How to budget for your first home
From Aaron’s TikTok: “How to budget for your first home — because it’s a big step!”
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Posted 17 April 2026
The short version
- Work backwards: target house price, minus KiwiSaver and any help, equals the cash you still need. Divide by your weekly surplus and you have your timeline.
- Budget from your real bank statements, not the fantasy version of your spending. The bank will read the real ones anyway.
- Automate it: deposit savings leave on payday, before you can spend them. Willpower is not a plan.
- Budget past settlement day too — rates, insurance and maintenance join your repayments, and the bank wants to see room for them.
Start from the end and work backwards
A first home budget starts with a number, not a feeling. Roughly what do homes cost in the area you would actually buy in? What deposit does that imply? Subtract your KiwiSaver first-home withdrawal and any family help, and what is left is the cash you still need to find. Divide that by what you can genuinely put away each week and you have the only number that matters: how many weeks away you are.
That number is often confronting, and sometimes it is confronting in the good direction — plenty of people discover they are closer than they assumed, especially once KiwiSaver and low-deposit options are counted properly. Either way, you cannot plan around a number you have never calculated.
Build the budget off your real statements
Print your last three months of bank statements and add up what actually happens: rent, groceries, subscriptions, eating out, the lot. Most people find a gap between what they think they spend and what they do spend, and that gap is usually the deposit money. Budgeting from reality also has a second payoff: those same statements are exactly what a lender will read when you apply, so cleaning them up is doing the application groundwork early.
Then make the saving automatic. A transfer to a separate account on payday, sized to your real surplus, removes the weekly decision entirely. If it never lands in the everyday account, it never gets spent.
Budget for owning, not just buying
The budget that gets you the keys is not quite the budget that keeps them. Once you own, repayments replace rent, and rates, house insurance and maintenance arrive alongside them. Build a version of your budget with those lines in it now — it tells you what price range genuinely fits your life, rather than the maximum a calculator will print.
There is a bonus: if your budget shows you can live on the after-mortgage version of your income, start living on it now and bank the difference. You prove the affordability to yourself and to the bank, and your deposit grows faster at the same time. When you want a second pair of eyes on the plan, that is exactly what Aaron is for — and it costs you nothing.
This is general information, not personalised financial advice. For advice on your situation, talk to Aaron.
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