Tan turned professional in January 2024 after she earned her card for the
Ladies European Tour (LET) by finishing tied 8th at Q-School, the first Singaporean to earn an LET card. In January, she was runner-up at the
Webex Players Series Murray River, two strokes behind
Kazuma Kobori in her professional debut. In February, she won the
Magical Kenya Ladies Open in her LET debut. By April, she had climbed into the top-200 on the
Women's World Golf Rankings for the first time, and a year later into the top-100, after runner-up finishes at the 2024
Hero Women's Indian Open and 2025
Jabra Ladies Open, and 3rd place finishes at the 2024
Ladies Italian Open and 2025
Lalla Meryem Cup. Tan captured her second LET title after winning the
Amundi German Masters by a single stroke ahead of
Helen Briem in June 2025. After also winning the
Hero Women's Indian Open in October, she led the final
2025 Ladies European Tour Order of Merit ranking, becoming the first player from Singapore to do so. ==Amateur wins==