{"country":"sg","currency":"SGD","name":"Singapore","taxYear":2025,"taxYearPeriod":"January - December 2025","description":"Singapore self-employed tax calculator: progressive income tax and MediSave contributions","parameters":{"income":{"type":"number","required":true,"description":"Annual gross income in SGD"},"incomePeriod":{"type":"string","default":"yearly","options":["monthly","yearly"]},"expenses":{"type":"number","default":0,"description":"Annual deductible expenses"},"ageGroup":{"type":"string","default":"below35","options":["below35","age35to44","age45to49","age50plus"],"description":"Age group for MediSave rate"},"vatRegistered":{"type":"boolean","default":false,"description":"GST registered (9%)"},"weeklyHours":{"type":"number","default":40,"description":"Weekly working hours"},"paidDaysOff":{"type":"number","default":14,"description":"Annual leave days"}},"example":"/v1/calculate/sg?income=120000&expenses=10000"}