Sia Kate Isobelle Furler was born on December 18, 1975, in Adelaide, South Australia, to a musician father and an art-lecturer mother. She grew up around music and began performing on Adelaide’s acid-jazz circuit as a teenager, joining the jazz-funk band Crisp at 17. Crisp released two albums, Word and the Deal (1996) and Delerium (1997), before splitting, and Sia self-released a solo album, OnlySee, that reportedly sold around 1,200 copies. When a solo career failed to take off in Adelaide, she left for London in 1997 to try again.

In London, Sia worked as a backing vocalist for Jamiroquai and signed a solo deal with DancePool, a Sony sublabel, while also drawing collaboration offers from Zero 7 and William Orbit. Her early solo albums, including Healing Is Difficult (2001) and Colour the Small One (2004) — home to the ballad “Breathe Me,” later used to close the HBO series Six Feet Under — built a cult following without mainstream success. By 2010, after years of moderate success, alcohol and prescription-drug use, and what she has described as one of her lowest points, Sia says she considered ending her life; a phone call from a friend, and a 12-step program she joined the next day, became a turning point. She largely stepped back from performing for several years afterward and leaned into songwriting for other artists instead, a shift that produced global hits including Rihanna’s “Diamonds” and David Guetta’s “Titanium” before she returned to the spotlight herself with 1000 Forms of Fear (2014) and its lead single, “Chandelier.”

“Chandelier” reached number eight on the Billboard Hot 100 and earned two Grammy nominations, for Record of the Year and Song of the Year, at the 2015 ceremony — part of nine career Grammy nominations to date, none of which have converted into a win. Rather than appear as herself in the “Chandelier” video and subsequent performances, Sia began covering her face with oversized wigs and turning away from the camera or audience, a choice she has attributed to stage fright and a wish to keep public attention on the music rather than her appearance; she has spoken about crying backstage before high-profile performances even after becoming one of pop’s biggest names, per Refinery29’s reporting on her stage fright. Her 2016 album This Is Acting was built explicitly around songs she had originally written for other artists — including Adele, Rihanna, Beyonce, Katy Perry and Demi Lovato — that went unused or were passed over, a concept Rolling Stone profiled at length; the album’s “Cheap Thrills,” with Sean Paul, became her first Hot 100 number one. She has since released Everyday Is Christmas (2017), a holiday album made with fellow songwriter Greg Kurstin, and Reasonable Woman (2024), which featured Kylie Minogue, Chaka Khan and Paris Hilton, among others, according to Forbes’ coverage of the album’s rollout. In 2021 she wrote, scored and made her feature directing debut with Music, starring Kate Hudson, Leslie Odom Jr. and her longtime collaborator Maddie Ziegler; the film drew heavy criticism from disability advocates over its portrayal of a nonverbal autistic character, and Sia added a content warning and publicly apologized, per Variety’s reporting at the time. Two years later she disclosed that she is on the autism spectrum herself.

No regulatory filing or audited statement discloses Sia’s personal annual income, and because she rarely tours, her earnings are harder to estimate year-to-year than those of artists who play arenas regularly. Her only headline arena run to date, the Nostalgic for the Present Tour, played North America, Oceania and Asia across 2016 and 2017; individual Billboard Boxscore reports from that run, including a sellout at Brooklyn’s Barclays Center, showed single-night grosses over $1 million, but no comprehensively audited total tour gross has been published in primary reporting that this profile could independently verify, so any full-tour figure should be treated as an approximation rather than a confirmed number. Outside of touring, her income in a given year likely depends heavily on how many songs she has placed with other artists, sync licensing for film and television, and streaming royalties on her own catalog — none of which are publicly broken out by year.

Songwriting for other artists is Sia’s most distinctive and, by reputation, most lucrative income stream. She wrote or co-wrote Rihanna’s “Diamonds,” which the RIAA certified Diamond in April 2024 for more than 10 million equivalent units in the US alone, as well as David Guetta’s “Titanium” (RIAA Double Platinum) and Beyonce’s “Pretty Hurts.” Her own singles have performed comparably: “Chandelier” was certified Diamond by the RIAA in 2024, and “Cheap Thrills,” featuring Sean Paul, followed it to Diamond-equivalent status, reaching 11x Platinum in January 2026, per Billboard’s certification reporting. In Australia, her home market’s performing-rights body, APRA, named her Songwriter of the Year for three consecutive years, 2013 through 2015, an unprecedented run at the time; Billboard covered the milestone. She records and releases music through Monkey Puzzle, her own imprint, which struck a worldwide distribution agreement with Warner’s Atlantic Records in 2017; Music Business Worldwide reported that all her subsequent albums, from the Kurstin Christmas record onward, have gone out through that Monkey Puzzle/Atlantic partnership. None of this discloses exact royalty rates, publishing splits, or co-writer shares, so the scale of her personal take from any individual song is not independently verifiable.

No major, well-documented brand endorsement or paid ambassador campaign for Sia turned up in trade or entertainment press. Her deliberately face-obscured public image, similar in spirit to the anonymity strategies of acts like Claptone, likely makes her a less conventional fit for the kind of face-forward fashion or beauty campaigns other pop stars take on. It is possible smaller or regional partnerships exist that have not been reported in searchable English-language press, but none should be assumed here.

Sia’s clearest documented business interest is Monkey Puzzle, the London-based recording label and imprint she owns and through which she has released music since at least 1000 Forms of Fear, licensing it to larger partners — Sony, then from 2017 onward Atlantic — for global distribution, per Music Business Worldwide’s reporting on the Atlantic deal. Beyond that imprint and her film work as a writer-director, no other company, restaurant, technology investment, or outside business founded or majority-owned by Sia is documented in credible reporting, so none is claimed here.

Sia has been reported to own a roughly 1.3-acre property in Toluca Lake, Los Angeles, purchased in 2015 and including a guesthouse she converted into a recording studio; Hello! magazine reported the details, sourced from comments Sia herself made in a radio interview, though the outlet notes it is not fully confirmed whether this remains her primary residence following her 2025 divorce filing. She has also been reported to have briefly owned and quickly resold at least one other Los Angeles-area property earlier in her career. Hello! magazine’s report also cited an approximate $5.15 million property value for the Toluca Lake home; this figure is reported, not independently verified against a public sale or assessment record, and is included here for context rather than as a confirmed price. No comprehensive, independently verified list of her real estate holdings exists in public records searchable for this profile, so only the property with direct sourcing is included here.