Side hustle culture promised freedom and delivered burnout for many. Here’s why it’s happening and what smarter approaches to earning extra income look like.
The Rise of the Side Hustle
It began, roughly, with the financial crisis of 2008. As traditional employment became less secure, wages stagnated, and the gig economy expanded to fill the space left by declining full-time jobs, a cultural narrative emerged to make sense of it all. It told a story of entrepreneurial freedom, of people escaping the nine-to-five to build multiple income streams, follow their passions, and achieve financial independence on their own terms. This narrative found fertile ground in social media, which provided both the platform for building audiences and the aspirational imagery of people working from laptops on beaches.
The side hustle, any paid work done alongside a primary job, became, in the mid-2010s, the defining aspiration of a generation. A 2023 survey by HMRC estimated that around 4.4 million people in the UK were generating income from a secondary source alongside their main employment. In the US, the figure is higher still, with some surveys suggesting that as many as one in three working adults have some form of supplementary income. The side hustle had become, in the cultural imagination, less an option than an expectation.
4.4m UK adults generating income from a secondary source alongside their main job (HMRC, 2023)
The Promise and the Reality
For some people, side hustles have been transformative. The growth of platforms enabling creative work (Etsy, Substack, YouTube, OnlyFans, Airbnb) has genuinely created income opportunities that did not exist a generation ago. Skilled professionals who can offer consulting, coaching, or freelance services command significant rates. And for those with the right skills, timing, and audience, building a side income into a primary one is not merely aspiration but documented reality.
But the gap between the aspirational narrative and the lived reality of most side hustlers is significant and growing harder to ignore. Research by Henley Business School found that while around a third of UK workers have a side hustle, the median income generated is modest, often under £500 per month, and does not reflect the time, energy, and associated costs invested. Many side hustlers operate at a loss once business costs, tax liabilities, and the value of time spent are properly accounted for.
Meanwhile, the wellbeing data is troubling. A 2024 study by the Mental Health Foundation found that side hustlers were significantly more likely to report burnout, anxiety, and sleep problems than their non-side-hustling counterparts, even after controlling for income and working hours. The dream of the empowered, energised multi-income earner bumps up against the reality of someone working evenings and weekends while also managing a full-time job, family obligations, and the relentless pressure of building something from scratch.
“The median side hustle income in the UK is under £500 per month, often not reflecting the time, energy, and costs invested. The maths rarely adds up.”
The Hustle Culture Trap
Hustle culture (the broader ideology that valorises productivity, relentlessness, and the subordination of rest, relationships, and leisure to economic output) has attracted significant and well-founded criticism in recent years. The ‘sleep when you’re dead’ school of thought has been challenged by sleep scientists, psychologists, and occupational health researchers who point out that chronic overwork is not a route to achievement but to cognitive decline, physical illness, and burnout.
The cultural critic Anne Helen Petersen, whose viral essay ‘How Millennials Became the Burnout Generation’ became one of the most widely shared pieces of writing of the 2010s, identified a generation that had been raised to treat constant productivity as a form of moral worth, and that was paying a steep psychological price for internalising that belief. The side hustle is, in this analysis, not so much an economic opportunity as a symptom of a society that has failed to provide adequate economic security through primary employment, leaving workers to scramble for supplementary income in their ‘spare’ time while blaming themselves for finding the scramble exhausting.
Who Benefits, And Who Pays
The side hustle economy is not neutral. It benefits, disproportionately, those who come to it with existing advantages: skills that command market rates, capital to invest in equipment or inventory, time that is not already fully committed to care responsibilities, and social networks through which to find clients or customers. Those who are already overextended (single parents, those with caring responsibilities, those in physically demanding primary jobs) are least positioned to benefit from secondary employment and most likely to pay the health and relationship costs of attempting it.
There is a particular irony in the gendering of hustle culture. The platforms most associated with women’s side hustles (direct selling, Etsy, tutoring, social media content creation) tend to be those with the lowest average returns and the highest reliance on unpaid relationship labour. Women are more likely than men to have primary responsibility for household and childcare tasks that limit the time available for a side hustle. And yet they are, surveys consistently show, more likely than men to report feeling guilty about not having one.
37% of side hustlers who report burnout symptoms, compared to 22% of non-side-hustlers (Mental Health Foundation, 2024)
The Smarter Questions
The alternative to hustle culture is not, as its proponents sometimes imply, simple laziness. It is strategic thinking about what your time is worth and where the highest returns, financial and otherwise, genuinely lie. Before embarking on a side hustle, the most useful exercise is an honest reckoning with the full costs involved: not just the money needed for materials, software, or a website, but the time costs, the energy costs, and the opportunity costs of what you will not be doing with the hours and mental space you allocate.
For many people, the calculation that emerges from this reckoning points somewhere other than a side hustle. It might point toward negotiating a pay rise in a primary job, which requires none of the risk or overheads of self-employment. It might point toward retraining or skill development that increases earning potential over time. It might point toward optimising existing finances (maximising pension contributions, reducing interest payments, or investing in tax-efficient savings vehicles) which can have a financial impact comparable to a part-time income without any of the time cost.
“For many people, negotiating a pay rise in their primary job, or optimising existing finances, will have more impact than a side hustle, with a fraction of the time cost.”
When Side Hustles Do Make Sense
This is not an argument against side hustles per se. For people in specific circumstances (those who have a genuine skill gap between their current earnings and their market value, those who have creative or entrepreneurial ambitions that cannot be pursued within employment, those who are building a business they intend to transition to full-time) a side hustle can be a rational and rewarding investment of time and energy.
The conditions under which side hustles tend to work well include: a clear income target and timeline, defined working hours that do not erode rest or relationships, a skill or product that commands a meaningful rate, genuine enjoyment of the work rather than purely instrumental motivation, and realistic expectations about the timescale to profitability. They tend to work poorly when they are driven primarily by financial anxiety, undertaken on top of an already unsustainable workload, or pursued because the cultural pressure to have one feels impossible to resist.
The Permission You Didn’t Know You Needed
There is something worth saying explicitly in the conclusion of an article about side hustles: you do not need one. The message of hustle culture, that the path to financial security runs through maximum productive output in every available hour, is not supported by the evidence on what actually builds long-term financial wellbeing. Rest, recovery, relationship maintenance, and the sustainable management of your primary career are not luxuries that compete with financial progress; they are conditions of it.
The generation that has been told, simultaneously, that they must hustle harder and that they are failing if they feel burned out by the attempt deserves a more honest conversation about what financial progress actually requires. It requires not the relentless extraction of commercial value from every hour of the day, but the thoughtful, sustainable allocation of time, energy, and resources toward goals that genuinely matter.
Smarter choices do not always look as compelling as an Instagram reel of someone living their laptop-on-a-beach best life. They often look like going to bed on time, saying no to a project that isn’t worth it, and spending Sunday morning with your children instead of updating your Etsy listings. The data suggests those choices are, on the available evidence, the ones that tend to work out better in the long run.