WANT TO MAKE your money WORK hardER Than YOU doLEARN HOW TODAY

The Biggest Financial Mistakes Women Make in Their 30s to 40s

Your 30s and 40s are not too late to get your finances on track. From lifestyle inflation and financial avoidance to ignoring super, delaying investing, relying too heavily on a partner, and comparing yourself to others—small financial patterns can have a big impact over time. The good news? You’re not “bad with money,” and you’re not behind. Start by understanding where you are, make informed decisions, and take one step toward the financial future you want.

August 26, 2026

Your 30s and 40s is a crucial time financially for women. You may be earning more than you have, building a career, raising children, buying property, running a business or even navigating a relationship separation. From the outside, it can look like everything is falling into place. But behind the scenes, many women are quietly wondering why they still don’t feel financially secure.

I speak to women who are successful, intelligent and capable, yet feel overwhelmed when it comes to their money. They might have a good income but very little left at the end of the month. They have super but never really looked at how it is invested. 

They might own a home but feel weighed down by the mortgage, or simply have no idea whether they are on track for the future they want.

And then there's the thought that comes: “I should know better by now.”


I want to change that pattern.

You don’t automatically become financially confident because you turn 30 or 40. Most of us were never taught how to manage money properly. We learned about money by watching our parents, listening to what people around us said, making our own mistakes and figuring things out..

I’ve worked in finance for more than 20 years, and I’ve seen that financial behaviour isn’t simply about knowing the right thing to do. Our relationship with money is influenced by our experiences, our beliefs, our relationships and the stories we’ve created about what money means to us.

So when I talk about financial mistakes, I'm not talking about them from a place of judgment. I’m talking about the patterns I see, the patterns I’ve experienced myself and the things I wish more women understood about their money.

Mistake 1: Earning More But Never Actually Getting Ahead  

One of the financial mistakes people make during their 30s and 40s is assuming that earning more will automatically solve their financial problems.

It perfectly makes sense when you think about it. You get a promotion, change jobs or receive a pay rise, and suddenly you have more money coming in. Surely that should mean you’ll be better off. 

But your lifestyle grows with your income.

The house gets bigger. 

The car gets upgraded. 

Holidays become more expensive.

Eating out becomes more frequent. 

Subscriptions accumulate.

The things that once felt like luxuries slowly become normal expenses.

There’s nothing wrong with enjoying the money you earn. In fact, I think you should. Money is there to support your life, and you shouldn’t have to feel guilty about spending money on things that genuinely matter to you.

The problem is, when every increase in income disappears into an increased lifestyle.

You can be earning considerably more at 40 than you were at 30 and still feel like you are living from pay to pay. Your income has increased, but your financial security hasn’t necessarily increased with it. 

That's why I encourage women to think beyond income. The more important question is what your income is helping you build. 

Are you reducing debt?

Are you building savings?

Are you investing?

Is your super growing?

Are you creating more choices for your future?

You don’t need to put every pay rise away and live like you're still earning your first salary. But giving some of that additional income to your future self will make a significant difference over time.

Mistake 2: Avoiding Finances Because You Don’t Know Where To Start

Another mistake I see regularly is financial avoidance.

This isn’t necessarily because someone is irresponsible; it’s because they’re overwhelmed.

If you don’t understand investing, super or debt, opening your accounts can feel intimidating. If you’ve made financial mistakes in the past, looking at the numbers can bring up guilt or shame. And if money was a source of conflict in your family growing up, you may have to avoid financial conversations altogether. 

The trouble is that avoidance doesn’t make the problem smaller.

The credit card balance is still there.

The spending is still happening.

The super account is still sitting untouched.

The financial anxiety simply gets bigger because now you’re worrying about something you haven’t even looked at properly.

One of the most powerful things you can do is simply make it a focus and become curious about your money.

Look at your bank accounts.

Understand your regular expenses. 

Find out what debts you have and what they're costing you. 

Look at your savings and investments.

You don’t have to fix everything in one weekend. You don’t need a complicated spreadsheet or finance degree.

You just need to be willing to look. 

Clarity comes before control.

Once you know what is actually happening, you can start making decisions based on facts rather than fear.

Mistake 3: Thinking That A Good Income Means You’re Financially Secure

Income and wealth are not the same thing.

I’ve met women with very high incomes who still feel financially stressed, and I’ve met people with more modest incomes who have built strong financial foundations.

A high income gives you an opportunity to build wealth, but it doesn’t guarantee that you will. It will still depend on your spending habits.

What matters is what happens between the money coming in and the money going out.

If your income increases but your spending increases at the exact same rate, you may find yourself in exactly the same financial position a few years later, just with bigger numbers moving through your bank account.

This is why I like women to think about their financial position as a whole number (your Net Worth) rather than focusing on their salary.

What do you own?
What do you owe?
How much are you saving?

What are you investing?

What would happen if your income stopped for several months?

These questions tell you much more about your financial resilience than your salary..

Mistake 4: Leaving Your Super To Take Care Of Itself

Super is one of those things that is incredibly easy to ignore because retirement feels sooooo far away.

In your 30s, retirement can feel like a completely different lifetime. Even in your 40s, it can be tempting to tell yourself ‘there is plenty of time’.

And there is time. But that’s exactly why this is such an important period to start paying attention.

For many Australians, super will become one of their largest financial assets. Yet many people don’t know how much they have, where it is invested, what fees they are paying or whether they have insurance attached to their account.

That doesn’t make you bad with money. It simply means you’re probably never taken the time to understand it.

 Become informed.

Find your super.

Understand your balance and investment options.

Check your fees and insurance.

If you have multiple accounts, understand whether that is appropriate for your circumstances. And if you're unsure about what you should be doing, get professional advice.

Mistake 5: Waiting Until You Have “Enough” To Invest

Often I hear people say “ I’ll start investing when I have more money.”

Then they earn more money and still don’t invest.

There is always another priority.

The mortgage

The children

The renovation

The holiday

The car

The unexpected expense.

Of course, investing isn’t something you should rush into without having your financial foundations. If you’re carrying expensive debt or don’t have an appropriate emergency buffer, those things may need attention first.

But waiting until you feel completely financially comfortable can mean waiting forever.

Investing can feel complicated because there are so many options and opinions. But you don’t need to become a professional investor. You need to understand the basics, know your goals, understand your timeframe and be comfortable with the level of risk you’re taking.

And please don’t confuse investing with chasing whatever happens to be trending online. If someone promises you guaranteed returns from the latest investment opportunity, that’s usually a good reason to slow down rather than speed up.

The goal is to research or seek advice and make informed decisions that help your money grow over time.

Mistake #5: Letting Your Partner Responsible for Your Financial Life


There’s nothing wrong with dividing financial responsibilities in a relationship. Maybe one person manages the bills, and the other handles the investments. Maybe one person enjoys dealing with the mortgage and the other looks after the household budget.

The problem comes when one person knows everything and the other person knows nothing. 

I don't want women to feel that they have to manage every financial detail themselves. But I do want them to understand their own financial position.

This isn’t about expecting your relationship to fail.

It’s about recognising that life can change.

Your partner can absolutely be a part of your financial future. But you need to be part of it too.

Financial independence isn't about not needing anyone. It’s about knowing you have choices. 

Mistake # 6: Comparing Your Life With Everyone Else’s

Social media has made this harder.

You see someone’s beautiful home, expensive holiday, new car or successful business, and it can be easy to assume that they’re doing better financially than you are. 

But you don’t know the story behind the photo or post.

You don’t know their debt.

You don’t know their income.

You don’t know what they have sacrificed to maintain that lifestyle.

You don’t know whether their version of financial success would actually make you happy.

Comparing can lead us to make some very expensive decisions.

We buy the house we think we should want.

We upgrade our lifestyle because our friends have.

We spend money to look successful rather than spending it on things that genuinely matter to us.

I think the much better question is:

“What does financial success mean to me?”

Maybe it means owning your home.

Maybe it means travelling.

Maybe it means being able to work for a few hours.

Maybe it means supporting your children. 

Maybe it means retiring comfortably.

Maybe it simply means opening your bank account without feeling anxious.

There isn’t one definition of financial freedom or success.

You get to decide what yours looks like.

The Biggest Mistake is Believing You’re Simply “Bad With Money”

If I could change one thing about the way women talk about themselves and money, it would be this..

Stop saying “I’m bad with money.”

You may have financial mistakes. As a financial adviser, I still made my own money mistakes. You may have habits that aren’t serving you. You may avoid your finances or spend more than you want to..

Those are behaviours.

They aren’t your identity.

There is always a story behind the way we behave with money.

Perhaps money was scarce when you were growing up.

Perhaps your parents argued about it.

Perhaps nobody talked about it.

Perhaps you learned that spending money was a way to show love.

Perhaps saving money made you feel safe.

Perhaps you experienced financial insecurity and now find it difficult to spend anything at all.

Understanding your money doesn’t mean blaming your past.

It means becoming curious about it.

When you understand the emotional side of money, you can start changing the practical side too.

You’ve Still Got Time

There’s an enormous amount of pressure around where we’re “supposed” to be financially by a certain age.

By 30, you’re supposed to have your career sorted.

By 40, you’re supposed to have kids, property, investments, savings and a retirement plan.

But real life doesn’t work according to a checklist.

Relationships change. 

Careers change.

Businesses fail and succeed.

Children arrive.

Children grow up.

People separate or divorce.

People start again.

Life throws things that we never planned for.

If you look at your finances today and realise you’re not where you thought you would be, don’t spend your energy wishing you’d started sooner or done things differently.

Redirect your energy. Start now.

You can change your spending and savings habits.

You can learn about investing.

You can start a new career or earn more money.

You can pay down debt.

You can understand your super.

You can build savings.

You can have better conversations about money.

You are the only thing in your way of doing one or all of these things. 

So if you're in your 30s or 40s and thinking, "I should have this figured out by now," take a breath.

You are not behind.

Your financial story is still being written.

The most important thing you can do is decide that you’re going to be part of writing the next chapter.

Start where you are. Learn what you don’t know. Ask the questions you’ve been avoiding. And give your future self the same attention you’ve been giving everyone else.

You don’t need all the answers.

It’s about knowing where you can find them, or getting support from an expert.

Warmest,

Karen Eley is a financial coach with more than 20 years’ experience as a financial adviser. Through her business, Women Talking Finance, she helps women to be confident and knowledgeable about all things finance. Karen translates complex financial concepts into simple digestible ideas.

Learn More (whilst you're there, check out the freebies)

more resources

The Biggest Financial Mistakes Women Make in Their 30s to 40s

Your 30s and 40s are not too late to get your finances on track. From lifestyle inflation and financial avoidance to ignoring super, delaying investing, relying too heavily on a partner, and comparing yourself to others—small financial patterns can have a big impact over time. The good news? You’re not “bad with money,” and you’re not behind. Start by understanding where you are, make informed decisions, and take one step toward the financial future you want.

Read More
When You’ve Been Made to Feel Stupid or Careless With Money

Many women leave controlling relationships with little understanding of their finances, not because they are incapable, but because they were excluded from financial decisions or subjected to financial abuse. Rebuilding financial confidence starts with recognising that this is not a personal failure, gathering important financial information, learning basic money concepts one step at a time, taking small practical actions such as reviewing accounts and tracking expenses, understanding the true cost of living, seeking support from trusted professionals, and replacing self-doubt with empowering beliefs. Financial confidence is built through knowledge, action, and self-compassion, allowing women to regain control of their money, make informed decisions, and confidently create a more secure future.

Read More
Don’t Be Caught Out By This Tax Surcharge

The Medicare Levy Surcharge (MLS) is an additional tax for higher-income Australians who do not have eligible private hospital cover, making private health insurance a worthwhile financial consideration for many. For the 2026–27 financial year, individuals earning over $105,000 and families earning over $210,000 may pay an MLS of 1% to 1.5% of their income, in addition to the standard Medicare levy. While private health cover can sometimes cost less than the surcharge itself, the decision should also consider factors such as policy benefits, excess, Lifetime Health Cover (LHC) loading, and personal healthcare needs. As income increases, private health insurance becomes not only a health decision but also an important tax and cashflow planning consideration.

Read More