When spending logic goes viral with a wink, who’s laughing, and who’s left paying the bill? We examine the cultural phenomenon that’s both entertaining and troubling in equal measure.
What Is Girl Math?
If you have spent any time on TikTok in the past two years, you will almost certainly have encountered ‘girl math’. The format is simple: a creator explains, with comic exaggeration, the internal financial logic that justifies a purchase. Returning an item pays for a new one. A concert ticket bought months ago was essentially free by the time the event arrives. Spending £50 on a coffee machine means all subsequent coffees are free. Splitting a bill means your portion was cheaper than the menu price.
The joke, and it is intended as a joke, is that these justifications are transparently absurd; that the reasoning deployed is technically coherent but obviously wrong. The humour derives from recognition: yes, we have all done some version of this. We have all made purchases and then constructed the post-hoc logic that made them seem reasonable. Girl math names that very human tendency and turns it into content.
“The humour derives from recognition; we have all made purchases and then constructed the post-hoc logic that made them seem reasonable. Girl math names that tendency.”
The Case for Harmlessness
The most straightforward defence of girl math is that it is simply comedy, and the instinct to pathologise women’s humour, particularly humour about money, reflects exactly the kind of patronising anxiety it supposedly exposes. Women have long been subject to cultural surveillance of their spending choices in ways that men simply are not. The image of the frivolous female spendthrift is ancient and persistent: the woman who cannot resist handbags and shoes, who blows her pay cheque on things she doesn’t need, who is constitutionally unsuited to financial seriousness.
Girl math, on this reading, is a form of self-aware reclamation. It uses exaggeration to expose the absurdity of the value judgements women face around spending, the way that a woman buying designer shoes is coded as irresponsible while a man buying an expensive watch is coded as successful. The creators who produce this content are, overwhelmingly, performing knowingness. They are not actually advising their audience to return items as a savings strategy; they are laughing at themselves, and inviting their audience to laugh with them.
There is also something to be said for the financial realism embedded in some girl math logic. The sunk cost, money already spent that cannot be recovered, is a real concept in economics, and the insight that a concert ticket paid for months ago should not be counted against today’s budget is, technically, not wrong. The person who stays home because they feel guilty about money they have already spent is making a worse financial decision than the person who goes.
The Case for Concern
The critique of girl math is more nuanced than a simple accusation of misogyny, and it deserves to be heard. The concern is not that women who make girl math content are genuinely innumerate or financially reckless. It is that the trend (precisely because it is so shareable, so relatable, and so funny) reinforces a cultural narrative that frames women’s relationship with money as fundamentally irrational.
When a trend becomes ubiquitous, it shapes perception beyond its individual instances. The cumulative effect of thousands of videos in which women perform illogical financial reasoning, even ironically, is a cultural text that can be read straight. Financial services companies, employers, and (crucially) the men who control a great deal of financial decision-making in society do not always receive cultural signals with the irony intact. The joke can become the stereotype without the punchline.
Dr. Carly Moulton, a researcher in gender and consumer culture at the University of Manchester, puts it plainly: “Irony is a sophisticated communication tool that requires the audience to already share the speaker’s perspective. When that content is algorithmic and distributed at scale, you cannot guarantee that the irony travels. What travels is the image of women making absurd financial decisions and finding it amusing.”
70% of TikTok users who engage with personal finance content are aged 18–34 (TikTok internal data, 2023)
The Gendering of Financial Irrationality
It is worth noting what does not go viral in the same way. There is no ‘boy math’ trend of comparable reach that similarly frames men’s financial reasoning as entertainingly illogical; despite the fact that men are statistically more likely to engage in financially damaging behaviour like overtrading in investment markets, taking excessive financial risks, and underinsuring against catastrophic loss. The irrationalities that make it into popular culture are, as ever, the ones attributed to women.
This asymmetry matters because the financial penalty for being perceived as financially incompetent is real. Women already face structural barriers in financial life: lower average earnings, pension gaps, underrepresentation in investment, and a financial services industry that has historically done a poor job of marketing to them. A cultural narrative that frames women’s financial reasoning as inherently comic is not a neutral backdrop against which these structural issues play out.
“Men are statistically more likely to overtrade, take excessive risk, and underinsure. The irrationalities that make it into popular culture are, as ever, the ones attributed to women.”
What It Tells Us About Financial Shame
Perhaps the most interesting thing about girl math is what it reveals about the emotional experience of spending. The genre would not resonate so widely if it did not touch something real: the guilt, the rationalisation, and the complicated feelings that many people (particularly women, who are subject to greater cultural scrutiny of their spending) experience around financial decisions.
Financial shame is a significant and under-discussed barrier to financial health. People who feel ashamed of their spending or their debt are less likely to seek advice, less likely to talk openly about their finances, and less likely to make the changes that would actually improve their situation. To the extent that girl math normalises the experience of feeling conflicted about spending, and offers a laugh rather than a lecture, it may, paradoxically, create some psychological space for more honest financial self-reflection.
The best financial education does not shame people for the spending decisions they have made. It creates safety for honest conversation about what money means, what we use it for, and how we can make choices that better reflect our actual values. Girl math occupies a complicated position in that project: simultaneously naming a real human tendency and potentially hardening a cultural stereotype that works against women’s financial empowerment.
The Verdict
Girl math is neither purely harmless nor straightforwardly damaging. It is a cultural phenomenon that reflects real anxieties about spending and financial identity, deployed with varying degrees of self-awareness by creators who are, for the most part, genuinely witty and perceptive. Whether its net effect is positive or negative probably depends on how it is received, and that, in the age of algorithmic content distribution, is not something any individual creator controls.
What is worth insisting on is that the solution to financial stereotyping is not for women to be more earnest about money, to prove their financial seriousness by never making a joke. It is for the culture at large to develop a richer, more varied picture of women’s financial lives that includes both the comedy and the competence, the anxieties and the achievements. Women are, the data consistently shows, more than capable of managing money well. The culture just needs to start saying so a bit more loudly.