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Composing has been at the heart of Australian songwriter Rachel Koster since her early teens. A solo writer and a seasoned co-writer, collaborations to date include work with Stuart Fraser (Noiseworks), Gary Pinto (CDB), Stephen Cummings (The Sports), Alan Caswell, Michael Barker (John Butler Trio), Sean O’Boyle OAM, Chris Haigh (Troy Cassar-Daley), Bruce Haymes (Paul Kelly’s Professor Ratbaggy), award winning blues artist Lil’Fi, Australian Idol finalists and countless others.

Debuting in the music scene with the independent pop track ‘December’ Rachel garnered interest from ABC radio, following up with her highly acclaimed pop & jazz album ‘Deciduous’, produced by ARIA award winning engineer, Robin Mai, and producer Chris Dickie (Wet Wet Wet/The Eurythmics). The album was summed up as ‘a smooth and cosy offering, canvassing seasons of the heart’.

She subsequently reached #21 on the JJJ Unearthed charts with quirky alt pop single ‘The Mess’, followed by 2017’s dreamy acoustic duet ‘Carnival’ alongside indie artist & co-writer Blake Gannon. The EP B-side ‘I Got You’ was penned with long term writing partner, the late Stuart ‘Chet’ Fraser, who Koster collaborated with for 15 years. 2021 saw the release of her single ‘Table’, and next a tunes-from-the-shelf throwback double b-side ‘Breathe’ & ‘Balancing’, both 2010 pop collabs with Pseudo Echo’s Leigh Brothers.

Writing genres continue to be diverse as her work covers EDM to country, and pop to acoustic. In the past she has penned children’s music as well as jingles, theme songs & awareness campaigns. Passionately co-writing with numerous acts both in Australia & abroad on a regular basis, Rachel creates alongside artists at varying stages of their career, both cowriting, toplining or providing complete pieces. Australian acts who have used or considered her material include Vanessa Amorosi, Darren Coggan, Vika & Linda Bull, Nyree Huyser & Kylie Moss.

Rachel became part of a writing team for the full scale musical ‘The End of the Day’ in 2022. She joins a handful of highly celebrated musicians on the developing work, namely; Sean O’Boyle OAM, Alexander King, Karen Jacobson, & Ian McKenzie-Thurley.

In 2020, she founded and ran the state-wide online songwriting residency Songwalk, and has since continued delivering dynamic live masterclasses of Songwalk throughout Queensland, alongside fellow musicians Boi Crompton & Eskae Van Eck.

Her joyful pop project Scraffito ignited in 2025, an intentionally mysterious 80s influenced collaboration which will feature an array of guests. Scraffito’s first release is close at hand, and by all accounts it will be a colourful and sonic celebration.

With a swag of solo releases and projects in the pipeline, and more co-writes than ever, there is much under wraps but brewing furiously. Delivering life in the form of song is Rachel’s why. She believes creativity can be a force for good in the world. Stand by to bask in some audio sunshine.

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Carnival EP