise. The habit matters more than the amount.

This guide is general information, not financial advice. For free, impartial tools, Sorted is a great NZ resource.