You will need to declare your net trade income (NTI) from both self-employment (non-platform work) and platform work to the
Inland Revenue Authority of Singapore (IRAS). The Notice of Assessment (NOA) issued by IRAS will inform you of the assessable NTI from both self-employment and platform work, as you need to pay income tax on both sources of income.
For work year 2025 onwards, your self-employed MediSave contributions are computed on the NTI after excluding net earnings from platform work as declared to CPF Board by your platform operator(s). This is because CPF contributions on your net earnings from platform work are payable by your platform operator(s). The notice of CPF contributions for self-employed persons will inform you of your mandatory MediSave contributions for your other income earned as a self-employed person.
