Let’s be honest — most of us have made a few money mistakes. I know I have.
The problem isn’t the mistakes themselves. It’s when they become habits, doing damage in the background while life carries on.
The good news is that recognising these patterns is genuinely half the battle.
Once you can see what’s going wrong, you can start fixing it — and the fixes are usually simpler than you’d expect.
Here are ten money mistakes that are incredibly common, and what to do instead.
1. Impulse Buying
We’ve all been there. You pop in for one thing and come out with five.
Or you’re scrolling at 11pm and something lands in your cart before you’ve even thought it through.
Impulse buying is one of those habits that feels harmless in the moment but absolutely wrecks a budget over time.
The thing is, it’s not really about willpower — retailers are very, very good at triggering the urge to spend.
A shopping list is your best defence. Write it before you go, stick to it when you’re there. For online purchases, try the 24-hour rule: leave it in your cart overnight. You’ll be amazed at how often you don’t actually want it by morning.
If impulse buys are a real weakness, giving yourself a small “fun money” allowance each week can help. You can spend it on whatever you like — guilt-free — but once it’s gone, it’s gone.
2. Living Paycheck to Paycheck
This one is more common than people admit. You’re earning a decent income, but by the time the next pay comes in, there’s nothing left.
It feels like running on a treadmill — lots of effort, no forward movement.
The trap is that when there are no savings sitting in the background, any unexpected cost becomes a crisis. Car repairs, a dentist bill, a broken appliance — suddenly you’re scrambling.
Getting off the paycheck-to-paycheck cycle starts with understanding exactly where your money is going. Track everything for a month — not to judge yourself, just to see the reality. Most people find at least one or two leaks they didn’t know were there.
Even putting aside $20–$50 per pay is a start. It doesn’t sound like much, but it builds momentum, and momentum matters.
3. Not Saving for Emergencies
Closely related to the above — but worth its own spot on this list, because so many people skip this step even when they’re otherwise doing okay financially.
Life will throw things at you. That’s not pessimism, it’s just reality. The car will need work. The kids will need something unexpected. The hot water cylinder will pick the worst possible moment to die.
Without an emergency fund, those moments send you straight to the credit card or the buy-now-pay-later app — and that’s where the real damage starts.
Aim to build up three to six months of living expenses over time. It won’t happen overnight, but start somewhere. Even $500 sitting in a separate account gives you breathing room you didn’t have before.
4. Ignoring Credit Card Debt
Credit card debt is the kind of thing people avoid looking at because looking at it feels bad. But ignoring it doesn’t make it smaller — interest does the opposite of that.
Credit cards typically charge very high interest rates. If you’re only paying the minimum each month, you could be paying off a balance for years and barely touching the actual debt. It’s genuinely one of the most expensive ways to borrow money.
If you’ve got credit card debt sitting there, it’s worth making it a priority. Even paying a little extra above the minimum makes a real difference. And if you can stop adding to the balance while you pay it down, even better.
Managing credit card debt takes some discipline, but the relief when it’s gone is worth every bit of effort.
5. Not Tracking Expenses
“I have a rough idea of where my money goes” is something a lot of people say — and it’s almost never as accurate as they think.
The truth is, small spending adds up in ways our brains are really bad at accounting for. A few coffees, a couple of online purchases, some takeaways — none of it feels significant in the moment, but together it can easily account for hundreds of dollars a month.
Tracking your spending, even just for a few weeks, tends to be eye-opening. You don’t have to do it forever. But doing it regularly enough to stay honest with yourself is one of the simplest things you can do for your finances.
There are plenty of apps that make it easy, or you can keep a simple spreadsheet. The method doesn’t matter — the awareness does.
6. Skipping Budgeting
A budget isn’t a punishment. It’s just a plan for your money — a way of telling it where to go before it mysteriously disappears.
Without one, spending tends to expand to fill whatever’s available. There’s no natural stopping point. And when something comes up at the end of the month, there’s nothing left to cover it.
You don’t need a complicated system. A basic budget that accounts for your income, fixed costs, savings, and spending is enough to make a real difference. The key is doing it regularly — even a quick monthly check-in keeps you connected to what’s actually happening.
If budgeting has felt overwhelming in the past, start small. Just knowing your numbers is already a step ahead of most people.
My favourite budgeting system is the zero-sum budget. I’ve got a super helpful blog and spreadsheet template you can download for free here.
7. Overlooking Interest Rates
Interest rates affect almost every financial decision you make — borrowing, saving, mortgages, credit cards — and yet most people don’t pay nearly enough attention to them.
On the debt side, high interest rates mean you’re paying significantly more than the sticker price for whatever you’ve borrowed. On the savings side, a high-interest account can make your money work harder without any extra effort from you.
It’s worth shopping around when you borrow, and being intentional about where you keep your savings. A few minutes comparing options can save you a meaningful amount over time.
When your mortgage or any fixed-rate loan comes up for renewal, don’t just accept the first offer. Ask questions, compare, and negotiate if you can.
8. Neglecting Retirement Savings
Retirement feels very far away when you’re in the thick of raising kids and paying the bills. I get it. But time is genuinely the most powerful tool you have when it comes to saving for later life, and every year you delay is harder to make up.
In New Zealand, KiwiSaver is one of the easiest ways to start. If you’re employed and contributing, your employer contributes as well — that’s essentially extra money you’d forgo if you opt out. The government also chips in through the member tax credit each year.
Even contributing at the minimum rate adds up significantly over decades. If you’re not in KiwiSaver yet, it’s worth looking into — and if you are but haven’t thought about it in a while, it might be time to check your fund type and contribution rate.
Future you will thank present you.
9. Underestimating Small Purchases
The $6 coffee. The $3 app subscription you forgot about. The sneaky little “add-on” at the checkout. Individually, none of these feel like a problem.
But small purchases are where budgets bleed out. A few dollars a day easily add up to $100–$150 a month — money that could be sitting in your emergency fund or paying down debt.
This isn’t about never buying a coffee. It’s about being intentional. When you track your spending and actually see what the small stuff adds up to, you get to consciously decide whether it’s worth it — rather than just drifting along, spending without thinking.
Sometimes it is worth it. Sometimes it isn’t. But you should be the one making that call.
10. Spending Too Much on Vices
No judgment here — but vices are worth an honest look when it comes to your budget.
Whether it’s wine, cigarettes, takeaways, online gambling, fancy coffee, or just a habit of treating yourself whenever stress hits — these things cost more than most people realise. Not just financially, either, but that’s a conversation for another day.
The issue isn’t that you enjoy things. It’s when spending on those things runs on autopilot, goes outside the budget, and undermines your financial goals.
Cigarettes in New Zealand are eye-wateringly expensive. A bottle of wine a few nights a week adds up to hundreds a month. Regular takeaways can easily rival the cost of a weekly grocery shop.
Again, not saying cut it all out. But be honest with yourself about what you’re spending, and whether it lines up with what you actually want your money to do.
Understanding Financial Literacy
Financial literacy is one of those things that sounds dry but is genuinely life-changing. It’s not about being a numbers person — it’s about understanding how money works well enough to make good decisions with yours.
What Financial Literacy Actually Means
At its core, financial literacy means understanding the basics: budgeting, saving, investing, and managing debt. It means being able to read a situation — like whether a deal is actually a deal, or whether you can really afford something — and make a call based on facts rather than feelings.
Here are the building blocks:
- Budgeting: Knowing where your money goes and making a plan for it.
- Saving: Setting money aside before life forces your hand.
- Investing: Making your money grow over time, rather than just sitting still.
- Debt Management: Understanding what you owe, what it costs you, and how to get rid of it.
None of this is complicated once you start. The hard part is just getting started.
Why It Matters
Financial literacy matters because, without it, you’re making decisions blind. And that’s when the mistakes happen — not because people are careless, but because nobody ever taught them this stuff.
Most of us were never given a proper financial education. We were expected to just figure it out. And a lot of people are still figuring it out the hard way, through debt, stress, and regret.
The good news is it’s never too late to learn. And once you do:
- Debt becomes manageable — because you understand how it works and how to tackle it.
- Wealth becomes possible — because you know how to make money grow, not just spend it.
- Goals become real — because you can actually plan for them, rather than just hoping.
You don’t need to become a financial expert. You just need to know enough to make good decisions for your own life — and that’s completely within reach.
