The salary trajectory of a Customer Service Agent ranges between locations and employers. The salary starts at £0 per year (estimate) and goes up to £0 per year (estimate) for the highest level of seniority.
The estimated average salary for a Customer Service Agent at Firstsource Solutions is £49,021 per year or £24 per hour, but some professionals have reported earning up to roughly £77,816 per year (90th percentile). The typical pay range is between £38,669 (25th percentile) and £62,687 (75th percentile) annually. This is based on 299 salaries submitted by Firstsource Solutions Customer Service Agent professionals on Glassdoor, as of Jun 2026.