Wikimedia Commons, via Wikipedia: KSI (entertainer)
KSI’s net worth is estimated at $100 million, built across a diversified empire spanning YouTube content creation, music, boxing promotion, and co-ownership of consumer brands including Prime Hydration and Lunchly. Born Olajide Olayinka Williams Olatunji, KSI is one of Britain’s highest-earning digital creators and was ranked second on Forbes’ Top Creators 2023 list with estimated annual earnings of $23.9 million.
Updated March 2026: According to Forbes, KSI earned an estimated $23.9 million in the 2023 fiscal year as the second-highest-earning creator globally. Forbes also covered the September 2024 launch of Lunchly, his food venture with Logan Paul and MrBeast. His Prime Hydration co-ownership remains his most valuable asset, though Business Insider reported in June 2025 that UK Prime revenues fell 71% in 2024 amid broader sales declines.
Olajide Olayinka Williams Olatunji was born on June 19, 1993, in London, England, to Nigerian parents of Yoruba heritage. His family relocated to Watford, Hertfordshire, where he was educated at Berkhamsted School, a private institution. His father, Jide Olatunji, worked in finance, and his mother, Yinka Olatunji, is a nurse. Olatunji registered his first YouTube channel, then known as KSIOlajidebt, in 2009 while still in secondary school, initially posting commentary videos on the FIFA video game series. He quickly amassed a following through a combination of gaming commentary, comedic sketches, and candid personality. Upon realizing his YouTube earnings exceeded a teacher’s starting wage, he decided to pursue content creation full-time. He went on to become a founding member of the Sidemen, a seven-person British YouTube collective formed in 2013.
KSI’s career spans multiple intersecting verticals. On YouTube, his three active personal channels – KSI, JJ Olatunji, and KSIClips – collectively hold over 44 million subscribers and have accumulated 14 billion video views as of early 2025. The Sidemen collective operates four additional channels including the flagship Sidemen channel and MoreSidemen. In 2019, The Sunday Times ranked KSI second in its list of most influential online creators in the United Kingdom. He was listed in the Forbes 30 Under 30 Europe 2021 Entertainment category and ranked second overall on the Forbes Top Creators 2023 list.
KSI entered professional boxing in 2018, beginning with an amateur bout against fellow YouTuber Joe Weller, which he won by TKO in the third round. He then fought Logan Paul twice – a draw in August 2018 and a split-decision win in November 2019. He co-founded Misfits Boxing in 2021 as a joint venture with Wasserman Boxing, serving as CEO. The promotion secured a five-year deal with DAZN for two pay-per-view events per year. In 2023, he fought Thomas Oliveira (FaZe Temperrr) and Joe Fournier – winning both by KO – before losing a majority decision to Tommy Fury in October 2023 at Manchester’s AO Arena, an event that The Sun reported had a fight purse valued at approximately $10 million.
As a musician, KSI has released two studio albums: Dissimulation (2020), which debuted at number two on the UK Albums Chart, and All Over the Place (2021), which debuted at number one and was certified platinum by the BPI. Lead singles “Don’t Play” and “Holiday” both debuted at number two on the UK Singles Chart. He received the Brit Billion Award in 2024 for accumulating over one billion streams in the UK. He has also served as a judge on Britain’s Got Talent since 2026.
KSI has kept his romantic relationships largely private. He was raised in Watford by his Nigerian parents and has spoken publicly about his family’s importance to his work ethic. He owns over ten properties across England, valued collectively at over $13 million as of 2020 per his own statements to Men’s Health. He has been candid about losing nearly $8 million in cryptocurrency in 2021, stating he exited crypto investments following those losses. KSI relocated to Los Angeles in 2022 to be closer to the US creator and boxing industry ecosystem. He has spoken openly about his Christian faith and the influence of his Nigerian heritage on his identity.
KSI’s net worth is estimated at $100 million. His wealth comes from YouTube advertising revenue, his 20% stake in Prime Hydration, boxing pay-per-view earnings, music royalties, Misfits Boxing co-ownership, and various brand ventures. Forbes ranked him the second-highest-earning creator globally in 2023, estimating that year’s earnings at $23.9 million.
KSI’s fortune was built incrementally across content creation, boxing, and business. His YouTube channels generate millions in ad revenue annually. His single biggest wealth vehicle is Prime Hydration, the sports drink co-founded with Logan Paul in 2022 that generated $250 million in year-one revenue per Fortune and was valued at over $5.5 billion at peak. His boxing events, particularly the 2018 Logan Paul fights and 2023 Tommy Fury bout, generated eight-figure PPV revenues.
KSI’s last professional bout was in October 2023, when he lost a majority decision to Tommy Fury at Manchester’s AO Arena. As co-founder and CEO of Misfits Boxing, he continues to promote events on DAZN regardless of his personal boxing schedule. A planned fight with Dillon Danis was announced for early 2025 per Boxing Scene but had not materialized as of March 2026.
As of March 2026, KSI is 32 years old. KSI was born on 19 June 1993 in London, England.
KSI stands 5’10.5″ tall (179 cm).
KSI has been in a long-term relationship with his girlfriend for approximately eight years. He has chosen to keep her identity private, rarely discussing his personal life publicly despite his massive online following.
KSI lives in the Orpington area of London, England. He owns multiple properties across the UK with a combined value exceeding £10 million, including a mansion reportedly worth £7–9 million.
KSI earned approximately $24 million in 2023 according to Forbes, making him one of the highest-earning content creators in the world. His energy drink PRIME, co-founded with Logan Paul, has generated massive revenue with a stake valued at over $750 million.