Amazon Flex drivers in California pay 15.3% SE tax + federal + CA state tax (1–13.3%). On $40,000 net: approximately $5,652 SE tax + $3,200 federal + ~$1,800 CA = ~$10,652 total. Quarterly payment: ~$2,663. Mileage at 72.5¢/mile is your top deduction.
Amazon Flex drivers are independent contractors who use their own vehicles to deliver packages. Every delivery mile and required equipment is deductible. This page covers all federal deductions plus California-specific tax rules for package delivery workers.