The salary trajectory of a a Sales Assistant ranges between locations and employers. The salary starts at £19,624 per year (estimate) and goes up to £91,373 per year (estimate) for the highest level of seniority.
The estimated average salary for a Sales Assistant at Crystal Units is £25,069 per year or £12 per hour, but some professionals have reported earning up to roughly £143,371 per year (90th percentile). The typical pay range is between £17,202 (25th percentile) and £51,238 (75th percentile) annually. This is based on 1 salaries submitted by Crystal Units Sales Assistant professionals on Glassdoor, as of Jun 2026.