If you suspect you're underpaid, you probably are. Most UK employees who actually check find they're 8 to 20 percent below market rate for their role. Find out exactly where you stand against the data.
The median UK full time salary in 2025 is around £37,430 per year before tax, according to the latest Office for National Statistics (ONS) Annual Survey of Hours and Earnings. Median means half of UK workers earn more, half earn less. The mean (average) is higher, around £42,000, because high earners pull the average up. Median is the more useful comparison number for most people.
UK median full time earnings by age in 2025 are roughly: 18-21 year olds £20,800, 22-29 year olds £28,500, 30-39 year olds £37,200, 40-49 year olds £40,100, 50-59 year olds £38,900, and 60+ year olds £35,600. Earnings typically peak in your forties and slowly decline as people move toward retirement. If you are significantly below the median for your age group, it usually means either you are early in your career, in a lower paying sector, or genuinely underpaid.
The clearest signs of being underpaid are: your salary has not risen meaningfully in 2+ years despite inflation, you are doing the same role as colleagues earning more, comparable jobs at other companies pay 15+ percent higher, or your salary is significantly below the median for your age, region, and sector. Tools like Glassdoor, LinkedIn Salary, and Reed help triangulate the going rate for your specific role. If you are 10+ percent below median for your peers, you are likely underpaid.
Successful pay rise negotiations typically follow three steps. First, gather data: average salaries for your role from Glassdoor, LinkedIn, and recruitment sites, plus your specific achievements over the past 12 months. Second, request a meeting with your manager and present a specific number based on the data, not a vague ask. Third, be prepared to walk away or accept alternatives like extra leave or pension contributions. Most UK employees who actually negotiate get 5 to 15 percent. Most who do not ask receive no rise at all.
Changing jobs typically delivers 10 to 25 percent pay jumps, far more than internal promotions or annual reviews (which average 3 to 5 percent in the UK). The trade off is risk, you need to like the new role and culture, and the first 6 months at any new job are riskier than staying put. As a general rule, if you have been in your current role for more than 2 years and are below market rate, the maths usually favours moving. Repeated job changes every 18 to 24 months can compound to far higher lifetime earnings than staying in one company.
The median UK salary for someone aged 30-39 is around £37,200 per year. However, this varies massively by region (London median around £45,000, North East around £31,000) and by sector (tech and finance typically £45-60k, hospitality and retail often £25-30k). At 30, being slightly above your sector and regional median is healthy. Being significantly below suggests you should consider negotiating, switching companies, or upskilling.