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PhD Synthetic and Analytical Chemist, AI Expert (Remote, UK or US East Coast)
Posted Today by Weekday AI
Job OverviewWe are seeking highly skilled PhD-qualified chemists with strong expertise in synthetic and analytical chemi...
- Rate £100 per hour
- Category Outside
- Work type Remote
- Location United Kingdom
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PhD Genomics and Cell Biology Scientist, AI Expert (Remote, UK or US East Coast)
Posted Today by Weekday AI
Job OverviewWe are looking for highly skilled PhD-qualified scientists in genomics and cell biology to contribute to the...
- Rate £100 per hour
- Category Outside
- Work type Remote
- Location United Kingdom
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Sign UpAI Contractor Day Rate Benchmarks and National Landscape
Live market telemetry, compensation quartiles, and IR35 compliance benchmarks across the UK contract sector.
Median Daily Rate
£600/day
-14.3%
Interquartile Range
£568/day – £650/day
Middle 50% market distribution
Contract Engagement Split
60% Outside IR35
7% Inside IR35 engagements
Market Conditions and Compensation Trajectory
Capital expenditure on complex software modernisation initiatives throughout the UK digital landscape continues to drive healthy recruitment for experienced AI contractors. Modernisation initiatives specifically demand proven expertise across AI and Machine Learning production engineering, paired with hands-on systems integration within enterprise-scale cloud infrastructure environments. Compensation registers a UK median of £600/day, with quartiles from £568/day to £650/day to November 2026. 60% of active roles operate under verified outside-IR35 status, enabling practitioners to contract via personal service companies. Figures summarise advertised pay on this hub to November 2026 and are market statistics, not a personal offer or guaranteed assignment rate.
Daily Rate Quartiles and Market Benchmarks
Values combine advertised day rates, stated IR35 outcomes, and sector labels from vacancies matching this hub. Quartiles use priced roles only.
| Metric | Value | What it shows |
|---|---|---|
| Median day rate | £600/day | Mid-market advertised pay for this hub |
| 25th percentile (P25) | £568/day | Lower-quartile priced vacancies |
| 75th percentile (P75) | £650/day | Upper-quartile priced vacancies |
| Outside IR35 share | 60% | Stated limited-company / outside SDS |
| Inside IR35 share | 7% | Stated PAYE / umbrella / inside SDS |
| Undetermined IR35 | 33% | Adverts that omit a published status |
| Leading sector | AI & Machine Learning (62%) | Largest hiring cluster in the sample |
| Priced sample | 13 roles | Vacancies used for the rate corridor |
| 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 AI 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 AI and Machine Learning.
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