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Brits are actively searching for new ways to earn extra money, with the most popular ideas seeing tens of thousands of annual Google searches.
That’s according to new analysis from the team at money.co.uk business savings accounts, which has revealed that second-hand marketplace Vinted is the number one side hustle for Brits seeking to supplement their income, with 84,800 UK searches from October 2024 to September 2025.
Retail and e-commerce dominate as the most popular type of side hustle, with more than 280,000 Brits searching for shopping related gigs in the last year.
The interest aligns with the broader popularity of the second-hand retail market in the UK, which is worth more than £7 billion as of 2025.
The second most popular side hustle (covering the same period) is ‘mystery shopping jobs’, which attracted 73,700 UK Google searches.
Mystery shopping allows people to earn extra income by reviewing everyday services, from retail stores and restaurants to banks and travel providers. For businesses, it provides valuable insights into customer experiences, helping to pinpoint training needs or operational improvements.
It is particularly appealing for those seeking flexible, task-based work that fits around other commitments. Assignments are often short, require no specialist equipment, and are accessible to a wide range of people.
Selling on Etsy came in at number three, with 72,500 searches. While Vinted caters mainly to second-hand sellers, Etsy attracts those creating their own products like handmade jewellery, digital prints and stationery.
After Etsy came TikTok content creation (60,700 UK searches) at four, a YouTube channel (46,700) at five, market research (37,470) at six, selling on eBay (31,500) at seven and then dropshipping (18,800), dog walking (15,300) and cleaning (13,500).
Further study insight revealed that the number of Brits researching selling on Vinted, eBay, and Etsy has also increased in the last year, up 18.8%, 13.3% and 11.5% respectively.
According to Royal Mail’s Side Hustle Economy research, side hustlers are earning over £5,000 a year, with more than half (54%) selling on online marketplaces.
However, many people who are turning to side hustles are often not aware of the tax implications should their dealings prove fruitful.
Money.co.uk business savings accounts expert, Joe Phelan, said: “Many people start a side hustle to supplement their income, whether it’s selling online, offering a service, or turning a hobby into extra earnings.
“However, as your income grows, it’s worth keeping a few simple steps front of mind to stay on top of your finances and meet legal tax requirements.
“In the UK, you can earn up to £1,000 a year from self-employment before you need to register as a sole trader or pay tax. If your income goes beyond that, you’ll need to declare it to HMRC, so keeping clear records from the outset can save time later.
“Setting aside a portion of your earnings throughout the year is often the simplest way to stay on top of any future tax payments. A business savings account can help by keeping the money you’ll need separate from day to day spending.
“It’s also a useful way to build good financial habits early, giving you a clear view of what’s available to reinvest and what should be kept aside for tax or business costs.
“Whether your side hustle remains a small project or grows into something bigger, treating it like a business from day one helps make sure you’re prepared for the responsibilities that come with your success.”
Image credit: Depop
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