Tunas Muda School was first established in 1994 under the name OSSC (One Stop Study Centre). The institution primarily offered English course around Kedoya area in West Jakarta, with students ranging from Toddlers to KB.

The first primary level class was opened in 1999 with 6 students. At this point, the school offered a full primary level lesson to the students, with emphasis on the English language.

In 2000, the school moved to a larger campus in Kedoya and expanded classes up to Year 3. The OSSC name was changed officially to Tunas Muda School (Sekolah Tunas Muda).

In 2003, Tunas Muda School became a registered International Baccalaureate school by officially adopting the Primary Years Programme. Classes are offered up to Year 8, with our most senior cohort comprising of 4 students.

The Meruya Campus was officially opened in 2005, with classes offered from Toddlers up to Year 10. Starting from that year, the Kedoya Campus was dedicated for students up to Year 6 only.

Tunas Muda School celebrated the first graduating class in 2008, with 24 students completing either the IB Diploma Programme or the Global Assessment Certificate (GAC).

The first Tunas Muda School Cup was held in 2010 with the theme "Metamorphosis". Competitions were held in Basketball, Soccer, Band, Design, and many others alongside neighboring schools.

In 2012, Tunas Muda School became a Catholic school, where students below Year 1 at that time were taught only the Catholic faith in religion class. Every class below that cohort have had Catholic teachings ever since.

In 2015, Tunas Muda School completed the development of the school chapels, both in Kedoya and Meruya. These chapels support TMS' commitment to become a leading Catholic world school.

In 2024, Tunas Muda School extended the Meruya Campus to accommodate students in different programme levels. The extension includes an Early Years area and a Primary Years building.

Today, Tunas Muda School has grown into an institution which nurtures more than 1,200 students, offering a complete continuum of IB Programmes. Alumni are spread around the world, studying, working, and starting families, enlarging the TMS family.