The Times Australia
Business and Money

A seemingly innocent and fun way to justify expenses that can have serious financial consequences

  • Written by Janneke Blijlevens, Senior Lecturer in Marketing, RMIT University
Two women showing each other shirts in a shop

These shoes are perfect, made for me! I have to get them! But really, I should be paying off my car loan instead. I can’t justify this purchase. Or can I …?

We all know this feeling, this tension between what you really want to do and what you really should, or shouldn’t, do. What you are experiencing is cognitive dissonance[1].

It’s a psychological discomfort we feel when our behaviours and our values or beliefs do not match. Not to worry, we can make that discomfort simply disappear with a good dose of #GirlMaths!

So what is #GirlMaths?

GirlMaths recently became a viral phenomenon on TikTok after New Zealand FVHZM radio hosts Fletch, Vaughan and Hayley used #GirlMaths to justify one host’s mother’s expensive dress purchase as basically free because the dress was going to be worn at least four times.

Since then, influencers have added to the #GirlMaths trend with gems such as “If I buy it for $100, wear it, and then resell it for $80 then I basically wore it for free”, “If I pay with cash, it means it’s free”, and “If I just returned something, then purchase something new for the same amount of money, then it’s free”.

The reason #GirlMaths resonates so well with everyone and allows it to go viral is that we are very familiar with this type of thinking. The mental gymnastics of #GirlMaths needed to justify cost-per-wear or cash-is-free is a perfect display of behavioural biases and heuristics, such as confirmation bias and denomination bias, being applied to everyday consumption decisions.

The psychology of decision-making

Behavioural biases and heuristics are shortcuts in our thinking that help us make decisions quicker and easier, and are great for reducing the cognitive dissonance we sometimes experience.

Our brain has a lot of decisions to make in a day and simply doesn’t have the power to scrutinise every little detail of every decision[2]. These shortcuts in our thinking may facilitate the decision making process, but they don’t always mean we make the most optimal decisions.

Confirmation bias is a bias where you justify your decisions by considering only the evidence that supports what you want and ignore the evidence that would mean you’d have to make a different decision. Cost-per-wear does sound quite financially savvy. It is just like bulk-buying pantry essentials, right?

The issue is you are ignoring the facts such as: 1) your disposable income does not match this expense in light of your utility bills, 2) you could rewear a cheaper dress all the same, and 3) by spending money on a fancy dress, you lose the opportunity to spend the money on other better investments for wealth accumulation, or to pay off your car loan.

The financial and social costs

But it’s all a bit of innocent fun, right? Surely people won’t take #GirlMaths that seriously? We beg to differ.

First, the term is unnecessarily gendered. Gendered language operates to reinforce societal expectations with a particular gender and can promote stereotypes, biases and binary categories.

In this case, the term “girl maths” reinforces problematic stereotypes that equate women with consumption, frivolity and extravagant spending. When stereotypes are reinforced within our own social circles, we are more likely to internalise these as part of our identity[3].

Two women showing each other shirts in a shop
The term ‘girl maths’ reinforces the idea that women are frivolous with money. Shutterstock[4]

By representing women in a less favourable way, the term operates to both demean and discriminate on a gendered basis. This is heightened by the use of “girl” as opposed to “woman”, which implies someone is childlike or lacking in knowledge or experience. It also begs the question what “boy maths” - set up as something opposing and different - might connote.

Second, the #GirlMaths trend reminds us of the power of “finfluencers[5]” – social media content creators amassing huge online followings by sharing advice on anything from budgeting to buying a house, to investing.

These online gurus appeal to Gen Z and millennials, simplifying complex financial concepts into digestible nuggets, much like #GirlMaths simplifies purchases based on cost-per-wear or cash-as-free.

Read more: Are you financially literate? Here are 7 signs you're on the right track[6]

Just as regulators such as ASIC[7] repeatedly warn us of the dangers of buy-now-pay-later services, we must caution the #GirlMaths trend as a dangerous cocktail for young women who are susceptible to the “advice” of finfluencers.

The trend resembles BNPL by breaking down expenses into smaller, more palatable portions, making purchases seem justifiable and affordable at the moment.

Denomination bias describes this tendency to spend more money when it is denominated in small amounts rather than large amounts. We find it much easier to spend $50 four times than $200 all at once.

However, the convenience of these shortcuts in our thinking can obscure the hidden financial risks. You may overlook the bigger picture of your financial health, and spend more than what you can afford. That’s why a large number of BNPL users find themselves ending up in a modern debt trap[8].

The perils of #GirlMaths

The danger of #GirlMaths to young women lies in the cocktail of feeling oddly familiar and reinforced in this biased thinking, the problematic stereotypes that shape identities, and the the power of finfluencers, who wield increasing influence over the financial choices and decision-making of young women.

While the term may initially come across as innocent fun, it’s crucial not to underestimate its potential harms. Instead, let’s champion the use of inclusive language in finance that doesn’t perpetuate gender biases.

And if you’re a staunch supporter of #GirlMaths, we strongly urge you to take into account the possible adverse financial consequences of these quick-fix spending habits.

References

  1. ^ cognitive dissonance (www.britannica.com)
  2. ^ decision (theconversation.com)
  3. ^ internalise these as part of our identity (journals.sagepub.com)
  4. ^ Shutterstock (www.shutterstock.com)
  5. ^ finfluencers (theconversation.com)
  6. ^ Are you financially literate? Here are 7 signs you're on the right track (theconversation.com)
  7. ^ ASIC (moneysmart.gov.au)
  8. ^ modern debt trap (www.choice.com.au)

Authors: Janneke Blijlevens, Senior Lecturer in Marketing, RMIT University

Read more https://theconversation.com/girlmaths-a-seemingly-innocent-and-fun-way-to-justify-expenses-that-can-have-serious-financial-consequences-211903

Business Times

Agentforce for Financial Services: Merging AI and Human Expertise…

In this rapidly evolving world of financial services, deploying customer experiences that are personalized and intelligen...

Samsara Eco and lululemon announce 10 year partnership

lululemon and Samsara Eco Announce 10-Year Plan to Advance Recycled Material Portfolio Plan will see lululemon source a...

Barelli Bathrooms announces celebrity interior designer Kellie Ri…

Barelli Bathrooms, a leading name in contemporary bathroom accessories and design, is proud to announce its new national ...

The Times Features

The Role of Your GP in Creating a Chronic Disease Management Plan That Works

Living with a long-term condition, whether that is diabetes, asthma, arthritis or heart disease, means making hundreds of small decisions every day. You plan your diet against m...

Troubleshooting Flickering Lights: A Comprehensive Guide for Homeowners

Image by rawpixel.com on Freepik Effectively addressing flickering lights in your home is more than just a matter of convenience; it's a pivotal aspect of both home safety and en...

My shins hurt after running. Could it be shin splints?

If you’ve started running for the first time, started again after a break, or your workout is more intense, you might have felt it. A dull, nagging ache down your shins after...

Metal Roof Replacement Cost Per Square Metre in 2025: A Comprehensive Guide for Australian Homeowners

In recent years, the trend of installing metal roofs has surged across Australia. With their reputation for being both robust and visually appealing, it's easy to understand thei...

Why You’re Always Adjusting Your Bra — and What to Do Instead

Image by freepik It starts with a gentle tug, then a subtle shift, and before you know it, you're adjusting your bra again — in the middle of work, at dinner, even on the couch. I...

How to Tell If Your Eyes Are Working Harder Than They Should Be

Image by freepik Most of us take our vision for granted—until it starts to let us down. Whether it's squinting at your phone, rubbing your eyes at the end of the day, or feeling ...