This article is about how claims are made and measured. It is not financial advice and does not suggest that any activity will produce income.
Why the stories feel so common
Search or scroll through almost any platform and side hustles are everywhere: the person who turned a hobby into a second income, the weekend project that grew into a business, the list of ideas for earning extra money. The sheer volume gives an impression that nearly everyone is doing something on the side, and that most of it works.
That impression is produced partly by how online content is made and shared. Looking at why these stories are overrepresented is the first step to reading them sensibly.
Why success stories dominate
People post what is worth posting. An account of steady, modest, sometimes tedious extra work attracts less attention than a dramatic one. The stories that get shared are those with a clear hook: a surprising earning, a quick start, a neat transformation.
Those who stop are rarely heard from. Someone whose project fizzled out or who found it not worth the effort seldom writes about it. This is the standard shape of survivorship bias: the visible cases are the ones that continued or succeeded.
Some storytellers have a reason to tell. Advice content, courses, tools, marketplaces and affiliate links can all be commercially connected to the idea that side income is accessible and rewarding. This does not make every account false, but it means the sample of loud voices is not neutral. The wider creator economy depends partly on content that promotes opportunity.
Platforms reward engagement. Posts that generate reactions tend to be shown more widely. Recommendation algorithms and engagement metrics tend to lift emotionally striking or aspirational content, whatever its typicality.
Numbers are rarely audited. Claims about income are typically self-reported, unverified, and may not specify whether they refer to revenue or profit after costs and time. A figure that looks impressive may represent very different outcomes once expenses and hours are counted.
What counts as a side hustle?
There is no fixed definition, and that alone changes the answer to “how many people have one.” Depending on the author, the term might cover:
- A formal second job with another employer.
- Self-employment alongside a main job.
- Occasional selling of used items.
- Freelance or platform tasks.
- A hobby business that earns little.
- Investment income or renting out a room.
Some definitions require regular activity, others include one-off sales. Some count only money earned, others include unpaid attempts. Counts differ greatly depending on which of these are included, an issue that parallels the definitional problems discussed for the gig economy.
How participation is actually studied
Researchers use several approaches, each imperfect.
Official labour surveys. Household surveys ask about the main job and sometimes about additional jobs. These can estimate multiple job holding, but they might miss informal or irregular activity that respondents do not think of as a job.
Tax and administrative records. Records can show reported self-employment income or additional income sources. They capture what is declared, and people with small or irregular earnings might not appear, or might not report.
Dedicated surveys on income and activity. Some surveys ask directly about earning extra money outside the main job. The results depend on the wording: asking “do you have a side hustle?” invokes a cultural label that some people embrace and others reject, while asking “in the past month, did you earn money from anything outside your main work?” is more concrete. Question wording can change responses substantially.
Online and opt-in polls. Quick polls published by businesses and media are cheap and widely shared. Because respondents choose themselves, they may be more interested in the topic. As with other opt-in polls, they do not necessarily represent the wider population.
Platform and transaction data. A marketplace can say how many of its sellers earned money in a period, which is real information about that platform. It leaves out everyone who used other channels or none, and it counts accounts rather than people. Transaction records are useful for what they cover, but not for the whole.
Common difficulties in interpreting results
- Recall and reporting. People may forget small amounts or round figures, and may emphasise activity they feel good about. Self-reports of behaviour are known to be imperfect.
- Change over time. A rise in reported side activity may reflect new wording, new platforms that make the activity easier to record, or a shift in what people are willing to call a side hustle.
- Reasons differ. People pursue extra income for very different reasons, such as needing more money, enjoying a hobby, or building skills. Combining them into one trend can hide the fact that these are separate stories, and it matters for how to interpret motives, which surveys capture only roughly.
- Different circumstances. The experience of someone with spare time and savings is not that of someone covering rising costs, yet both can appear under the same label.
Putting the stories in context
Side income is real and common in various forms, and many people value it. The more careful point is that online stories are a poor guide to how common it is, how much it typically yields, or how many attempts continue. Measured evidence tends to be less glamorous, more varied and more dependent on definitions.
A few questions help when meeting a claim:
- How is “side hustle” defined here?
- Is the figure revenue, profit or something else, and over what time?
- Who is telling the story, and do they gain from telling it?
- Is the source an unbiased sample or a self-selected audience?
- What would the people who stopped say?
Keeping these in mind lets the stories stay interesting without being mistaken for statistics.