Skip to content
worldsalaries .com

Average AS400 Programmer Salary in United Kingdom for 2026

An AS400 programmer in United Kingdom earns about 71,200 GBP a year. That's 2% roughly in line with the national average of 69,700 GBP.

Pay ranges widely from country to country and from role to role. The lowest reported salaries in United Kingdom sit around 36,700 GBP a year, while the very top stretches to 111,700 GBP. Everything on this page is in British pound (GBP, symbol £), which lets you compare numbers like-for-like without worrying about exchange rates.

The numbers here are pulled together from official government wage data, large independent salary surveys, and aggregated worker-reported pay. Most reported salaries include the benefits that are common in United Kingdom, such as housing or transport allowances, which is worth keeping in mind if you're comparing against a country where those are usually paid on top.

To turn a gross salary in United Kingdom into a take-home figure, use our United Kingdom salary after tax calculator, which works the latest tax brackets and contributions through the math for you.

How much does an AS400 programmer make in United Kingdom?

Average salary
71,200 GBP
5,933 GBP per month
Lowest reported
36,700 GBP
3,058 GBP per month
Highest reported
111,700 GBP
9,308 GBP per month

A typical AS400 programmer working in United Kingdom brings home around 5,933 GBP a month before tax. Entry-level pay starts near 36,700 GBP, and the top of the ladder reaches roughly 111,700 GBP for the most experienced and specialised people in the role.

The wide gap between low end and top end reflects how much pay can vary inside the same job title. A junior AS400 programmer working at a small local employer earns very different money from a senior at a multinational. Skills, employer, city and years in the seat all push the number around. For a cross-country comparison, see the AS400 programmer salary in Guernsey or Jersey, both of which pay in the same currency.

How AS400 programmer pay ranges in United Kingdom

A good way to think about salary in United Kingdom is to look at the distribution rather than the headline average. Half of all AS400 programmers in United Kingdom earn less than 68,200 GBP a year, and the other half earn more. That middle number is the median, and it is usually more useful than the average for answering "is my pay normal here".

Looking at the quartiles fills in the picture. A quarter of earners take home less than 50,000 GBP (the 25th percentile), and a quarter clear 85,700 GBP (the 75th percentile). The middle 50% of AS400 programmers sit somewhere inside that band, which is where the typical reader of this page probably lives.

The very lowest reported salaries sit around 36,700 GBP. The highest stretch to 111,700 GBP, though only a small fraction of earners ever reach that level. If you are deciding whether your own offer or current pay is reasonable, work out which of those four bands you would fall into and use that as your reference point.

36,700
Low
68,200
Median
111,700
High
50,000
25th
85,700
75th
The middle 50% sit between the 25th and 75th percentile Tails are the lowest and highest reported All figures in GBP

AS400 programmer pay by experience in United Kingdom

Years of experience is the single biggest lever on pay for an AS400 programmer in United Kingdom, ahead of education and almost any other single factor. The longer you have been in the role, the more your employer can trust you to handle complexity, mentor others and act independently, all of which command higher pay. The chart below shows how the typical AS400 programmer salary changes as you move through the career ladder.

  • 0-2 Years
    43,400 GBP
  • 2-5 Years
    +35% from previous
    58,700 GBP
  • 5-10 Years
    +29% from previous
    76,000 GBP
  • 10-15 Years
    +21% from previous
    92,000 GBP
  • 15-20 Years
    +9% from previous
    100,100 GBP
  • 20+ Years
    +5% from previous
    105,200 GBP

The single largest jump on the ladder is from 0 - 2 Years to 2 - 5 Years, where pay rises by about 35%. That is the point at which a AS400 programmer typically goes from "competent in the role" to "the person other people in the team learn from", and the market pays well for that step.

AS400 programmer pay by education in United Kingdom

Education sits alongside experience as one of the biggest factors driving AS400 programmer pay in United Kingdom. Higher qualifications consistently pull higher salaries, but the size of the gap tends to be smallest at junior levels and widens as people move up. Two people in the same role with the same years of experience but different degrees can end up earning very different money once they reach mid-career.

Below is the average AS400 programmer salary in United Kingdom broken down by the highest level of education a worker has completed.

  • Certificate or Diploma
    49,300 GBP
  • Bachelor's Degree
    +59% from previous
    78,200 GBP
  • Master's Degree
    +38% from previous
    108,200 GBP

AS400 programmer gender pay gap in United Kingdom

The gender pay gap is a stubborn feature of almost every labour market, and United Kingdom is no exception. Male AS400 programmers in United Kingdom earn an average of 73,800 GBP a year, while female AS400 programmers earn around 71,800 GBP. That works out to a 3% gap in favour of men, even when comparing people doing the same work.

A pay gap of this size has a real long-term cost. Over a typical thirty-year career it can add up to several years of pay, and it compounds through pensions, retirement contributions and bonus-linked stock. Some of the gap is explained by women being more likely to work part-time, take career breaks, or be steered toward lower-paying specialisations. Some of it is straightforward unequal pay for the same job, which is harder to defend.

AS400 Programmer gender pay gap

3%

Men earn this much more than women on average in United Kingdom.

Men 73,800 GBP
Women 71,800 GBP

Pay raises for an AS400 programmer in United Kingdom

Most countries hand out at least some kind of pay raise every year, typically when an employee's contract is reviewed or as a cost-of-living adjustment to keep wages roughly in step with inflation. The rhythm and size of those raises varies hugely between industries.

A typical worker doing this role in United Kingdom sees a raise of about 12% every 17 months, which works out to roughly 8% on an annual basis. That figure is the typical underlying rate; in years where inflation runs high you can usually expect a bit more, and in flat-economy years a bit less.

Across all jobs in United Kingdom, the national average raise is around 9% every 15 months.

By industry

Industries with the highest pay raises in United Kingdom:

  • Banking
  • Energy
  • Information Technology
  • Healthcare
  • Travel
  • Construction
  • Education

By experience level

Experienced workers tend to see larger raises. Retaining a senior is cheaper than replacing them, so employers fight harder for them.

  • Junior Level
    3% - 5%
  • Mid-Career
  • Senior Level
  • Top Management

AS400 programmer bonus rates in United Kingdom

Bonuses are the other half of total compensation, and they vary a lot between jobs and industries. Some roles are paid almost entirely in base salary; others lean heavily on bonus structures tied to revenue, project completion or company performance. Whether a job pays a bonus, how big it is, and how often it lands all factor into whether the headline salary is actually a good offer.

55%

55% of AS400 programmers in United Kingdom reported a bonus of some kind in the past twelve months. That makes an AS400 programmer a moderate-bonus role overall, which is useful context when you're weighing up a job offer where the base is below market.

Among those who did receive a bonus, the size of the payment varied substantially. Reported bonuses ranged from 3% to 5% of base salary. The remaining 45% of AS400 programmers reported no bonus at all over the same period.

Which careers pay bonuses in United Kingdom

Revenue-facing roles tend to pay the biggest bonuses. Operational and support roles tend toward smaller, more predictable ones.

  • Finance
  • Architecture
  • Sales
  • Business Development
  • Marketing / Advertising
  • Information Technology
  • Healthcare
  • Insurance
  • Customer Service
  • Human Resources
  • Construction
  • Transport
  • Hospitality

AS400 programmer: public vs private sector pay

Public-sector pay in United Kingdom is about 7% more than private-sector pay for similar work. The private sector typically offers stronger upside and bigger bonuses; the public sector typically offers better benefits and stability.

Public vs private pay gap

6%

Public-sector workers earn this much more than private-sector workers in United Kingdom on average.

Public sector 72,700 GBP
Private sector 68,200 GBP

AS400 programmer salary by city and region in United Kingdom

AS400 programmer pay is not even across United Kingdom. The chart below shows the highest-paying cities and regions in the dataset, followed by the full location table.

  • England
  • Scotland
  • Bradford
  • Liverpool
  • Edinburgh
  • Leeds
  • Somerset
  • Manchester
  • Kingston upon Hull
  • Belfast
LocationTypeAverageMedianRange
EnglandRegion134,100 GBP127,600 GBP68,800-205,700 GBP
ScotlandRegion105,800 GBP102,700 GBP54,100-161,300 GBP
BradfordCity83,800 GBP74,700 GBP45,000-123,800 GBP
LiverpoolCity83,700 GBP86,100 GBP36,800-130,500 GBP
EdinburghCity83,700 GBP79,800 GBP41,400-127,700 GBP
LeedsCity83,400 GBP83,400 GBP42,400-127,600 GBP
SomersetCity82,300 GBP87,400 GBP39,100-130,500 GBP
ManchesterCity81,900 GBP75,800 GBP45,700-127,700 GBP
Kingston upon HullCity81,000 GBP79,600 GBP42,400-123,800 GBP
BelfastCity81,000 GBP78,200 GBP42,700-125,400 GBP
WolverhamptonCity80,900 GBP84,800 GBP35,200-127,600 GBP
CoventryCity80,500 GBP87,300 GBP39,800-130,500 GBP
NottinghamCity80,400 GBP79,600 GBP40,200-125,400 GBP
GlasgowCity80,300 GBP80,300 GBP42,000-127,700 GBP
BirminghamCity79,600 GBP89,300 GBP38,100-128,400 GBP
LondonCity79,600 GBP86,300 GBP35,400-127,600 GBP
BristolCity78,700 GBP75,900 GBP40,300-123,000 GBP
NewcastleCity78,500 GBP73,500 GBP39,800-117,100 GBP
BrightonCity78,500 GBP72,000 GBP40,200-117,100 GBP
SheffieldCity78,100 GBP73,700 GBP40,300-118,900 GBP
PlymouthCity77,300 GBP82,300 GBP36,400-124,500 GBP
NewportCity77,300 GBP82,200 GBP33,000-119,700 GBP
YorkCity77,000 GBP68,800 GBP38,900-114,900 GBP
DerbyCity76,900 GBP83,700 GBP36,400-123,000 GBP
SouthamptonCity76,900 GBP77,400 GBP39,800-118,900 GBP
CardiffCity76,800 GBP83,800 GBP36,800-124,500 GBP
LeicesterCity75,800 GBP80,200 GBP36,700-119,700 GBP
DundeeCity74,900 GBP71,400 GBP40,300-115,600 GBP
CambridgeCity74,500 GBP73,700 GBP38,700-114,600 GBP
ArmaghCity73,100 GBP66,200 GBP36,900-109,700 GBP
AberdeenCity72,700 GBP70,800 GBP39,800-112,700 GBP
NewryCity72,700 GBP72,400 GBP35,500-114,600 GBP
LincolnCity72,300 GBP76,900 GBP35,500-114,300 GBP
OxfordCity72,000 GBP72,000 GBP34,800-114,600 GBP
ExeterCity71,900 GBP67,300 GBP39,300-111,700 GBP
SwanseaCity71,700 GBP68,400 GBP40,500-112,700 GBP
PooleCity71,600 GBP77,400 GBP31,700-114,600 GBP
AbingdonCity70,100 GBP69,700 GBP33,600-107,700 GBP
PortsmouthCity69,800 GBP78,500 GBP32,900-114,900 GBP
GloucesterCity69,700 GBP66,900 GBP38,700-107,700 GBP
InvernessCity69,200 GBP69,700 GBP33,000-109,000 GBP
PeterboroughCity69,200 GBP72,400 GBP35,300-111,700 GBP
NorwichCity68,900 GBP65,900 GBP35,500-105,800 GBP
DerryCity68,500 GBP68,400 GBP35,300-109,000 GBP
WalesRegion68,500 GBP63,500 GBP36,800-105,800 GBP
RiponCity67,800 GBP59,800 GBP36,000-100,900 GBP
LisburnCity67,600 GBP67,600 GBP32,200-103,600 GBP
WinchesterCity67,600 GBP68,200 GBP29,400-105,200 GBP
CanterburyCity67,400 GBP67,400 GBP35,100-102,700 GBP
WellsCity67,000 GBP67,300 GBP30,200-103,600 GBP
ChesterCity66,900 GBP66,200 GBP34,100-102,700 GBP
BangorCity66,900 GBP66,200 GBP30,200-103,600 GBP
WakefieldCity66,900 GBP66,900 GBP31,400-103,600 GBP
StromnessCity66,700 GBP70,700 GBP29,600-105,800 GBP
Northern IrelandRegion66,700 GBP66,700 GBP32,900-103,600 GBP
SalisburyCity66,700 GBP61,800 GBP34,400-100,700 GBP
StirlingCity66,400 GBP69,800 GBP32,200-107,700 GBP
HartlepoolCity66,400 GBP63,800 GBP33,000-103,600 GBP
DurhamCity65,400 GBP71,000 GBP29,100-105,200 GBP
StrontianCity64,100 GBP56,600 GBP35,300-94,400 GBP
TruroCity63,700 GBP63,700 GBP32,600-99,700 GBP
KirkwallCity63,400 GBP66,200 GBP32,900-103,600 GBP
St DavidsCity62,600 GBP59,800 GBP34,000-96,600 GBP

AS400 Programmer in United Kingdom: FAQs

  • How much does an AS400 programmer make per month in United Kingdom?

    An AS400 programmer in United Kingdom earns about 5,933 GBP a month before tax, based on an annual average of 71,200 GBP.

  • What's the salary range for an AS400 programmer in United Kingdom?

    Entry-level AS400 programmers in United Kingdom start near 36,700 GBP. Top-end pay reaches around 111,700 GBP. The middle 50% of earners sit between 50,000 and 85,700 GBP.

  • Is the median AS400 programmer salary in United Kingdom higher or lower than the average?

    The median is 68,200 GBP, lower than the average of 71,200 GBP. Half of AS400 programmers in United Kingdom earn below the median, half earn above it.

  • What's the gender pay gap for AS400 programmers in United Kingdom?

    Men working as an AS400 programmer in United Kingdom earn around 3% more than women on average (73,800 vs 71,800 GBP a year).

  • Do AS400 programmers in United Kingdom get bonuses?

    About 55% of AS400 programmers in United Kingdom reported a bonus in the past 12 months. Reported bonuses ranged from 3% to 5% of base salary.

  • Do AS400 programmers earn more in the public or private sector in United Kingdom?

    In United Kingdom, the public sector pays an AS400 programmer about 7% more on average. Public-sector pay tends to be steadier; private-sector pay tends to offer bigger upside.

  • How often do AS400 programmers in United Kingdom get a pay raise?

    An AS400 programmer in United Kingdom sees a raise of around 12% every 17 months, equivalent to roughly 8% a year.