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100% REMOTE JOB: Senior Mainframe Security Analyst (RACF) - Must have - (Audit A...
Posted Today by Prohires
100% REMOTE JOB: Senior Mainframe Security Analyst (RACF) - Must have - (Audit Assessment expertise).Work Location: 100%...
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Mainframe Developer Contractor Day Rate Benchmarks and National Landscape
Live market telemetry, compensation quartiles, and IR35 compliance benchmarks across the UK contract sector.
Median Daily Rate
£425/day
in line with national baselines
Interquartile Range
£300/day – £500/day
Middle 50% market distribution
Contract Engagement Split
30% Outside IR35
25% Inside IR35 engagements
Market Conditions and Compensation Trajectory
Procurement activity for qualified Mainframe Developer specialists across the United Kingdom continues to exhibit sustained momentum across strategic technology delivery programmes. National remuneration data establishes an industry median of £425/day, framed by quartiles from £300/day to £500/day across 37 priced roles to November 2026. Achieving day rates within the 75th percentile band correlates with demonstrable expertise in IT, reinforced by applied capability across cloud infrastructure. Regarding off-payroll engagement terms, 30% of active vacancies are determined outside IR35. Demand is led by IT at 97%. The benchmark dataset rates hiring for Mainframe Developer contractors as moderate: steady rather than stretched.
Daily Rate Quartiles and Market Benchmarks
Day rates and IR35 shares come from the Quality Contracts market benchmark dataset of UK contract postings; sector labels come from vacancies matching this hub. Quartiles use priced roles only.
| Metric | Value | What it shows |
|---|---|---|
| Median day rate | £425/day | Mid-market advertised pay for this hub |
| 25th percentile (P25) | £300/day | Lower-quartile priced vacancies |
| 75th percentile (P75) | £500/day | Upper-quartile priced vacancies |
| Hiring demand | Moderate | Demand level in the benchmark dataset (Moderate, High or Very High) |
| Outside IR35 share | 30% | Stated limited-company / outside SDS |
| Inside IR35 share | 25% | Stated PAYE / umbrella / inside SDS |
| Undetermined IR35 | 45% | Adverts that omit a published status |
| Leading sector | IT (97%) | Largest hiring cluster in the sample |
| Priced sample | 37 roles | Postings with a stated day rate in the benchmark dataset |
| Regional rate band | UK-wide rate parity | Location pricing context, not an SDS |
Statutory Standards and Frequently Asked Questions
Off-payroll working rules still sit with the end client for medium and large private-sector hirers of Mainframe Developer contractors nationwide. A Status Determination Statement should precede start date, and PAYE or umbrella treatment usually follows an inside finding. Outside IR35 work is invoiced to a limited company and tax planning stays with the limited company. Regional pay still follows UK-wide rate parity. Use HMRC guidance and, where needed, a status review rather than the vacancy wording alone. Filter the board above by IR35 to see how the mix lands in IT.
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