The average salary for a job advertised in Swindon is £3,552 less than the national average of £31,290.
Figures from the first monthly salary index published by jobs website AllTheTopBananas.com reveals the average advertised salary in Swindon in the last six months was £27,738.
The website, which carries one in three UK vacancies, analysed 2,508 jobs in Swindon.
In total it looked at more than 600,000 jobs advertised across the UK between April and September this year.
MD Dave Martin said: "It's fascinating to be able to compare salaries in Swindon to other places nearby and across the UK."
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