The estimated average salary for a Customer Service Representative CSR at Firstsource Solutions is $30,080 per year or $14 per hour, but some professionals have reported earning up to roughly $31,095 per year (90th percentile). The typical pay range is between $29,065 (25th percentile) and $31,095 (75th percentile) annually. This is based on 3 salaries submitted by Firstsource Solutions Customer Service Representative CSR professionals on Glassdoor, as of July 2026.